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Two-stage neutralization process for forming detergent granules, and products containing the same

A detergent granule, neutralization technology, applied in the direction of detergent preparation, detergent composition, coating detergent composition, etc. of liquid components, can solve the problems of limited fluidity, susceptibility to coagulation and caking, etc.

Active Publication Date: 2017-02-22
PROCTER & GAMBLE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the detergent granules formed by the two-step neutralization process disclosed in EP614380B are pourable and free-flowing, which is an improvement over the process disclosed in US6660708B, they have limited flowability and are prone to agglomeration and caking

Method used

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  • Two-stage neutralization process for forming detergent granules, and products containing the same
  • Two-stage neutralization process for forming detergent granules, and products containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0094] Aqueous surfactant acid precursor HLAS with 97% activity, 1% free water, 1% H2SO4 and 1% miscellaneous was pumped into the static mixer at a rate of 3300 kg / hr via a positive displacement pump. Caustic solution NaOH with 50% activity was also pumped into the static mixer at a rate of 120 kg / hr. The mixture after the static mixer was pumped into a Lodige CB 75 at a rate of 3420 kg / hr. At the same time, a powder stream comprising sodium carbonate was also fed to a Lodige CB75 mixer at a rate of 6.5 ton / hr. Also flowing into the same mixer are two streams of sorted recycle comprising agglomerates, one comprising wet coarse particles and the other comprising dry fines. The agglomerates leaving the Lodige CB75 mixer were fed into a Lodige KM 4200 mixer. Thereafter, the agglomerates were fed into a fluid bed dryer at an air inlet temperature ranging from 90C to 140C. The air inlet temperature and air flow are adjusted to achieve a final humidity of less than 1.5% for the a...

Embodiment II

[0096] Aqueous surfactant acid precursor HLAS with 97% activity, 1% free water, 1% H2SO4 and 1% miscellaneous was pumped into the static mixer at a rate of 3300 kg / hr via a positive displacement pump. Caustic solution NaOH with 50% activity was also pumped into the static mixer at a rate of 180 kg / hr. The mixture after the static mixer was passed through a heat exchanger to reduce the temperature to 70C. The mixture was then pumped into the Lodige CB 75 at a rate of 3480 kg / hr. At the same time, a powder stream comprising sodium carbonate was also fed to a Lodige CB 75 mixer at a rate of 6.5 ton / hr. Also flowing into the same mixer are two streams of sorted recycle comprising agglomerates, one comprising wet coarse particles and the other comprising dry fines. The agglomerates leaving the Lodige CB75 mixer were fed into a Lodige KM 4200 mixer. Thereafter, the agglomerates were fed into a fluid bed dryer at an air inlet temperature ranging from 90C to 140C. The air inlet te...

Embodiment III

[0098] Aqueous surfactant acid precursor HLAS with 97% activity, 1% free water, 1% H2SO4 and 1% miscellaneous was pumped at a rate of 330 kg / hr into the static mixer via a positive displacement pump. Caustic solution NaOH with 50% activity was also pumped into the static mixer at a rate of 10 kg / hr. The mixture after the static mixer was pumped to a storage tank with a water jacket, where the temperature of the jacket was controlled at 50C to 80C. 22 kg of sodium carbonate powder material was added to a batch agglomeration plowshare mixer. Then, 8 kg of the HLAS / NaOH mixture was pumped at a rate of 2 kg / min into the plowshare agitator via a positive displacement pump. Add the liquid mixture to the chopper position. After metering the liquid mixture, the stirrer was stopped and then an additional 0.07 kg of zeolite was added to the batch stirrer. Run the mixer continuously for another 2 minutes. The final product is a free-flowing detergent granule. The partial neutralizat...

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Abstract

Provided is a two-stages neutralization process for forming detergent granules comprising a linear alkyl benzene sulphonate anionic surfactant with improved flowability and simplified processing requirements.

Description

technical field [0001] The present invention relates to a process for forming detergent granules comprising a linear alkylbenzene sulfonate (LAS) anionic surfactant, in particular by a two-step neutralization process for forming detergent granules , characterized by high surfactant activity, low residual acid, improved particle flow, and simplified processing requirements. Background technique [0002] When making detergent compositions containing anionic surfactants, anionic surfactants are often made by using their acid precursors because the acid precursors of such anionic surfactants, especially linear alkylbenzene sulfonates (LAS) are easier to handle, store and transport than anionic surfactants themselves. The acid precursors of such anionic surfactants are then converted into salt-form anionic surfactants by a neutralization process in which the acid precursors are mixed or contacted with a neutralizing agent, which The agent is usually a strong or weak base compou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D11/04
CPCC11D1/22C11D11/04C11D17/0039C11D17/06
Inventor 沈睿耿代涛P·R·莫特三世
Owner PROCTER & GAMBLE CO