Rohm and Haas Company

Dow Global Technolgoies LLC

Andrew Michael Lemonds

Donald Lee Zolotorofe

Scott S Han

Jinsuo Xu

Muhunthan Sathiosatham

Daniel J Martenak

Eric Gustave Lundquist

Leonard Edward Bogan, Jr

Sanjib Biswas

Mark A Silvano

Robert Wilczynski

Nelson I Quiros

Elsie Mae Vickery

Peter David Klugherz

Fernando Antonio Pessoa Cavalcanti

Raymond P Roach

Minh N Ngo

Robert Tengler

Sarah L Hruby

Nitin Chadda

Sarah M Hoyt

Edward C Bayer

David C Decoster

Hydroxycarboxylic acids, e.g., 3-hydroxypropionic acid, and/or their ammonium salts are dehydrated to their corresponding unsaturated carboxylic acids, e.g., acrylic acid, by a process that uses a catalyst comprising ammonium bisulfate. The use of ammonium bisulfate reduces or eliminates the problems associated with processes that use sulfuric acid as a dehydrating catalyst, e.g, excess sulfuric acid consumption and/or recovery.

Ammonium bisulfate catalyzed dehydration of beta-hydroxy acids

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

A method for producing &#x3b1;-, &#x3b2;-unsaturated carboxylic acid esters in high yield from reaction by-product streams via the catalytic conversion of the by-products to additional &#x3b1;-, &#x3b2;-unsaturated carboxylic acid ester product. The catalyst comprises cesium, and phosphorous as a promoter, on a porous support.

Process for production of methacrylic acid esters

A process for producing unsaturated carboxylic acids or unsaturated nitriles by vapor phase oxidation reaction of their corresponding Cto Calkanes, Cto Calkenes, and mixtures thereof, as a hydrocarbon starting material, wherein the process performance is monitored and the path of gasses through catalyst beds is altered. Improved catalyst lifetimes may be achieved.

Process for the (AMM)oxidation of lower molecular weight alkanes and alkenes

This invention provides a method for producing &#x3b1;,&#x3b2;-unsaturated carboxylic acid esters in high yield from acetone cyanohydrin and sulfuric acid through the separation and concurrent catalytic conversion of reaction side products to additional &#x3b1;,&#x3b2;-unsaturated carboxylic acid ester product. The catalyst comprises at least one Group IA element and may include a porous support and/or a promoter element selected from at least one of phosphorous, boron, titanium, zinc, zirconium, tin, bismuth, cerium, and alkaline earth metals. The method for producing methacrylic acid esters, such as methylmethacrylate (MMA), comprises the steps of: i) providing an alkyl alcohol and an organic traction comprising an alkyl methacrylate, an alkyl &#x3b1;-hydroxyisobutyrate and an alkoxyisobutyrate; ii) vaporizing at least a portion of the organic fraction and at least a portion of the alkyl alcohol; iii) contacting the vaporized organic fraction and alcohol with a catalyst comprising at least one element selected from the group consisting of lithium, sodium, potassium, rubidium, cesium and francium, to convert the alkyl ahydroxyisobutyrate and alkyl alkoxyisobutyrate to additional alkyl methacrylate and produce a mixture comprising alkyl methacrylate, methacrylic acid, alkyl alcohol, and water.

Process for production of methacrylic acid ester having increased yield

The present invention relates to a process for providing improved low VOC polymerizable compositions containing phosphoalkyl (meth)acrylate monomers which are synthesized by the reaction of a hydroxyalkyl (meth)acrylate with polyphosphoric acid (PPA).

Polymerizable compositions

The present invention provides a method for extractive recovery and conversion of selected compounds, such as methacrylic acid (MAA) and 2-methacrylamide (MAM), from a stream derived from purification of methyl methacrylate (MMA) or methacrylic acid (MAA) produced via a conventional ACH route process.

Process for recovering valued compounds from a stream derived from purification of methyl methacrylate

The present invention relates to an improved alkane (amm)oxidation process in which sulfur-bearing impurities present in the alkane feedstock are removed upstream from the (amm)oxidation reaction.

Method for producing unsaturated carboxylic acids and nitriles

The present invention relates to an improved process for the conversion of alkanes to unsaturated carboxylic acids.

Process for converting alkanes to unsaturated carboxylic acids

A mixed metal oxide, which may be an orthorhombic phase material, is regenerated, selectively enriched or selectively poisoned as a catalyst to reduce catalyst aging for the production of unsaturated carboxylic acids, or unsaturated nitrites, from alkanes, or mixtures of alkanes and alkenes, by contacting said mixed metal oxide with a an oxidizing gas such as oxygen, air, steam and combinations thereof is permitted to flow through the catalyst in a regenerator at a temperature of from 300&#xb0; C. to 600&#xb0; C. to form said regenerated catalyst.

Regeneration of mixed metal oxide catalysts

A process for oxidizing a hydrocarbon, which comprises subjecting the hydrocarbon to a liquid phase catalytic oxidation reaction in the presence of at least one oxidation catalyst to form an oxidized product.

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Schwenksville, PA, United States of America

Andrew Michael Lemonds