Detergent composition with bleach system

Abstract

The invention relates to an automatic dishwashing composition comprising a bleach system including an iron bleach catalyst.

Description

[0001] The invention relates to an automatic dishwashing composition comprising a bleach system including an iron bleach catalyst.

[0002] Automatic dishwashing detergents have been in the market for almost a century now. Environmental regulations in terms of cleaning ingredients and energy requirements have changed over time. Phosphate-free compositions presently are "state of the art", however, it is still difficult to obtain cleaning results comparable to those obtained with phosphate-comprising compositions. Users expect good cleaning and at the same time good finishing (lack of filming and spotting, and shine) of the washed items. One approach to obtain good cleaning results is to include a bleach system in the detergent composition.

[0003] Such bleaching systems include bleach catalysts, wherein the "gold standard" are manganese containing catalysts, in particular MnTACN. However, manganese is a heavy metal, which is not desirable for environmental reasons.

[0004] The state of the art describes a plurality of further bleach catalyst comprising systems for detergent compositions, mainly for laundry compositions and automatic dishwashing compositions. One type of non-manganese bleach catalysts is an iron-based catalyst as described in WO 02 / 48301 A or WO 05 / 042532 A. Two of such bleach catalysts are commercially available by WeylChem, Germany under the tradename WeylClean ®< FeONIX and FeOnix-A, which are shown to provide good cleaning performance in laundry detergent compositions (EP 4 299 701 A, EP 4 299 702 A, EP 4 299 703 A), when the further composition ingredients are adapted to the desired approach.

[0005] Automatic dishwashing compositions have to fulfill a completely different set of requirements than laundry compositions, thus, they differ clearly in their ingredients.

[0006] It was an object of the present invention to provide an effective automatic dishwashing composition, being efficient in a wide alkaline pH range and temperature range and further having a reduced environmental impact. The performance of the detergent composition should be at least comparable to the results of conventional dishwashing compositions, preferably even better. One "difficult" stain to remove on dishes are tea stains, thus, the main focus was to provide good tea stain cleaning performance.

[0007] This object is met by an automatic dishwashing detergent composition comprising (a) at least one iron-based bleach catalyst, representing a complex, wherein iron is the transition metal (complexed ion) and the ligands are of formula (1) or (2), (b) at least one bleaching agent, providing hydrogen peroxide or oxygen, (c) optionally a bleach activator,

[0008] An example of the catalyst having the compound of formula (1) as a ligand is shown in FIG. 1DETERGENT COMPOSITION

[0009] The detergent composition according to the invention is an automatic dishwashing detergent (ADD) composition.

[0010] The ADD composition preferably is provided for domestic or professional use. The detergent compositions can be used in domestic or professional appliances. Preferred is that the detergent composition is used at domestic level. It can be a powder, a gel, paste, liquid, granulate, compacted granulate or provided in unit dose form. Preferably it is in unit dose form, wherein unit dose forms include pressed tablets and water-soluble packages comprising the detergent. The composition of the invention can be provided in the form of a multi-compartment pack (often called pouches, pods or capsules), e.g. a multi-compartment pack comprising compartments with compositions having different ingredients or which are in different physical forms, for example a compartment comprising a composition in solid form and another compartment comprising a composition in liquid or gel form. Preferably at least a part of the composition is in solid form. A preferred unit dose form is a tablet or a multi-compartment pack. A unit dose of the ADD composition of the present invention preferably is in the range of from 5 to 50 g per wash, preferably from 5 to 40 g, more preferred from 5 to 30 or from 5 to 25 g per unit / per wash.WASHING PROCES

[0011] Dishwashers have become more environmentally friendly over the years. This can be seen in the reduction of the amount of energy a dishwasher needs and of the amount of water used during the whole washing cycle of the chosen program or during the cleaning step in a complete washing cycle.

[0012] With the reduction of water usage in the cleaning step, the detergent is, with the modern and more environmentally friendly dishwashers, dissolved in less water compared to older dishwashers. Where the older dishwashers use over 5 liter water in the cleaning step, the modern dishwashers use around 3 liter or less. This results directly in that the detergent concentration in the washing water is increased in modern dishwashers.

[0013] Due to the increase of detergent concentration in the washing water, there is a trend that soiled items in the dishwasher are cleaned better and / or faster. This can be clearly seen for usage of bleaching systems that perform better in modern dishwashers. (Combinations of) ingredients are provided showing a good performance with an increased detergent concentration.CATALYST

[0014] Component (a) is an iron-based bleach catalyst. The basic structure of said type of catalyst is described in WO 02 / 48301 A, wherein two effective compounds are commercially available from WheylChem, Germany, sold under the trademarks WeylClean ®< FeOnix (iron-based catalyst having a ligand compound according to Formula (1)) and WeylClean ®< FeONIX-A (ligand compound according to Formula (2)).

[0015] Any of the iron-based bleach catalysts as described in WO 02 / 48301 A might be suitable to be used in an ADD composition, however, according to the present invention an iron-based complex having as the ligand at least one of the two compounds of Formula (1) or Formula (2) is present. It is preferred, that at least an iron-bleach catalyst having a ligand according to Formula (2) is present. A complex with a ligand of Formula (2) can be the only bleach catalyst in the composition.

[0016] The iron-based bleach catalyst (a) can be present in any suitable amount, but suitable appears that the catalyst is present in an amount of from 0.005 to 2.5 wt.%, or from 0.01 to 1.5 wt.%, or from 0.015 to 0.75 wt.%, preferably from 0.02 to 0.5 wt.%, more preferred from 0.025 to 0.4 wt.%, or even more preferred from 0.025 to 0.3 wt.% or most preferred from 0.05 to 0.3 wt.% of the ADD composition. Also preferred are amounts of 0.1 to 0.6 wt.% or 0.075 to 0.4 wt.% of the ADD composition.

[0017] The iron-based bleach catalyst (a) can be present in any suitable amount, but suitable appears that the catalyst is present in an amount of from 1 to 500 milligram, or from 2 to 300 milligram, or from 3 to 150 milligram, preferably from 4 to 100 milligram, more preferably from 5 to 80 milligram, even more preferably from 5 to 60 milligram and most preferable from 10 to 60 milligram per standard dose of the ADD composition per wash.

