Mobil Oil Corporation

Other

Bernard S Wright

Hartley Owen

Chung H Hsia

Samuel A Tabak

Susan K Marsh

Nicholas Daviduk

Ronald M Gould

Chung-Hueng Hsia

Chung-hweng Hsia

An integrated process for converting methanol and other lower molecular weight oxygenates to gasoline and distillate range liquid hydrocarbons and ethene is disclosed. When it is desirable to increase ethene yield, an auxiliary methanol-to-olefins (MTO) fixed bed reactor unit is activated in conjunction with a continuously operated primary MTO fluidized bed reactor.

Multistage process for converting oxygenates to liquid hydrocarbons and

An integrated process is provided for converting methanol, dimethylether or the like to heavy hydrocarbon products, especially distillate range hydrocarbons. In a first stage catalytic process oxygenate feedstock is converted to lower olefins. C.sub.3.sup.+ olefins are selectively sorbed in an interstage sorption fractionator and passed along with gasoline sorbent to a second stage oligomerization reactor. Distillate range hydrocarbons are useful as diesel fuel or the like.

Multistage process for converting oxygenates to distillate hydrocarbons

An improved catalytic process for converting an olefinic feedstock comprising ethylene and C.sub.3.sup.+ olefins to heavier liquid hydrocarbon product comprising the steps of:

Olefin fractionation and catalytic conversion system

In the conversion of light olefins to heavier hydrocarbons, an improved recovery technique is provided for selectively removing unreacted light olefins from a catalytic reactor effluent. This system is useful in converting ethene-rich feedstocks to gasoline and/or distillate products, particularly in oligomerization processes employing shape selective siliceous catalysts such as ZSM-5 type zeolites. By recycling gasoline-range hydrocarbons as a sorbent liquid, unreacted C.sub.2.sup.+ components may be absorbed from reactor effluent vapor and returned for further contact with the catalyst.

Catalytic reactor system for conversion of light olefin to heavier

A staged reactor technique for converting ethene-rich olefinic feedstock to heavier hydrocarbons, particularly gasoline and distillate range products. By employing low temperature and high temperature separators, an economic recycle is provided for each stage.

Multistage process for converting olefins to heavier hydrocarbons

A multistage reactor system and operating technique for converting ethene-rich olefinic feedstock to heavier hydrocarbons, particularly gasoline and distillate range products. By employing low temperature and high temperature separators, an economic recycle is provided for each stage.

Multistage system for converting olefins to heavier hydrocarbons

A continuous catalytic system for converting an olefinic feedstock comprising ethylene and C.sub.3.sup.+ olefins to heavier liquid hydrocarbon product comprising apparatus for

A heat balanced system for converting an olefinic feedstock comprising ethylene and C.sub.3.sup.+ olefins to heavier liquid hydrocarbon product in a catalytic exothermic process. Means are provided for prefractionating the olefinic feedstock to obtain a gaseous stream rich in ethylene and a liquid stream containing C.sub.3.sup.+ olefin, and a reactor for contacting an olefinic feedstock stream from the prefractionating step with ZSM-5 type oligomerization catalyst in a series of exothermic catalytic reactors to provide a heavier hydrocarbon effluent stream comprising distillate, gasoline and lighter hydrocarbons. In a preferred embodiment a catalytic system is provided for making gasoline or diesel fuel from an olefinic feedstock containing ethylene and C.sub.3.sup.+ lower olefins comprising a prefractionation system for separating and recovering ethylene and a liquid stream rich in C.sub.3.sup.+ olefins; a multi-stage adiabatic downflow reactor system operatively connected for serially contacting olefinic feedstock with a plurality of fixed shape selective oligomerization catalyst beds; means for thermally exchanging hot reactor effluent from at least one catalyst bed with at least a portion of a prefractionation liquid stream for reboiling the liquid stream; and means for recovering gasoline and diesel product from the catalytic system.

Olefin fractionation and catalytic conversion system with heat exchange

A multi-reactor hydrocarbon catalytic conversion system includes at least three reactors, a feed source for providing hydrocarbon feed to the reactors and apparatus for sequentially backwardly rotating the reactors during process mode operation of the reactors. In each of a series of sequential cycles, at least one reactor currently operates in a regeneration mode position, while other reactors operate in process mode positions. A reactor having freshest catalyst is in a last process mode position, and a reactor having relatively least fresh catalyst is in a first process mode position. The reactor having relatively least fresh catalyst receives fresh feed first from the feed source, and the reactor having freshest catalyst receives the partially converted feed last. Method and apparatus are provided for rotation of the reactors, without the necessity of stopping operation of the catalytic conversion process while the shifting of the reactors is being performed. Heat exchangers are provided to control the inlet temperature of effluent provided to downstream reactors. The heat exchangers can occupy fixed process positions or, alternatively, can swing with the reactors in the sequential rotation process.

