Basf Aktiengesellschaft

J&ouml;rg Liebe

Johann-Peter Melder

Frank Ohlbach

Karl-Heinz Ross

Martin Rudloff

N-Methyl-2-pyrrolidone (NMP) is prepared by preparing a mixture comprising monomethylamine, dimethylamine and trimethylamine and ammonia in a first process step by reacting ammonia with methanol at elevated temperature in the presence of a catalyst, separating 10 off the ammonia, reacting the mixture comprising the methylamines with gamma-butyrolactone (&ggr;-BL), in a molar ratio of monomethylamine to &ggr;-BL of at least 1 in a second process step at elevated temperature and superatmospheric pressure, separating NMP and unreacted methylamines from the reaction product and returning unreacted methylamines to the first process step for reaction with methanol and ammonia.

Growing community of inventors

Tokyo, Japan

Jörg Liebe

Growing community of inventors

Tokyo, Japan

J&ouml;rg Liebe

Jörg Liebe