Verfahren zur Reinigung des bei der Hochdruck-Polymerisation von AEthylen im Kreislauf gefuehrten AEthylens

Recycle ethylene in the high pressure polymerization of ethylene is purified by washing at least 25% of the ethylene, after any polyethylene having a molecular weight of more than 20,000 has been separated, with liquid ethylene at below 50.9 atmospheres. After the polythylene has been separated, a portion, e.g. 5-20%, of the recycle ethylene may be liquefied and the remainder of the recycle ethylene is washed with the liquefied ethylene. The washing may be carried out in a wash column with the liquid ethylene in counter-current to the gas at 25-40 atmospheres and -25 to 0 DEG C. The polyethylene may be used to form sheets.ALSO:Recycle ethylene in the high pressure polymerization of ethylene is purified by washing at least 25% of the ethylene, after any polyethylene having a molecular weight of more than 20,000 has been separated, with liquid ethylene at below 50.9 atm. After the polyethylene has been separated, a portion, e.g. 5-20% of the recycle ethylene may be liquefied and the remainder of the recycle ethylene is washed with the liquefied ethylene. The washing may be carried out in a wash column with the liquid ethylene in counter current to the gas at 25-40 atm. and - 25 DEG to 0 DEG C. The polyethylene may be used to form sheets.