76 results about "Tetraacetylethylenediamine" patented technology

The invention provides a peroxyacetic acid generator which consists of acetylsalicylic acid, tetraacetylethylenediamine, sodium percarbonate, a surfactant, a corrosion inhibitor and a pH regulator at a mass ratio of 1:(1.5-2.0):(3.5-5):(0.02-0.05):(0.1-0.3):(3-6). Meanwhile, the invention also discloses a preparation method of the peroxyacetic acid. Through the invention, by adding the pH regulator, the pH value of the mixed solution is stabilized at about 7-8, and then the prepared peroxyacetic acid solution has higher stability and lower corrosivity.

Waste in a black or gray water holding tank is treated by an oxygen activated biocide by the addition of tetra acetyl ethylene diamine (TAED) and a peroxygen compound. Hydrogen peroxide and/or peracetic acid are released over a period of time and thus maintained in the wastewater solution. Peracetic acid under controlled release conditions dissipates prior to the wastewater being deposited in a wastewater treatment plant.

The invention discloses a decoloration method of colored cashmere loose fiber, which comprises the following steps of: A, degreasing by use of a solution containing 4-5wt% of degreasing agent, 5-7wt% of formaldehyde, 1-5wt% of sodium carbonate and the balance of water; B, performing oxidation bleaching by use of a solution containing 1-2wt% of cashmere caring agent, 1.5-2wt% of tetraacetylethylenediamine, 20-30wt% of hydrogen peroxide, 10-15wt% of sodium chloride and the balance of water; C, flushing with deionized water; D, performing reduction and oxidation by use of a solution containing 0.5-1wt% of fluorescent whitening agent, 1-2wt% of cashmere caring agent, 2-5wt% of sodium hydrosulfite, 1-3wt% of ferrous sulfate, 10-15wt% of ferrous sulfate and the balance of water; E, performing oxygen washing by use of a solution containing 1-2wt% of hydrogen peroxide, 0.5-1wt% of ammonia water and the balance of water; and F, drying. The method disclosed by the invention can improve the whiteness of the bleached cashmere and reduce the yellowing degree of cashmere after longtime use.

The invention discloses a tableware detergent for dishwashers, wherein the tableware detergent comprises a powder detergent and a liquid detergent according to a mass ratio of (6-12):1, wherein the powder detergent comprises, by mass, 20-50 parts of an alkaline auxiliary agent, 10-40 parts of sodium percarbonate, 2-8 parts of tetraacetylethylenediamine, 1-4 parts of a nonionic surfactant, 1-3 parts of a biological enzyme preparation, 10-20 parts of sodium citrate, 1-8 parts of a chelating agent, and 2-10 parts of an organosilicon antifoaming agent, and the liquid detergent comprises, by weight, 25-50 parts of a solvent, 40-60 parts of a surfactant, 3-8.5 parts of a neutralizing agent, and 3-10 parts of water. According to the present invention, by adjusting the formula and the ratio of the powder detergent and the liquid detergent and controlling the foam amount during the use, the tableware detergent is suitable for dishwashers, solves the problem of too foam amount of the existing detergent, and has characteristics of strong detergency, strong wettability and good washing effect.

The invention discloses a method for extracting celluloses, hemicelluloses and lignins from pennisetum hydridum. The method includes: (1) adding benzene-alcohol mixed liquid into the pennisetum hydridum to realize dewaxing, adding water into dewaxed pennisetum hydridum, extracting, filtering, and drying to obtain pretreated pennisetum hydridum; (2) sequentially adding NaOH-H2O2 mixed solution and tetraacetylethylenediamine into the pretreated pennisetum hydridum, treating for 1-4h at the temperature of 55-95 DEG C, filtering, and drying filter residues to obtain the celluloses; (3) adjusting a pH value of filtrate with the celluloses extracted to 5.0-5.5, adding ethyl alcohol to realize precipitation of hemicelluloses, and centrifugally separating to obtain the hemicelluloses; (4) recovering the ethyl alcohol in supernatant obtained after centrifugal separation at the step (3), adjusting a pH value of raffinate with ethyl alcohol recovered to 1.5-2.5, and centrifugally separating to obtain the lignins. By adoption of the method, the celluloses, the hemicelluloses and the lignins can be sequentially and effectively extracted in the same process, high extraction rate is realized, and high-value utilization of wood fibers in the pennisetum hydridum is improved.

A detergent composition adapted to clean paper making equipment without the use of chlorinated compounds includes a phosphate sequesterant system, a non-foaming nonionic surfactant, a polyacrylic acid detergent polymer and, as a bleaching source, a combination of a peroxy compound and tetraacetylethylenediamine. Suitable peroxy compounds include sodium percarbonate, sodium perborate, and sodium persulfate. This composition, when added to water and circulated through paper making equipment effectively cleans the equipment, removing pitch and other stickies as well as dirts, greases, and the like.

