Single stage recovery of high purity isoquinoline, useful e.g. as starting material for drugs or dyes, by crystallizing isoquinoline fraction from coal-tar having restricted quinoline and quinaldine contents

摘要

Purification of isoquinoline (IQ) involves crystallization of an IQ fraction, containing up to 1 wt. % quinoline (QL) and up to 8 wt. % quinaldine (QA), obtained in the processing of coal-tar.