Exxonmobil Chemical Patents Inc.

Allen Scott Gawlik

Shifang Luke Luo

Robert G Tinger

Jeevan Sahib Abichandani

Glenn Allen Heeter

Terrance C Osby

Indulis J Eilands

John Di-Yi Ou

Mark W Nash

James Richardson Lattner

Stephen Harold Brown

Keith Holroyd Kuechler

Larry Lee Iaccino

Jeffrey Lawrence Brinen

Robert David Strack

Timothy Paul Bender

John D Ou

Glenn C Wood

Justin M Ellrich

John W Rebeck

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

The process relates to the use of any naphtha-range stream containing a portion of C8+ aromatics combined with benzene, toluene, and other non-aromatics in the same boiling range to produce toluene. By feeding the A8+ containing stream to a dealkylation/transalkylation/cracking reactor to increase the concentration of toluene in the stream, a more suitable feedstock for the methylation reaction can be produced. This stream can be obtained from a variety of sources, including the pygas stream from a steam cracker, 'cat naphtha' from a fluid catalytic cracker, or the heavier portion of reformate.

Method and apparatus for obtaining aromatics from diverse feedstock

A process and apparatus are provided for converting oxygenate to olefins which comprises: contacting a feedstock comprising oxygenate with a catalyst comprising a molecular sieve under conditions effective to produce a vaporous product comprising the olefins, water and unreacted oxygenate; condensing the vaporous product to provide a liquid stream rich in the water and unreacted oxygenate, and an olefins-rich vapor stream; introducing at least part of the liquid stream to a feed tray in a fractionation tower which provides an oxygenate-rich overhead product and a water-rich liquid bottoms product; providing a liquid, oxygenate-rich stream comprising at least about 20 wt % oxygenate above the feed tray; and passing the olefins-rich vapor stream through a recovery train to recover at least some of the olefins.

Recycling oxygenate-rich streams in oxygenate-to-olefin processes

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Houston, TX, United States of America

Allen Scott Gawlik