Acylation Process
AssigneeSOLVAY ACETOW GmbH
InventorsAndreas HUMMEL, Hans-Juergen EHRET
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Abstract
The invention concerns a process for the manufacture of an acylated polysaccharide which comprises. (a) reacting a polysaccharide with an acylating agent to produce an acylated polysaccharide and (b) washing the acylated polysaccharide with water containing from 0.05 to 15 mg/l Ca2+-ions (c) recovering the washed acylated polysaccharide and an aqueous phase containing carboxylic acid from step (b).
Claims19
1-16. (canceled)
A process for manufacturing an acylated polysaccharide comprising:
- (a) reacting a polysaccharide with an acylating agent to produce an acylated polysaccharide;
- (b) washing the acylated polysaccharide with water containing from 0.05 to 15 mg/l Ca2+-ions;
- and
- (c) recovering the washed acylated polysaccharide and an aqueous phase containing carboxylic acid from step (b).
An aqueous carboxylic acid solution comprising from 5 to 40 weight percent acetic acid, from 0.05 to 15 mg/l Ca2+-Ions, and from 10 to 20000 mg/l SO42−-ions.
Dependencies are inferred from the claim text.