[0018] The iron-based bleach catalyst (a) can be present, as part of a complete detergent composition, in any suitable concentration in the washing water during the cleaning step of a complete washing cycle of the dishwasher. Preferred concentrations range from 2 to 25 milligram per liter water (mg / l), or from 2.5 to 20 mg / I, or from 3 to 18 mg / l, or from 4 to 15 mg / l, or from 5 to 12 mg / l. Also preferred are concentrations from 3 to 12 mg / l, or 3 to 8 mg / l. Even more preferred are concentrations from 5 to 35 mg / I, or from 8 to 30 mg / l.BLEACHING AGENT

[0019] As component (b) the composition comprises one or more bleaching agent(s), providing a source of hydrogen peroxide (H 2 O 2 ) or of oxygen, respectively. The bleaching agent is or comprises a H 2 O 2 or an oxygen-releasing bleaching agent. The bleaching agent may comprise the active bleach species itself or a precursor to that species. Preferably, the bleaching agent is selected from the group consisting of an inorganic peroxide, an organic peracid and mixtures of two or more thereof. The terms "inorganic peroxide" and "organic peracid" encompass salts and derivatives thereof. Examples of organic peracids are perbenzoic acid and peroxycarboxylic acids e.g. phthalimidoperoxyhexanoic acid (PAP). Inorganic peroxides include percarbonates, perborates, persulphates, hydrogen peroxide and derivatives and salts thereof. The sodium and potassium salts of these inorganic peroxides are suitable, especially the sodium salts. Sodium percarbonate is particularly preferred, even more preferred is coated sodium percarbonate.

[0020] The active bleaching agent(s) (b) can e.g. be present in a total amount of from 2,5 to 40 wt.%, such as from 3 to 35 wt.%, from 4 to 30 wt.%, or from 5 to 25 wt.%, or from 6 to 20 wt.% of the detergent composition.

[0021] The active bleaching agent(s) (b), especially the inorganic peroxides, is / are preferably present in a total amount of from 5 to 80 wt.%, or from 10 to 80 wt.%, or from 10 to 70 wt.%, or from 10 to 60 wt. %, or from 10 to 50 wt.%, or from 10 to 40 wt.%, or from 10 to 35 wt.%, or from 10 to 30 wt.% in the detergent composition. Also preferred are amounts of 5 to 30 wt.% or of 15 to 40 wt.% or of 30 to 70 wt.% of the detergent composition.

[0022] The active bleaching agent(s) (b), especially the inorganic peroxides, is / are preferably present in a total amount of from 1 to 16 gram, or from 2 to 16 gram, or from 2 to 14 gram, or from 2 to 12 gram, or from 2 to 10 gram, or from 2 to 8 gram, or from 2 to 7 gram, or from 2 to 6 gram per standard dose of the ADD composition per wash. Also preferred are amounts of 1 to 6 gram, or of 3 to 8 gram, or of 6 to 14 gram per standard dose of the ADD composition per wash. The active bleaching agent(s) (b), especially the organic peracids, is / are preferably present in a total amount of from 1 to 20 wt.%, or from 1 to 15 wt.%, or from 1.5 to 15 wt.%, or from 1.5 to 10 wt.%, or from 2 to 10 wt.%, or from 2 to 7.5 wt.%, or from 2.5 to 7.5 wt.%, or from 2.5 to 6 wt.% in the detergent composition.

[0023] The active bleaching agent(s) (b), especially the organic peracids, is / are preferably present in a total amount of from 0.2 to 4 gram, or from 0.2 to 3 gram, or from 0.3 to 3 gram, or from 0.3 to 2 gram, or from 0.4 to 2 gram, or from 0.4 to 1.5 gram, or from 0.5 to 1.5 gram, or from 0.5 to 1.2 gram per standard dose of the detergent composition per wash.

[0024] The mentioned ranges may refer to any individually used bleaching agent, but refer in particular to the total amount of the bleaching agents.BLEACH ACTIVATORS

[0025] The composition further preferably comprises as component (c) one or more bleach activator(s). Any suitable bleach activator may be included, for example TAED (tetraacetylethylenediamine), NOBS (sodium-para-nonanoyloxybenzenesulfonate), LOBS (sodium-para-dodecanoyloxybenzenesulfonate), DOBA (decanoyloxybenzoic acid), DECOBS (decanoic acid,2-[[(4-sulfophenoxy)carbonyl]oxy]ethyl ester, sodium salt), nitrilquats or alkyl oxybenzene sulphonate, if this is desired for the activation of the bleaching agent. The organic peracids such as perbenzoic acid and peroxycarboxylic acids e.g. phthalimidoperoxyhexanoic acid (PAP) do not necessarily require the use of a bleach activator, as these bleaches are active at relatively low temperatures such as about 30 °C. A preferred composition contains a bleach activator, more preferred is that the composition contains TAED. It is further preferred that the composition contains a bleach activator and is free of a manganese-containing bleach catalyst, more preferred is that the composition contains TAED and is free of MnTACN.

[0026] The bleach activator is present in a total amount of from 0 to 15 wt.%, or from 0.3 to 15 wt.%, or from 0.3 to 12 wt.%, or from 0.3 to 9 wt.%, or from 0.5 to 7 wt.%, or from 0.75 to 7 wt.%, or from 1 to 7 wt.%, or from 1 to 6 wt.%, or from 1 to 5 wt.% of the detergent composition.

[0027] The bleach activator is present in a total amount of from 0.05 to 3 gram, or from 0.1 to 2 gram, or from 0.1 to 1.5 gram, or from 0.1 to 1.25 gram, or from 0.1 to 1 gram, or from 0.2 to 0.75 gram per standard dose of the detergent composition per wash.

[0028] The mentioned ranges may refer to any individually used bleaching activator, but refer in particular to the total amount of the bleaching activators.NONIONIC SURFACTANTS

[0029] It is preferred that the composition comprises further as component (d) at least one nonionic surfactant(s).

[0030] ADD compositions preferably comprise nonionic surfactants in a total amount of from 0.2 to 15 wt.%, such as from 0.5 to 10 wt.%, from 0.8 to 10 wt.%, from 0.8 to 8 wt.%, from 1 to 7 wt.%, from 1.2 to 6 wt.%, or from 1.5 to 5 wt.%, or from 1.8 to 5 wt.% or 2 to 4 wt.% of one or more nonionic surfactants. Also preferred amounts of nonionic surfactants in ADD compositions are from 0.5 to 1.5 wt.%, or from 1 to 3 wt.%, or from 2 to 8 wt.%.

[0031] ADD compositions preferably comprise nonionic surfactants in a total amount of from 0.05 to 4 gram, such as from 0.05 to 2 gram, from 0.05 to 1.5 gram, from 0.1 to 1.5 gram, from 0.1 to 1.25 gram, from 0.2 to 1.25 gram, or from 0.2 to 1 gram of one or more nonionic surfactants per standard dose of the detergent. Also preferred amounts of nonionic surfactants in ADD compositions are from 0.1 to 0.5 gram, or from 0.3 to 0.8 gram, or from 0.5 to 3 gram of one or more nonionic surfactants per standard dose of the detergent.

[0032] The mentioned ranges may refer to any individually used nonionic surfactant, but refer in particular to the total amount of the nonionic surfactants.

