Polymerization process

Claim 1

IN A LOW PRESSURE PROCESS FOR THE POLYMERIZATION OF ETHYLENE BY CONTACTING ETHYLENE AND A CATALYST IN THE PRESENCE OF AN ORGANIC SOLVEN: WHICH HAS A BOILING POINT WITHIN THE RANGE OF FROM 50 TO 85* CENTIGRADE AND AT A TEMPERATURE WITHIN THE RANGE OF FROM 38 TO 85* CENTIGRADE AND BELOW THE CATALYST DECOMPOSITION TEMPERATURE AND UNDER PRESSURES OF FROM 10 TO 50 POUNDS PER SQUARE INCH, IN WHICH THE CATALYST IS A MIXTURE OF (A) AND (B) (A) HAVING THE GENERAL FORMULA RR''AIX, IN WHICH R IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL RADICALS AND ARYL RADICALS, R'' IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ALKYL RADICALS, AND ARYL RADICALS, X IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, HALOGEN ATOMS, ALKLOXY RADICALS, ALKYL, ARYLOXY RADICALS, SECONDARY AMINO RADICALS, SECONDARY ACID AMIDE RADICALS, MERCAPTO RADICALS, THIOPHENYL RADICALS, RADICALS OF CARBOXYLIC ACIDS AND RADICALS OF SULFONIC ACIDS, AND IN WHICH (B) IS SELECTED FROM THE GROUP CONSISTING OF INORGANIC AND ORGANIC SALTS OF METALS OF GROUPS IV-B, V-B AND VI-B OF THE PERIODIC SYSTEM INCLUDING THORIUM AND URANIUM, THE IMPROVEMENT IN SAID LOW PRESSURE PROCESS OF CONTACTING IN A REACTION ZONE ETHYLENE AND A CATALYST IN THE PRESENCE OF AN INERT SOLVENT WHICH COMPRISES THE STEPS OF VENTING GAS FROM SAID SOLTION ZONE WHILE REMOVING CONDENSABLE VAPORS OF SAID SOLVENT AND CONSTITUENTS SOLUBLE THEREIN FROM SAID VENTED GAS BY CONDENSATION AND RETURNING SAID VAPORS SO REMOVED AND CONSTITUENTS SOLUBLE THEREIN TO SAID REACTION ZONE.