Exxonmobil Chemical Patents Inc.

Exxonmobil Research and Engineering Company

Exxon Research and Engineering Company

Exxon Chemical Patents, Inc.

Philip Andrew Ruziska

Brian Erik Henry

Tan Jen Chen

Gordon Frederick Stuntz

Paul F Keusenkothen

Keith Holroyd Kuechler

Tan-Jen Chen

Stephen M Davis

Jeffrey Lawrence Brinen

Karl Gottlieb Strohmaier

Avelino Corma Canos

David E W Vaughan

Antonio Chica Lara

Joaquin Perez Pariente

Javier Agundez Rodriguez

John Scott Buchanan

Machteld Maria Mertens

Gary David Mohr

David Lawrence Stern

Kenneth Ray Clem

Luc R M Martens

Johannes Petrus Verduijn

Marcel J G Janssen

Paul K Ladwig

Luc Roger Marc Martens

Angelo A Montagna

S Mark Davis

Jannetje Maatje Van Den Berge

James C Pirkle, Jr

Mechilium (Marcel) Johannes Gerardus Janssen

Mechilium Johannes Gerardus Janssen

Lynn L Zhao

The present invention relates to a process for selectively producing Colefins from a catalytically cracked or thermally cracked naphtha stream. The process is practiced by recycling a Crich fraction of the catalytic naphtha product to the riser upstream the feed injection point, to a parallel riser, to the spent catalyst stripper, and/or to the reactor dilute phase immediately above the stripper.

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A process is described for producing olefins from a vapor product stream from an oxygenate to olefin conversion reaction, the vapor product stream comprising Cto Colefins, C+ hydrocarbons, at least one oxygenate and water. In the process, the vapor product stream is cooled to remove water therefrom and produce a first vapor effluent stream. The first vapor effluent stream is then cooled and compressed to produce a condensed liquid effluent stream comprising C+ hydrocarbons and at least one oxygenate, and a residual vapor effluent stream comprising Cto Colefins. At least part of the condensed liquid effluent stream is contacted with a liquid water-containing stream in a liquid-liquid contacting device to at least partly separate said condensed liquid effluent stream, or portion thereof, into an aqueous phase rich in said at least one oxygenate and an organic phase rich in said C+ hydrocarbons.

Process for producing olefins

A process is described for producing an olefins stream from a first vapor effluent stream from an oxygenate to olefin conversion reaction, said first vapor effluent stream comprising Cand Colefins, Chydrocarbons, and Cto Ccarbonyl compounds. In the process, the temperature and pressure of the first vapor effluent stream are adjusted to produce a second vapor effluent stream having a pressure ranging from about 100 psig to about 350 psig (790 to 2514 kPa) and a temperature ranging from about 70&#xb0; F. to about 120&#xb0; F. (21 to 49&#xb0; C.), said second vapor effluent stream containing about 50 wt. % or more Chydrocarbons based upon the total weight of Chydrocarbons in the first vapor effluent stream. The second vapor effluent stream is then washed with a liquid alcohol-containing stream to produce a third vapor effluent stream, whereafter the third vapor effluent stream is washed with liquid water to provide a fourth vapor effluent stream comprising the Cand Colefins and about 1.0 wt. % or less Cto Ccarbonyl compounds.

A multi component catalyst and catalytic cracking process for selectively producing Colefins. The catalyst comprises a first molecular sieve having an intermediate pore size, a second molecular sieve and, optionally a third molecular sieve having a large pore size. At least one of the channels of the second molecular sieve has a pore size index that is less than the pore size index of at least one channel of the first molecular sieve. The process is carried out by contacting a feedstock containing hydrocarbons having at least 5 carbon atoms is contacted, under catalytic cracking conditions, with the multi component catalyst. The catalyst finds application in the cracking of naphtha and heavy hydrocarbon feedstocks.

Multi component catalyst and its use in catalytic cracking

A process for producing olefins comprises providing a vapor product stream from an oxygenate to olefin reaction, the vapor product stream comprising Cto Colefins, Cto Ccarbonyl compounds and water. The vapor product stream is cooled to provide a first vapor effluent stream comprising no more than 10 wt. % water, and a liquid water-rich stream. The first vapor effluent stream, and a first wash flash vapor stream, are compressed from a first pressure to a second pressure greater than said first pressure to form a second vapor effluent stream, which is then cooled to form a cooled second effluent stream that is at least partially in the vapor state. At least part of the cooled second effluent stream is washed with a liquid alcohol-containing stream, at a third pressure greater than the first pressure but not greater than the second pressure, to produce a wash liquid stream, which comprises Cand Colefins, and a wash vapor stream, which contains less Cto Ccarbonyl compounds than the first vapor effluent stream. The wash liquid stream is exposed to a pressure of at least the first pressure but less than the third pressure to form a first wash flash liquid stream and the first wash flash vapor stream, the first wash flash vapor stream being provided for compression with the first vapor effluent stream.

