Process for preparing detergent granules

Details Process for preparing detergent granules Process for preparing detergent granules

C - Chemistry, Metallurgy

11

D

C11D 1/22 (2006.01) C11D 3/08 (2006.01) C11D 11/00 (2006.01) C11D 17/06 (2006.01)

Patent

CA 2181240

The present invention relates to a process for making a detergent component having a bulk density of at least 650 g/l, which comprises the steps of: (i) forming a structured paste comprising a uniform mixture of, by weight; (a) from 5 % to 40 % of water, (b) from 30 % to 90 % of an ingredient selected from the group consisting of anionic, zwitterionic, cationic, ampholytic and nonionic surfactant; water-soluble organic polymer; and mixtures thereof; (c) from 1 % to 20 % of water-soluble silicate salt; (d) at least 30 % of linear alkyl benzene sulphonate; in a continuous process; wherein the maximum pressure reached in step (i) is not less than 10 bar, and (ii) subsequently dispersing said structured paste with one or more builders in powder form; in a high shear mixer at a tip speed of greater than 10 meters per second; wherein the ratio of the structured paste to the builder powder is from 9:1 to 1:5.

Procédé de fabrication d'un détergent d'une masse volumique d'au moins 650 g/l et comprenant les étapes suivantes: (i) constituer une pâte structurée faite d'un mélange (en poids) de: (a) 5 à 40 % d'eau, (b) 30 à 90 % d'un ingrédient choisi parmi des surfactants anioniques, zwitterioniques, cationiques, ampholytiques et non ioniques; des polymères organiques hydrosolubles ou leur mélange; (c) de 1 à 20 % des silicates hydrosolubles; d'au moins (30) de sulfonates linéaires d'alkyle - benzène, au cours d'un processus continu où la pression maximale atteinte dans la phase (i) n'est pas inférieure à 10 bar, et (ii) disperser ensuite ladite pâte structurée à l'aide d'un ou plusieurs adjuvants pulvérulents dans un malaxeur à fort cisaillement d'une vitesse de pointe dépassant 10 m/s avec un rapport pâte/adjuvant compris entre 9:1 et 1:5.

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