METHOD FOR PRODUCING AN EMULSION OF ALKENYL SUCCINIC ANHYDRIDE (ASA) IN AN AQUEOUS SOLUTION OF A CATIONIC AMYLACEOUS SUBSTANCE, RESULTING EMULSION, AND USE THEREOF

摘要

A method for producing an emulsion of ASA in an aqueous solution of a cationic amylaceous substance, without having to use a loop for recirculating the product at the emulsification unit. The produced emulsion is characterized by both a fine and monodisperse particle size, and no overheating is involved that could lead to negative phenomena of hydrolyzing the ASA. The corresponding production device is also described.

主权项

1. A process for manufacturing an emulsion of alkenylsuccinic anhydride (ASA) in an aqueous solution of cationic starchy material, comprising the steps of:
a) preparing an aqueous solution of cationic starchy material, b) mixing the ASA and the aqueous solution of cationic starchy material obtained from step a), so as to obtain a cationic starchy material/ASA dry weight ratio of less than 1, preferentially between 0.2 and 0.6 and very preferentially between 0.3 and 0.5, c) preparing in a single pass in an emulsification unit an emulsion from the mixture obtained from step b),characterized in that:
the process does not involve recirculation of the emulsion obtained from step c) in the emulsification unit, and in that the solids content of the aqueous solution of cationic starchy material obtained from step a) is between 5.5% and 11.5% and preferentially between 7% and 10% of its total weight.