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US 8,796,445 B2Granted
Acylation of carbohydrates
AssigneeNederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
InventorsJohannes Wilhelmus Timmermans, Jan Matthijs Jetten, Theodoor Maximiliaan Slaghek, Ingrid Karin Haaksman
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Abstract
Esterification of a carbohydrate using an acylating agent can effectively be performed using a process comprising: (a) combining the carbohydrate with the acylating agent, (b) adjusting the moisture content of the combination below 40 wt. %, and (c) subjecting the combination to superheated steam. The carbohydrate is especially starch and the acylating agent is in particular an acid, such as an organic acid, amino acid, or diacid.
Claims9
A process for esterifying starch, comprising:
- (a) combining the starch with 0.01-0.6 mole of an acylating agent per mole of glycosyl unit of the starch, wherein the acylating agent is selected from C2-C30 fatty acids, hydroxy-substituted aromatic acids, and C2-C18 diacids,
- (b) adjusting the moisture content of the combination below 40 wt. %, and
- (c) subjecting the combination to superheated steam having a degree of saturation between 10 and 95% and having a temperature of at least 100° C.,
- wherein an esterified starch is produced having a molecular weight of at least 700 kDa.
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Dependencies are inferred from the claim text.