Preparation of ethylene copolymers in fluid bed reactor

US4302566A · kind A · utility

Assignee

• UNION CARBIDE CORPORATION · US

Inventors

• Frederick J. Karol · Montgomery, US
• George L. Goeke · Kendall Park, US
• Burkhard E. Wagner · Highland Park, US
• William A. Fraser · Mahopac, US
• Robert J. Jorgensen · Fort Bragg, US
• Nils Friis · Gulf Stream, US

Key dates

• Filing date: Feb 27, 1979
• Grant date: Nov 24, 1981
• Expiry date: Feb 27, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2410/01
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Ethylene copolymers having a density of .gtoreq.0.91 to .ltoreq.0.96 and a melt flow ratio of .gtoreq.22 to .ltoreq.32 are readily produced in a low pressure gas phase process at a productivity of .gtoreq.50,000 pounds of polymer per pound of Ti with a particulate catalyst diluted with an inert carrier material and formed from selected organo aluminum compounds and a precursor composition of the formula: EQU Mg.sub.m Ti.sub.1 (OR).sub.n X.sub.p [ED].sub.q wherein ED is a selected electron donor compound. PA1 m is .gtoreq.0.5 to .ltoreq.56 PA1 n is 0 or 1 PA1 p is .gtoreq.6 to .ltoreq.116 PA1 q is .gtoreq.2 to .ltoreq.85 PA1 R is a C.sub.1 to C.sub.14 aliphatic or aromatic hydrocarbon radical, or COR' wherein R' is a C.sub.1 to C.sub.14 aliphatic or aromatic hydrocarbon radical, and PA1 X is selected from the group consisting of Cl, Br, I, or mixtures thereof.