Continuous polymerization of 2-pyrrolidone with carbon dioxide as activator
Abstract
Abstract A CONTINUOUS PROCESS FOR THE POLYMERIZATION OF 2-PYRROLIDONE, WHEREIN THE PYRROLIDONE IS PURIFIED BY DISTILLATIN UNDER VACCUM, THE PURIFIED PYRROLIDONE IS DIVIDED INTO TWO PARTS, ONE PART BEING REACTED WITH AN ALKALI METAL HYDROXIDE TO FORM THE ALKALI METAL SALT OF 2-PYRROLIDONE, THE MIXTURE OF 2-PYRROLIDONE AND ALKALI METAL SALT THEREOF IS CONTACTED WITH CARBON DIOXIDE, THE CARBONATED REACTION MASS IS ADMIXED WITH THE SECOND PORTION OF THE PURIFIED 2-PYRROLIDONE, THE THUS DILUTED, CARBONATED REACTION MASS IS POLYMERIZED TO A CONTROLLED EXTENT AND THE PARTIALLY POLYMERIZED MASS IS EXTRUDED INTO PELLETS, THE PELLETS BEING CURED, AND FREED OF UNREACTED MONOMER AND IMPURITIES TO PROVIDE A FINAL PRODUCT COMPRISING THE PELLETS OF 2-PYRROLIDONE.
Inventors
- 👤 Peter A Jarovitzky
- 👤 Frederick L Maynor
Bibliographic Details
Claims Analysis
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