Arkema Inc.

Arkeme Inc.

Christopher T Reeves

Olan Stanley Fruchey

William G Etzkorn

Roger L Roundy

Fungau Ho

Dennis Wade Jewell

Patrick M Wiegand

Timothy D Ligon

Mahmood N A Jawaid

Mahmood Jawaid

Edmund J Yang

Nathan E Shirley

Hector J Barea

William C Brooks

Dennis W Jewell

Mahmood NA Jawaid

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 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

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Durham, NC, United States of America

Christopher T Reeves