Exxonmobil Chemical Patents Inc.

Exxon Chemical Patents, Inc.

Lummus Technology Inc.

Exxonmobile Chemical Patents Inc.

Exxonmobil Chemical Company

David Ritchie Lumgair

Michael Peter Nicoletti

James Harding Beech, Jr

Keith Holroyd Kuechler

Cor F Van Egmond

Jeffrey Alan Kabin

Stephen Neil Vaughn

Minquan Cheng

James Richardson Lattner

Machteld Maria Mertens

Nicolas P Coute

Hsiang-Ning Sun

Marcel J G Janssen

John Richard Shutt

Ronald G Searle

Cornelius W M Van Oorschot

Zhong Yi Ding

Paul N Chisholm

Jeffrey J Phillips

Frank Hershkowitz

Harry William Deckman

Gabor Kiss

Helmut Fritz

Michael Gerard Matturro

James H Beech

Dan E Hendriksen

Gary F Janda

Josef Kunkel

Klaus Muller

Gerhard Lauermann

Wilfried Borgmann

Malcolm Pettigrew

Wadie Malaty

Hsiang-ning N Sun

Roland Walzi

Daniel N King

Richard Shutt

Ram Mallik

Marc Dechellis

This invention pertains to separating an olefin stream into at least two olefin streams. The olefin stream that is to be separated is low in diene composition, which allows the olefin stream to be compressed at a relatively high temperature without causing fouling problems in the compressor system. The invention is particularly relevant to separating olefins obtained from an oxygen to olefins unit.

Separating olefin streams

This invention is directed to a method of removing dimethyl ether from an olefin stream. The method includes distilling the olefin stream so that the dimethyl ether is separated out of the olefin stream with propane. The olefin stream can then be further distilled to provide a polymer grade ethylene stream and a polymer grade propylene stream, with each stream containing not greater than about 10 wppm dimethyl ether.

Method of removing dimethyl ether from an olefin stream

This invention is directed to removing contaminants from an oxygenate-containing feedstream for an oxygenate to olefin reaction system. Oxygenate feeds used in the conversion of oxygenates to olefins, and which contain contaminants, are heated to form a vapor stream and a liquid stream. The heating is conducted so that a majority of the metalloaluminophosphate molecular sieve catalyst contaminants is contained in the liquid stream. The vapor stream is separated from the liquid stream, and the separated vapor stream is contacted with the metalloaluminophosphate molecular sieve catalyst to form olefin product. The heating of the feedstream and the separation of the vapor stream can be carried out in one or more stages.

Treating oxygenate containing feedstreams in the conversion of oxygenates to olefins

A feed vaporization process and apparatus for oxygenate to olefin conversion is provided which uses a vapor-liquid disengaging drum to separate non-volatiles and/or partial non-volatiles from volatiles in the oxygenate feed and produce a vaporized effluent that is reduced in non-volatiles and/or partial non-volatiles while at the same time maintaining the effluent at optimal temperature and pressure as a feed for oxygenate to olefin conversion.

Method and apparatus for treating oxygenate-containing feeds and their use in conversion of oxygenates to olefins

The present invention is a process for removal of carbon dioxide from a reactor effluent stream comprising water, carbon dioxide and olefin(s), where a portion of the carbon dioxide is removed in a quenching step with a quench medium and more carbon dioxide is removed by contacting the quenched effluent stream with an alkaline stream. A portion of the alkaline stream is added to the quench medium.

Process for separating carbon dioxide from an oxygenate-to-olefin effluent stream

The present invention is a process for removing catalyst fines from an effluent stream in an oxygenate to olefin process. Specifically, the catalyst fines in the effluent stream are separated from the effluent stream. Then the carbonaceous deposits are removed from the catalyst fines by incineration.

Process for handling catalyst from an oxygenate to olefin reaction

The invention is to a process for removing contaminants from a compressor and/or compressor intercooler in a methanol to olefin separation system. The process comprises compressing an effluent in a compressor having an inlet and an outlet and a compressor surface, the compressing occurring under conditions effective to form a contaminant on the compressor surface. A contaminant-removal medium is injected into the compressor or intercooler and the contaminant-removal medium contacts the contaminant under conditions effective to remove the contaminant from the compressor or intercooler inner surface thereby forming a mobile contaminant. The mobile contaminant is then removed from the compressor or intercooler.

Process for removing contaminants from a compressor intercooler in a methanol to olefin separation system

The present invention is a process for producing olefin(s) from oxygenates that is more effective than previously known processes at removing carbon dioxide from the effluent stream by operating a quench tower at a pH greater than 7.0.

Process for operating a quench device in an oxygenate-to-olefin production unit

Processor for removing contaminants from a compressor in a methanol to olefin separation system

Disclosed is a process for recovering heat in an oxygenate to olefin ('OTO') production process. The process includes removing heat while maintaining the temperature of an effluent stream that comprises solid particles (typically catalyst particles) and a gas phase comprising prime olefins from an OTO reactor above the dew point temperature of the effluent stream. The process further includes washing the effluent stream in solids wash to remove the solid particles from the gas phase into a liquid wash medium.

Heat recovery in an olefin production process

Disclosed is a method of purifying olefin containing oxygenate contaminants. The method incorporates the use of extractive distillation. Under the appropriate conditions, olefins containing very low levels of oxygenate contaminants can be recovered.

Process of removing contaminants from an olefin stream using extractive distillation

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Craddockville, VA, United States of America

David Ritchie Lumgair