The future of n-methylpyrrolidone is broad

N-methylpyrrolidone (nmp) is a polar aprotic solvent with high boiling point, strong polarity, low viscosity, strong solubility, no corrosion, low toxicity, good chemical and thermal stability, etc. In the field of aromatics extraction, purification and separation of acetylene, olefins, diolefins, polymer solvents and polymerization solvents. With the rapid development of domestic high-strength engineering plastics such as polyamide, polyimide, and polyphenylene sulfide, and the high-strength fiber, higher requirements are placed on the quality and demand of N-methylpyrrolidone.

At present, there are three main industrial processes for N-methylpyrrolidone: a) γ-butyrolactone (GBL) and monomethylamine (MMA) to synthesize N-methylpyrrolidone; b) γ-butyrolactone and mixed amine Reaction synthesis of N-methylpyrrolidone; c) Dehydrogenation-amination of 1,4-butanediol to prepare N-methylpyrrolidone. The production capacity of N-methylpyrrolidone abroad is mainly concentrated in the hands of a few large companies. More than 10 companies in China are engaged in the production of N-methylpyrrolidone, but the scale of the device is relatively small, the sources of raw materials are many, and the quality of products is poor. Production technology needs to be improved. At present, the annual production of apparent N-methylpyrrolidone in China is 53 kt / a, and it is increasing at a rate of 6% to 8% per year. The prospect of NMP is relatively broad.

2 pyrrolidone is used to prepare a white ink. White ink provides good visibility when printed on transparent and colored substrates. There are particular problems when using white ink in inkjet printing. For example, titanium dioxide is a common white ink pigment and is typically three to four times heavier than pigments used in other color inks. Thus, pigments such as titanium dioxide tend to be more strongly agglomerated and precipitated, and thus clog the nozzles of the inkjet system. Therefore, the development of white inks containing titanium dioxide is particularly challenging. The white ink of the present invention is particularly advantageous for printing colored, transparent and translucent substrates.

polyvinylpyrrolidone K,PVP K has been developed into homopolymer, copolymer and cross-linked polymer. It has three specifications and hundreds of varieties: industrial grade, pharmaceutical grade and food grade. In the application field, the first artificial plasma solvents have been developed into medicine, cosmetics, food, coatings, adhesives, printing and dyeing auxiliaries, separation membranes, photosensitive materials and other fields.