System and method for preparing NMP (N-Methyl Pyrrolidone) by taking maleic anhydride as raw material

Abstract

The invention provides a system and method for preparing NMP by using maleic anhydride as a raw material, the system comprises a hydrogenation reactor, a hydrogenation separation device, an amination reactor and an amination separation device, the hydrogenation reactor is used for carrying out hydrogenation reaction on maleic anhydride to obtain a hydrogenation reaction mixture, the hydrogenation separation device is used for separating the hydrogenation reaction mixture, and the amination reactor is used for carrying out amination separation on the hydrogenation reaction mixture. The amination reactor is used for enabling gamma-butyrolactone to be subjected to amination reaction to obtain an amination reaction mixture, and the amination separation device is used for separating the amination reaction mixture to obtain NMP (N-Methyl Pyrrolidone). According to the system and the method for preparing the NMP by using the maleic anhydride as the raw material, a continuous production process for producing the GBL by one-step hydrogenation of the maleic anhydride is realized, and a continuous production process for producing the GBL by one-step hydrogenation of the maleic anhydride, refining the GBL and synthesizing the NMP by aminating the refined GBL and the methylamine aqueous solution is realized.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a system and method for preparing NMP from maleic anhydride. Background technique [0002] With the outbreak of my country's new energy automobile industry and the replacement frequency of mobile phones and notebook computers, the lithium-ion battery industry has shown a steady growth trend. This industry has developed into the industry with the highest degree of industrialization in my country's emerging industries. N -Methylpyrrolidone (NMP), as an indispensable material for the production of lithium-ion batteries, accounts for about 3-6% of the production cost of lithium-ion batteries, and the market demand continues to expand. [0003] Synthesis of NMP by methylation of γ-butyrolactone (GBL) is the most widely used and mature process route at present, and 40% methylamine water process is mostly used in industrial production. [0004] In the GBL synthesis process,...

AI Technical Summary

Problems solved by technology

[0009] In view of this, the present invention aims to propose a system and method for preparing NMP with maleic anhydride as raw material with simple process, complete reaction, good product quality, high yield, green energy saving, continuous and stable, to effectively solve the current industrial process Long route, incomplete reaction, high production cost, high energy consumption, high investment, and difficulty in the treatment of three wastes, etc., to improve the comprehensive economic benefits of GBL and NMP production

Images