Technique for sequential rotation of reactors in a multi-reactor

A methanol-to-gasoline (MTG type) conversion process in which the conversion is conducted in a fixed bed catalytic reactor. A C.sub.3 -C.sub.4 hydrocarbon diluent is generated from the effluent in a series of steps and recycled to the fixed bed reactor in order to dissipate the heat of reaction.

Conversion of methanol to gasoline

A methanol-to-gasoline (MTG) catalytic conversion system in which the conversion is conducted in a fixed bed catalytic reactor. A C.sub.3 -C.sub.4 hydrocarbon diluent is generated from pressurized liquid effluent and recycled to the fixed bed reactor in order to dissipate the heat of reaction.

System for conversion of methanol to gasoline

Alkylate is produced by catalytically converting oxygenate feedstock, such as methanol, to lower olefins comprising C.sub.2 -C.sub.4 olefins. Ethene is separated by interstage sorption of C.sub.3 + components and an isoparaffin is alkylated with C.sub.3 -C.sub.4 olefins derived from sorbate. The system comprises means for fractionating an olefinic feedstream containing ethene and C.sub.3 + olefinic components by contacting the olefinic feedstream in a sorption zone with a liquid hydrocarbon sorbent to selectively sorb C.sub.3.sup.+ components; means for reacting C.sub.3.sup.+ olefins with excess isoparaffin in a catalytic alkylation reactor to produce C.sub.7 + alkylate hydrocarbons; fractionating the alkylation reactor effluent to provide a liquid hydrocarbon fraction rich in C.sub.7.sup.+ alkylate. Liquid recycle or C.sub.5.sup.+ liquid coproduced with the lower olefin may be passed to the sorption zone as lean sorbent. C.sub.7.sup.+ alkylate product and C.sub.5.sup.+ gasoline are recovered from the process.

Integrated reactor system for converting oxygenates to alkylated liquid

Alkylate is produced by catalytically converting oxygenate feedstock, such as methanol, to lower olefins comprising C.sub.2 -C.sub.4 olefins. Ethene is separated by interstage sorption of C.sub.3 + components and an isoparaffin is alkylated with C.sub.3 -C.sub.4 olefins. The improved technique comprises fractionating an olefinic feedstream containing ethene and C.sub.3 + olefinic components by contacting the olefinic feedstream in a sorption zone with a liquid hydrocarbon sorbent to selectively sorb C.sub.3 + components; reacting C.sub.3 + olefins with excess isoparaffin in a catalytic alkylation reactor to produce C.sub.7 + alkylate hydrocarbons; fractionating the alkylation reactor effluent to provide a liquid hydrocarbon fraction rich in C.sub.4 + isoparaffin for recycle to the sorption zone as lean sorbent; and recovering C.sub.7 + alkylate product from the process.

Synthesis process for producing alkylate hydrocarbons

A continuous process for upgrading C.sub.3 -C.sub.4 hydrocarbon feed containing olefins to produce heavier liquid hydrocarbons comprising converting a major portion of C.sub.3 -C.sub.4 olefins in an oligomerization zone by contacting a shape selective medium pore zeolite catalyst at elevated temperature and pressure to make distillate and olefinic gasoline; fractionating the oligomerization stage effluent to provide distillate and gasoline product and a C.sub.3 -C.sub.4 intermediate stream containing isobutane and unconverted propene and butylene; and combining the C.sub.3 -C.sub.4 intermediate stream with a portion of C.sub.3 -C.sub.4 feed and further converting the combined streams in an alkylation zone to make heavier paraffinic hydrocarbons. The olefin feed may be produced by catalytically converting methanol or similar oxygenated hydrocarbons in a known process.

Process for converting olefins to gasoline, distillate and alkylate

Alkylate is produced by catalytically converting oxygenate feedstock, such as methanol, to lower olefins comprising C.sub.2 -C.sub.4 olefins. Ethene is separated by interstage sorption of C.sub.3 + components and an isoparaffin is alkylated with C.sub.3 -C.sub.4 olefins derived from sorbate. The improved technique comprises fractionating an olefinic feedstream containing ethene and C.sub.3 + olefinic components by contacting the olefinic feedstream in a sorption zone with a liquid hydrocarbon sorbent to selectively sorb C.sub.3 + components; reacting C.sub.3 + olefins with excess isoparaffin in a catalytic alkylation reactor to produce C.sub.7 + alkylate hydrocarbons; fractionating the alkylation reactor effluent to provide a liquid hydrocarbon fraction rich in C.sub.7 +, alkylate for recycle to the sorption zone as lean sorbent; and recovering C.sub.7 + alkylate product and C.sub.5 + gasoline from the process.

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East Windsor, NJ, United States of America

Bernard S Wright