Pennwalt Corporation

Elf Atochem North America, Inc.

Atochem North America, Inc.

Other

Elf Atochem N.a., Inc.

Stanley R Sandler

Jeffrey D Miano

John F Kennoy

Mabel M Chen

Joseph M Bohen

James S Perilli

Steven Gabriel Schon

Ivan Christoff Popoff

Michael D Gernon

David M Gardner

Harold G Monsimer

William J Tuszynski

Paul J McElligott, Jr

Altaf Husain

Pamela J Peerce-Landers

Shyam B Advani

Donald A Sheldon

John C Wetzel

Doris L Baer

Jacques Ragot

Christian Forquy

A process is disclosed for the preparation of primary mercaptans by reacting hydrogen sulfide with an alpha-olefin in the presence of a reaction initiating amount of a borane represented by the formula R.sub.2 BH or R.sub.3 B where R is a linear or cyclic aliphatic or aryl group.

Preparation of primary mercaptans

A process is disclosed for the conversion of an ammonium or amine salt of an alkanesulfonic acid to its corresponding alkanesulfonamide by heating the salt to at least its melting point to remove the water by-product and recover an alkanesulfonamide.

Alkanesulfonamides from ammonium alkanesulfonates

Novel zirconium compounds of sulfonic acids are disclosed which have the following general formula:

Zirconium compounds of sulfonic acids

Linear C.sub.4 + alkyl mercaptans of high purity are prepared by the reaction of a di-linear(C.sub.4 +) alkyl sulfide with hydrogen sulfide at elevated temperature in the presence of a specified transition alumina material.

Process for the manufacture of high purity linear C.sub.4  + alkyl

N-benzyl-N-organo-substituted aminoalkanol is prepared by reacting benzyl chloride or substituted benzyl chloride with an organo-substituted aminoalkanol in the presence of a molar excess of the starting aminoalkanol and, optionally, water, and in the absence of a) an organic solvent for the reactants and b) alkali metal hydroxide. A portion of the excess aminoalkanol may be substituted with an alternative amine or dissolved alkali metal carbonate.

Process for the preparation of N-benzyl-N-organoaminoalkanol

Propanone-1,3-disulfonic acid (acetone disulfonic acid) may be prepared by reacting chlorosulfonic acid with acetone preferably in the presence of a solvent for the reactants, such as methylene chloride, although a neat reaction is possible. The reactants and reaction conditions prior to separation should be substantially anhydrous, but water may be added after reaction to separate the product as an aqueous solution.

Preparation of propanone-1,3-disulfonic acid

A process is disclosed for the preparation of pure ammonium thioglycolate from thioglycolic acid contaminated with the isopropyl ester of thioglycolic acid wherein the contaminated acid is reacted with aqueous ammonia or ammonium hydroxide at a pH of at least 6.5 to about 9.0 at elevated temperature.

Preparation of pure ammonium thioglycolate

The alkyl groups of dialkyl trisulfides are exchanged with the alkyl groups of mercaptans by reacting a tertiary dialkyl trisulfide with an alkyl mercaptan having a greater number of carbon atoms in its alkyl group than said trisulfide in the presence of an acidic or basic type catalyst for a time and a temperature sufficient to produce a dialkyl trisulfide having at least one transferred alkyl group from said mercaptan.

Process for the transfer of alkyl groups in dialkyl trisulfides and

A process is disclosed for the preparation of unsymmetrical dialkyl trisulfides by the reaction of dialkyl trisulfides and olefins in the presence of an acidic-type catalyst whereby alkyl groups are exchanged. Novel mixtures of symmetrical and unsymmetrical dialkyl trisulfides are also disclosed.

Process for the preparation of unsymmetrical alkyl trisulfides and

A method for the preparation of alkanesulfonamides in high purity and high yield using solvents selected from C.sub.3 to C.sub.8 cyclic ethers or mixtures thereof is disclosed. The final products have use as synthetic intermediates for the manufacture of useful final products.

Preparation of alkanesulfonamides

Alkanedisulfonic acids, particularly methanedisulfonic acid (methionic acid), can be prepared by reacting the corresponding alkanesulfonic acid with chlorosulfonic acid. The reaction is carried out by heating the reactants with agitation, preferably under substantially anhydrous conditions in the presence of oxygen and at substantially atmospheric pressure. Particularly good yields are obtained using an activated carbon co-catalyst.

Preparation of alkanedisulfonic acids

A process for the preparation of alkane- and arenesulfonamides in high purity and yield is provided. Ammonia or alkylamine is reacted under boiling conditions with an alkane- or arenesulfonyl halide in the absence of an added solvent. The heat of reaction is dissipated by the heat of vaporization of the ammonia or alkylamine.

Process for the preparation of alkane- and arenesulfonamides

A process for dissolving wax, paraffin and/or sulfur deposits in an oil or gas pipeline or well comprises providing at the site of the deposit an acid and a compound which liberates carbon disulfide upon contact with the acid, whereby the deposit is dissolved by the liberated carbon disulfide.

Method for dewaxing oil and gas pipelines or wells

2,4-pentanedionemonosulfonic acid is prepared by reacting chlorosulfonic acid with 2,4-pentanedione, preferably in the presence of an anhydrous solvent. The method of this invention generally yields 2,4-pentanedionemonosulfonic acid in excess of about 75 percent. The noval pentanedionesulfonic acid 2,4-pentanedionemonosulfonic acid(acetylacetone sulfonic acid) is disclosed.

2,4-pentanedione-1-sulfonic acid and method for preparing the same

A process for preparing 3-(C.sub.1 -C.sub.12 alkylthio) C.sub.3 -C.sub.10 aldehydes by reacting a C.sub.1 -C.sub.12 alkyl mercaptan with an .alpha.,.beta.-unsaturated aliphatic aldehyde having from 3 to 10 carbon atoms in the presence of a weakly basic exchange resin having polyamine functionality and being in the free base form, is disclosed herein.

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Springfield, PA, United States of America

Stanley R Sandler