NMP (N-Methyl Pyrrolidone) synthesis device

Abstract

The invention belongs to the technical field of NMP production, and particularly relates to an NMP synthesis device which comprises a GBL head tank, a monomethylamine head tank, a reactor, a GBL metering pump, a monomethylamine metering pump and a static mixer. The reactor comprises a coil pipe and a shell, the coil pipe is fixedly arranged in the shell, and a gap is formed between the coil pipe and the shell. A GBL raw material is introduced into the GBL head tank and then conveyed into the static mixer through the GBL metering pump, the static mixer feeds fully mixed GBL and monomethylamine into the coil pipe, heat conduction oil with a set temperature is added from an oil inlet of the shell, the gap between the coil pipe and the shell is filled with the heat conduction oil, the coil pipe is heated, and the GBL and monomethylamine react in the coil pipe to generate NMP. According to the scheme, high-purity monomethylamine is adopted to prepare NMP, so that separation of a finished product and water after reaction is reduced, and the operation cost is reduced; and water entering the coil pipe is reduced, heat loss is reduced, meanwhile, the contact area of monomethylamine and GBL is enlarged, and the reaction speed is increased.

Description

technical field [0001] The invention belongs to the technical field of NMP production, and in particular relates to an NMP synthesis device. Background technique [0002] The chemical name of NMP is N-methylpyrrolidone (NMP). N-methylpyrrolidone (NMP) is an excellent solvent with high boiling point and environmental protection. It has low viscosity, chemical stability, good thermal stability and high polarity. , low volatility, infinitely miscible with water and many organic solvents, etc. The market application fields of N-methylpyrrolidone are mainly concentrated in industries such as lithium batteries, circuit boards, insulating materials, petrochemicals, pharmaceuticals, pesticides, cleaning, and polymers. The production of NMP is mainly through the ammoniation reaction of GBL and monomethylamine to produce NMP. [0003] The prior art CN201921049113.5 discloses an ammoniation reaction device for NMP production, which includes a housing in which a preheating chamber and...

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Problems solved by technology

[0004] The above scheme uses a methylamine solution, and a large amount of water in the system needs to be separated, which increases the operating cost and the energy consumption per unit of product is high; at the same time, due to the long casing, the heat loss is large, and the energy consumption will increase accordingly; to achieve large-scale production , large investment in equipment, difficult operation

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