[0033] The ADD composition can be divided in different parts, e.g. when the product is in the form of a unit dose multi-chamber water-soluble pouch or a tablet, wherein said parts can comprise different types of nonionic surfactants, each within the range mentioned before, however, the total content of the nonionic surfactants within the whole unit dose as well is within the mentioned ranges.

[0034] Nonionic surfactants are commonly known and comprise e.g. modified alcohol polyglycol ether, fatty alcohols, fatty alcohol glycol ether (alkoxylated fatty alcohols), like fatty alcohol ethoxylates and fatty alcohol propoxylates, alkylglucosides, alkylpolyglucosides and phenolethoxylates, like octyl- or nonyl phenolethoxylates.

[0035] Preferred nonionic surfactants are modified alcohol polyglycol ether, modified alcohol poly-(ethylenglycol)-ether, alkoxylated fatty alcohols (also optionally modified), alkoxylated fatty acids or combinations thereof. The relative hydrophilic alkoxy-chain comprises or essentially consists of ethylene oxide, propylene oxide or butylene oxide or combinations thereof. The length of this chain can vary between averagely 1 and averagely 200 ethylene oxide-, propylene oxide- or butylene oxide-groups or combinations thereof, including 2, 3 4, 6, 8, 10, 13, 15, 20, 25, 30, 40, 50, 80, 100 and the ranges between the particularly mentioned.

[0036] The relative hydrophobic hydrocarbon-chain from the fatty alcohol or fatty acid can be saturated, mono-unsaturated or poly-unsaturated and linear or branched. The length of this hydrocarbon-chain varies between 4 and 30 carbon molecules, including 6, 8, 10, 11, 12, 14, 16, 18, 20, 22, 24, 26 or 28.

[0037] Preferred surfactants of this type may be represented by the formula R 1< O (CH 2 CH 2 O) x (CH 2 CH(CH 3 )O) y H, wherein R 1< is a linear or branched, saturated or unsaturated hydrocarbon residue having 4 to 30 C atoms, preferably 6 to 26, even more preferred 10 to 24 C atoms, x preferably is an integer of from 8 to 200, preferably from 20 or from 25 to 200, y preferably is an integer of at most 100 and x+y is below 200. Such nonionic surfactants having long EO- or EO / PO-chains are known as "carry over surfactants". In might be preferred that in at least one of the "carry over" surfactants x is at least 26, preferably at least 30, and even more preferred at least or more than 40, however, below 200. R 1< preferably is a linear, saturated hydrocarbon residue.

[0038] Particularly preferred are alcohol ethoxylates that can be prepared by ethoxylation of a fatty chain alcohol. The preferred alcohol ethoxylates have a hydrocarbon-chain that ranges from 4 up to 26 carbon molecules, including 4, 6, 8, 10, 12, 14, 16, 18, 20, 22 and between averagely 1 and averagely 200 ethylene oxide-groups, including averagely 3, 4, 6, 8, 10, 13, 15, 20, 25, 30, 40, 50, 80, 100 ethylene oxide-groups.

[0039] Preferred modified alcohol polyglycol ether may be represented by the formula R 1< O (CH 2 CH 2 O) x R 2< .

[0040] R 1< represents a linear or branched, saturated or unsaturated hydrocarbon residue having 4 to 30 C atoms, or 4 to 26 C atoms, preferably 6 to 22 C atoms more preferably 6 to 16 C atoms.

[0041] R 2< represents a linear or branched, saturated or unsaturated hydrocarbon residue having 4 to 30 C atoms, or 4 to 26 C atoms, or preferably 6 to 22 C atoms more preferably 6 to 16 C atoms, and may also represent a hydrogen (H) atom, a methyl-, an ethyl-, a propyl- or an isopropyl-group, or a butyl-group, including iso-, sec- and tert-butyl.

[0042] Optionally the R 1< and the R 2< hydrocarbon residue may comprise at least one hydroxy-group.

[0043] 'x' represents the average number of ethylene oxide groups in the surfactant molecule, and preferably is an integer of from 8 to 200, or from 20 or 25 to 200, or from 8 to 30, or from 30 to 40, or from 15 to 20.

[0044] The preferred modified alcohol polyglycol ether may consist of 1 representation from the given formula, or a mixture of 2, 3 or more representations of the given formula.

[0045] Also preferred are fatty acid ethoxylates that can be prepared by a reaction of fatty acid with ethylene oxide or a polyglycol with the general formula RCOO -< (CH 2 CH 2 O) n H. When a polyglycol is used a mixture of mono- and di-esters (RCOO -< (CH 2 CH 2 O) n -OCOR) is produced. The preferred fatty acid has a hydrocarbon-chain R that varies from 4 up to 26 carbon molecules, including 4, 6, 8, 10, 12, 14, 16, 18, 20, 22. The number of ethylene oxide-groups in the fatty acid ethoxylate is between averagely 1 and averagely 200 ethylene oxide-groups, including averagely 4, 6, 8, 10, 13, 15, 20, 25, 30, 40, 50, 80, 100 ethylene oxide-groups.

[0046] One example of suitable surfactants are those of the Lutensol type (BASF, Germany), like Lutensol AT, e.g. Lutensol AT25, Lutensol AT50 , Lutensol AT80, or other suitable C chain length or EO content.

[0047] Also usable are ethylene oxide-propylene oxide co-polymers which may be prepared with a starting material that reacts with ethylene oxide (EO) or propylene oxide (PO) or a mixture of EO and PO (resulting in block copolymers). The starting materials that can be used are (difunctional) poly(oxypropylene glycol) or (difunctional) poly(oxyethylene glycol) or glycerol (for trifunctional products) or ethylene diamine (for tetrafunctional products).

[0048] Further suitable are sucrose esters that may be produced by esterification of sucrose with fatty acids or fatty glycerides. Alkyl polyglucosides (APG) may be produced by a reaction of a fatty alcohol with a glucose. Preferred APGs can have averagely one to averagely four glucose units and has a hydrocarbon-chain that varies from 4 up to 26 carbon molecules, including 4, 6, 8, 10, 12, 14, 16, 18, 20, 22.

[0049] Nonionic surfactants can be "end-capped" by a methyl or a ethyl group at the end of the alkoxy-chain. This affects the properties of the surfactant, e.g. it decreases the foaming behaviour. It is also known that nonionic surfactants can be "end-capped" with a fatty alcohol or a fatty acid where the hydrocarbon-chain varies from 4 up to 26 carbon molecules, including 4, 6, 8, 10, 11, 12, 14, 16, 18, 20, 22. The structure of the surfactants than is "hydrocarbon chain - alkoxy chain - hydrocarbon chain".

