METHODS OF CONTROLLING POLYMERISATION REACTOR OPERATION Russian patent published in 2015 - IPC C08F10/00 C08J11/04 C08F6/02 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of terminating polymerisation in a reactor for gas-phase polymerisation with the application of an idling mode. The method of transferring the reactor for gas-phase polymerisation into the idling mode includes: introduction of a polymerisation neutralising agent into the reactor in an amount sufficient for the termination of polymerisation in it; termination of the polymer product discharge from a reactor; termination of the supply of an initial reaction mixture and catalyst material into the reactor; adjustment of pressure in the reactor from a value of pressure in the operation mode to the value of pressure in the idling mode, adjustment of a reduced rate of the circulating fluid medium, passing through the reactor, from a value of the reduced rate in the operation mode to the value of the reduced rate in the idling mode and support of the reactor in the idling mode for the certain time period. The version of the method is also claimed.

EFFECT: reduction of pollution in the reactor is provided.

15 cl, 3 tbl, 2 dwg, 3 ex