Process for the production of polyesters using enzymes and supercritical fluids
AssigneeBayer Aktiengesellschaft
InventorsAlan J. Russell, Eric J. Beckman, Diaf Abderrahmare, Apurva K. Chaudhary
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Abstract
A process of preparing a polyester by reacting a diol with an acid or acid ester in the presence of a solid enzyme and in a supercritical fluid is described.
Claims10
A process for producing a polyester comprising reacting an organic diol with either an organic diester or an organic dicarboxylic acid in the presence of a supercritical fluid and in the presence of a solid esterase enzyme, said process being conducted at a temperature of 120.degree. C. or less and at a pressure of 100 psi or more, with the proviso that the temperature of reaction satisfies the following formula:
- 0.85.ltoreq.T/T.sub.c .ltoreq.1.2,
- where T is the temperature, in .degree.K, at which the process is conducted,
- and
- T.sub.c is the critical temperature, in .degree.K, of the particular supercritical fluid used.
Dependencies are inferred from the claim text.