0013246-A1 is referenced by 7 patents and cites 2 patents.

1. A manufacturing process for ethylene polymers with a melt index between 0.1 and 2 and a polydispersity index exceeding 10, by polymerizing ethylene in the presence of a catalytic system comprising at least one halogenated compound of a transition metal and at least one activator selected from the hydrides and the organo-metallic compounds of the metals of groups I through III of the periodic table, in a set of two reactors operating under different temperature and pressure conditions, characterized in that the first reactor operates at a pressure between 800 and 2,000 bars and at a temperature between 160 degrees C and 260 degrees C and the second reactor operates at a pressure between 300 and 600 bars and at a temperature between 240 degrees C and 340 degrees C,; the ethylene polymerization taking place in each of said reactors in the total absence of hydrogen and the flow of ethylene feeding the second reactor representing from 17 to 69% of the total ethylene flow.

Title
Process for widening the molecular distribution of polyethylene by using two reactors operating at very different pressures and temperatures and in the absence of hydrogen, and apparatus for carrying it out.
Application Number
EP19790401073 19791228
Publication Number
0013246 (A1)
Application Date
December 28, 1979
Publication Date
July 9, 1980
Inventor
Durand Pierre
Machon Jean Pierre
Assignee
Charbonnages Ste Chimique
FR
IPC
C08F 04/60
C08F 10/02
C08F 10/00
C08F 04/00
C08F 02/12
C08F 02/04
C08F 02/02
B01J 03/04
C08F 02/00
C08F 10/02
C08F 10/00
C08F 04/6392
C08F 04/62
C08F 04/60
C08F 02/14
C08F 02/04
C08F 02/02
B01J 03/04
C08F 02/00
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