Large pore alumina-supported transition metal alkyl

Details Large pore alumina-supported transition metal alkyl Large pore alumina-supported transition metal alkyl

1980-07-31

1981-12-08

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

526154, 526170, 252431R, C08F 402, C08F 476

Patent

active

043046851

ABSTRACT:
In a process for polymerizing a 1-olefin with a catalyst system comprising a reaction product of a porous alumina and an organometallic compound of the formula (RCH.sub.2).sub.4 M wherein M is Ti, Zr, or Hf and R is a group which is such that there is no hydrogen atom attached to an atom which is in the .beta.-position to M, and more specifically, R is aryl, aralkyl, tertiary alkyl, for example, trialkylmethyl, or trialkylsilyl, the improvement characterized in that the alumina has an average pore diameter of at least about 150 A and/or at least about 10% of the total pore volume of the alumina is provided by pores having diameters greater than about 200 A.

REFERENCES:
patent: 3635935 (1972-01-01), Long
patent: 3840508 (1974-10-01), Ballard et al.
patent: 3932307 (1976-01-01), Setterquist
patent: 3950269 (1976-04-01), Setterquist
patent: 3971767 (1976-07-01), Setterquist
patent: 4011383 (1977-03-01), Setterquist
patent: 4017525 (1977-04-01), Setterquist
patent: 4018707 (1977-04-01), Wyatt
patent: 4056669 (1977-11-01), Ballard et al.
patent: 4228263 (1980-10-01), Howard et al.

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