METHOD OF TRANSITION BETWEEN NON-COMPATIBLE SYSTEMS OF OLEFIN POLYMERISATION CATALYSTS Russian patent published in 2014 - IPC C08F10/00 C08F10/02 C08F2/38 C08F2/42 C08F2/34 

FIELD: chemistry.

SUBSTANCE: invention relates to method of transition between non-compatible systems of olefin polymerisation catalysts in one reactor. Described is method of transition from system of Ziegler-Natta catalyst to system of Phillips catalyst for polymerisation of olefins in one reactor, where method includes the following stages: a) interruption of the reaction of the first polymerisation of olefins, carried out in presence of Ziegler-Natta catalyst as a result of suspension of supply of Ziegler-Natta catalyst into reactor and deactivation of Ziegler-Natta catalyst system, or suspension of supply of Ziegler-Natta catalyst system into reactor and increase of reactor temperature, or suspension of supply of Ziegler-Natta catalyst system into reactor and combined application of deactivating agent and increase or reduction of temperature; b) Supply of additional catalyst system, which contains (A) and (B) components resulting in obtaining, respectively, the first and the second polyolefin fractions, where M_w value of the first polyolefin fraction is less than M_w value of the second polyolefin fraction, carrying out reaction of the second polymerisation of olefins in presence of additional catalyst system, where initial activity of catalytic component (A) is higher than initial activity of catalytic component (B), suspension of supply of additional catalyst system into reactor; supply of Phillips catalyst system and carrying out reaction of the third polymerisation of olefins in presence of Phillips catalyst.

EFFECT: elimination of necessity to empty reactor after each reaction of olefin polymerisation.

12 cl, 6 ex, 5 tbl