Rohm and Haas Company

Minh N Ngo

Reetam Chakrabarti

Muhunthan Sathiosatham

James Elder

Mark A Silvano

Sarah L Hruby

Donald Lee Zolotorofe

Dmitry A Krapchetov

Andrew Michael Lemonds

Dmitri A Kraptchetov

Dmitri A Krapchetov

Charles Como

Andrew M Lemonds

A method for preparing methyl acrylate comprises:

Acid catalyzed synthesis of methyl acrylate from acrylic acid and methanol

A method for preparing methyl acrylate comprises heating in a reaction zone a mixture comprising acrylic acid, methanol, and an acid catalyst to react and form a reaction product comprising methyl acrylate which is vaporized with other light components and then fed to a distillation zone. A feed stream entering the reaction zone comprises methanol and acrylic acid in a molar ratio of greater than 1 and less than 2, and a residence time in the reaction zone ranges from 0.25 to 2 hours. A distillate from the distillation zone is condensed and phase-separated to form an organic phase comprising methyl acrylate and an aqueous phase. A portion of the organic phase is returned to the distillation zone as organic reflux. The remainder of the organic phase and the aqueous phase of the distillation zone is fed to an extraction column to form a methanol rich aqueous effluent and an organic effluent comprising methyl acrylate. The organic effluent from the extraction column is purified in a single finishing column, wherein a light ends stream is removed from the top of the finishing column, a bottoms stream is removed from the bottom of the finishing column, and methyl acrylate is removed from a side draw stream.

Provided is a process for preparing dry methacrolein which maximizes capture of methanol. Also provided is a process for producing methyl methacrylate.

Process for preparing methacrolein

A multistage process for the preparation of methacrylic acid and esters thereof via the hydrolysis of ACH, cracking the hydrolysis products, and converting the cracked products to the desired acid or ester, wherein the average temperature in the first hydrolysis reactor is from 55 C to 70 C.

Process for producing MMA and/or MAA from acetone cyanohydrin and sulfuric acid

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Philadelphia, PA, United States of America

Minh N Ngo