Exxonmobil Research and Engineering Company

Exxon Research and Engineering Company

Exxonmobil Chemical Patents Inc.

Exxonmobile Research and Engineering Company

Dean C Draemel

Teh Chung Ho

Nicholas Charles Nahas

George A Swan, Iii

Richard Edwards Walter

Leonard Schoenman

Jackson I Ito

James Richardson Lattner

Michael Siskin

Keith Holroyd Kuechler

Stephen Neil Vaughn

Teng Xu

Shun Chong Fung

Kenneth Ray Clem

Todd R Steffens

Glen Edward Phillips

Paul N Chisholm

Patrick Joseph Maher

Bruce J Artuso

This invention relates to the feed injection zone of a FCC. The feed injection zone is non-circular in shape allows for optimal penetration between feed and catalyst in the feed injection zone.

FCC feed injection zone

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

A cavitation enhanced atomizing process comprises forming a flowing solution of the liquid to be atomized and a lower boiling cavitating liquid. This flowing solution is then contacted with a pressure reducing means, at a temperature below the bubble point of the cavitating liquid in the solution, to produce cavitation bubbles. These bubbles comprise cavitation liquid vapor and the bubble nucleation produces a two-phase fluid of the bubbles and liquid solution. The two-phase fluid is passed downstream into and through an atomizing means, such as an orifice, and into a lower pressure atomizing zone, in which the bubbles vaporize to form a spray of liquid droplets. The nucleated bubbles also grow in size as the so-formed two-phase fluid passes downstream to and through the atomizing means.

Cavitation enhanced liquid atomization

The invention relates to a process and apparatus for controlling afterburning in the regenerator of a FCC unit. The process and apparatus inject steam into the dilute phase within a regenerator to promote combustion of carbon monoxide before it enters the regenerator cyclones, plenum, or flue gas transfer lines.

Process for minimizing afterburn in a FCC regenerator

A process and apparatus for atomizing a fluid is disclosed. The processes and apparatuses are useful for atomizing a feed oil for a fluid cat cracking (FCC) or other suitable process.

Fluid atomization process

A method for mitigating the condensation of liquid hydrocarbons and subsequent coke deposition in refinery reactor units by dew point suppression.

Mitigation of coke deposits in refinery reactor units

An atomizing gas, such as steam, and a hot fluid comprising a hot liquid to be atomized, are passed under pressure, through separate fluid conduits in a heat exchange means, in which the hot liquid heats the steam to a superheat temperature, by indirect heat exchange. The superheated steam is then injected into the hot fluid, which comprises a two-phase fluid comprising steam and the hot liquid, subsequent to the superheated steam injection. The two-phase fluid is passed through an atomizing means, such as an orifice, into a lower pressure atomizing zone, which causes the steam to expand and atomize the liquid into a spray of liquid droplets. The two-phase fluid is formed before or as a consequence of the superheated steam injection and is preferably steam-continuous when passed through the atomizing means. This process is useful for atomizing a hot feed oil for a fluid cat cracking (FCC) process.

Superheating atomizing steam with hot FCC feed oil

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Kingwood, TX, United States of America

Dean C Draemel