Large pore volume olefin polymerization catalysts

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

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Details

252451, 252458, 423338, C08F 402, C08F 424

Patent

active

043840868

ABSTRACT:
Large pore volume (.gtoreq.1.4 cc/g) silica is obtained by slowly drying an acidic (pH .ltoreq.3.5) silica hydrogel. The gel is useful in connection with chromium as an ethylene polymerization catalyst.

REFERENCES:
patent: 4042769 (1977-08-01), Lynch
patent: 4042770 (1977-08-01), Bachl et al.
patent: 4048414 (1977-09-01), Frielingsdorf et al.
patent: 4152503 (1979-05-01), Short et al.
patent: 4299731 (1981-11-01), McDaniel et al.

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