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1.发明授权Process for removing catalyst metal residues from high density polyethylenes 失效从高密度聚乙烯中除去催化剂金属残留物的方法
公开(公告)号：US3689473A
公开(公告)日：1972-09-05
申请号：US3689473D
申请日：1970-11-06
Applicant: SNAM PROGETTI
Inventor： BALDUCCI AGOSTINO , BARADEL AGOSTINO , MARENA MASSIMO
Abstract: HIGH DENSITY POLYETHYLENE IS FREED OF CATALYST METAL RESIDUES BY CONTACTING WITH A MIXTURE OF AN ANHYDROUS ALCOHOL AND A HYDROCARBON, WHICH IS THE SAME AS THAT USED AS THE SUSPENSION MEDIUM IN THE FORMATION OF THE POLYETHYLENE. IT IS PREFERRED TO CARRY OUT THE CONTACTING IN A COUNTERCURRENT APPARATUS IN WHICH THE POLYETHYLENE FLOWS DOWNWARDLY AGAINST AN UPWARDLY MOVING STREAM FORMED FROM THE ANHYDROUS ALCOHOL AND THE HYDROCARBON.
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