Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1979-04-23
1980-10-14
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, 423335, 423336, 423337, 423338, 526906, 526908, C08F 402, C08F 424
Patent
active
042282616
ABSTRACT:
Process for the preparation of a porous, pure silica which is particularly suitable as a catalyst support for a chromium-oxide catalyst used in polymerizing of olefins. The process comprises the steps of converting a silicon-halogen compound to a silica and then admixing with water to form a silica gel. The gel is then dried and ground to a predetermined particle size. The silica can then be made into a catalyst by placing on the support a chromium compound and then heating in a non-reducing atmosphere.
REFERENCES:
patent: 3132125 (1964-05-01), Schwander et al.
patent: 3239498 (1966-03-01), Witt
patent: 3819598 (1974-06-01), Galiano et al.
Scholten Joseph J. F.
Van de Leemput Lambertus J. M. A.
Levin Stanford M.
Stamicarbon B.V.
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