Patent ID: 9187573
Filing Date: 2015-11-17
Classification: C08B

Abstract:
1. A process for modifying starches comprising: subjecting a non-pregelatinised starch to a superheated steam treatment; wherein said superheated steam treatment is carried out in a reaction chamber, having at least one inlet and at least one outlet, of a spray dryer, introducing a stream of superheated steam into at least one inlet of said reaction chamber, wherein the temperature of superheated steam at an inlet of the reaction chamber is in the range of from 150° C. to 650° C., wherein the temperature of superheated steam at an outlet of the reaction chamber is in the range of from 115° C. to 155° C., an internal wall, a perforated member having a plurality of perforations, wherein the perforated member is selected from the group consisting of a perforated plate, a mesh, and a sieve and wherein the perforated member is located inside the reaction chamber at an inlet for the superheated steam and substantially perpendicular to the direction of flow of the superheated steam, and a nozzle for producing a spray of droplets into the path of the stream of superheated steam, said spray of droplets being formed from a liquid containing the non pregelatinized starch, wherein the reaction chamber is adapted such that, in use, the stream of superheated steam entering the reaction chamber becomes homogenously distributed in the chamber and flows in a direction substantially parallel with the internal wall of the reaction chamber, wherein said spray dryer further comprises a frustoconical member located inside the reaction chamber at an inlet and spaced apart from the internal wall of the reaction chamber such that the frustoconical member and the internal wall of the chamber together define an annular passage for the flow of the stream of superheated steam.