Exxonmobil Chemical Patents Inc.

Terrance C Osby

Robert G Tinger

Shifang Luke Luo

Jeevan Sahib Abichandani

Glenn Allen Heeter

Allen Scott Gawlik

Indulis J Eilands

John Di-Yi Ou

Mark W Nash

Paul Hamilton

Brian W Heins

John D Ou

Ronald Joseph Cimini

Michael Louis Hergenrother

Steven M Slack

John R DeLaney

Robert Piszczek

Joseph S Famolaro

Nikki L Griggs

Thomas E Hewitt, Iii

Dion Zhang

Zhongcheng Wang

Jason A Nichols

Jackie S Thompson

The invention relates to Chydrocarbon conversion. More particularly, the invention relates to separating a vapor phase product and a liquid phase product from a heated mixture that includes steam and Chydrocarbons, catalytically cracking the liquid phase product and steam cracking the vapor phase product.

Process for Chydrocarbon conversion

Many linear alpha olefin (LAO) syntheses form a range of LAO products when oligomerizing ethylene in the presence of a Ziegler-type catalyst. The range of products typically requires a plurality of distillation columns to separate the LAO products up to a desired carbon count, but such approaches may be energy- and capital-intensive. LAO product separation using at least one dividing wall column may lessen these burdens. Methods for separating LAOs may comprise: providing a pre-processed product stream comprising Cg+ linear alpha olefins (LAOs) to a first of a series of distillation columns, at least one member of the series of distillation columns comprising a dividing wall column; and separating an overhead stream comprising a first LAO from the dividing wall column and one or more side streams from the dividing wall column, each side stream comprising a different LAO that also differs from the first LAO.

Process for the separation of linear alpha-olefins using a dividing wall column

Linear alpha olefins (LAOS) may be formed by oligomerization of ethylene in the presence of a Ziegler-type catalyst. The presence of trace water during oligomerization can result in unwanted formation of insoluble higher oligomers or polymer. Methods for limiting the presence of water during ethylene oligomerization reactions may include separating residual ethylene and 1-butene from an LAO product stream to form a higher LAO-enriched stream comprising CLAOs, separating 1-hexene as an overhead stream from the higher-LAO enriched stream using a first distillation column, obtaining separated solvent as a side stream from the first distillation column or as a side stream from a first of one or more downstream distillation columns, and returning the separated solvent to a reactor in a recycled solvent stream. The recycled solvent stream passes through one or more driers before returning to the reactor.

Methods for limiting water in recycled solvent during linear alpha olefin syntheses

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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Manvel, TX, United States of America

Terrance C Osby