申请人:Sumitomo Chemical Company, Limited
公开号:US04220592A1
公开(公告)日:1980-09-02
A substituted acetonitrile such as .alpha.-isopropyl-p-chlorophenylacetonitrile is hydrolyzed using an acid to produce the corresponding substituted phenylacetic acid such as .alpha.-isopropyl-p-chlorophenylacetic acid in such a manner that, in a lot in any one hydrolysis reaction, (1) the hydrolysis is carried out in at least two steps, (2) an acid to be used in a subsequent first reaction step is a waste acid produced in a previous second reaction step and the subsequent reaction step(s) thereof if any, and (3) an acid to be used in a second reaction step and the subsequent reaction step(s) if any, is the waste acid produced in a previous second reaction step and subsequent reaction step(s), respectively, and a fresh acid.
通过使用酸,对类似α-异丙基-p-氯苯基乙腈这样的取代乙腈进行水解,以产生相应的取代苯乙酸,例如α-异丙基-p-氯苯乙酸。在任何一个水解反应中的一批中,采用以下方式进行水解:(1)至少分两步进行水解,(2)用于随后第一反应步骤的酸是在之前第二反应步骤中产生的废酸,以及其随后的反应步骤(如果有的话),(3)用于第二反应步骤及其随后的反应步骤(如果有的话)的酸是在之前第二反应步骤和随后的反应步骤中产生的废酸和新鲜酸。