METHOD AND APPARATUS FOR MONITORING AND RESTORING ELECTRICAL PROPERTIES OF POLYMERISATION REACTOR WALL FILM Russian patent published in 2015 - IPC B01J8/24 C08F2/34 

FIELD: chemistry.

SUBSTANCE: invention relates to an olefin polymerisation method and specifically to monitoring and restoring electrical properties of polymerisation reactor wall films. The method includes, during a polymerisation reaction, using a static sensor in a fluidised-bed reactor system to monitor a properties of a coating comprising a polymer film on the surface of the reactor system and a protruding portion of the static sensor, wherein the coating is exposed to flowing fluid within the system, said monitoring including operating the static sensor during a first interval of time during the reaction in order to generate high-speed data indicative of bubbling in the fluidised bed, and determining from the high-speed data an electrical property of the coating, comparing the value of the electrical property determined above with a reference breakdown voltage of the coating, and if said value is less than the reference value, adding a continuity additive to the polymerisation reactor for a period of time until the determined electrical property of the coating is greater than or equal to the reference breakdown voltage of the coating.

EFFECT: invention enables to estimate wear and contamination of the coating and restoration thereof without shutting down the reactor and without material costs.

14 cl, 7 dwg, 2 tbl