Phillips catalyst and its use for preparing ethylene...

Details Phillips catalyst and its use for preparing ethylene... Phillips catalyst and its use for preparing ethylene...

C - Chemistry, Metallurgy

08

F

C08F 4/78 (2006.01) C08F 10/02 (2006.01)

Patent

CA 2071785

O.Z 0050/42519D Abstract of the Disclosure: A novel Phillips catalyst for the homopolymerization of ethylene and the copolymeriza- tion of ethylene with .alpha.-olefins contains as catalytically active components a specific chromium catalyst on an aluminum phosphate support and cocatalysts of the formula I to IV, MR Image (I) (II) (III) (IV) where M is lithium, sodium and potassium, M1 is magnesium and zinc, M2 is boron and aluminum, R is C1-C10-alkyl and C6-C20-aryl, R1 is R and C1-C10-alkoxy and C6-C20-aryloxy, X is chlorine, bromine and iodine, n is 0, 1 and 2 The chromium catalyst on an aluminum phosphate support can be obtained by applying chromium compounds to a finely divided aluminum phosphate with a P:Al molar ratio near to or equal to 1 and a pore volume of > 1 cm3/g and activating the resulting intermediate at elevated temperatures in an oxidizing atmosphere. The novel Phillips catalyst has an exceptionally long dura- tion of activity and its productivity can be increased further by adding hydrogen.

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