METHOD OF PRODUCING POLYOLEFIN POLYMER WITH IMPROVED WAX DEPOSITION Russian patent published in 2015 - IPC C08F10/00 C08F10/02 C08F2/18 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a polyolefin polymer by continuous suspension polymerisation of one or more olefin monomers in the presence of a polymerisation catalyst in at least one polymerisation reactor. The method is carried out at temperature of ot 40-120°C and pressure of 0.1-10 MPa. A suspension of solid polyolefin particles in a suspension medium is collected from the polymerisation reactor, where the suspension has a temperature of 65-120°C. The suspension collected from the polymerisation reactor is fed into a moderating vessel and held at temperature of 60-85°C for a period of time sufficiently long for the mean dwell dime of the suspension in the moderating vessel to be at least 5 minutes. The suspension from the moderating vessel is then collected and cooled to 20-55°C. The solid polyolefin particles are mechanically separated from the liquid suspension medium.

EFFECT: fewer wax-like components in the liquid suspension medium.

18 cl, 1 dwg, 1 ex