Temperature control for polymerizing particulate polyolefin

摘要

A method is described that includes contacting an olefin with a catalyst in a polymerization reactor, polymerizing at least a portion of the olefin to form an alpha olefin reaction product, detecting a condition within the polymerization reactor, determining an average temperature of at least one olefin product particle based on the condition, determining an operating particle temperature threshold using a foul curve, comparing the average temperature of the polymer particle to the operating particle temperature threshold, changing one or more operating parameters in response to the comparing, and maintaining the average temperature of the olefin polymer particle at or below the operating particle temperature threshold in response to changing the one or more operating parameters. The alpha olefin reaction product includes a plurality of olefin polymer particles, and the polymerization reactor includes a reaction mixture that includes the olefin, the catalyst, a diluent, and the alpha olefin reaction product.

主权项

1. A polymerization process comprising:
contacting an olefin with a catalyst in a polymerization reactor; polymerizing at least a portion of the olefin to form an alpha olefin reaction product, wherein the alpha olefin reaction product is in the form of a plurality of olefin polymer particles, wherein the polymerization reactor comprises a reaction mixture comprising the olefin, the catalyst, a diluent, and the alpha olefin reaction product; detecting, by sensor, a condition within the polymerization reactor; determining, by a processor, an average temperature of at least one olefin polymer particle of the plurality of olefin polymer particles based on the condition; determining an operating particle temperature threshold using a foul curve; comparing, by the processor, the average temperature of the at least one olefin polymer particle to the operating particle temperature threshold; changing one or more operating parameters in response to the comparing; and maintaining the average temperature of the at least one olefin polymer particle at or below the operating particle temperature threshold in response by changing the one or more operating parameters.