High-pressure polymerization process of ethylenically unsaturated monomers in a tubular reactor

摘要

The present technology relates to a process for polymerizing or copolymerizing ethylenically unsaturated monomers in the presence of free-radical polymerization initiators, wherein the polymerization is carried out in a continuously operated tubular reactor at temperatures from 100° C. to 350° C. and pressures from 180 MPa to 340 MPa, with a specific reactor surface area Asp of 2 m2/(t/h) to 5.5 m2/(t/h), and the tubular reactor has a specific ratio RDsp of 0.0050 MPa−1 to 0.0069 MPa−1 and an inner surface which has a surface roughness Ra of 2 μm or less.

主权项

1. A tubular reactor for polymerizing or copolymerizing ethylenically unsaturated monomers, comprising a pipe having:
a length ranging from 0.5 km to 5 km, an inner diameter di ranging from 50 mm to 120 mm, and a length-to-diameter ratio ranging from 1000 to 50000; an inner surface which has a surface roughness Ra of 2 μm or less, determined according to DIN EN ISO 4287:2010; and an inlet and at least two spatially separated initiator injection points downstream of the inlet.