The present invention relates to a process for selectively producing Colefins from a catalytically cracked or thermally cracked naphtha stream by fractionating the naphtha feed to obtain at least a Crich fraction and feeding the Crich fraction into a reaction stage at a point wherein the residence time of the Crich fraction is minimized.

The present invention relates to a process for selectively producing Colefins from a catalytically cracked or thermally cracked naphtha stream by fractionating the naphtha feed to obtain a Cfraction and feeding the Cfraction either in the riser downstream of the injection point for the reminder of the naphtha feed, in the stripper, and/or in the dilute phase immediately downstream or above the stripper of a process unit.

The invention provides a method for converting a hydrocarbon feedstock to propylene comprising: contacting an olefinic hydrocarbon feedstock boiling in the naphtha range with a catalyst comprising a zeolitic catalyst selected from the group consisting of medium pore zeolites having a ratio of silica to alumina above 200 and pore diameter less than 0.7 nm under cracking conditions to selectively produce propylene. The preferred catalyst comprises of a zeolite having an 8, 10, or 12 membered ring pore structure. The preferred catalysts are selected from the group consisting of zeolites from the families MFI, MEL, MTW, TON, MTT, FER, MFS, and the zeolites ZSM-21, ZSM-38 and ZSM-48. Preferably the method is carried out to produce propylene with greater than 50% specificity, more preferably, the propylene to butylene ratio is at least 2:1 or a propylene to ethylene ratio of at least 4:1. The olefinic hydrocarbon feedstock consists essentially of hydrocarbons boiling within the range of 18&deg; to 220&deg; C. (65&deg; F. to 430&deg; F.). The olefinic hydrocarbon feedstock comprises from about 10 wt % to about 70 wt % olefins. Preferably the olefinic hydrocarbon feedstock comprises from about 5 wt % to about 35 wt % paraffins. The catalyst is contacted in the range of 400&deg; C. to 700&deg; C., a weight hourly space velocity (&ldquo;WHSV&rdquo;) of 1 to 1,000 hr and a pressure of 0.1 to 30 atm. absolute.

Hydrocarbon conversion to propylene with high silica medium pore zeolite catalysts

The invention provides a method for converting an olefinic hydrocarbon feedstock to propylene comprising: contacting a hydrocarbon feedstock under catalytic cracking conditions with a catalyst comprising a catalyst selected from the group consisting of SAPO catalysts, MeAPO catalysts, MeASPO catalysts, ElAPO catalysts, ElASPO catalysts, rare earth exchanged catalysts from any of the preceding groups, and mixtures thereof, under cracking conditions to selectively produce propylene. The invention further provides a method for stabilizing a catalyst to steam from the foregoing group by ion exchange with a rare earth metal. A catalyst has enhanced stability as used herein when treated with a rare earth metal or metals in a concentration effective to provide a catalyst which exhibits a higher conversion of a hydrocarbon feedstock to propylene than does an equal quantity of an untreated sample of the same catalyst under the same conditions following exposure of each catalyst to steam for a period of at least 10 hours.

Method for selectively producing propylene by catalytically cracking an olefinic hydrocarbon feedstock

Disclosed are silicoaluminophosphates (SAPOs) having unique silicon distributions and high catalytic cracking activity a method for their preparation and their use as FCC catalysts. More particularly, the new SAPOs have a high silica:alumina ratio and favorable Si atom distribution. The new SAPOs may have a small crystal size and may be synthesized from a single-phase synthesis solution.

Silicoaluminophosphates having an AEL structure and their use as FCC catalysts

This invention relates to a process to produce propylene from a hydrocarbon feed stream, preferably a naphtha feed stream, comprising C5 and C6 components wherein a light portion having a boiling point range of 120&deg; C. or less is introduced into a reactor separately from the other components of the feed stream.

Multiple feed process for the production of propylene

Disclosed are silicoaluminophosphates (SAPOs) having unique silicon distributions, a method for their preparation and their use as catalysts for the catalytic cracking of hydrocarbon feedstocks. More particularly, the new SAPOs have a high silica: alumina ratio, and are prepared from microemulsions containing surfactants.

Catalytic silicoaluminophosphates having an AEL structure, and their use in catalytic craking

Disclosed are silicoaluminates (SAPOs) having unique silicon distributions, a method for their preparation and their use as naphtha cracking catalysts. More particularly, the new SAPOs have a high silica:alumina ratio and favorable Si atom distribution.

Method for the use of new silicoaluminophosphas having an AEL structure to convert naptha to C2 to C4 olefins

Disclosed are silicoaluminophosphates (SAPOs) having unique silicon distributions, a method for their preparation and their use as catalysts for the catalytic cracking of hydrocarbon feedstocks. More particularly, the new SAPOs have a high silica:alumina ratio, and are prepared from microemulsions containing surfactants.

Growing community of inventors

Kingwood, TX, United States of America

Philip Andrew Ruziska