METHOD OF ISOLATION OF OLEFINS USING INSTALLATIONS FOR PRODUCTION OF POLYOLEFINS Russian patent published in 2004 - IPC

FIELD: gas-phase polymerization.

SUBSTANCE: the invention presents a method of isolation of olefins from a gas mixture containing one or several olefins, a noble gas and a catalyst toxin. At that the gas mixture is fed in the block of separation (18) and is separated for olefin and a noble gas. The method of the given invention differs by the fact, that in front of the block (18) of separation or behind it there is a connected apparatus (17) for removal of the catalyst toxin, at that i) in case the apparatus (17) is connected in front of the block (18) of separation, then the catalyst toxin is at least partially removed from the gas mixture, and ii) in case the apparatus (17) is connected behind the block (18) of separation, then the catalyst toxin is at least partially removed from the isolated olefin. At that the olefins in the form of a removable gas are isolated from the gas mixture formed in the process of the catalytic gas-phase polymerization for production of polyolefins. The technical result is the method allows to recuperate olefins in the form of the removable gas and to repeat their introduction in the reaction mixture.

EFFECT: the offered method allows to recuperate olefins in the form of the removable gas and to repeat their introduction in the reaction mixture.

10 cl, 1 dwg