polymerization or copolymerization process of ethylene unsaturated monomers in the presence of free radical polymerization initiators

摘要

patent specification: "polymerization or copolymerization process of unsaturated ethylene monomers in the presence of free radical polymerization initiators". polymerization or copolymerization process of ethylene unsaturated monomers in the presence of free radical polymerization initiators at pressures from 110 mpa to 500 mpa and at temperatures from 100 ° to 350 ° c in a continuously operated polymerization apparatus where the gas composition The reaction gas is compressed to polymerization pressure by at least two compressors in sequential operation where a low pressure compressor first compresses the reaction gas composition to a pressure ranging from 10 mpa to 50 mpa and where A high pressure compressor then compresses the reaction gas composition to the polymerization pressure where the high pressure compressor is operated with a polyalkylene glycol-based synthetic lubricant and oxygen is introduced into the fresh gas inlet or polymerization apparatus in an amount such that the composition of the gas to be compressed in the compressor High pressure gas has an oxygen content ranging from 0.01 ppm to 0.9 ppm and process for operating a compressor to pressurize unsaturated monomers with ethylene to a pressure of 5 mpa to 500 mpa where the compressor is lubricated with a lubricant polyalkylene glycol-based synthetic compound and where the composition of the gas to be pressurized has an oxygen content ranging from 0.01 ppm to 0.9 ppm. 21169235v1