Method of polymerizing olefins

Details Method of polymerizing olefins Method of polymerizing olefins

1982-01-27

1986-05-20

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 96, 526130, C08F 402, C08F 1000

Patent

active

045902461

ABSTRACT:
A method of polymerizing olefins comprising contacting an olefin or mixture of olefins with a catalyst prepared with large pore volume zirconia-silica catalyst supports. The supports are prepared by reacting a zirconium compound of the formula M.sub.4 Zr(C.sub.2 O.sub.4).sub.4.nH.sub.2 O, where M is an alkali metal or ammonium ion and n equals 0 to 10, with a silicon compound of the type A.sub.2 SiO.sub.3, where A is an alkali metal, in an aqueous solution at a pH equal to at least 11, then adding an acidic solution to a pH of about 5-9 to produce a hydrocogel. The hydrocogel is then aged and washed free of soluble by-products with an aqueous washing agent. Water is removed from the washed hydrocogel by azeotropic distillation or by washing with a water miscible solvent and then calcining the resulting xerocogel.

REFERENCES:
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patent: 2825721 (1958-03-01), Hogan et al.
patent: 3950316 (1976-04-01), Witt
patent: 3953413 (1976-04-01), Hwang et al.
patent: 4064336 (1977-12-01), Hwang
patent: 4146694 (1979-03-01), Hwang et al.
patent: 4246137 (1981-01-01), Dombro et al.

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