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Process for finishing polyolefins

  • US 3,066,130 A
  • Filed: 09/26/1956
  • Issued: 11/27/1962
  • Est. Priority Date: 10/08/1955
  • Status: Expired due to Term
First Claim
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1. A PROCESS FOR REMOVING SOLID CATALYST RESIDUES FROM A SUSPENSION OF A SOLID POLYOLEFIN IN AN ALIPHATIC HYDROCARBON DISPERSANT, SAID POLYMER HAVING BEEN PREPARED BY THE LOW PRESSURE POLYMERIZATION OF AN OLEFIN IN A CATALYST SYSTEM CONSISTING OF (1) A METALLO-ORGANIC COMPOUND OF AN ELEMENT OF GROUPS I-III OF THE PERIODIC TABLE AND (2) A COMPOUND OF A METAL OF SUB-GROUPS IV-VI OF THE PERIODIC TABLE, WHICH COMPRISES ADDING TO SAID SUSPENSION ABOUT 0.5-5% BY VOLUME, BASED ON THE DISPERSANT, OF A MONOHYDRIC ALCOHOL, HEATING THE MIXTURE TO A TEMPERATURE OF ABOUT 40* TO 100*C. TO DISSOLVE THE CATALYST RESIDUES, AND THEN EXTRACTING THE WHOLE OF SAID MIXTURE WITH WATER WHEREBY THE CATALYST RESIDUES ARE TRANSFERRED IN SOLUTION TO THE AQUEOUS PHASE.

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