The invention discloses a foamless detergent, which includes: sodium alginate, starch, sodium silicate, citric acid, sodium citrate, sea salt, sodium perborate, tetraacetylethylenediamine and borax, and also includes: sodium bicarbonate and soapnut saponin. The preparation method comprises the steps of: mixing sodium silicate with sodium perborate, mixing sapindus saponin, sodium alginate, starch, citric acid, sodium citrate, sea salt, sodium bicarbonate, tetraacetylethylenediamine and borax, then mixing the two mixtures, adding citric acid and conducting mixing again. The detergent has the characteristics of compatible raw materials, good water solubility, strong activity under a low temperature condition, high detergency, complete stain removal ability, and no foam or odor, and the water discharged after washing can be effectively biodegradable. The washing process has no harm to fabrics and human skin, Staphylococcus aureus, Escherichia coli, Candida albicans and the like can be effectively inhibited, odor can be eliminated, water and power can be saved, the foamless detergent is in line with energy-saving and emission reduction, environmental protection and low carbon.

The invention discloses a combined treatment method for two kinds of waste acid water generated in tetraacetylethylenediamine (TAED) production. The combined treatment method is characterized by comprising the following steps of: evaporating dark acid water generated after washing TAED crystals by using live steam; carrying out multi-effect concentration on decolored neutralized liquid by using the acid steam generated by evaporation as a heat source; cooling and crystallizing; and separating solid from liquid to obtain sodium acetate trihydrate which is a by-product, wherein the live steam can be generated by burning residues for recycling after the dark acid water is evaporated, The decolored neutralized liquid is generated by the method that after the acid steam is subjected to heat exchange, the acid steam is condensed into colorless acid water; then the colorless acid water is mixed with light acid water generated by high-temperature dewatering after acetic acid and ethanediaminereact in the production of the TAED; alkali is added to the mixed liquid for neutralization; and then the mixed liquid is decolored by using thiourea dioxide. According to the combined treatment method, the acid steam of the dark acid water is used as a primary heat source for carrying out the multi-effect concentration on the mixed liquid of the mixed acid, therefore, energy can be greatly saved, and environment friendliness is facilitated; and the thiourea dioxide is used as a decoloring agent, the complication of solid and liquid separation and the generation of solid waste residues, whichare brought by decoloring solid adsorptive substances such as activated carbon, are also avoided.

The invention discloses a novel bleaching agent for textile pretreatment. The novel bleaching agent is prepared by the following components in parts by weight: 20 to 40 parts of hydrogen peroxide, and 2 to 6 parts of potassium borate; 2 to 5 parts of ethylene diamine tetra sodium; 3 to 5 parts of sodium tripolyphosphate, 10 to 15 parts of acetic acid, 1 to 4 parts of magnesium chloride, 3 to 5 parts of tetraacetylethylenediamine, 2 to 6 parts of sodium silicate, 0.5 to 1.3 parts of sodium hydroxyethyl sulfonate, 10 to 18 parts of sodium percarbonate, 8 to 15 parts of sodium pyrophosphate, 10 to 20 parts of hexamethylenetetramine, and 100 to 120 parts of water. The novel bleaching agent has the advantages that the safety and non-toxic effects are realized, and the bleaching effect is good; at the premise of realizing good bleaching effect, the bleaching temperature is lowered, the damage to a fabric is reduced, the novel bleaching agent is suitable for bleaching the dirt of various fabrics, and the manufacturing cost is low.

The invention discloses an antistatic cleaning agent for a carpet. The antistatic cleaning agent is prepared from the following components in part by weight: 15 to 25 parts of cationic water soluble acrylic copolymer, 8 to 10 parts of sodium bicarbonate, 4 to 5 parts of sodium tripolyphosphate, 30 to 40 parts of urea, 10 to 12 parts of sodium benzoate, 4 to 6 parts of tetraacetylethylenediamine, and 30 to 40 parts of cationic water. The antistatic cleaning agent for the carpet is convenient to use and strong in detergency; and after being cleaned by the cleaning agent, the carpet does not generate static electricity, so that dust cannot be adsorbed to the carpet easily.

The present invention provides a method for degrading dye wastewater by using a tetraacetylethylenediamine (TAED)/solid oxidant (SPS, SPC or SPB) catalytic oxidation system. The method comprises: adding a catalyst tetraacetylethylenediamine to dye wastewater to achieve the concentration of 0.5-2 g/L in the wastewater, adding any one oxidant (SPS, SPC or SPB) to achieve the concentration of 0.2-1 g/L in the wastewater, adjusting the pH value of the mixed solution to 9-10 with a sodium hydroxide solution, and carrying out a reaction on the mixed solution for 30 min at a temperature of 30-70 DEGC so as to achieve the decolorization degradation of the dye. According to the present invention, with the application of the TAED/solid oxidant catalytic oxidation system in the dye degradation treatment, the characteristics of high safety, high efficiency and environmental friendliness can be achieved; and the method can promote the degradation of the dye by using the inorganic salts and the surfactants in the wastewater, such that the operation cost is low, and the method is easy to perform.

