Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1981-07-21
1983-05-17
Levin, Stanford M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
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.
McDaniel Max P.
Meister John J.
Levin Stanford M.
Phillips Petroleum Company
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