公开(公告)号：US3925341A

公开(公告)日：1975-12-09

申请号：US41906073

申请日：1973-11-26

Applicant: BASF AG

Inventor： MUELLER-TAMM HEINZ ,  SCHICK HANNES ,  RAU WOLFGANG ,  HENNENBERGER PETER

IPC: C08F6/00 ,  B29B9/00 ,  B29B9/06 ,  B29B9/16 ,  C08F6/02 ,  C08F6/06 ,  C08F8/00 ,  C08F6/28

CPC classification number: C08F6/02 ,  C08F8/00 ,  C08L23/02 ,  C08F10/00

Abstract: A process for working up particulate polyolefins obtained by polymerization carried out with the aid of Ziegler/Natta catalysts. The process of the invention is characterized by a continuous, conventional operation (1) comprising the following integrated sub-stages: (1.1) introducing particulate polyolefin to a melting zone, (1.2) passing the molten polyolefin to a degassing zone, (1.3) transferring the degassed polyolefin to a discharge zone, and (1.4) finally extruding and granulating the resulting polyolefin; and by an important, additional and new feature (2) comprising the addition of an alkenoxide, water and optionally nitrogen to the polyolefin immediately before it passes to the melting zone or while it is in the melting zone. This process makes it possible to produce granular polyolefins of low halogen content in a particularly simple manner.

公开(公告)号：US3634382A

公开(公告)日：1972-01-11

申请号：US3634382D

申请日：1969-08-01

Applicant: BASF AG

Inventor： TRIESCHMANN HANS-GEORG ,  RAU WOLFGANG ,  MUELLER-TAMM HEINZ ,  PFANNMUELLER HELMUT

IPC: C08F8/50 ,  C08F110/06 ,  C08J3/12 ,  C08F3/10 ,  C08F27/26 ,  C08F29/02

CPC classification number: C08J3/12 ,  C08F8/50 ,  C08F110/06 ,  C08F2810/10 ,  C08J2323/12 ,  Y10S526/909 ,  C08F2/02

Abstract: PRODUCTION OF GRANULAR PROPYLENE POLYMERS IN WHICH (1) PROPYLENE IS POLYMERIZED BY MEANS OF A ZIEGLER-NATTA CATALYST IN THE ABSENCE OF SOLVENTS OR DILUENTS SO THAT A POWDERED POLYMER IS DIRECTLY OBATINED WHICH HAS SPECIAL SPECIFICATION, (2) THIS POLYMER IS GIVEN A THERMAL AND MECHANICAL AFTERTREATMENT IN A SPECAIL WAY WITHOUT THE CATALYST HAVING BEEN PREVIOUSLY DEACTVATED, AND (3) THE POLYMER THUS AFTERTREATED IS HOMOGENIZED, EXTRUDED AND GRANLUATED BY CONVENTIONAL METHODS. THE POLYMER OBTAINES IS PARTICULARLY EASY TO PROCESS.

公开(公告)号：US3652527A

公开(公告)日：1972-03-28

申请号：US3652527D

申请日：1969-10-27

Applicant: BASF AG

Inventor： TRIESCHMANN HANS-GEORG ,  RAU WOLFGANG ,  JACOBSEN THEODOR ,  PFANNMUELLER HELMUT

IPC: B01J8/10 ,  B01J8/20 ,  C08F110/06 ,  C08F1/42 ,  C08F3/08

CPC classification number: B01J8/20 ,  B01J8/10 ,  C08F110/06 ,  Y10S526/904 ,  C08F2/34

Abstract: A PROCESS FOR THE POLYMERIZATION OF PROPYLENE IN THE GAS PHASE IN A BED OF POWDERED POLYPROPYLENE BY MEANS OF A CATALYST SYSTEM OF: (A) A SOLUTION OF AN ALUMINUM ALKYL IN A HYDROCARBON; AND (B) A SUSPENSION OF A TITANIUM OR VANADIUM HALIDE COMPOUND IN A HYDROCARBON; IN WHICH THE TWO COMPONENTS (A) AND (B) ARE SUPPLIED SEPARATELY TO THE REACTION ZONE.

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