Gtc Technology US LLC

Scg Chemicals Company Limited

Sulzer Management Ag

Sulzer Gtc Technology US Inc.

Zhongyi Ding

Weihua Jin

Joseph C Gentry

Sachin Joshi

Alisa Kammafoo

Attapong Thirasak

Mircea Cretoiu

Arnat Prombunglum

Wiroon Tanthapanichakoon

Joseph P Weller

Cole Nelson

Amy Sealey

George A Ball

Andrei Cimpeanu

Calambur Shyamkumar

John R H Wilson

Worawut Tamthaisong

Meritxell Guino

Purachet Pitipuech

Joseph Chiu

Joseph G Gentry

Mark Lockhart

Pinti Wang

Para-xylene production processes are disclosed, with such processes being integrated with extractive distillation or other separation to effectively separate, for example to remove and recover, ethylbenzene and other components that co-boil with the isomers of xylene. This allows for xylene isomerization, downstream of the separation of para-xylene from its other isomers, to be operated under milder conditions (e.g., liquid phase, absence of added hydrogen) without the need for ethylbenzene conversion. The associated decreased yields of byproducts such as light gases and non-aromatic hydrocarbons, together with the generation of purified ethylbenzene having value for styrene monomer production, can significantly improve overall process economics.

Integrated processes for para-xylene production

Extractive agent compounds are disclosed, with exemplary compounds having Formula (I): wherein Rand Rare independently selected from the group consisting of an oxygen radical, a hydrogen radical, and a hydrocarbyl radical having from about 1 to about 20 carbon atoms, and wherein R-Rare independently selected from the group consisting of halo, a hydrogen radical, and a hydrocarbyl radical having from about 1 to about 20 carbon atoms, and further wherein at least two of R-Rare halo. Also disclosed are extractive distillation processes, comprising distilling a liquid mixture comprising ethylbenzene, a further Caromatic compound, and an extractive agent compound as described herein. The extractive agent contributes to improved separability of ethylbenzene from the further Caromatic compound. The separability may be quantified in terms of increasing relative volatility of ethylbenzene to the further Caromatic compound or may alternatively be quantified in terms of a competitive factor, D, as described herein.

Process for the separation of ethylbenzene from other Caromatic compounds

A process for the distillative separation of ethylbenzene from a mixture comprising ethylbenzene and at least one other C8 aromatic compound, comprising introducing a feed stream comprising said mixture into a first distillation column, introducing a first stream comprising a heavy solvent above the feed stream into the first distillation column, introducing an aqueous stream below the feed stream into the first distillation column.

Process for the enhanced separation of ethylbenzene

Process for the distillative separation of ethylbenzene from a mixture comprising ethylbenzene and at least one other C8 aromatic compound, comprising distilling said mixture in a distillation column in the presence of an extractive solvent, characterized in that the distillation column is operated at a sub-atmospheric pressure.

Separation process for C8 aromatics mixture

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

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

Various embodiments of the present invention generally disclose systems and processes for the conversion of a feed stream comprising at least one C8 aromatic into a product stream comprising isophthalic acid and purified terephthalic acid (IPA/TA).

Systems and processes for the production of isophthalic acid and terephthalic acid

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

A process to convert glycerin into propylene glycol and purifying the produced propylene glycol is described. The glycerin-based propylene glycol production requires only one process step compared to petroleum/natural gas-based propylene glycol production requires multiple process steps, and thus represents a cost savings.

Process for converting glycerin into propylene glycol

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Katy, TX, United States of America

Zhongyi Ding