Ethylene polymerization catalyst

Patent · Tue Mar 07 04:00:00 EST 1989

OSTI ID:6121080

Zoeckler, M T; Karol, F J

A process is described for the polymerization or co-polymerization of ethylene comprising passing ethylene with or without an alpha-olefin comonomer into contact with a vanadium catalyst under polymerization conditions, the catalyst comprising: (i) the reaction product of a vanadium trihalide wherein the halogen is chlorine, bromine, or iodine, or mixtures thereof, and an electron donor, which is a liquid organic Lewis base in which the vanadium trihalide is soluble; (ii) a modifier, BX/sub 3/ or a compound having the formula AIR/sub (3-a)/X/sub a/ wherein each R is an alkyl radical having 1 to 14 carbon atoms and is alike or different; X is chlorine, bromine, or iodine, or mixtures thereof; and a is 0, 1, or 2; (iii) a silican support into which components (i) and (ii) are impregnated; (iv) a salt admixed with the silica support, the cation of the salt being selected from Groups I and II of the Periodic Chart of the Atoms and the anion of the salt being a carbonate or a sulfate; (v) a halocarbon promoter; and (vi) a hydrocarbyl aluminum cocatalyst, wherein the molar ratio of (a) electron donor to vanadium trihalide is about 1:1 to about 20:1; (b) modifier to electron donor is about 0.1:1 to about 10:1; (c) cocatalyst to component (i) is about 5:1 to 500:1; and (d) promoter to cocatalyst is about 0.1:1 to about 10:1.

• Assignee: Union Carbide Corp., Danbury, CT
• Patent Number(s): US 4810761
• OSTI ID: 6121080
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKENES
ALUMINIUM COMPOUNDS
BROMINE
CARBON COMPOUNDS
CARBONATES
CATALYSTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHLORINE
COPOLYMERIZATION
ELEMENTS
ETHYLENE
HALOGENS
HYDROCARBONS
IODINE
MINERALS
MONOMERS
NONMETALS
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POLYMERIZATION
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SULFATES
SULFUR COMPOUNDS