The invention discloses a rust-removing oil-removing wax-removing additive and a preparation method thereof, and aims to solves the environmental pollution problem that the prior hydrochloric acid or sulfuric acid pickle generates a large amount of acid mist when cleaning corrosion and oxide scale on the surface of metal and generates a large amount of phosphor and COD when removing oil and wax. The additive comprises the following raw materials by weight: 10%-20% of modified oleic acid, 3%-13% of alkyl polyglucoside, 3%-13% of coconut oil fatty acid diethanol amide, 1%-10% of 65% ethanol, 2%-7% of tetraacetylethylenediamine and balance of water. The preparation method of the additive includes steps of dissolving the modified oleic acid by the ethanol, and uniformly mixing the ethanol solution, the alkyl polyglucoside, the coconut oil fatty acid diethanol amide, the tetraacetylethylenediamine and water. The additive can be used for removing rust, oil and wax on surface of metal.

Described are co-granules coated with cellulose ether and containing

• • b1) cyclic sulfonimine,
  • b2) bleach activator selected from the group consisting of tetraacetylethylenediamine, decanoyloxybenzoic acid or mixtures thereof, and
  • b3) cellulose ether as binder.

These co-granules can be produced by wet granulation and are very storage-stable.

The co-granules can be used in detergents and cleaning agents, which contain

• • (a) bleaching agent selected from the group consisting of perborate, percarbonate or mixtures thereof, and
  • (b) the co-granules coated with cellulose ether.

These detergents and cleaning agents contain highly active bleach activators and bleach catalysts and are characterized by high storage stability. The combination of components b1) and b2) and peroxygen compound a) leads to a pronounced disinfection effect even at low temperatures.

The detergents and cleaning agents can be used even at low temperatures and show a good washing performance.

A detergent additive comprising an active comprising one or both of tetraacetylethylenediamine, triacetylethylenediamine; and an interpolymer complex, the interpolymer complex comprising both a proton-accepting-(co)polymer and a proton-donating (co)polymer.

A detergent additive comprising an active, the active comprising one or both of tetraacetylethylenediamine or triacetylethylenediamine; and the reaction product of a compound that functions as a Michael donor and a compound that functions as a Michael acceptor; wherein, the compound that functions as a Michael donor is selected from the group consisting of acetoacetate esters, cyanoacetate esters and malonic acid esters; the compound that functions as a Michael acceptor is a multifunctional acrylate; and the weight percent of the tetraacetylethylenediamine in the detergent additive is 10 to 90 percent.

The invention discloses a titanium tube for a coil-tube heat exchanger. The titanium tube comprises a titanium tube body, and the titanium tube body is subject to passivating treatment. The passivating treatment comprises the following steps: (1) sequentially putting 1-2 parts by weight of polyoxyethylene ether, 0.7 part by weight of sodium molybdate, 0.6 part by weight of calcium borate, 1.1 parts by weight of tetraacetylethylenediamine, and 1.7 parts by weight of oleoyl amino acid sodium into 25 parts by weight of deionized water, and stirring uniformly; (2) then, sequentially putting 0.9 part by weight of silicate-calcium powder, 1.3 parts by weight of hydroxyethyl cellulose, 2.1 parts by weight of sulfated castor oil, 1.5 parts by weight of boric acid morpholine and 1.3 parts by weightof benzotriazole, and continuing to stir till all the substances are sufficiently and uniformly mixed, so as to obtain a passivating treatment solution; and (3) putting the titanium tube body in thepassivating treatment solution for 30 seconds' passivating treatment at 50 DEG C, and taking out the treated titanium tube body for drying. As the titanium tube body of the titanium tube disclosed bythe invention is subject to passivating treatment, the properties of the titanium tube body are good and the surface smoothness of the titanium tube body is high.

The invention discloses ultraviolet-proof automobile windshield washer fluid. The windshield washer fluid is prepared from the following raw materials in percentage by mass: 4.8%-6.2% of SPC (sodium percarbonate), 2.0%-5.0% of TAED (tetraacetylethylenediamine), 7.0%-9.0% of polyvinylpyrrolidone, 1.0%-3.0% of a cationic gemini surface active agent DHGS, 1.0%-5.0% of lauramidopropyl hydroxyl sulphobetaine, 17.0%-21.0% of propylene glycol monomethyl ether, 0.5%-3.0% of a light stabilizer, 1.0%-2.0% of nano titanium dioxide, 0.1%-0.8% of sodium citrate, 3.0%-8.0% of rosin amine polyoxyethylene ether, and the balance being deionized water. The windshield washer fluid provided by the invention has strong decontamination capability, can quickly and effectively remove shellac, greasy dirt, dust and other stains on automobile glass, and has excellent ultraviolet resistance.