Rohm and Haas Company

Dow Global Technolgoies LLC

Dmitri A Kraptchetov

Kirk Walton Limbach

Christopher D Frick

Mark A Silvano

Scott S Han

Daniel A Hickman

Muhunthan Sathiosatham

Victor J Sussman

Daniel J Martenak

Alexey Kirilin

Andrew T Heitsch

Kirk W Limbach

Robert Wilczynski

Jeffrey A Herron

William G Worley

Zubin B Kuvadia

Nelson I Quiros

Reetam Chakrabarti

Stacy W Hoy, Iv

Wen-Sheng Lee

Minh N Ngo

Sarah L Hruby

D Wayne Blaylock

Kurt W Olson

James E Elder

Jeffery Alan Goodwin

David Chalfant

Timothy J Donnelly

Charles Como

Kirk K Limbach

Ramzy Shayib

Stacy W Hoy Iv

Jeffery Goodwin

Jeffrey Herron

A process for continuously removing water in situ from an oxidative esterification reaction is provided. The process includes (a) conducting a first oxidative esterification reaction in a first reactor or reaction zone, wherein the total number of reactors or reaction zones is n and n is at least 2; (b) removing a crude product stream from the first reactor or reaction zone; (c) introducing the crude product stream to a distillation column to generate a column overheads stream and a column bottoms stream; (d) passing a portion of the columns bottoms stream to the product recovery zone; and (e) passing a portion of the column overheads stream to a subsequent reactor or reaction zone. Steps (a)-(e) can be repeated.

Process for in situ water removal from an oxidative esterification reaction using a coupled reactor-distillation system

A process for the preparation of MMA via oxidative esterification in the presence of a catalyst comprising palladium, bismuth, and antimony.

Oxidative esterification process

A process for removing water from an oxidative esterification reactor includes (a) conducting an oxidative esterification reaction in a reactor; (b) removing a crude product stream from the reactor; (c) passing a first portion of the crude product stream directly to a product recovery zone; (d) introducing a second portion of the crude product stream to a distillation column to generate a column overheads stream and a column bottoms stream; (e) passing at least a portion of the columns bottoms stream to the product recovery zone; and (f) recycling a recycle stream comprising at least a portion of the overheads stream to the reactor; wherein the recycle stream contains less than 1 weight percent (wt %) water based on the total weight of the recycle stream, wherein the weight ratio of the first portion to the second portion is at least 1:10, and wherein the amount of the recycle stream recycled to the reactor is such that the reactor contains less than or equal to 2.5 wt % water, based on the weight of the reactor contents.

A catalyst comprising palladium, bismuth, and at least one third element X selected from the group consisting of P, S, Sc, V, Ga, Se, Y, Nb, Mo, La, Ce, and Nd, wherein the catalyst further comprises a support.

Oxidative esterification catalyst

A process for preparing dry methacrolein, and a process for producing methyl methacrylate are disclosed.

Dehydration process

A process for producing methyl methacrylate, the process comprising contacting reactants comprising methacrolein, methanol and an oxygen-containing gas, under reaction conditions in the presence of a solid catalyst comprising palladium, bismuth and at least one third element X, where X is selected from the group consisting of P, S, Sc, V, Ga, Se, Y, Nb, Mo, La, Ce, and Nd, wherein the solid catalyst further comprises a support selected from at least one member of the group consisting of silica, alumina, calcium carbonate, active carbon, zinc oxide, titanium oxide and magnesium oxide.

Preparation of methyl methacrylate via an oxidative esterification process

A process comprising for preparing Cto Calkyl(meth)acrylates, such as butyl acrylate, wherein vaporized reactor contents are fed directly to a column, the aqueous reflux ratio to the column is from 4 to 12, and the level of acrylic acid in the primarily organic phase separated from the overhead condensate of the column is less than 2000 ppm.

Acrylate production process

The application concerns a process comprising: (A) contacting a gas comprising oxygen, propane and propylene with at least one catalyst under reaction conditions sufficient to at least partially convert the propylene into a final product comprising acrylic acid; (B) feeding said final product to a separation column, in which the final product is split into a liquid stream, which is rich in acrylic acid, and a gaseous by-product stream comprising propane and propylene in a volume ratio of from 99.9:0.1 to 95:5; (C) contacting the gaseous by-product stream with oxygen in the presence of a catalyst under reaction conditions sufficient to at least partially convert propane to acrylic acid.

Method for preparing acrylic acid from propane and propylene

Growing community of inventors

Lansdale, PA, United States of America

Dmitri A Kraptchetov