The invention includes methods of processing an initial di-carbonyl compound by conversion to a cyclic compound. The cyclic compound is reacted with an alkyating agent to form a derivative having an alkylated ring nitrogen. The invention encompasses a method of producing an N-alkyl product. Amonia content of a solution is adjusted to produce a ratio of ammonia to di-carboxylate compound of from about 1:1 to about 1.5:1. An alkylating agent is added and the initial compound is alkylated and cyclized. The invention includes methods of making N-methyl pyrrolidinone (NMP). Aqueous ammonia and succinate is introduced into a vessel and ammonia is adjusted to provide a ratio of ammonia to succinate of less than 2:1. A methylating agent is reacted with succinate at a temperature of from greater than 100 °C to about 400 °C to produce N-methyl succinimide which is purified and hydrogenated to form NMP.
该发明涉及通过将初始二羰基化合物转化为环化合物的方法。将环化合物与烷基化剂反应,形成具有烷基化环氮的衍
生物。该发明涵盖了生产N-烷基产物的方法。调整溶液中的
氨含量,以产生
氨与二
羧酸盐化合物的比例约为1:1至约1.5:1。添加烷基化剂,然后烷基化和环化初始化合物。该发明涉及制备
N-甲基吡咯烷酮(
NMP)的方法。将
水溶
氨和
琥珀酸盐引入容器中,调整
氨的量,使
氨与
琥珀酸盐的比例小于2:1。在温度高于100°C至约400°C的条件下,将甲基化剂与
琥珀酸盐反应,产生经过纯化和加氢处理的N-甲基琥
酰亚胺,形成
NMP。