公开(公告)号：US3631017A

公开(公告)日：1971-12-28

申请号：US3631017D

申请日：1970-01-27

Applicant: BASF AG

Inventor： RETTIG AUGUST ,  BALL WOLFGANG ,  ZIZLSPERGER JOHANN ,  URBAN FRIEDRICH ,  PFANNMUELLER HELMUT

IPC: B29B7/00 ,  B29B13/02 ,  B29C47/00 ,  B29C47/80 ,  B29C47/82 ,  B29C47/92 ,  C08L23/06 ,  C08F27/00 ,  C08F27/28

CPC classification number: B29B13/022 ,  B29C47/0021 ,  B29C47/0023 ,  B29C47/0026 ,  B29C47/786 ,  B29C47/822 ,  C08L23/06

Abstract: A METHOD OF AFTER-TREATING HIGH-PRESSURE POLYETHYLENE IN SHEARING UNIT, WHEREIN THE HIGH-PRESSURE POLYETHYLENE IS INTRODUCED INTO THE SHEARING UNIT AT 200* TO 300*C. AND A VISCOSITY OF 5X10**3 TO 1X10**5 POISES AND SUBJECTED TO A SHEARING GRADIENT, THE SHEARING SURFACES CONTACTING THE POLYETHYLENE MELT BEING HEATED A TEMPERATURE WHICH IS AT LEAST AS HIGH AS THAT OF THE POLYETHYLENE MELT AND THE POLYETHYLENE MELT BEING SHEARED AT SUCH A SHEARING SPEED THAT THE PRODUCT OF SHEARING SPEED AND RESIDENCE TIME IN THE SHEARING ZONE IS EQUAL TO 5X10**2 TO 5X10**4.

公开(公告)号：US3917577A

公开(公告)日：1975-11-04

申请号：US17532471

申请日：1971-08-26

Applicant: BASF AG

Inventor： TRIESCHMANN HANS-GEORG ,  PFANNMUELLER HELMUT ,  URBAN FRIEDRICH ,  BUECHNER OSKAR ,  STEIGERWALD KLAUS ,  BALL WOLFGANG

IPC: C08F110/02 ,  C08F4/34 ,  C08F10/02

CPC classification number: C08F110/02 ,  C08F2/34 ,  C08F2/38

Abstract: A process for the continuous production of ethylene homopolymers by polymerization of ethylene by means of a polymerization initiator and a polymerization regulator at elevated temperature and superatmospheric pressure in a tubular reactor having two or three successive reaction zones, a mixture of ethylene, the polymerization initiator and the polymerization regulator being introduced continuously at the beginning of each reaction zone. It is characteristic of the process according to the invention that special conditions as regards temperature, pressure, polymerization initiator and polymerization regulator are maintained in the individual reaction zones.

Abstract translation: 在具有两个或三个连续反应区域的管式反应器中，通过聚合引发剂和聚合调节剂在升高的温度和超大气压下聚合乙烯来连续生产乙烯均聚物的方法，乙烯，聚合引发剂和 聚合调节剂在每个反应区的开始处连续引入。 根据本发明的方法的特征在于，在各个反应区域中保持关于温度，压力，聚合引发剂和聚合调节剂的特殊条件。