[0050] The cleaning composition, in particular the ADD compositions of the present invention can preferably comprise low foaming nonionic surfactants (LFNls). LFNI can be present in amounts from 0 to about 15% by weight, preferably from about 0.01 to 10% by weight, more preferred from about 0.25% to about 8% by weight and most preferred from about 0.5 to 6 % by weight. LFNls are most typically used in ADDs on account of the improved water-sheeting action (especially from glass) which they confer to the ADD product. They may also encompass non-silicone, nonphosphate polymeric materials which are known to defoam food soils encountered in automatic dishwashing.

[0051] Preferred LFNls include nonionic alkoxylated surfactants, especially ethoxylates derived from primary alcohols, and blends thereof with more sophisticated surfactants, such as the polyoxypropylene / polyoxyethylene / polyoxypropylene reverse block polymers. The PO / EO / PO polymer-type surfactants are well-known to have foam suppressing or defoaming action, especially in relation to common food soil ingredients such as egg.

[0052] The invention encompasses preferred embodiments wherein LFNI is present, and wherein this component is solid at about 35°C, more preferably solid at about 25°C. For ease of manufacture, a preferred LFNI has a melting point between about 25°C and about 60°C, more preferably between about 27°C and 45°C.

[0053] In a preferred embodiment, the LFNI is an ethoxylated surfactant derived from the reaction of a monohydroxy alcohol containing from about 8 to about 20 carbon atoms with from about 6 to about 80 moles of ethylene oxide per mole of alcohol on an average basis.

[0054] A particularly preferred LFNI is derived from a straight chain fatty alcohol containing from about 16 to about 20 carbon atoms (C 16 -C 20 alcohol), preferably a C 18 alcohol, condensed with an average of from about 6 to about 15 moles, preferably from about 7 to about 12 moles, and most preferably from about 7 to about 9 moles of ethylene oxide per mole of alcohol. Preferably the ethoxylated nonionic surfactant so derived has a narrow ethoxylate distribution relative to the average.

[0055] Suitable block polyoxyethylene-polyoxypropylene polymeric compounds may include those based on ethylene glycol, propylene glycol, glycerol, trimethylolpropane and ethylenediamine as initiator reactive hydrogen compound. Polymeric compounds made from a sequential ethoxylation and propoxylation of initiator compounds with a single reactive hydrogen atom, such as C 12-18 aliphatic alcohols, do not generally provide satisfactory suds control in the instant ADDs. Certain of the block polymer surfactant compounds designated PLURONIC ®< and TETRONIC ®< by BASF, are suitable in ADD compositions of the invention.

[0056] The use of a mixture of any of the aforementioned nonionic surfactants is suitable in compositions of the present invention.OTHER INGREDIENTS

[0057] The detergent composition according to the invention comprises at least one further ingredient, selected from builder(s), further surfactant(s), complexing agents, dyes, corrosion inhibitors, silver-protecting agents, anti-redeposition agents, perfumes, process aids, enzymes, and combinations thereof, without being restricted to the mentioned.

[0058] One common ingredient of cleaning compositions, in particular ADD compositions are builders. Thus, to include at least one builder is preferred for the detergent composition of the present invention.

[0059] The detergent composition of the present invention is substantially free of phosphates, however comprises a builder system of other builders.

[0060] "Substantially free" as used herein should be understood in a way that the according compound is not deliberately included in the composition. However, trace levels, e.g. due to impurities and / or contamination, may be present in the composition, although preferably this is avoided. Typically, if present, the level of any compound for which it is described the composition is "substantially free" of, is present in an amount of less than 2.0 wt.%, preferably the composition comprises less than 1 wt.%, preferably less than 0.5 wt.%, even more preferred less than 0.1 wt.% of the composition. This compound may have no noticeable performance or effect in the composition. Most preferred the composition does not comprise any amount of said compound. Thus, the definition "substantially free" includes also the definition "completely free".BUILDER

[0061] The term "builder" as used herein includes sequestering (e.g. polycarboxylic acids like citrate) and precipitating builders (e.g., carbonates) but excludes materials that function primarily as alkalis such as NaOH, KOH and alkaline silicates such as sodium metasilicate and amorphous silicates having an SiO 2 to Na 2 O ratio of greater than 1. The compositions of the invention may however comprise alkali metal silicates in order to provide protection against corrosion of metals and against attack on dishware, including china and glassware, and for pH control, although the compositions can also be substantially free of metal silicates. Silicates give rise to high pH compositions which can be aggressive, producing corrosion and attacking the dishware / tableware.

[0062] Builders suitable for use in detergent and cleaning compositions herein include builder which forms water-soluble hardness ion complexes (sequestering builder) such as polycarboxylic acids, e.g. citric acid or citrates, and builder which forms hardness precipitates (precipitating builder) such as carbonates, e.g. sodium carbonate. The alkali metal non-phosphate detergent builder salts include sodium or potassium carbonate, sodium or potassium citrate, sodium or potassium nitrilotriacetate, and the like, wherein sodium carbonate and sodium citrate are preferred.

[0063] The builder component(s) is / are typically present at a level of from about 20 to about 90 wt.%, preferably from about 25 to about 85 wt.%, more preferred from about 30 to 80 wt.% by weight of the detergent composition (as the sum of the builder components). It can also be suitable that the ratio of sequestering builder to precipitating builder is from about 10:1 to about 1:2, preferably from about 8:1 to 1:1. Sodium carbonate is preferred to be present at a level of 10% to 60% in the detergent composition.

[0064] The preferred compositions herein comprise a pH-adjusting component selected from water-soluble alkaline inorganic salts and water-soluble organic or inorganic builders. The pH-adjusting components are selected so that when the detergent composition is dissolved in water at a concentration of 1 to 5 wt.%, the pH remains in the range from about 8 to 14, preferably 8,5 to about 13, and more preferably from about 9 to about 12 like e.g. from about 9,5 to about 11,5. It is particularly preferred that the pH of a solution of the ADD composition of 1 % in water has a pH of at least 8, more preferably of at least 9. The preferred non-phosphate pH-adjusting component(s) of the invention (partially also representing builder components) is / are selected from the group consisting of: (i) sodium carbonate (also from sodium percarbonate) or sesquicarbonate; (ii) sodium silicate, preferably hydrous sodium silicate having SiOz:NazO ratio of from about 1:1 to about 2:1, and mixtures thereof with limited quantities of sodium metasilicate; (iii) sodium or potassium citrate; (iv) citric acid; (v) sodium or potassium bicarbonate; (vi) sodium or potassium hydroxide (vii) L-glutamic acid N,N-diacetic acid (GLDA) or methyl glycine diacetic acid (MGDA), tetrasodium salt, and (viii) mixtures of (i)-(vii).

