Process for making a low density detergent composition by...

C - Chemistry – Metallurgy – 11 – D

Patent

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C11D 11/00 (2006.01) C11D 17/06 (2006.01)

Patent

CA 2254924

A process is provided which produces a low density (below about 600 g/l) detergent composition directly from starting detergent ingredients. The process employs dielectric heating means, such as a microwave (MW) dryer or a Radio Frequency (RF) dryer, to "puff" agglomerates formed by agglomerating a surfactant paste or acid precursor thereof and dry detergent materials. The process does not require the use of conventional spray drying towers, and therefore, is more efficient, economical and flexible with regard to the variety of detergent compositions that can be produced in the process.

On décrit un procédé de production d'une composition de détergence faible densité (inférieure à environ 600 g/l), directement à partir d'ingrédients détergents de départ. Ce procédé consiste à employer des moyens de chauffage diélectriques, tels qu'un séchoir à micro-ondes ou un séchoir hautes fréquences, afin de "faire gonfler" des agglomérats formés par l'agrégation d'une pâte tensioactive, ou d'un précurseur acide de celle-ci, et de matières détergentes sèches. Ce procédé ne nécessite par l'utilisation de tours classiques de séchage par atomisation et, par conséquent, il est plus économique et souple quant à la diversité de compositions de détergence qu'il permet de produire.

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