This invention relates to a process to Manufacture N-Methyl-2-Pyrrolidone (=1-Methyl-2-pyrrolidone, NMP) by reaction of Gamma Butyrolactone ([gamma]-BL) with mono Methylamine (MMA) at a temperature of 200°-300°C and at a pressure of 25-100 kg/cm gauge and molar ratio of 1:1, 1-1.5.
A process to obtain high purity polyvinyl pyrrolidone by purifying the polymer solution using cation exchange resin to reduce the unreacted N-vinyl pyrrolidone content and obtain polyvinyl, pyrrolidone with K- value of about 25-35 useful preferably in pharmaceutical and cosmetic applications.
[Class : 1] Chemicals For Use In Industry, Science And Photography, As Well As In Agriculture, Horticulture And Forestry; Unprocessed Artificial Resins, Unprocessed Plastics; Fire Extinguishing And Fire Prevention Compositions, Tempering And Soldering Preparations; Substances For Tanning Animal Skins And Hides; Adhesives For Use In Industry; Putties And Other Paste Fillers; ...