Patents by Inventor Stanley R. Sandler

Stanley R. Sandler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Preparation of primary mercaptans
    Patent number: 5741934
    Abstract: 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.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: April 21, 1998
    Inventors: Stanley R. Sandler, Pamela J. Peerce-Landers, Christian Forquy
  • Alkanesulfonamides from ammonium alkanesulfonates
    Patent number: 5618976
    Abstract: 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.
    Type: Grant
    Filed: March 6, 1996
    Date of Patent: April 8, 1997
    Assignee: Elf Atochem North America, Inc.
    Inventor: Stanley R. Sandler
  • Zirconium compounds of sulfonic acids
    Patent number: 5614650
    Abstract: Novel zirconium compounds of sulfonic acids are disclosed which have the following general formula:[R(SO.sub.3).sub.x ].sub.y [R'(SO.sub.3).sub.x' ].sub.y' Zr[(O.sub.3 S).sub.x" R"].sub.y" [(O.sub.3 S).sub.x"' R'"].sub.y'"where R, R', R", R'" are independently substituted or unsubstituted, alkyl, alkylene, aryl or alkaryl radicals and x, x', x", x"', y, y', y" and y"' are sufficient in value to supply 4 sulfonate groups to the molecule, and the use of such zirconium compounds as catalysts in organic chemical reactions.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: March 25, 1997
    Inventors: Stanley R. Sandler, Michael D. Gernon, Jacques Ragot
  • Process for the manufacture of high purity linear C.sub.4 + alkyl mercaptans
    Patent number: 5453543
    Abstract: 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.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: September 26, 1995
    Assignee: Elf Atochem North America, Inc.
    Inventors: Michael D. Gernon, Stanley R. Sandler
  • Process for the preparation of N-benzyl-N-organoaminoalkanol
    Patent number: 5436373
    Abstract: 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.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: July 25, 1995
    Assignee: Elf Atochem North America, Inc.
    Inventors: Stanley R. Sandler, Doris L. Baer
  • Preparation of propanone-1,3-disulfonic acid
    Patent number: 5430180
    Abstract: 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.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: July 4, 1995
    Assignee: Elf Atochem N.A., Inc.
    Inventor: Stanley R. Sandler
  • Preparation of pure ammonium thioglycolate
    Patent number: 5319136
    Abstract: 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.
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: June 7, 1994
    Assignee: Elf Atochem North America, Inc.
    Inventor: Stanley R. Sandler
  • Process for the transfer of alkyl groups in dialkyl trisulfides and mercaptans
    Patent number: 5294743
    Abstract: 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.
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: March 15, 1994
    Assignee: Elf Atochem North America, Inc.
    Inventor: Stanley R. Sandler
  • Process for the preparation of unsymmetrical alkyl trisulfides and products
    Patent number: 5264631
    Abstract: 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.
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: November 23, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventor: Stanley R. Sandler
  • Preparation of alkanesulfonamides
    Patent number: 5166431
    Abstract: 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.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: November 24, 1992
    Assignee: Elf Atochem North America, Inc.
    Inventors: Stanley R. Sandler, James S. Perilli, John F. Kennoy
  • Preparation of alkanedisulfonic acids
    Patent number: 5117051
    Abstract: 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.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: May 26, 1992
    Assignee: Atochem North America, Inc.
    Inventor: Stanley R. Sandler
  • Process for the preparation of alkane- and arenesulfonamides
    Patent number: 5068427
    Abstract: 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.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: November 26, 1991
    Assignee: Atochem North America, Inc.
    Inventors: Stanley R. Sandler, Steven G. Schon, David M. Gardner
  • Method for dewaxing oil and gas pipelines or wells
    Patent number: 5053149
    Abstract: 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.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: October 1, 1991
    Assignee: Atochem North America, Inc.
    Inventors: Paul J. McElligott, Jr., Stanley R. Sandler, John F. Kennoy, William J. Tuszynski
  • 2,4-pentanedione-1-sulfonic acid and method for preparing the same
    Patent number: 5025104
    Abstract: 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.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: June 18, 1991
    Assignee: Atochem North America, Inc.
    Inventor: Stanley R. Sandler
  • Preparation of 3-(alkylthio) aldehydes
    Patent number: 5015776
    Abstract: 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.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: May 14, 1991
    Assignee: Atochem North America, Inc.
    Inventor: Stanley R. Sandler
  • 2,4-pentanedione-1,5-disulfonic acid and method for preparing the same
    Patent number: 4987249
    Abstract: 2,4-pentanedione-1,5-disulfonic acid is prepared by reacting chlorosulfonic acid with 2,4-pentanedione with heating to a temperature greater than about 50.degree. C., preferably in the presence of an anhydrous solvent. The method of this invention generally yields 2,4-pentanedione-1,5-disulfonic acid in excess of about 60 percent. The novel pentanedionedisulfonic acid (2,4-pentanedione-1,5-disulfonic acid acetylacetone disulfonic acid) is disclosed.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: January 22, 1991
    Assignee: Atochem North America, Inc.
    Inventor: Stanley R. Sandler
  • Preparation of alkanesulfonamides
    Patent number: 4970339
    Abstract: A method for the preparation of alkanesulfonamides in high purity and high yield using solvents selected from C.sub.4 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.
    Type: Grant
    Filed: November 30, 1988
    Date of Patent: November 13, 1990
    Assignee: Atochem North America, Inc.
    Inventors: Stanley R. Sandler, James S. Perilli, John F. Kennoy
  • Photochemical preparation of 3-(organothio) aldehydes
    Patent number: 4944853
    Abstract: A process is disclosed for the preparation of 3-(organothio)aldehydes by reacting a mercaptan with an .alpha., .beta.-unsaturated aliphatic aldehyde under actinic radiation in the absence of an oxygen-containing gas wherein the mercaptan and aldehyde are mixed in substantially equimolar amount and the reaction temperature ranges from about 2.degree. to less than 60.degree. C.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: July 31, 1990
    Assignee: Pennwalt Corporation
    Inventor: Stanley R. Sandler
  • Tertiary butylhydrazides as plant growth regulators
    Patent number: 4906280
    Abstract: T-butylhydrazides of carboxylic acid anhydrides and carboxylic acid chlorides useful as plant growth regulants in the free acid form or their equivalent salts.
    Type: Grant
    Filed: October 14, 1987
    Date of Patent: March 6, 1990
    Assignee: Pennwalt Corporation
    Inventors: Stanley R. Sandler, Shyam B. Advani
  • Poly(fluoroacetylene) containing polymers
    Patent number: 4904739
    Abstract: Compositions of poly(fluoroacetylene) useful for providing electrically conductive properties to plastics by a method of dehydrofluorination of saturated fluoroethylene polymers.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: February 27, 1990
    Assignee: Pennwalt Corporation
    Inventor: Stanley R. Sandler