Glitsch, Inc.

Gtc Technology US LLC

Sulzer Management Ag

Hfm International, Inc.

Gtc Technology LP

Glitsch International, Inc.

Joseph C Gentry

Fu-Ming Lee

Rahul Khandelwal

Ronald G Gualy

Manfred Stepanski

Randi Wytcherley

Mircea Cretoiu

Erik Temmel

Zhongyi Ding

Manish Bhargava

Weihua Jin

Claudia Pudack

B Bryant Slimp, Jr

Randa W Wytcherley

Christoph Kirschner

Meta Naulita-ellis

Kimberly Anderson

Celine Rioual

Roomi Kalita

Pradeep Pawar

Song Wang

Calambur Shyamkumar

Fernando Varela

Wiston Lamshing

John C McIntyre

Lloyd T Berg

Michael J Binkley

Randi W Wytcherley

Timothy L Holmes

Venkata K Ramanujam

George A Ball

Michael McCaulley

Joseph P Weller

Mark Lockhart

John R H Wilson

Meritxell Guino

Pinti Wang

Lucia Cretoiu

Stephen G Norwood

A process for preparing a purified benzene composition from a crude hydrocarbon stream containing at least 10% by volume of benzene is provided. The process comprises subjecting the crude hydrocarbon stream and a further recycled benzene containing stream to a solvent-based extraction so as to produce a benzene enriched aromatic stream and a benzene depleted non-aromatic stream, subjecting the benzene enriched aromatic stream to a hydrodesulfurization so as to obtain a desulfurized aromatic stream, subjecting the desulfurized aromatic stream to a distillation producing a purified benzene stream and a further benzene containing stream having a benzene concentration of between less than 100% by weight and the azeotropic benzene concentration, and at least partially recycling the further benzene containing stream.

Process and plant for preparing purified benzene composition from crude hydrocarbon stream containing benzene

A method for preparing a purified styrene composition includes providing a crude hydrocarbon composition containing styrene, subjecting the crude hydrocarbon composition to a distillation in a divided-wall column to produce an overhead hydrocarbon stream, a bottom hydrocarbon stream and a side hydrocarbon stream and subjecting the side hydrocarbon stream to at least one crystallization step to obtain a purified styrene composition.

Process and apparatus for preparing purified styrene composition using divided-wall column and crystallization unit

A method for preparing a purified styrene composition with a styrene yield of at least 80%. The method comprises providing a crude composition containing styrene, and subjecting the crude composition to at least one crystallization step. The at least one crystallization step comprises at least one static crystallization stage and at least one dynamic crystallization stage.

Process and apparatus for preparing purified styrene composition from styrene containing feedstock

A method for preparing a purified styrene composition is provided. The method includes providing a crude composition and subjecting the crude composition to at least one crystallization step. The crude composition contains 70% by weight or more styrene based on the total weight of the crude composition. The at least one crystallization step comprises at least one of a static crystallization stage and a dynamic crystallization stage. The crude composition contains at least one impurity selected from the group consisting of: color inducing species, oxygenates, sulfur species, alpha-methylstyrene, and mixtures thereof.

The invention is directed to a combined naphtha hydrotreating (NHT) and isomerization process scheme, which includes dividing wall columns (DWC) that replace multiple distillation columns and allow optimized heat integration within the system. The disclosed design provides reductions in both capital and energy costs compared to conventional schemes.

Use of top dividing wall in isomerization unit

Embodiments of the invention are directed to a process wherein two different unit operations (absorption and distillation) take place on either side of a top dividing wall column. One side of the dividing wall column uses absorption to separate non-condensable components from the feed; the other side of the dividing wall uses distillation to separate heavier liquid components.

Method of carrying out absorption/distillation in a single column design

Methods and processes for producing paraxylene from catalytic cracking hydrocarbons, particularly Cand Cstreams, are disclosed. Each of the processing steps may be tailored to the overall objective of high paraxylene yield from a relative inexpensive feedstock.

Processes and systems for obtaining aromatics from catalytic cracking hydrocarbons

Apparatuses, systems and methods for extracting isoprene using minimum capital investment, operating cost, and relatively corrosion free environment are disclosed herein. Embodiments of the invention are directed to producing pure isoprene and gasoline quality raffinate (free or sulfur and acetylenes) which are of value in manufacturing rubbers and other polymers.

Process for recovering isoprene from pyrolysis gasoline

The inventive process is directed to the production of xylenes through integration of aromatics methylation and transalkylation. This integrated process maximizes the production of xylenes and eliminates or minimizes the production of benzene.

Process for production of xylenes through integration of methylation and transalkylation

Apparatuses and systems for removing heavy hydrocarbons from a solvent stream are disclosed herein. The apparatuses extract heavy hydrocarbons into light hydrocarbons and provide a solvent stream having the heavy hydrocarbons removed. Two water washing steps are used to remove residual solvent from the heavy hydrocarbon solution in light hydrocarbons. In some embodiments, the second water wash is used for processing subsequent batches of the solvent stream. The heavy hydrocarbons and solvent can be recovered and processed further. Methods for removing heavy hydrocarbons from a solvent stream are also disclosed herein.

Heavy hydrocarbon removal systems and methods

Various embodiments of the invention herein described generally relate to novel processes for the production of aromatic acids by fixed bed catalytic oxidation of aromatic compounds carrying at least one oxidizable substituent group attached directly to the carbon atom of the corresponding aromatic nucleus. In an embodiment, a novel oxidation process of the present invention comprises the steps of: a) catalytically oxidizing, with an oxidation catalyst, a liquid phase aromatic acid precursor in the presence of a gaseous oxygen source; b) separating a finished product; c) purging the solvent and the oxidation catalyst; d) optionally recycling at least a portion of the solvent into the oxidation reactor; e) recovering at least a portion of the oxidation catalyst; f) recharging the at least a portion of the oxidation catalyst over a solid recharging catalyst bed; and (g) feeding a reactivated oxidation catalyst to the oxidation reactor.

Catalyst systems for the production of acids

An improved process for the recovery of aromatic compounds from a mixture containing aromatic and non-aromatic compounds and method for retrofitting existing equipment for the same is provided. The improved process comprises the steps of recovering aromatic compounds via parallel operation of a hybrid extractive distillation/liquid-liquid extractor operation and variations thereof. Methods of quickly and economically retrofitting existing recovery process equipment for use with the improved aromatics recovery process are also disclosed.

Aromatics separation process and method of retrofitting existing equipment for same

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Houston, TX, United States of America

Joseph C Gentry