Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1974-06-05
1976-05-11
Smith, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
252429B, 252429C, 252431R, 526129, 526151, C08F 402, C08F 1002
Patent
active
039562557
ABSTRACT:
A supported catalyst for the polymerization and copolymerization of ethylene in the presence of hydrogen as a molecular weight control agent is prepared by depositing upon silica gel which has been reacted with an alkylaluminum or an alkylaluminum alkoxide, a catalytic composition consisting essentially of a compound of vanadium, a trialkylaluminum and an alkylaluminum alkoxide, said catalytic composition having been prepared by combining said vanadium compound with said alkylaluminum alkoxide and thereafter combining the reaction mixture with said trialkylaluminum. The supported catalyst so prepared exhibits greater activity than does the same catalyst composition supported on untreated silica gel.
REFERENCES:
patent: 2898328 (1959-08-01), Reed et al.
patent: 2981725 (1961-04-01), Luft et al.
patent: 3642748 (1972-02-01), Iwasaki et al.
patent: 3718635 (1973-02-01), Tomoshige et al.
patent: 3784539 (1974-01-01), Ort
patent: 3787384 (1974-01-01), Stevens et al.
Monsanto Company
Smith Edward J.
Sporar Elizabeth F.
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