Process and catalyst for the polymerization of .alpha.-olefins

Details Process and catalyst for the polymerization of .alpha.-olefins Process and catalyst for the polymerization of .alpha.-olefins

1981-05-01

1983-01-11

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252429B, 526114, 526116, 526119, 526142, 526352, C08F 402, C08F 1000

Patent

active

043683061

ABSTRACT:
Poly-.alpha.-olefins, particularly polyethylene, having a broad molecular weight distribution, can be prepared discontinuously or continuously in the gaseous phase or in hydrocarbons as dispersants, at a pressure of from 2 to 40 bar and at a temperature of from 60.degree. C. to 100.degree. C., optionally with the use of hydrogen as a molecular weight regulator in the presence of a catalyst solid which is manufactured in two reaction steps, from a primary solid containing magnesium and chlorine which has been reacted, in a reaction stage A, with peroxy compound(s) and with halogen-containing metal compounds of elements of IV and/or V sub-group(s) of the Mendeleev Periodic Table and, in reaction stage B, with halogen-containing metal compounds of elements of IV and/or V subgroup(s) of the Mendeleev Periodic Table, and/or metal organyl compounds of metals of the II and/or III main group(s) of the Mendeleev Periodic Table. The sequence of the reaction stages A and B is not critical for the success of the process according to the invention.

REFERENCES:
patent: 4109071 (1978-08-01), Berger et al.
patent: 4115319 (1978-09-01), Scata et al.

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