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Spray-Drying Process

a technology of spray drying and spraying, which is applied in the direction of surface-active detergent compositions, instruments, detergent compositions, etc., can solve the problems of poor mixing in the crutcher mixer, the limit on the amount of detergent ingredients that can be spray-dried in this manner,

Inactive Publication Date: 2011-06-23
THE PROCTER & GAMBLE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are limitation on which detergent ingredients, and / or the combination of detergent ingredients, can be spray-dried in this manner.
These surfactants tend to form highly viscous phases in the crutcher mixer; such phases are extremely difficult to handle in the manufacturing plant, leading to poor mixing in the crutcher mixer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

A Spray-Dried Laundry Detergent Powder and Process of Making it

Aqueous Alkaline Slurry Composition.

[0046]

Aqueous slurryComponent(parts)Sodium Silicate8.5Acrylate / maleate copolymer3.2Hydroxyethane di(methylene phosphonic acid)0.6Sodium carbonate8.8Sodium sulphate42.9Water19.7Miscellaneous, such as magnesium sulphate, and one1.7or more stabilizersAqueous alkaline slurry parts85.4

Preparation of a Spray-Dried Laundry Detergent Powder.

[0047]An alkaline aqueous slurry having the composition as described above is prepared in a slurry making vessel (crutcher). The alkaline aqueous slurry is shear thinning and has a viscosity in the range of from 0.5 to 30 Pas at a temperature of 70° C. and at a shear rate of 50 s−1. The moisture content of the above slurry is 23.1%. Any ingredient added above in liquid form is heated to 70° C., such that the aqueous slurry is never at a temperature below 70° C. Saturated steam at a pressure of 6.0×105 Pa is injected into the crutcher to raise the temperatur...

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Abstract

A process for preparing a spray-dried detergent powder having (i) detersive surfactant; and (ii) other detergent ingredients; wherein the process comprises the steps of: (a) forming an aqueous detergent slurry in a mixer; (b) transferring the aqueous detergent slurry from the mixer through at least one pump to a spray nozzle; (c) contacting alkoxylated anionic detersive surfactant and / or acid precursor thereof to the aqueous detergent slurry after the mixer and before the spray nozzle to form a mixture; (d) spraying the mixture through the spray nozzle into a spray-drying tower; and (e) spray-drying the mixture to form a spray-dried powder.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a spray-drying process.BACKGROUND OF THE INVENTION[0002]Spray-drying is the standard method for manufacturing laundry detergent base powder. Typically, detergent ingredients are mixed together to form an aqueous detergent slurry in a mixer, such as a crutcher mixer. This slurry is then transferred through at least one pump to a spray nozzle, and the slurry is sprayed into a spray-drying tower, and spray-dried to form a spray-dried powder.[0003]However, there are limitation on which detergent ingredients, and / or the combination of detergent ingredients, can be spray-dried in this manner. This is especially true for alkoxylated anionic detersive surfactants. These surfactants tend to form highly viscous phases in the crutcher mixer; such phases are extremely difficult to handle in the manufacturing plant, leading to poor mixing in the crutcher mixer.[0004]The Inventors have found that by reducing, or even removing, alkoxylat...

Claims

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Application Information

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IPC IPC(8): B29B9/16
CPCC11D11/02C11D1/29G06F12/0253G06F16/9574
Inventor CARDOZO, LARRY SAVIOTANTAWY, HOSSAM HASSANLICKISS, JAMES ROBERTSOMERVILLE ROBERTS, NIGEL PATRICK
Owner THE PROCTER & GAMBLE COMPANY
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