Exxonmobil Chemical Patents Inc.

Exxonmobil Research and Engineering Company

Patrick Joseph Maher

Michael Walter Bedell

James Richardson Lattner

Keith Holroyd Kuechler

Stephen Neil Vaughn

Teng Xu

Shun Chong Fung

Kenneth Ray Clem

Vijay Swarup

Charles Morris Yarbrough

Dean C Draemel

Paul N Chisholm

Albert Y Hu

A method of processing the waste stream includes introducing the waste stream into the Fluid Catalytic Cracking Unit such that waste stream is processed within the regenerator unit or in CO boiler unit such that the waste stream and the regenerator flue gas are burned within the regenerator unit or the CO boiler unit. The waste stream contains NHand the NHis converted to the NOx and N. The fluid catalytic cracking unit may further include an assembly for converting NOx to N. Flue gas from the CO boiler unit containing NOx and Nis fed to the assembly to NOx to Nwithin the assembly. The assembly for converting NOx to Npreferably includes a selective catalytic reduction unit containing a catalyst, and wherein converting NOx to Nincludes reacting the NOx with the catalyst to produce Nand HO.

Method for treating refinery waste streams in a fluid catalytic cracking unit and an improved catalytic cracking unit for processing refinery waste streams

This invention relates to a method of making an olefin from a dialkyl ether comprising (a) introducing an ether having a formula CHCHinto a thermal or catalytic cracking unit processing a hydrocarbon feedstock; and (b) decomposing at least a portion of the ether to form an olefin having a formula CHand/or CHand an alcohol having a formula CHand/or CHOH, wherein x and y independently range from about 1 to about 30. This invention also relates to a method of reducing coking in a thermal or catalytic cracking unit comprising (a) introducing an ether, having a formula CHOCH, into the cracking unit processing a hydrocarbon feedstock in an amount effective to reduce coke formation relative to processing the hydrocarbon feedstock in the absence of the ether, wherein x and y independently range from about 1 to about 30.

Method for decomposition of ethers

The removal of particulates and acidic gases from the effluent from a fluid catalytic cracking process regenerator. The effluent is treated in two contacting stages with an effective amount of both a caustic solution as well as ammonia and the composition of the contacting solutions in the two stages is independently controlled.

Wet gas scrubbing process

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

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Kingwood, TX, United States of America

Patrick Joseph Maher