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Slurry Feeder for a Polymerization Reactor

IP.com Disclosure Number: IPCOM000244002D
Publication Date: 2015-Nov-04
Document File: 2 page(s) / 57K

Publishing Venue

The IP.com Prior Art Database

Abstract

A modified slurry feeder design is provided that offers a more simple approach to conventional slurry feeders resulting in a lower investment cost option for feeding a slurry to a polymerization reactor

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Slurry Feeder for a Polymerization Reactor

Abstract: A modified slurry feeder design is provided that offers a more simple approach to conventional slurry feeders, resulting in a lower investment cost option for feeding a slurry to a polymerization reactor.

Background

The delivery of polyolefin catalyst systems and its related components using a slurry offers many advantages over dry solid catalysts. For example, in gas phase polymerization reactions, it is generally accepted that slurry feed is more reliable and easily controlled than dry catalyst feed. From a mechanical standpoint, slurry feeders are much simpler than dry feeders. Feeding and precisely metering a fluid (the slurry) is simpler than attempting to convey a solid catalyst stream into the polymerization reactor at high differential pressure with precision control of feed rates. Thus, a solid catalyst feeder is more complicated in design and maintenance. Slurry feeders, on the other hand, are simpler in design and provide a positive means of controlling and measuring the feed rate of catalyst and its related components into the polymerization reactor. This translates into lower maintenance costs and less downtime.

In slurry feed processes, typically, a mixture of a polyolefin catalyst, catalyst components and/or catalyst additives with a carrier liquid, for example, mineral oil, is fed to a polymerization reactor from an agitated tank (a tank equipped with an agitator or mechanical mixer). The agitator is provided to keep solid materials suspended in the slurry. The slurry from the agitated tank feeds a pump that is usually placed directly below the tank, and the pump feeds the slurry to the polymerization reactor.

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