Ethylene polymerization using a solid catalyst

Claim 1

THE PROCESS OF POLYMERIXING ETHYLENE AT A TEMPERATURE OF 0 TO 250*C. TO A SOLID POLYMER WHICH COMPRISES INTRODUCING ETHYLENE INTO A REACTION SYSTEM, SAID SYSTEM CONSISTING ESSENTIALLY OF THE MIXTURE FORMED BY BRINGING TOGETHER, IN AN INERT HYDROCARBON MEDIUM, AN ETHYLENE POLYMERIZATION CATALYST AND A CALCINED METAL OXIDE HAVING A HIGH SURFACE AREA, SAIS METAL OXIDE BEING AT LEAST ONE MEMBER OF THE CLASS CONSISTING OF ALUMINA, TITANIA AND ZIRCONIA SAID ETHYLENE POLYMERIZATION CATALYST BEING OF THE CLASS CONSISTING OF (1) ORGANOMETALLIC COMPOUNDS HAVING AT LEAST ONE HYDROCARBON GROUP ATTACHED DIRECTLY TO METAL, AND, (2) COMBINATIONS OF A TRANSITION METAL HALIDE OF THE CLASS CONSISTING OF TITANIUM, VANADIUM AND ZIRCONIUN HALIDES AND METAL-R COMPOUNDS, WHEREIN R IS A MEMBER OF THE CLASS CONSISTING OF HYDROGEN AND HYDROCARBON RADICALS, THERE BEING PRESENT NO OTHER ESSENTIAL ETHYLENE POLYMERIZATION CATALYST COMPONENT.