公开(公告)号：WO2014206862A1

公开(公告)日：2014-12-31

申请号：PCT/EP2014/062969

申请日：2014-06-19

Applicant: DSM IP ASSETS B.V.

Inventor： ROOS, Peter ,  RIESTHUIS, Theodorus Friederich Maria ,  TINGE, Johan Thomas ,  LUIJK VAN, Cornelis Marinus

IPC: C01C1/24 ,  C07D201/16

CPC classification number: C01C1/24 ,  C07D201/16

Abstract: The present invention provides a continuous process for the production of ammonium sulfate in combination with caprolactam, said process comprising, a) neutralizing with ammonia a mixture comprising caprolactam and sulfuric acid to form an aqueous ammonium sulfate phase and an aqueous crude caprolactam phase; b) separating the aqueous ammonium sulfate phase from the aqueous crude caprolactam phase; c) extracting into an organic solvent caprolactam present in the aqueous ammonium sulfate phase to form a caprolactam-containing organic phase and a purified aqueous ammonium sulfate phase; d) stripping organic solvent from the purified aqueous ammonium sulfate phase; and e) withdrawing organic solvent-containing gas produced in, or subsequent to, any one of steps c) and d), characterized in that f) organic solvent is recovered from said organic solvent-containing gas.

Abstract translation: 本发明提供了与己内酰胺组合生产硫酸铵的连续方法，所述方法包括：a）用氨中和含己内酰胺和硫酸的混合物以形成硫酸铵水相和含水的己内酰胺相; b）从含水的己内酰胺相中分离出硫酸铵水相; c）提取存在于硫酸铵水溶液相中的有机溶剂己内酰胺以形成含己内酰胺的有机相和纯化的硫酸铵水相; d）从纯化的硫酸铵水相中汽提有机溶剂; 和e）取出在步骤c）和d）中的任何一个中或之后产生的含有机溶剂的气体，其特征在于f）从所述含有机溶剂的气体中回收有机溶剂。