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Process for preparing granular detergent compositions

A detergent and granular technology, applied in the field of granular detergent compositions, can solve the problems of reduced fluidity, stickiness, agglomeration and the like

Inactive Publication Date: 2003-07-30
UNILEVER NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] It has been found that powders produced by non-column methods and containing hydratable salts such as phosphate detergent builders such as sodium tripolyphosphate (STPP) are prone to "stickiness" problems resulting in reduced flow and clumping during storage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Embodiment 1

[0120] In Example 1, Reference Standard 1, and Comparative Examples A and B, the basic powder preparations were produced according to the following formula by adopting the gas fluidized granulation method.

[0121] Na-LAS 24% by weight

[0122] Sodium carbonate 32% by weight

[0123] STPP 32% by weight

[0124] Boiling 4A 10% by weight

[0125] Water 2% by weight

[0126] The LAS acid was sprayed onto the solids fluidized in the gas fluidization chamber using an air assisted atomizer (SUE25 of Atomization Systems). The superficial air velocity of the fluidizing gas is about 0.8ms -1 and a temperature of 23°C.

[0127] After completion of the granulation (after about 5 minutes), the fluidized powder is sprayed with water or an aqueous solution of sodium silicate as follows or not sprayed at all:

Embodiment 1

[0128] Example 1: 4% by weight of water

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Abstract

A process for preparing a free-flowing granular detergent composition with improved storage stability, involves granulation of a solid starting material comprising a hydratable salt with a liquid binder and treating the resulting granules in a low shear mixer with from 0.5 to 20 wt% of water.

Description

field of invention [0001] The present invention relates to a process for the preparation of free-flowing, storage-stable granular detergent compositions. More specifically, the present invention is directed to a method of granulating granular material with a liquid binder and treating the resulting granules with a suitable amount of water. Background of the invention [0002] The transport and storage properties of modern detergent powders have become increasingly important in recent years. The detergent industry is under increasing pressure to meet external consumer demands and expectations as well as internal demands to cut costs and improve production management and supply chains. [0003] An important dimension in the production management and supply chain is the ability to transport and store powders. A serious problem that can arise during storage is powder agglomeration, eg in bulk bags and silos. This can cause a supply chain hindrance, requiring the powder to be ...

Claims

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Application Information

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IPC IPC(8): C11D11/00C11D17/06
CPCC11D17/06C11D11/0082
Inventor A·T·J·格罗特R·W·J·范波梅伦
Owner UNILEVER NV
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