Exxonmobil Chemical Patents Inc.

Paul N Chisholm

Keith Holroyd Kuechler

James Richardson Lattner

Nicolas P Coute

Stephen Neil Vaughn

Teng Xu

Cor F Van Egmond

David Ritchie Lumgair

Shun Chong Fung

Kenneth Ray Clem

Jeffrey Scott Smith

Zhong Yi Ding

Jeffrey Alan Kabin

Dean C Draemel

David R Lumgair, Jr

William L Kuechler, Sr

Patrick Joseph Maher

Nicolas P Coute'

Patrick J Maher

W L Kuechler

This invention is directed to controlling regenerator temperature in an oxygenate to olefin process. Because a significant amount of heat can produced in the regenerator during the regeneration process, at least a portion of the heat must be removed to keep the system from getting too hot. This invention removes heat during the regeneration of the catalyst, using appropriate circulation of catalyst between the reactor and the regenerator. Sufficient circulation can eliminate the need for the use of a catalyst cooler in the regeneration system.

Regeneration temperature control in a catalytic reaction system

The present invention provides a process for making an olefin product from an oxygenate-containing feedstock comprising: a) contacting the feedstock in a reaction zone with catalyst particles comprising a molecular sieve containing acid sites and having an average coke loading of 1 to 10 carbon atoms per acid site of said molecular sieve, under conditions effective to convert the feedstock into an olefin product stream and to provide unregenerated catalyst particles, b) removing a portion of said catalyst particles from said reaction zone and contacting said portion with a regeneration medium in a regeneration zone under conditions effective to obtain regenerated catalyst particles which have an average coke loading of no greater than 10 carbon atoms per acid site of said molecular sieve, and c) introducing said regenerated catalyst particles into said reaction zone to provide a catalyst mixture of unregenerated catalyst particles and regenerated catalyst particles, in an amount sufficient to provide an average coke loading on said catalyst mixture in an amount ranging from 1 to 10 carbon atoms per acid site of said molecular sieve.

Converting oxygenates to olefins over a catalyst comprising acidic molecular sieve of controlled carbon atom to acid site ratio

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 provides a process for making an olefin product from an oxygenate feedstock which comprises: a) contacting the feedstock in a reaction zone with a catalyst comprising i) a molecular sieve having defined pore openings and ii) a CO oxidation metal, under conditions effective to convert the feedstock into an olefin product stream comprising C&#x2013;Colefins and to form carbonaceous deposits on the catalyst so as to provide a carbon-containing catalyst; b) contacting at least a portion of the carbon-containing catalyst with a regeneration medium comprising oxygen in a regeneration zone comprising a fluid bed regenerator having a dense fluid phase and a dilute fluid phase under conditions effective to obtain a regenerated catalyst portion, wherein the difference between the temperature of the dilute phase and the temperature of the dense phase is no greater than 100&#xb0; C.; c) introducing said regenerated catalyst portion into said reaction zone; and d) repeating steps a)&#x2013;c).

Reducing temperature differences within the regenerator of an oxygenate to olefin process

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

The present invention is a process for producing olefin(s) from oxygenate(s). The process removes oxygenate(s) including carbon dioxide in the bottoms of the quench stream and recycles the oxygenate(s) back to the reactor. Carbon dioxide is removed from the quench bottoms before returning oxygenate(s) in the quench bottoms stream to the reactor.

Process for separating and recycling oxygenate(s) to an oxygenate-to-olefin reactor

Disclosed is a method for converting an oxygenate feedstock to an olefin product. In particular, the method incorporates the use of a silicoaluminophosphate molecular sieve catalyst in the manufacture of ethylene and propylene. The method includes contacting an oxygenate-containing feedstock with a silicoaluminophosphate molecular sieve catalyst to form the olefin-containing product in a fluidized bed reactor apparatus including at least a reaction zone and a recirculation zone. Certain ratios of the mass of catalyst in the reaction zone to that of the sum of the mass of catalyst in both the reaction zone and the recirculation zone within the reactor apparatus are specified.

Process for making olefins

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Houston, TX, United States of America

Paul N Chisholm