[0065] Preferred embodiments contain low levels of silicate (i.e. from about 0.1% to about 5% SiO 2 ) or no silicate.

[0066] For compositions herein having a pH between about 8 and about 14 of the initial wash solution, particularly preferred non-phosphate ADD embodiments comprise independently, by weight of the ADD composition, from about 5% to about 50%, preferably from about 10% to about 45%, most preferably from about 15% to about 40%, of sodium citrate; from about 5% to about 60%, preferably from about 8% to 50%, most preferably from about 10% to about 40% sodium carbonate; from about 5% to about 38%, preferably from about 10% to about 34%, most preferably from about 15% to about 30%, of GLDA or MGDA, tetrasodium salt; and - if present - from about 2% to about 30%, from about 3% to 20%, most preferably from about 4% to about 15% of any of the other builders mentioned above or below. A combination of sodium citrate and sodium carbonate is particularly preferred, thus, it is preferred that at least these two compounds are comprised in the builder system of the ADD composition of the invention.

[0067] The builder system can be complemented (i.e. for improved sequestration in hard water) by other optional detergency builder salts selected from non-phosphate detergency builders known in the art, which include the various water-soluble, alkali metal or ammonium polycarboxylates. Preferred are the alkali metal, especially sodium, salts of such materials. Alternate water-soluble, non-phosphorus organic builders can be used for their sequestering properties. Examples of polycarboxylate builders are the sodium, potassium, lithium, ammonium salts of glutamate diacetate (GLDA), ethylenediamine-N,N'-disuccinic acid (EDDS), iminodisuccinic acid (IDS), aspartic acid diacetic acid (ASDA), methylglycinediacetic acid (MGDA), carboxymethyl starch (CMS), carboxymethyl inulin (CMI), carboxymethyl cellulose (CMC) and poly aspartic acid (PASA).

[0068] Silicate is not preferred as a builder. However, if present, sodium and potassium, especially sodium, silicates can be used. A suitable alkali metal silicate is a granular hydrous sodium silicate having a SiO 2 :Na 2 O ratio of about 2.0 or about 2.4 available from PQ Corporation, named Britesil H20 and Britesil H24. If present, preferred is a granular hydrous sodium silicate having a SiO 2 :Na 2 O ratio of 2.0. Typical forms, i.e., powder and granular, of hydrous silicate particles are suitable.

[0069] Alternate silicate-containing materials might include zeolites, such as zeolites A and P, including "maximum aluminium" variants; or layer silicates such as SKS-6, a wide variety of such silicates are available from Hoechst Corp. or from PQ Corp. When used in the instant compositions for pH-adjusting, aluminium anticorrosion or surfactant-absorbing effects, the levels of any limited water-solubility silicates should not be such as to result in deposition on dishware. Preferably the ADD composition of the present invention is substantially free from zeolite(s).OTHER SURFACTANTS

[0070] The detergent composition may include one or more further surfactants in addition to component (d). Any of anionic, cationic, gemini surfactants, amphoteric or zwitterionic surfactants or suitable mixtures thereof may plausibly be used. Many such suitable surfactants are described in Kirk Othmer's Encyclopedia of Chemical Technology, 3rd Ed., Vol. 22, pp. 360-379, "Surfactants and Detersive Systems", incorporated by reference herein. In general, bleach-stable surfactants are preferred according to the present invention.

[0071] For ADD compositions, it is preferred to minimize the amount of anionic surfactant. Accordingly, preferably an ADD composition comprises not more than 2 wt.%, not more than 1 wt.%, less than 0.5 wt.% or preferably no anionic surfactant.

[0072] Suitable cationic surfactants include alkyl pyridinium compounds, alkyl quaternary ammonium compounds, alkyl quaternary phosphonium compounds, alkyl ternary sulphonium compounds, and mixtures thereof.

[0073] Cationic surfactants can be quaternary ammonium compounds having the general formula:         (R)(R 1 )(R 2 )(R 3 )N +< X -< wherein, R is a linear or branched, substituted or unsubstituted C 6-18 alkyl or alkenyl moiety, R 1 and R 2 are independently selected from methyl or ethyl moieties, R 3 is a hydroxyl, hydroxymethyl or a hydroxyethyl moiety, X is an anion which provides charge neutrality, preferred anions include: halides, preferably chloride; sulphate; and sulphonate.

[0074] Suitable zwitterionic or amphoteric surfactants include amine oxides and / or betaines.

[0075] The content of the "other" (non-nonionic) surfactants can be in the range of from 0.2 to 10 wt.%, like from 0.5 to 8 wt.% or from 0.8 to 5 wt.% of any of the surfactants, but sum up to a total amount of from 0.2 to less than 20 wt.%, preferably 0.5 to 15 wt.% or even 1 to 10 wt.%, if present.COMPLEXING AGENTS

[0076] The composition may further comprise at least one monomeric complexing agent, preferably an, according to the OECD guidelines (status April 2022) readily or inherently, biodegradable complexing agent, in a total amount of up to 6 wt.%, like 0.2 to 5 wt.% or 0.5 to 4 wt.%.

[0077] A "complexing agent" is a compound capable of binding polyvalent ions such as calcium, magnesium, lead, copper, zinc, cadmium, mercury, manganese, iron, aluminium, silver, cobalt, chromium, nickel and other cationic polyvalent ions to form a water-soluble complex.

[0078] If not already used as a (co)builder, methyl-glycine-diacetic acid (MGDA), its salts and derivatives thereof, or glutamic-N,N- diacetic acid (GLDA), its salts and derivatives thereof, can be added in amounts as cited above as a complexing agent. Further, said monomeric complexing agent can be selected from iminodisuccinic acid (IDS), its salts and derivatives thereof, aspartic acid diacetic acid (ASDA), its salts and derivatives thereof, dipicolinic acid (DPA), its salts and derivatives thereof, ethylenediamine-N,N'-disuccinic acid (EDDS), its salts and derivatives thereof, and mixtures of the mentioned. A preferred complexing agent for use herein is MGDA and salts thereof, especially preferred for use herein is the three sodium salt of MGDA. Another preferred complexing agent for use herein is GLDA and salts thereof, preferred for use herein is the three sodium salt of GLDA, more preferred is the four sodium salt of GLDA.

[0079] However, MGDA-containing formulations may display a yellow discoloration and a distinct ammonia smell after storage and therefore often contain further additives or ingredients to mitigate the detrimental effects of MGDA degradation. Strong aminocarboxylate chelating ligands may also decrease the in-wash stability of other metal-containing formula ingredients. For example, MGDA is capable to extract the central metal ion(s) from metal ion complexes commonly used in ADW formulations. To devoid an influence of MGDA on the iron based bleach catalyst (a), a low content, preferably the absence of MGDA may have certain beneficial effects in the present invention. In a preferred embodiment the composition comprises MGDA in an amount of less than 3 wt.%, less than 2 wt.%, less than 1 wt.% or is free of MGDA.

