Uop Lcc

Patrick C Whitchurch

Paula L Bogdan

James E Rekoske

Robert B Larson

Jason T Corradi

John E Bauer

Dimitri A Trufanov

Stanley Joseph Frey

Suheil F Abdo

Gregory R Werba

Leonid Bresler

Patrick J Silady

Freddie Sandifer

Victor C Patton

Gregory J Gajda

Ian G Horn

Keith Allen Couch

James A Johnson

Rajeswar R Gattupalli

Joseph A Montalbano

Linda Shi Cheng

Wolfgang A Spieker

Geoffrey William Fichtl

Gregory B Kuzmanich

Michael H Quick

James T Wexler

Eseoghene Jeroro

Anton N Mlinar

Terrence E Deak

Rodrigo J Lobo

Abhishek M Pednekar

Ashish Suresh Bambal

Susan A Somers

Kathryn R Bjorkman

Hai Du

Phuong TM Do

Processes and apparatuses for producing a Caromatic isomer product are provided. The process comprises introducing a reformate stream comprising aromatic hydrocarbons to a reformate splitter column to provide a plurality of streams. One or more streams comprising at least one stream from the plurality of streams is passed to a reformate upgrading unit to obtain an upgraded reformate stream. The upgraded reformate stream is passed to an aromatics stripper column to provide an aromatics stripper sidedraw stream comprising Caromatic hydrocarbons. The aromatics stripper sidedraw stream is passed to a xylene separation unit to provide the Caromatic isomer product and a raffinate product stream. At least a portion of the raffinate product stream is processed in a liquid phase isomerization unit to obtain an isomerized stream.

Liquid phase isomerization process integration

Processes and apparatuses for producing a Caromatic isomer product are provided. The processes comprise introducing a raffinate product stream comprising Caromatic isomers to an isomerization unit to provide an isomerized stream. The isomerized stream is separated to provide a first stream comprising Cnaphthenes and Caromatic hydrocarbons and a second stream comprising Caromatic isomers. The first stream is passed to an extractive distillation column to provide a recycle feedstream comprising the Cnaphthenes and an extract stream comprising the Caromatic hydrocarbons. The recycle feedstream is passed to the isomerization unit.

Processes and apparatuses for naphthene recycle in the production of aromatic products

Processes and apparatuses for producing para-xylenes are provided. The processes comprises providing a reformate stream comprising aromatic hydrocarbons to a reformate splitter to provide a reformate bottoms stream and a reformate overhead stream. A portion of the reformate bottoms stream is passed to a para-xylene separation unit for separating para-xylene, wherein the portion of the reformate bottoms stream is passed to the para-xyelene separation unit without an intermediate step for removal of olefins.

Removal of feed treatment units in aromatics complex designs

The field of this claimed subject matter generally relates to liquid phase isomerization technology. More specification, the field relates to liquid phase isomerization in complete absence of hydrogen which eliminates the need for gas-liquid separation at the reactor outlet. Even in the absence of the hydrogen, the catalyst demonstrates a stable isomerization performance with a paraxylene to xylene ratio of about 23 wt % in the product stream.

Liquid phase xylene isomerization in the absence of hydrogen

A process for separating xylene from a feedstock in which the feedstock is separated into a xylene stream, a benzene rich stream and a light ends stream. Two separation zones may be utilized in which liquid from both is sent to a compression zone and the vapor from the compression zone is combined with a stream prior to the stream entering the second separation zone.

Process for recovering benzene and fuel gas in an aromatics complex

The present subject matter describes processes for increasing overall aromatics and xylenes yield in an aromatics complex. More specifically, the process for increasing overall aromatics and xylenes yield in an aromatics complex accomplishes the increased yields by incorporating an A-Aisomerization step into the aromatics complex. This isomerization integration increases the para-xylene.

Processes for increasing the overall aromatics and xylenes yield in an aromatics complex

Apparatuses and methods are provided for forming C8 aromatic streams with selected amounts of C9 aromatics. In one embodiment, a method for forming a C8 aromatic stream with a selected amount of C9 aromatics includes fractionating a hydrocarbon stream including C8 and C9 aromatics into a sidedraw fraction and a bottom fraction. The sidedraw fraction includes a portion of the C8 aromatics and a portion of the C9 aromatics. The bottom fraction includes remaining C8 aromatics and C8hydrocarbons. The method further includes fractioning the bottom fraction and forming a heavy overhead fraction including the remaining C8 aromatics. Also, the method includes combining the sidedraw fraction and the heavy overhead fraction to form a combined stream having a C9 aromatics composition of from about 0.1 wt % to about 5 wt % about 2 wt % of a total weight of the combined stream.

Apparatuses and methods for forming C8 aromatic streams with selected amounts of C9 aromatics

A process and apparatus for the production of at least one xylene isomer is provided. The process includes passing a first stream to one side of a split shell fractionation column and a second stream to the other side of the column. The second stream has a higher ratio of ethylbenzene to total Caromatics than the first stream. A first overhead stream from the one side is separated and passed as a mixed xylene product and a second overhead stream from the other side is separated and passed as feed to a para-xylene separation zone.

Processes and apparatuses for separating streams to provide a transalkylation feed stream in an aromatics complex

This invention is drawn to a process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene which contain a substantial concentration of nonaromatics using a catalyst system which features the ability to both convert nonaromatics and to obtain an improved yield of para-xylene from the mixture relative to processes of the known art.

Aromatics isomerization using a dual-catalyst system

This invention is drawn to a process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene using a catalyst comprising a zeolite having specific particle-size characteristics, a platinum-group metal and a silica binder. A relatively minimal amount of hydrogen is supplied to the process on a once-through basis, resulting in low saturation of aromatics while achieving effective xylene isomerization with reduced processing costs.

Selective aromatics isomerization process

Xylene isomerization processes, especially those processes in which ethylbenzene is also converted, are beneficially affected by adding benzene to the feed.

Xylene isomerization process and apparatus

One exemplary embodiment can be an ion-exchanged xylene isomerization catalyst. The ion-exchanged xylene isomerization catalyst can include:

Aromatic isomerization catalyst and a process of use thereof

One exemplary embodiment can be an extruded C8 alkylaromatic isomerization catalyst. The extruded catalyst can include: Generally, the weight percents of the MTW zeolite, the binder, the noble group metal, and the at least one alkali metal are based on a weight of the extruded catalyst.

Aromatic isomerization catalyst and isomerization process

One exemplary embodiment can be an extruded C8 alkylaromatic isomerization catalyst. The extruded catalyst can include:

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Sleepy Hollow, IL, United States of America

Patrick C Whitchurch