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Process for producing detergent granules, detergent granules and detergent compositions comprising said granules

A detergent particle and composition technology, applied in detergent composition, organic detergent composition, inorganic/elemental detergent composition, etc., can solve problems such as low bulk density, difficult handling and storage, high packaging cost, etc.

Active Publication Date: 2018-08-07
UNILEVER IP HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The resulting highly anionic detergent powders typically have low bulk density and are difficult to handle and store with high packaging costs

Method used

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  • Process for producing detergent granules, detergent granules and detergent compositions comprising said granules
  • Process for producing detergent granules, detergent granules and detergent compositions comprising said granules
  • Process for producing detergent granules, detergent granules and detergent compositions comprising said granules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] The aqueous slurry was prepared in an agitated mixer equipped with a direct steam coil to heat the material. 2,500 kg of slurry was prepared involving the following steps.

[0090] A feed consisting of clean water (610 kg) and 50% pure caustic soda solution (206 kg) was dosed to the mixer and heated to a temperature of 40-40°C. Following this step, pre-weighed amounts (774 kg) of commercial grade alkylbenzenesulfonic acid were gradually dosed under continuous stirring over a period of 3-4 minutes to form a neutralized paste. An additional 2 minutes was allowed to ensure complete neutralization. The preheated alkali silicate (179 kg) and copolymer (121 kg) were pumped into the mixer at increased stirring speed to improve the fluidity of the total mass. At this stage, the temperature may preferably be maintained at 75-80°C by using steam in an open coil. After this step, the steam valve was closed and sodium sulfate (212 kg) / sodium carbonate (378 kg) was dosed via scre...

Embodiment 2

[0097] The base powders of Example 1 were also checked for the presence of a crystalline phase. The d-values ​​of the diffraction lines of the samples were obtained using a D8 Discover machine from Bruker-AXS and the crystalline compounds were identified from them.

[0098] Materials and methods

[0099]

[0100] The results are given in the table below:

[0101] Presence of crystalline compounds in base powder

[0102]

[0103] "+" indicates the presence of crystalline compound

[0104] "-" indicates that the crystalline compound, if present, is below the detection limit of the XRD method used.

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Abstract

The present invention provides a process for the preparation of detergent granules comprising at least 40 wt% of anionic surfactant and suitable for use as a granular detergent composition or a component thereof, the process comprising the steps of: (i ) Neutralize the anionic surfactant precursor with an alkali source, (ii) add Na2SO4 and Na2CO3 to form a slurry and (iii) spray dry the resulting slurry to form granules, wherein the molar ratio of Na2SO4 to Na2CO3 is: 1:3.3 ≤ molar ratio < 1:1.3, and wherein the double salt Na2SO4.Na2CO3 is formed, and wherein the slurry comprises a polycarboxylate polymer. There is also provided a spray-dried detergent carrier particle obtainable by the process of the present invention, comprising at least 40 wt% of anionic surfactant and suitable for use as a granular detergent composition or component thereof, said particle comprising ( i) Linear alkylbenzene sulfonates (LAS), soaps and mixtures thereof, and (ii) double salts Na2SO4.Na2CO3. A third aspect is a detergent composition comprising such particles.

Description

field of invention [0001] The present invention relates to the field of detergent powders, in particular laundry detergent powders, and their production. More particularly, the present invention relates in a first aspect to a process for the production of detergent granules comprising at least 40 wt% of anionic surfactant and suitable for use as a granular detergent composition or a component thereof. In a second aspect, the present invention relates to detergent granules comprising at least 40 wt% of anionic surfactant and obtainable by said process. In a third aspect, the invention relates to detergent compositions comprising such particles. Background of the invention [0002] The present invention relates to the production of detergent granules comprising a surfactant system which imparts effective cleaning. In particular, the invention relates to a method of producing such particles by spray drying an aqueous slurry. [0003] The preparation of granular detergent pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11D3/04C11D3/10C11D3/37C11D11/02
CPCC11D3/046C11D3/10C11D3/3761C11D11/02
Inventor R.登阿德F.E.帕查
Owner UNILEVER IP HLDG BV