W. R. Grace Co.

W. R. Grace Co.-conn.

Chem Systems Inc.

Polysar International, S.a.

Pfizer Corporation

The United States of America As Represented by the Secretary of

Martin B Sherwin

Shu-Chieh P Wang

Robert Hansen

Jow-Lih Su

Abraham P Gelbein

I-Der Huang

Jimmy Y Peress

John R Adams

James F Walter

Richard C Cornelison

John J Blouin

Seymour B Alpert

Kenneth J Gwozdz

Arthur M Brownstein

Marshall E Frank

Mosum E Tsui

Neal Paul Cochran

Shu-Shieh P Wang

Andrew Westner

Stewart R Montgomery

Puvin Pichaichanarong

Catalytic hydrogenation of nitroalkane to N-alkylhydroxylamine free base in the absence of transition metal ions, and omission of acid and the resultant free base is storage stable, permitting shipment and storage of 15% aqueous solution for use as oxygen scavenger in boiler feed water treatment.

Hydrogenation of nitroalkanes to hydroxylamines

There is provided an improved core for an electrically heatable catalytic converter, and an electrically heatable catalytic converter containing such core, said core characterized by having a plurality of subcircuits in which the heater strips of thin high temperature resistive metal alloy are in parallel and connected between an outer shell segment and a central structural member, and the plurality of such subcircuits is connected in series, whereby the resistance between the terminals of the electrically heatable catalytic converter is effectively raised.

Core for an electrically heatable catalytic converter

A process for forming thioglycolic acid by contacting in a reaction zone at elevated pressure of at least 250 psig a mixture of monochloroacetic acid and dichloroacetic acid with a molar excess of an alkali metal hydrosulfide to form the alkali metal salt of thioglycolic acid, acidifying said salt and removing the free thioglycolic acid. A preferred process further requires separating any formed thiodiglycolic acid from the resultant liquid phase materials and recycling said acid to the reaction zone.

Synthesis of thioglycolic acid

This invention relates to the production of aminoacetonitriles, and more specifically to an integrated process wherein a crude, unpurified reactor product stream from a hydrogen cyanide reactor together with a formaldehyde stream, optionally, a crude, unpurified reactor product stream from a formaldehyde process reactor are fed directly to a reactive absorber with an additional nitrogen source and scrubbed with a controlled pH aqueous solution to produce aminoacetonitriles in high yields. This process eliminates intermediate recovery and purification processes associated with conventional hydrogen cyanide and formaldehyde production processes by integrating the recovery and reaction processes into a reactive absorber.

Integrated process for the production of aminoacetonitriles

This invention relates to the production of iminodiacetonitrile, and more specifically to an integrated process wherein a crude, unpurified reactor gas stream from a hydrogen cyanide reactor and optionally, a crude, unpurified reactor gas stream from a formaldehyde process reactor are fed directly to a reactive absorber together with additional ammonia and acidified water to produce iminodiacetonitrile in high yields. This process provides improved economics for producing iminodiacetonitrile by eliminating costly intermediate recovery and purification processes associated with conventional hydrogen cyanide and formaldehyde production processes.

Process for the production of iminodiacetonitrile

A process for the production of hydrogen cyanide which comprises combining methanol ammoxidation with formamide decomposition in the same reactor, using a metal oxide catalyst. This process generally involves forming a gaseous reaction mixture comprising methanol, formamide, ammonia, oxygen and optionally formaldehyde. This reaction mixture is then passed over the metal oxide catalyst at a temperature in the range 200.degree. to 600.degree. and a pressure in the range 5 to 20 psig.

Process for the production of hydrogen cyanide

A process is disclosed for catalyzing the transamination of an amino acid precursor to the corresponding L-amino acid by using aspartic acid as the amino donor and by adding certain multivalent metal ions, in the form of solid metal particles or pieces, to the system to catalyze the decomposition of oxalacetic acid, a by-product of the transamination.

Transamination process for producing amino acids

An improved process for selectively forming aliphatic polyamines from aliphatic polynitriles having 2 to 3 atoms between cyano groups by reacting aliphatic polynitrile, with hydrogen in the presence of a primary or secondary amine, through a fixed bed reactor while continuously contacting the reactants with granular Raney cobalt packed therein.

Synthesis of aliphatic polyamines

A process for preparing L-aspartic acid by contacting fumarate ion-containing solution with aspartase or aspartase-producing microorganisms, adding maleic acid to insolubilize or precipitate the L-aspartic acid, isomerizing maleic acid in the supernatant liquid to form fumaric acid and recycling the fumaric acid into contact with the enzyme or microorganisms.

Process for preparing L-aspartic acid

A process for selectively forming nitro compounds by contacting, at elevated temperature and pressure and in a homogeneous gas phase, an aldehyde having from two to ten carbon atoms with nitrogen dioxide alone or in the presence of oxygen and/or water.

Preparation of nitro compounds by vapor phase nitration of aldehydes

A process for selectively forming nitroalkanes and nitroaromatics by contacting, at elevated temperature and pressure and in a homogeneous gas phase, an organic carboxylic acid having from two to ten carbon atoms with NO.sub.2 alone or in the presence of oxygen and/or water.

Preparation of nitro compounds by vapor phase nitration of carboxylic

A process for selectively forming nitro compounds by contacting, at elevated temperature and pressure and in a homogeneous gas phase, a ketone having from three to ten carbon atoms with nitrogen dioxide alone or in the presence of oxygen and/or water.

Preparation of nitro compounds by vapor phase nitration of ketones

A process for selectively forming nitro compounds by contacting, at elevated temperature and pressure and in a homogeneous gas phase, an alcohol having from two to ten carbon atoms with nitrogen dioxide alone or in the presence of oxygen and/or water.

Preparation of nitro compounds by vapor phase nitration of organic

An improved process for forming nitroparaffins by gaseous phase nitration of hydrocarbons higher than methane. The improvement comprises carrying out the nitration in the presence of a small amount of at least one carboxylic acid, preferably acetic acid.

Process for forming nitroparaffin

A process for selectively forming nitro compounds by contacting, at elevated temperature and pressure and in a homogeneous gas phase, an organic carboxylic acid having from two to ten carbon atoms with NO.sub.2 or HNO.sub.3 alone or in the presence of oxygen and/or water.

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Potomac, MD, United States of America

Martin B Sherwin