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Structured detergent particles and granular detergent compositions comprising them

A technology for structured detergents and detergent granules, which is applied in detergent compositions, surface active detergent compositions, inorganic/elemental detergent compositions, etc., and can solve the limitation of total surfactant content or surfactant activity, etc. question

Active Publication Date: 2020-11-24
PROCTER & GAMBLE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the total surfactant content or surfactant activity of the LAS-based detergent granules so formed may be limited, i.e. limited to not more than 30%

Method used

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  • Structured detergent particles and granular detergent compositions comprising them
  • Structured detergent particles and granular detergent compositions comprising them
  • Structured detergent particles and granular detergent compositions comprising them

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Example 1: Showing the percentage of oversized particles produced using sodium tripolyphosphate (STPP) or sodium carbonate comparison test

[0087] 1.1. WO9804670 discloses in Example VIII a granular detergent composition comprising about 30% HLAS, 36% sodium carbonate, 29% sodium tripolyphosphate (STPP) and 5% hydrophilic silica . It has been surprisingly and unexpectedly found that structured detergent particles according to the invention comprising significantly higher amounts of sodium carbonate but little or no STPP lead to the formation of less undesirable oversized particles.

[0088] 1.2. A first sample ("comparative sample") was prepared by 1) 33.98 g of precipitated silica powder with a particle size distribution Dw50 of about 6 microns (commercially available under the trade designation SN340 from Evonik Industries AG) and 2) 244.66 grams of ground sodium carbonate with a particle size distribution Dw50 of about 20-25 microns and 3) 197.09 grams of STPP ...

Embodiment 2

[0100] Example 2: Structured detergent granules and composite detergent granules

[0101]Exemplary structured detergent granules according to the present invention were prepared by mixing 1) 34 grams of precipitated silica powder (commercially available from Madhu Silica PVT., Ltd.) with a particle size distribution Dw50 of about 5 microns and 2) 311.4 grams of ground sodium carbonate with a particle size distribution Dw50 of about 20-25 um and 77.9 grams of sodium carbonate were weighed into a batch Tilt-a-pin mixer (from Processall) with the mixer running at 700 rpm Mix down for about 2 seconds; 3) inject 276.7 grams of 96% active HLAS into the mixer at a rate of about 25.2 ml / sec until all the paste is added; 4) then allow the mixture to mix for 2 seconds before stopping; a total of about 679.7 Grams of final product were prepared as Granule A (20.3 grams of carbon dioxide produced and lost) using the composition described in Table IV.

[0102] Exemplary composite deterg...

Embodiment 3

[0109] Example 3: Exemplary Formulations of Granular Laundry Detergent Compositions

[0110]

[0111]

[0112]

[0113] *The base granule is a spray-dried detergent granule comprising about 12-13% by weight LAS, about 70-75% by weight

[0114] % sodium sulfate, about 8-10% by weight silicate and less than 3% by weight moisture.

[0115] All enzyme levels are expressed as carpet active enzyme protein per 100 g of detergent composition.

[0116] The surfactant component is available from BASF (Ludwigshafen, Germany) Shell Chemicals (London, UK); Stepan (Northfield, Ill., USA); Huntsman (Huntsman, Salt Lake City, Utah, USA); Clariant (Sulzbach, Germany)

[0117] Sodium tripolyphosphate is available from Rhodia (Paris, France).

[0118] Zeolites are available from Industrial Zeolites (UK) Ltd (Grays, Essex, UK).

[0119] Citric acid and sodium citrate are available from Jungbunzlauer, Basel, Switzerland.

[0120] NOBS is sodium nonanoyloxybenzenesulfonate suppli...

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Abstract

The present invention discloses a structured detergent particle having a moderate level of surfactant activity, the structured detergent particle comprising 35-50% by weight of C 10 -C 20 Linear alkylbenzene sulfonate, 0.5-8% by weight of hydrophilic silicon dioxide, 40-60% by weight of water-soluble alkali metal carbonate, 0-5% by weight of phosphate builder. Such structured detergent particles are free flowing, have little or no water content, and are formed by a dry neutralization process without any subsequent drying.

Description

technical field [0001] The present invention relates to granular detergent compositions. In particular, it relates to granular detergent compositions comprising free-flowing structured detergent particles having a moderate level of surfactant activity (e.g., 35% to 50% by weight) and relatively high Low water content (eg, 0% to 3% by weight), it can be easily formed by dry neutralization method without any subsequent drying. Background technique [0002] Anionic surfactants comprising linear alkylbenzene sulfonates ("LAS") are among the most commonly used cleaning actives in powder detergent formulations. Detergent particles comprising LAS can be readily formed by a variety of different agglomeration processes. [0003] For example, a liquid LAS acid precursor (i.e., linear alkylbenzene sulfonic acid and commonly referred to as "HLAS") can be mixed with an aqueous solution of sodium hydroxide (i.e., caustic) to form a substantially neutralized LAS paste , which are then m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11D1/12C11D3/08C11D3/10
CPCC11D1/22C11D3/10C11D3/124C11D3/1226C11D3/1233C11D17/06
Inventor 沈睿P·R·莫特 三世陈鸿兴赵媛马俭泽
Owner PROCTER & GAMBLE CO
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