Spray-drying process

C - Chemistry – Metallurgy – 11 – D

Patent

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Details

C11D 11/02 (2006.01) C11D 1/02 (2006.01) C11D 3/08 (2006.01)

Patent

CA 2726031

The present invention relates to a process for preparing a spray-dried powder comprising: (i) anionic detersive surfactant; (ii) from 0wt% to 10wt% zeolite builder; (iii) from 0wt% to 10wt% phosphate builder; and (iv) from 3wt% to 15wt% silicate salt; the process comprising the steps of. (a) heating an aqueous slurry to a temperature above 100°C to form a heated slurry; and (b) spraying the heated slurry at temperature above 100°C into a spray-drying tower; (c) spray-drying the slurry to form a spray-dried powder.

La présente invention concerne un procédé de préparation d'une poudre séchée par pulvérisation comprenant : (i) un tensioactif détergent anionique; (ii) de 0 % en poids à 10 % en poids dun adjuvant zéolite; (iii) de 0 % en poids à 10 % en poids dun adjuvant phosphate; et (iv) de 3 % en poids à 15 % en poids de sel de silicate; le procédé comprenant les étapes consistant à : (a) chauffer une bouillie aqueuse jusqu'à une température supérieure à 100°C afin de former une bouillie chauffée; et (b) pulvériser la bouillie chauffée à une température supérieure à 100°C à lintérieur dune tour de séchage par pulvérisation; (c) sécher par pulvérisation la bouillie afin de former une poudre séchée par pulvérisation.

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