Rohm and Haas Company

Donald Alan Ebert

Timothy Allen Hale

James Elder

Jinsuo Xu

Peter David Klugherz

James Clarence Day

Thomas Albert Kaminski

Charles Michael Lonzetta

Justin Rose

Brian Robert Keyes

Michael Stanley DeCourcy

Robert Michael Mason

Keith Frederick Briegel

Josefina Tseng Chapman

Jamie Jerrick John Juliette

Chorng-Shyuan Tsay

Elaina Lashae Williams

John Dempster Sornson

Michael Stanley Decourcy

Provided is a process for preparing acrylic acid comprising (1) preparing acrolein by catalytic gas phase oxidation comprising (a) providing a reaction gas comprising (i) 5 to 10 mol % propylene, (ii) 0.02 to 0.75 mol % propane, and (iii) 0.25 to 1.9 mol % of a fuel mixture comprising at least one of methane and ethane, wherein the molar ratio of the total amount of propane, methane, and ethane to the total amount of propylene is from 0.01:1 to 0.25:1, (b) contacting the reaction gas with a first mixed metal oxide catalyst to form a mixture comprising acrolein, wherein the first mixed metal oxide catalyst comprises one or more of molybdenum, bismuth, cobalt, and iron, and (2) contacting the acrolein mixture with a second mixed metal oxide catalyst to form a mixture comprising acrylic acid, wherein the second mixed metal oxide catalyst comprises one or more of molybdenum, vanadium, tungsten, copper, and antimony.

Method for preparing acrylic acid

Provided is a process for preparing acrolein by catalytic gas phase oxidation comprising (a) providing a reaction gas comprising (i) 5 to 10 mol % propylene, (ii) 0.02 to 0.75 mol % propane, and (iii) 0.25 to 1.9 mol % of a fuel mixture comprising at least one of methane and ethane, wherein the molar ratio of the total amount of propane, methane, and ethane to the total amount of propylene is from 0.01:1 to 0.25:1, and (b) contacting the reaction gas with a mixed metal oxide catalyst comprising one or more of molybdenum, bismuth, cobalt, and iron.

Method for preparing acrolein

A process for the high yield production of high purity glacial methacrylic acid ('HPMAA') with minimization of decomposition of hydroxy isobutyric acid (HIBA). The HPMAA is substantially pure, specifically 99% pure or greater with a water content of 0.05% or less. This improved process involves the steps of providing a crude MAA stream which was formed by hydrolyzing acetone cyanohydrin and, therefore, includes HIBA which is an intermediate product of the hydrolysis reaction, and purifying that crude methacrylic acid stream in a series of successive distillation steps.

Process for manufacturing high purity methacrylic acid

This invention relates to an improved process for preparing acrylic acid from propylene using a tandem reactor and utilizing an increased amount of propylene reactant, thereby providing increased capacity and throughput. An improved process for purifying acrylic acid is also disclosed.

Process for preparing and purifying acrylic acid from propylene having improved capacity

This invention relates to a process for preparing acrylic acid which utilizes an aqueous stream which includes recycled wastewater, at least part of which is stripped of undesirable components in a stripping column prior to being recycled to an acrylic acid absorber.

Process for preparing (meth)acrylic acid

This invention relates to an improved process for preparing acrylic acid from propylene using a single reactor utilizing an increased amount of propylene reactant thereby providing increased capacity and throughput.

Single reactor process for preparing acrylic acid from propylene having improved capacity

Growing community of inventors

Houston, TX, United States of America

Donald Alan Ebert