POLYASPARAGIC ACID AS CALCIUM SULPHATE AND BARIUM SULPHATE INHIBITOR.

摘要

A method of producing beta -polyaspartic acid by (a) heating powdered L-aspartic acid to at least 370 DEG F (188 DEG C) to initiate a condensation reaction, then (b) raising the reaction mixture temperature to at least 420 DEG F (216 DEG C), (c) maintaining the reaction mixture at a temperature of at least 420 DEG F (216 DEG C) until at least 80% conversion to polysuccinimide has occurred, and (d) hydrolysing the polysuccinimide. (