Rohm and Haas Company

Abraham Benderly

Anne Mae Gaffney

Michael Stanley DeCourcy

Mark A Silvano

Ronald Eugene Myers

Scott S Han

Rajiv Monohar Banavali

Donald Lee Zolotorofe

I-Hwa Midey Chang-Mateu

Keith Frederick Briegel

Jose Antonio Trejo

Alan E Sopchik

Chorng-Shyuan Tsay

Nitin Chadda

Heather Granzin Thompson

Donald Robert Weyler

Diana Elaine Chase

Nicole Rendon Koegel

Douglass Sevon

Makarand Dattatraya Phadke

Michael R Ryan

Audrey Bravo

Jimmy Tai-Nin Chow

Parviz Taami-Ala

Daniel Joseph Martenak

The present invention relates to an integrated process for producing unsaturated carboxylic acids from the corresponding C-Calkane. The process begins with performance of thermally integrated dehydrogenation reactions which convert a C-Calkane to its corresponding C-Calkene, and which involve exothermically converting a portion of an alkane to its corresponding alkene by oxidative dehydrogenation in an exothermic reaction zone, in the presence of oxygen and a suitable catalyst, and then feeding the products of the exothermic reaction zone to an endothermic reaction zone wherein at least a portion of the remaining unconverted alkane is endothermically dehydrogenated to form an additional quantity of the same corresponding alkene, in the presence of carbon dioxide and an other suitable catalyst. The alkene products of the thermally integrated dehydrogenation reactions are then provided to a catalytic vapor phase partial oxidation process for conversion of the alkene to the corresponding unsaturated carboxylic acid or nitrile. Unreacted alkene and carbon dioxide are recovered from the oxidation product stream and recycled back to the thermally integrated dehydrogenation reactions.

Integrated process for preparing a carboxylic acid from an alkane

Alkenes, unsaturated saturated carboxylic acids, saturated carboxylic acids and their higher analogues are prepared cumulatively from corresponding alkanes utilizing using a multi-staged catalyst system and a multi-stage process which comprises steam cracking of alkanes to corresponding alkenes at flame temperatures and at short contact times in combination with one or more oxidation catalysts for catalytically converting the corresponding alkenes to further corresponding oxygenated products using short contact time reactor conditions.

Multi-staged catalyst systems and process for converting alkanes to alkenes and to their corresponding oxygenated products

A method for producing a mixture of ethylene and carbon monoxide by contacting ethane and an oxygen source at a temperature of at least 500&#xb0; C. to produce ethylene and carbon monoxide. A method for producing an alkyl propionate by steps of: (a) contacting ethane and an oxygen source at a temperature of at least 500&#xb0; C. to produce ethylene; (b) contacting an alcohol, ethylene and carbon monoxide with an ethylene carbonylation catalyst to produce the alkyl propionate; and (c) separating the alkyl propionate from byproducts and starting materials. The method further comprises condensing the alkyl propionate with formaldehyde to produce an alkyl methacrylate.

Processes for producing ethylene and carbon monoxide mixtures from ethane

A method for transesterification of triglycerides, especially those containing free fatty acids, with methanol. The method uses a catalyst derived from an acidic ion exchange resin. The catalyst is contacted with a reaction mixture containing a triglyceride and methanol under conditions suitable for transesterification.

Method for transesterification of triglycerides

The inventors have discovered catalyst ignition promoters comprising one or more activated metals. The catalyst ignition promoters are easily prepared from a number of metal sources, including spent catalysts, are activated quickly and provide effective catalyst ignition independent of the quality of the metals that comprise the catalytic converter. The one or more activated metals comprising the ignition promoter are prepared by contacting them with one or more chemical treatments. The activated metal components are prepared into suitable articles, referred to as ignition strips, that are placed in contact with one or more oxidative coupling catalysts, typically in the form of gauzes. The ignition promoters reduce the activation energy for catalyst ignition (also referred to 'light off'), enabling ignition of catalyst gauzes that are new, used, contaminated, damaged and combinations thereof at a relatively low auto-ignition temperatures.

Activated ignition promoters for metal catalyzed reactions

An improved process for ammonia recovery is provided for the recovery of substantially pure ammonia for use in industrial processes. In this improved method, specific raw materials and/or specific materials of construction are used. Overall efficiency and operational cost savings are increased as a result of the process of the present invention.

Process for ammonia recovery

This invention utilizes a mixed salt transesterification catalyst in a transesterification process for the production of esters of alkyl(meth)acrylate monomers.

Transesterification process for production of (meth)acrylate ester monomers

A method is provided herein for purifying (meth)acrylic acid to provide a purified (meth)acrylic acid product having a low aldehyde concentration and not more than 0.2 wt % water. One embodiment of the method includes distilling (meth)acrylic acid in the presence of an aldehyde treating compound. Another embodiment of the method includes also distilling crude (meth)acrylic acid in the presence of a reactive drying agent. (Meth)acrylic acid produced in this manner is especially suitable for use in specialty (meth)acrylic acid polymers, such as for example superabsorbent polymers, binders, and ethylene-(M)AA copolymers.

Process for manufacturing reduced water content (meth)acrylic acid

Unsaturated carboxylic acids (and esters thereof) are prepared directly from alkanes (and alcohols) utilizing vapor phase oxidative esterification.

Preparation of unsaturated carboxylic acids and unsaturated carboxylic acid esters from alkanes and/or alkenes

Method and apparatus for preventing iron contamination in corrosive service

A high yield process for the production of methyl methacrylate or methacrylic acid and an apparatus for increasing the yield in a process for the production of methyl methacrylate or methacrylic acid are disclosed.

Apparatus and process for the high yield production of methyl methacrylate or methacrylic acid

Hydrogen cyanide or ammonia present in a gaseous stream is decomposed catalytically in the presence of oxygen at relatively low temperature by contact with carbonaceous adsorbents doped with oxides of first row transition metals, silver or lanthanide elements, preferably with cobalt, chromium, manganese, silver, and cerium, in the presence or absence of a gaseous reducing agent such as a hydrocarbon or a volatile carboxylic acid.

Process for the decomposition of hydrogen cyanide, ammonia, or mixtures

A method for inhibiting the corrosion of metals exposed to aqueous mixtures of sulfuric acid and hydrocyanic acid by the use of iron salts.

Growing community of inventors

Elkins Park, PA, United States of America

Abraham Benderly