Browse Prior Art Database

Conversion of a Discontinuous Catalyst Feed into a Semi-continuous Feed

IP.com Disclosure Number: IPCOM000241074D
Publication Date: 2015-Mar-24
Document File: 2 page(s) / 53K

Publishing Venue

The IP.com Prior Art Database

Related People

ExxonMobil Chemical Company: OWNER [+2]

Abstract

Catalyst feeder design may result in a discontinuous catalyst feed to a polymerization reactor in the form of catalyst “shots”. These “shots” are concentrated areas of solid catalyst particles carried into the polymerization reactor via a diluent which in this case is isobutane. A back-mix vessel was inserted between the discontinuous catalyst feeder and the polymerization reactor. This vessel is of such size/dimensions that it allows for the capability to blend and mix several catalyst “shots” together, creating a semi-continuous catalyst feed to the polymerization reactor.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 51% of the total text.

Page 01 of 2

Conversion of a Discontinuous Catalyst Feed into a Semi-continuous Feed

Abstract: Catalyst feeder design may result in a discontinuous catalyst feed to a polymerization reactor in the form of catalyst "shots". These "shots" are concentrated areas of solid catalyst particles carried into the polymerization reactor via a diluent which in this case is isobutane. A back-mix vessel was inserted between the discontinuous catalyst feeder and the polymerization reactor. This vessel is of such size/dimensions that it allows for the capability to blend and mix several catalyst "shots" together, creating a semi-continuous catalyst feed to the polymerization reactor.

Background

Solid catalyst feeders may feed in a discontinuous manner due to inherent design limitations. This discontinuous feed, in the form of catalyst "shots", can result in catalyst gradients within the polymerization reactor. These catalyst gradients can result in polymerization reactor instabilities.

Since solid catalyst types do not lend themselves well to being pumped using traditional pumping methods, an alternative method for conversion of a discontinuous feed to a semi- continuous one was developed. This method consists of a vessel located between the catalyst feeder and the polymerization reactor. The vessel is of such dimensions that it allows for the combining of several "shots" of catalyst before exiting into the polymerization reactor.

©2015 Exxon Mobil Corporation.  All Rights Reserved.  To the extent the user is entitled to disclose and distribute  this document, the user may forward, distribute, and/or photocopy this copyrighted document only if unaltered  and  complete,  including  all  of  its  headers,  footers,  disclaimers,  and  other  information.    You  may  not  copy  this  document to a Web site or other location.  ExxonMobil does not guarantee the typical (or other) values.  Analysis  may have been performed on representative samples and not the actual product shipped.  The information in this  document relates only to the named product or materials when not in combination with any other product or  materials.  WE BASED THE INFORMATION ON DATA BELIEVED TO BE RELIABLE ON THE DATE COMPILED, BUT WE  DO NOT REPRESENT, WARRANT, OR OTHERWISE GUARANTEE, EXPRESSLY OR IMPLIEDLY, THE MERCHANTABILITY,  FITNESS  FOR  A  PARTICULAR  PURPOSE,  SUITABILITY,  ACCURACY,  RELIABILITY,  OR  COMPLETENESS  OF  THIS  INFORMATION OR THE PRODUCTS, MATERIALS, OR PROCESSES DESCRIBED HEREIN.  The user ...