Arkema Inc.

Arkema France

Arkeme Inc.

Roger L Roundy

Olan Stanley Fruchey

William G Etzkorn

Fungau Ho

Nicolas Dupont

Christopher T Reeves

John L Steinbach

Michael Stanley DeCourcy

Dennis Wade Jewell

Michael S Decourcy

Patrick M Wiegand

Mahmood N A Jawaid

Timothy D Ligon

Mahmood Jawaid

Edmund J Yang

Michel Fauconet

Tao Wang

Stephane Denis

Samuel Marc Daniel

Dennis W Jewell

Salvador Aldrett-Lee

Diane E Allen

William C Brooks

Mahmood NA Jawaid

Samuel Daniel

The present disclosure relates to a single shell open interstage reactor ('SSOI'). The SSOI comprises a first reaction stage, an interstage heat exchanger, an open interstage region, and a second reaction stage. The SSOI may be configured for upflow or downflow operation. Further, the open interstage region of the SSOI may comprise a supplemental oxidant feed. When the open interstage region comprises a supplemental oxidant feed, the SSOI may further comprise a supplemental oxidant mixing assembly. Processes for producing acrylic acid through the oxidation of propylene are also disclosed.

Shell and tube oxidation reactor with improved resistance to fouling

An improved process for the manufacture of technical grade (meth)acrylic acid, e.g., acrylic acid, the process comprising producing a hydrated reaction product from the gas-phase oxidation of at least one (meth)acrylic acid precursor, e.g., propylene, followed by first dehydrating and then concentrating the reaction product, the improvement comprising controlling at least one of the water, acetic acid and (meth)acrylic acid content of the reaction product during the purification of the reaction product using on-line, near IR spectroscopy.

Control of a process for the purification of (meth)acrylic acid using on-line, near IR analysis

The present invention relates to methods by which the thermal dissociation of Michael adducts present in a stream of crude acrylic acid, called 'crude ester grade', and the esterification reaction of acrylic acid present in the stream of crude acrylic acid, or generated in situ by thermal dissociation, with a light alcohol, are carried out simultaneously.

Method for continuous production of light acrylates by esterification of a raw ester-grade acrylic acid

The process for the distillation of a gas mixture comprising (meth)acrylic acid obtained from the gas-phase oxidation of at least one (meth)acrylic acid precursors is improved through the use of coupled distillation columns. In a first column, the gaseous mixture is dehydrated while in a second column, the dehydrated gaseous mixture is distilled into product, overhead and bottoms streams.

Process for producing acrylic acid

Materials for making apparatus and a method of inhibiting polymerization during manufacture, purification, handling and storage of subject ethylenically unsaturated monomers are disclosed. In particular, copper or metals containing copper, in the presence of oxygen, have inhibit undesired polymerization resulting in polymer fouling in apparatus used during the manufacture, purification, handling and storage of the monomers, such as acrylic acid, methacrylic acid, acrylic acid esters and methacrylic acid esters. The copper or copper alloys as described herein, in the presence of an oxygen-containing gas, exhibit self-inhibiting surface characteristics when used to make at least a portion of the apparatus to inhibit polymerization of the monomers in contact with the portion of the apparatus including such copper-containing metal.

Metal surfaces to inhibit ethylenically unsaturated monomer polymerization

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Rosharon, TX, United States of America

Roger L Roundy