Process for production of polyethylene

Details Process for production of polyethylene Process for production of polyethylene

1987-06-22

1992-02-04

Smith, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Removing and recycling removed material from an ongoing...

526348, 5263485, 5263486, C08F 602, C08F 1002

Patent

active

050861310

ABSTRACT:
A novel process for production of polyethylene comprises polymerizing ethylene or a mixture of ethylene and a copolymerizable comonomer in the presence of a Ziegler-type catalyst at a pressure of 200 atm or more and at a temperature of 125.degree. C. or more, wherein an organic peroxide is added to the resulting polymerization product taken out of a reaction zone to deactivate the remaining catalyst. Formation of undesired oligomers or low-molecular polymers is prevented because the reaction does not proceed in the polymerization product taken out of the reaction zone. There is almost no retardation of the polymerization reaction even by the recycled use of the monomer separated and collected from the polymerization product.

REFERENCES:
patent: 3070589 (1962-12-01), Kirch et al.
patent: 4105609 (1978-08-01), Machon et al.
patent: 4238355 (1980-12-01), Shipley et al.
patent: 4388219 (1983-06-01), Bujadoux
patent: 4430488 (1984-02-01), Zboril
patent: 4486579 (1984-12-01), Machon et al.
patent: 4719270 (1988-01-01), Miwa et al.

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