Pyrrolidone 616-45-5

Synthesis and production process

After years of development, the industrial production technology of 2-pyrrolidone has become mature and efficient. There are mainly the following synthesis methods:

Succinic anhydride method

Process flow: Succinic anhydride reacts with ammonia to generate butyrolactam, and 2-pyrrolidone is obtained by catalytic hydrolysis and cyclization.

Features: The raw material source is wide and the process is relatively simple, but there are certain challenges in by-product control and wastewater treatment.

Acetonitrile-ethylene ketone method

Process flow: Acetonitrile and ethylene ketone react with the catalyst to generate an open ring structure and then cyclize to form 2-pyrrolidone.

Features: Mild reaction conditions and high selectivity, but the production and storage requirements of ethylene ketone are high.

Biological fermentation method

Process flow: Use microbial metabolism to convert biomass such as succinic acid into 2-pyrrolidone.

Features: Green and environmentally friendly, few by-products, and gradually realizing industrialization, but the current cost is relatively high.

IV. Main application areas

1. Solvent

2-pyrrolidone is widely used as an industrial solvent due to its excellent solubility and stability:

Inkjet printing ink: As a core solvent, 2-pyrrolidone can significantly improve the fluidity, adhesion and stability of ink, while also having low volatility, reducing the impact on the environment during the printing process.

Coatings and adhesives: used to dissolve polymer materials such as polyurethane and polyvinyl chloride to improve the film-forming property and adhesion of coatings.

Electronic cleaning agent: In the cleaning of semiconductors and precision electronic components, 2-pyrrolidone can effectively remove surface dirt without damaging the substrate.

2-Pyrrolidone itself is used in printer cartridges].

Some drugs are derivatives of 2-pyrrolidone, such as cotinine, doxapram, polyvinylpyrrolidone, ethosuximide and piracetam.

2-Pyrrolidone is an intermediate in the production of vinylpyrrolidone, a precursor of polyvinylpyrrolidone, and the solvent NMP.

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