Process for removing catalyst residues from polyolefines

Claim 1

PROCESS FOR WORKING UP A CRUDE LOW-PRESSURE POLYOLEFINE SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENES, POLYPROPYLENES AND POLYBUTYLENES CONTAINING A POLYMERIZATION CATALYST PREPARED BY THE REDUCTION OF A COMPOUND OF AN ELEMENT OF THE GROUP CONSISTING OF THE METALS OF GROUPS IV TO VI OF THE PERIODIC SYSTEM INCLUDING THORIUM AND URANIUM BY REACTION WITH A MEMBER OF THE GROU CONSISTING OF ALKALI METALS, ALUMINUM, ALUMINUM HYDRIDE AND METAL ORGANIC COMPOUNDS OF ALUMINUM, MAGNESIUM, ZINC AND ALKALI METALS, WHICH COMPRISES MIXING A SUSPENSION OF THE CRUDE LOW-PRESSURE POLYOLEFINE IN A VOLATILE LOW TO MEDIUM BOILING HYDROCARBON WITH A POLYVLENT WATER SOLUBLE ALCOHOL IN THE RATIO FROM 1 TO 10 MOLES OF ALCOHOL PER MOL OF THE CATALYST AT A TEMPERATURE OF FROM 20* TO 80* C. AND THEN WASHING THE MIXTURE WITH WATER AT A TEMPERATURE BETWEEN 0* AND 50* C.