CONTROLLING H DISTRIBUTION IN HORIZONTAL STIRRED BED REACTOR Russian patent published in 2015 - IPC C08F10/00 C08F10/06 C08F2/00 C08F2/01 

FIELD: chemistry.

SUBSTANCE: invention relates to controlling olefin polymerisation. Described is a method of polymerising olefins, which includes polymerisation of at least one olefin monomer in more than one polymerisation zone in one or more reactors. Polymerisation is carried out in an apparatus having one or more reaction vessels into which an olefin monomer and catalyst components are fed and which contain a stirred layer of the formed polymer particles. The polymerisation method includes steps of: feeding into a first polymerisation zone one or more olefin monomer streams with hydrogen concentration of about 0-70 mol %; feeding into the next polymerisation zone one or more olefin monomer streams with hydrogen concentration of about 0-70 mol %; removing from the last polymerisation zone the obtained polymer with polydispersity of about 5-20. The amount of gaseous hydrogen fed into the reaction vessels by a recycling gas feeding system is set to maintain a constant flow rate of the melt of the obtained polymer.

EFFECT: controlling content of the obtained composition in different polymerisation zones, widening and controlling the molecular weight distribution of the polymer.

9 cl, 1 dwg