[0080] In a very preferred embodiment, complexing agent does not comprise ethylenediaminetetraacetic acid (EDTA) or its derivates.

[0081] According to the invention the detergent composition has a low phosphonate(s) content, i.e. in a total amount of less than 3 wt.% of the detergent composition. In particular, "phosphonates" according to the present disclosure comprise aminopolyphosphonates or bisphosphonates.

[0082] Aminopolyphosphonates comprise aminotris(methylenephosphonic acid) (ATMP), hydroxyethylamino bis(methylene phosphonic acid) (HEMPA), ethylenediamine tetra(methylene phosphonic acid) (EDTMP), hexamethylenediamine-tetra(methylene phosphonic) acid (HDTMP), polyamino polyether methylene phosphonic acid (PAPEMP), bis(hexamethylene triamine penta(methylenephosphonic acid)) (BHMTMP), DTPMP (diethylenetriamine penta(methylene phosphonic acid) (DTPMP), lysine tetra(methylene phosphonates) (LTMP).

[0083] Bisphosphonates are e.g. 1-hydroxyethane 1,1-diphosphonic acid (HEDP), also known as 1-hydroxyethylidine 1,1-diphosphonic acid in a neutral or partially neutralized form.

[0084] It is preferred that phosphonates are present in the detergent composition of the present invention in a total amount of less than 3 wt.%, preferably less than 2 wt.%, even more preferred less than 1 wt.%, even more preferred less than 0.5 wt.% referring to the weight of the total weight of the composition. This should be understood in a way, that any of the mentioned phosphonates can be present in an amount of less than 3 wt.%, but if more than one phosphonate is present, the total amount of said phosphonates does not summarize and does not exceed the "less than 3 wt.%". In a particularly preferred embodiment, the detergent composition comprises no phosphonate(s).ENZYMES

[0085] The composition may include one or more enzymes. For ADDs it is preferred that the one or more enzymes are selected from proteases, lipases, amylases, cellulases and peroxidases, with proteases and amylases being preferred, most preferred are proteases and alpha-amylases. It is most preferred that protease and / or amylase enzymes are included in the compositions according to the invention as such enzymes are especially effective in ADD compositions. More than one species may be used. The enzymes can for example be used as a (optionally coated) granulate and / or a liquid in commonly used amounts.

[0086] Each of the enzymes can be present in an amount of from 0.1 to 10 wt.%, such as from 0.5 to 8 wt.% or 1 to 6 wt.% of the detergent composition. The total quantity of active enzyme(s) is preferably from 0.05 to 4 wt.%, such as from 0.1 to 2 wt.% or 0.2 to 1.5 wt.% of the detergent composition.DYES

[0087] Dyes may be used to color the detergent composition, parts of the composition, or provide speckles in the composition to render it more attractive to the consumer.PERFUME

[0088] Perfume can be added to improve the sensorial properties of the composition or of the target surface after cleaning, such as the load of a dishwashing or laundry machine. Also perfumes that have a deodorizing effect can be applied.ANTI-CORROSION AGENTS

[0089] The main function of anti-corrosion agents is to minimize the amount of material damage caused on glass, metal and metal alloy, as well as the colors of and prints or decorations on items present in the dishwasher, during automatic dishwashing.

[0090] The types of anti-corrosion agents that commonly are used in detergent compositions include, but are not limited to, triazole-based compounds (like tolyltriazole and 1,2,3-benzotriazole), polymers with an affinity to attach to glass or metal surfaces, strong oxidizers (like permanganate), cystine, silicates, metal oxides, organic or inorganic metal salts, or metal salts of biopolymers.

[0091] The metal of these metal salts can be selected from the group aluminium, strontium, barium, titanium, zirconium, manganese, lanthanum, bismuth and zinc, wherein the latter two are most commonly applied as anti-corrosion agents. Of the group of metal oxides is zinc oxide commonly applied for the prevention of glasscorrosion which can occur on items during machine dishwashing. Preferred for the use of anti-corrosion agents are bismuth citrate, zinc oxide, zinc sulphate, zinc hydroxy carbonate and zinc stearate. Most preferred is the use of bismuth citrate as an anti-corrosion agent in an ADD composition.

[0092] The preferred composition contains zinc salts or oxides, or bismuth salts, or any combination of these. Another preferred composition contains bismuth salts and is free of zinc salts or oxides. Another preferred composition is free of zinc salts or oxides.PROCESS AIDS

[0093] Process aids can be added for example to optimize compressibility, friability, toughness, elasticity, disintegration speed, hygroscopicity, density, free flowing properties, stickiness, viscosity, rheology of a detergent composition in a certain physical shape.FREE OF

[0094] The ADD composition of the present invention preferably is substantially free of the following compounds (considered independent from each other, but preferably none of these compounds is contained): Sodium tripolyphosphate Zeolite Anionic surfactants Cationic surfactants Hueing agents Soil release polymers, including copolymers of polyethylenterephtalate and polyoxyethylenterephtalate. Dye transfer inhibitors, including polymers comprising polyvinylpyrrolidone (PVP) and / or polyvinylimidazole (PVI) Optical brighteners, including stilbene derivates Lipase Mannanase EDTA (ethylenediaminetetraacetic acid or one of its salts) Manganese bleach catalysts, e.g MnTACN Phosphonate Sulfite and / or bisulfite salts

[0095] During the complete washing cycle in the dishwasher, that starts with an optional pre-wash step and ends with the drying step, no ultraviolet radiation is present.Figures:

[0096] FIG. 1 shows as an example of the structure of the iron-based bleach catalyst (a), wherein the ligand is of formula (1).Examples:

[0097] The following Examples show that adding a Fe-based bleach catalyst according to the present invention to an ADD composition results in a noticeable effect on difficult stain removal on dishes (tea stain).

[0098] In example 1 and 2 a cleaning test has been performed that is based on the recommendations of the IKW that was published as "Recommendations for the Quality Assessment of the Cleaning Performance of Dishwasher Detergents (Part B, Update 2015)" in edition 6 / 2016 of the SOFW Journal.

