Exxonmobil Chemical Patents Inc.

Indulis J Eilands

Robert G Tinger

Shifang Luke Luo

Jeevan Sahib Abichandani

Glenn Allen Heeter

Terrance C Osby

Allen Scott Gawlik

John Di-Yi Ou

Mark W Nash

Larry Lee Iaccino

John Roger Porter

John D Ou

In a process and system for treatment of feed stocks comprising alkylating agent and metal salts, the metal salts are removed from the feedstock by an efficient combination of separations processes. The processes may take place in one or more stages, each stage taking place in one or more vessels. Such treatment processes may remove 99.9% or more of metal salts from a feedstock, while recovering 99.9% or more of the alkylating agent from the feedstock for use in an alkylation reaction, especially of aromatics such as toluene and benzene. Preferred alkylating agents include methanol and mixtures of carbon monoxide and hydrogen, for methylation of toluene and/or benzene. The methylation proceeds over an aluminosilicate catalyst and preferably yields para-xylene with 75% or greater selectivity.

Treatment of aromatic alkylation feedstock

Process of producing para-xylene by alkylation of benzene and/or toluene including treatment of an alkylating agent to remove metal salts

The invention is directed to purification of an aromatic hydrocarbon stream including selective removal of phenol from a process stream comprising aromatic hydrocarbon mixtures, especially aromatic hydrocarbon mixtures that contain higher-than-equilibrium paraxylene, by contact with suitable adsorbents, to provide a product stream having lower concentration of phenol than said process stream.

Phenol removal in paraxylene recovery process

The invention relates to removal of styrene from hydrocarbon mixtures, and more particularly, removal of styrene from hydrocarbon mixtures containing higher than equilibrium paraxylene concentrations.

Styrene removal in paraxylene recovery process

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League City, TX, United States of America

Indulis J Eilands