Maria M. Arinushkina, Victor Y. Krylov, T. Kotelnikova
Jun 11, 2020
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Vestnik of Kuzbass State Technical University
Abstract
In this research work synthesis of 6-aminohexanoic acid was implemented with the method of acid hydrolysis of caprolactam – a trade product produced by JSC “AZOT”. The effect of hydrolysis conditions on the yield of the product was studied; the optimal parameters of the process for producing 6-aminohexanoic acid salt were Вестник Кузбасского государственного технического университета. 2020. No 1, с.61-67 Аринушкина М.М., Крылов В.Ю., Котельникова Т.С., Герасимов С.В. Синтез 6-аминогексановой ... 62 selected. It was shown that hydrolysis is advisable to carry out in concentrations of sulfuric acid at a temperature of about 160 C using 1.7 mol of water and 2.8 mol of sulfuric acid per 1 mol of caprolactam. Under these conditions, the hydrolysis time is 2.5 hours. The content of 6-aminohexanoic acid in the synthesized product was determined by the method of formol titration. After treatment with a suspension of calcium hydroxide, crystalline free form of aminoacid was isolated from crystalline sulfate of 6-aminohexanoic acid; in this case, 1.2 mol of hydroxide and 70 mol of water per 1 mol of salt are needed. The yield of technical 6-aminohexanoic acid was 98.1% of the theoretical one.