[0099] For both tests the seven standard soils (tea, milk skin, starch mix, pasta, egg yolk, crème brûlée and minced meat) have been prepared and have been washed, in presence of a ballast soil, in a dishwasher. The cleanliness level of the standard soils is assessed in accordance with the mentioned recommendations.Example 1:Additional test conditions:

[0100] This cleaning performance test has been performed according to the mentioned recommendation. The detergent is dosed as a powder in the dosing chamber of a Miele GSL2 dishwasher. The test is performed at the "45°C R-time: 8 min"-program with water of 21°GH. Only the cleanliness level of the tea soil is assessed.Detergent:

[0101] Table IBase detergent composition 1 g / dose Trisodiumcitrat dihydrat6,5Sodium carbonate5,8Sodium percarbonate5,0Co-builders1,0Modified fatty alcohol ethoxylate0,7Enzymes (protease and amylase)1,0Process aids (tableting aid, disintegrant, solvent, etc.)0,5Dish protecting agentspos.sum20,5

[0102] The Base detergent composition 1 has a dose of 20.5 gram per wash cycle, and is combined with given amounts of the bleach catalyst FeONIX A (iron-based bleach catalyst, wherein the ligand is of Formula (2)) and the bleach activator TAED (as a 92% active granulate) by dosing the required amounts on top of the dose of the Base detergent composition 1.Results:

[0103] Table II: cleaning results tea soilTAED (92% active)4505,27,3(mg / dose)2256,701,54,56,202040FeONIX-A (mg / dose)

[0104] As can be seen in table II the results clearly show that the addition of FeONIX-A to the base composition clearly increases the obtainable cleaning performance. The addition of a bleach activator can further support the obtainable result.Example 2:Additional test conditions:

[0105] This cleaning performance test has been performed according to the mentioned recommendation. The detergent is dosed as a powder in the dosing chamber of a Bosch Series 6 (SMS6ECW57E) dishwasher, wherein the optical sensor for measuring turbidity has been bypassed to ensure equal washing cycles each time. The cleaning test is performed at the "Express 45°C"-program with water of 21°GH. Only the cleanliness level of the tea soil is assessed.Detergent:

[0106] Table IIIBase composition 2 (g / dose) Trisodiumcitrat dihydrat7Sodium (bi) carbonate salts5,5Sodium percarbonate5,0Co-builders1,5Modified fatty alcohol ethoxylate0,5Enzymes (protease and amylase)0,5Process aids (tableting aid, disintegrant, solvent, etc.)0,5Dish protecting agentspos.Dye, Perfume, etc.pos.sum20,5

[0107] The Base detergent composition 2 was added as a dose of 20.5 gram per wash cycle, and was combined with given amounts of the bleach catalyst FeONIX A and the bleach activator TAED (as a 92% active granulate) by dosing the required amounts on top of the dose of the Base detergent composition 2.Results:

[0108] Table IV: cleaning results tea soilTAED (92% active)0,453,18,4(gram / dose)01,86,900,04FeONIX-A (gram / dose)

[0109] It can be seen that the addition of FeONIX-A to the ADD composition gives a significant performance increase on the soil removal of tea. Adding TAED on-top of the amount of FeONIX-A further improves the performance on soil removal on tea.Example 3:Test conditions:

[0110] This cleaning test has been performed, based on the recommendations of the IKW that was published as "Recommendations for the Quality Assessment of the Cleaning Performance of Dishwasher Detergents (Part B, Update 2015)" in edition 6 / 2016 of the SOFW Journal.

[0111] The standard soil black tea in cups has been prepared and has been washed, in presence of a ballast soil, in a dishwasher. Assessing the cleanliness level of the tea soil after washing is done in accordance with the mentioned recommendations.

[0112] The detergent was dosed as a powder, in the dosing chamber of a Bosch Series 6 (SMS6ECW57E) dishwasher. In this dishwasher the optical sensor, for measuring turbidity, has been bypassed to ensure equal washing cycles each time. The cleaning test was performed at the Express 45°C program with water of 21°GH. After cleaning the tea left behind in the cups after cleaning was visually assessed according to the 'recommendations'.Detergent:

[0113] Table V:Base composition 3 (g / dose) Trisodiumcitrat dihydrat7,0Sodium (bi) carbonate salts5,5Sodium percarbonate5,0Co-builders1,5Modified fatty alcohol ethoxylate0,5Enzymes (protease and amylase)0,5Process aids (tableting aid, disintegrant, solvent, etc.)0,5Dish protecting agentspos.Dye, Perfume, etc.pos.sum20,5

[0114] The Base detergent composition 3 had a dose of 20,5 gram per wash cycle, and was combined with given amounts of the bleach catalyst FeONIX A and the bleach activator TAED (as a 92% active granulate) by dosing the required amounts on top of the dose of the Base detergent composition 3.Results:

[0115] Table VI: cleaning results tea soilTAED0,454,08,0(gram / dose)0x7,200,04FeONIX-A (gram / dose)

[0116] It can be seen that the addition of FeONIX-A to the ADD composition gives also here a significant performance increase on the soil removal of tea. Adding TAED on-top of the amount of FeONIX-A further improves the performance on soil removal on tea.Example 4:

[0117] The effect of addition of an oxygen-source (H 2 O 2 ) bleach component is considered.Test conditions:

[0118] This test was performed in a dishwasher where melamine plates and porcelain cups, both soiled with tea, were cleaned with an ADD detergent in the presence of a ballast-soil.

[0119] During each washing cycle, the tea-cups and tea-plates were washed with a detergent and a ballast soil, in a dishwasher that contains a ballast load. Dishwasher:Miele GSL2Programm:45°C, with R-Zeit 2 (8 minutes)

[0120] Ballast soil & tea cups are conform to the "Recommendations for the Quality Assessment of the Cleaning Performance of Dishwasher Detergents (Part B, Update 2015)" Tea-plates:CFT-DM11Water hardness:21°GHDetergent:according to Table VII

[0121] The ballast load in the dishwasher consists of several items of plastic, metal, glass and porcelain or earthenware.Measuring conditions:

[0122] After cleaning in the dishwasher, the tea-cups and the tea-plates were dried for at least 24 hours. The color difference, between before and after cleaning in the dishwasher, of the tea-plates was measured (in Lab-values) and expressed as delta E. After cleaning the tea-cups, the tea left behind in the cups after cleaning, was visually assessed in accordance with the 'recommendations'.Detergent:

[0123] Table VII:Base composition 4 g / dose Trisodiumcitrat dihydrat6,0Sodium carbonate6,0FeONIX-A0,020TAED (92% act.)0,450Co-builders1,5Modified fatty alkohol ethoxylate0,5Enzymes (protase and amylase)1,0Process aids (tabletting aid, disintegrant, solvent, etc.)0,5Dish protecting agentspos.sum16,0

[0124] Sodium percarbonate was dosed on-top of the Base detergent composition 4, in amounts of 3 gram, 4 gram and 5 gram per dose. The obtainable results are shown in table VIII.Results:

[0125] Table VIII:Sodium percarbonate (g / dose)Soil removal on tea cups CFT-DM11 (delta E)Soil removal on tea cups (visually judged)3,06,34,04,06,95,05,010,08,0

[0126] It is clearly to see that the addition of a H 2 O 2 source bleach component increases noticeable the cleaning performance of the detergent composition comprising an iron based bleach catalyst, wherein the ligand is a compound of Formula (2) and a bleach activator.

Claims

1. Automatic dishwashing detergent composition comprising (a) at least one iron-based bleach catalyst, wherein iron is the transition metal and the ligand is of formula (1) or (2), (b) at least one bleaching agent, providing hydrogen peroxide or oxygen, (c) optionally a bleach activator.

2. Detergent composition according to claim 1, wherein the composition comprises at least an iron-based bleach catalyst (a), wherein the ligand is according to Formula (2).

3. Detergent composition according to at least one of the preceding claims, wherein said bleach catalyst (a) is present in an amount of from (i) 1 to 500 milligram, or from 2 to 300 milligram, or from 3 to 150 milligram, preferably from 4 to 100 milligram, more preferably from 5 to 80 milligram, even more preferably from 5 to 60 milligram and most preferable from 10 to 60 milligram per standard dose of the ADD composition per wash, or (ii) 0.005 to 2.5 wt.%, or from 0.01 to 1.5 wt.%, or from 0.015 to 0.75 wt.%, preferably from 0.02 to 0.5 wt.%, more preferred from 0.025 to 0.4 wt.%, or even more preferred from 0.025 to 0.3 wt.% or most preferred from 0.05 to 0.3 wt.% of the ADD composition, respectively.

4. Detergent composition according to any of the preceding claims, wherein the bleaching agent (b) is selected from organic peracids or inorganic peroxides, preferably the organic peracids are selected from perbenzoic acid and peroxycarboxylic acids and / or the inorganic peroxides include percarbonates, perborates, persulphates, hydrogen peroxide and derivatives and salts thereof.

5. Detergent composition according to at least one of the preceding claims, comprising at least sodium percarbonate as bleaching agent (b).

6. Detergent composition according to at least one of the preceding claims, comprising a total amount of bleaching agent (b) of from 1 to 80 wt.% or from 1.5 to 70 wt.%, or from 2 to 60 wt.% , wherein preferably (i) the inorganic peroxides, is / are present in a total amount of from 5 to 80 wt.%, or from 10 to 80 wt. %, or from 10 to 70 wt.%, or from 10 to 60 wt. %, or from 10 to 50 wt.%, or from 10 to 40 wt.%, or from 10 to 35 wt.%, or from 10 to 30 wt.% in the detergent composition and / or (ii) the organic peracids, is / are present in a total amount of from 1 to 20 wt.%, or from 1 to 15 wt.%, or from 1.5 to 15 wt.%, or from 1.5 to 10 wt.%, or from 2 to 10 wt.%, or from 2 to 7.5 wt.%, or from 2.5 to 7.5 wt.%, or from 2.5 to 6 wt.% in the detergent composition.

7. Detergent composition according to at least one of the preceding claims, comprising TAED (tetraacetylethylenediamine), NOBS (sodium-para-nonanoyloxybenzenesulfonate), LOBS (sodium-para-dodecanoyloxybenzenesulfonate), DOBA (decanoyloxybenzoic acid), DECOBS (decanoic acid,2-[[(4-sulfophenoxy)carbonyl]oxy]ethyl ester, sodium salt), nitrilquats or alkyl oxybenzene sulphonate, preferably at least TAED as a bleaching activator (c).

8. Detergent composition according to at least one of the preceding claims, wherein a bleach activator (c) is present in a total amount of (i) from 0.05 to 3 gram, or from 0.1 to 2 gram, or from 0.1 to 1.5 gram, or from 0.1 to 1.25 gram, or from 0.1 to 1 gram, or from 0.2 to 0.75 gram per standard dose of the detergent composition per wash, or (ii) 0.1 to 15 wt.%, or from 0.3 to 15 wt.%, or from 0.3 to 12 wt.%, or from 0.3 to 9 wt.%, or from 0.5 to 7 wt.%, or from 0.75 to 7 wt.%, or from 1 to 7 wt.%, or from 1 to 6 wt.%, or from 1 to 5 wt.% of the detergent composition, respectively.

9. Detergent composition according to any of the preceding claims, wherein the composition comprises as an additional component (d) at least one type of a nonionic surfactant, preferably (i) in a total amount of from 0.05 to 4 gram, such as from 0.05 to 2 gram, from 0.05 to 1.5 gram, from 0.1 to 1.5 gram, from 0.1 to 1.25 gram, from 0.2 to 1.25 gram, or from 0.2 to 1 gram of one or more nonionic surfactants per standard dose of the detergent, or (ii) in a total amount of from 0.2 to 15 wt.%, such as from 0.5 to 10 wt.%, from 0.8 to 10 wt.%, from 0.8 to 8 wt.%, from 1 to 7 wt.%, from 1.2 to 6 wt.%, or from 1.5 to 5 wt.%, or from 1.8 to 5 wt.% or 2 to 4 wt.%, respectively.

10. Detergent composition according to at least one of the preceding claims, wherein composition comprises at least one builder, selected from polycarboxylic acid(s) and carbonate(s), preferably a combination of a polycarboxylic acid and a carbonate.

11. Detergent composition according to at least one of the preceding claims, wherein the composition is substantially free of any one of the following compounds, preferably is free of all of the following compounds: - Anionic surfactants - Phosphate - Zeolite - Anionic surfactants - Hueing agents - Soil release polymers - Dye transfer inhibitors - Optical brighteners - Lipase - Mannanase - EDTA - Manganese bleach catalysts, e.g MnTACN - Phosphonate - Sulfite and / or bisulfite salts12. Detergent composition according to at least one of the preceding claims, wherein the composition is provided as a powder, a gel, paste, liquid, granulate, compacted granulate or in unit dose form, wherein said unit dose form includes pressed tablets and water-soluble packages, preferably at least a part of the composition is in solid form, most preferred the composition is in solid form.

13. Detergent composition according to at least one of the preceding claims, wherein a 1% solution of the composition in water results in a pH in the range from about from about 8 to 14, preferably 8,5 to about 13, and more preferably from about 9 to about 12, like from about 9,5 to about 11,5..

14. A unit dose of an ADD composition of any of the preceding claims, wherein the unit comprises from 5 to 50 g, preferably from 5 to 40 g, more preferred from 5 to 30 or from 5 to 25 g per unit.

15. Detergent composition according to at least one of the preceding claims, wherein the composition comprises at least - a an iron-based bleach catalyst having iron as a transition metal and a ligand according to Formula (2) as a bleach catalyst (a), - sodium percarbonate as a bleaching agent (b), - TAED as a bleach activator (c), - at least an optionally modified fatty alcohol ethoxylate as a nonionic surfactant (d) - and a combination of citrate salt and sodium carbonate as a builder system.

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