Patents Represented by Attorney A. H. Cole

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  • Catalyst and reverse disproportionation process
    Patent number: 4514519
    Abstract: A catalyst containing tungsten, an alkali or alkaline earth component, and iron on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: April 30, 1985
    Assignee: Monsanto Company
    Inventor: Charles F. Hobbs
  • Catalyst and reverse disproportionation process
    Patent number: 4511672
    Abstract: A catalyst containing tungsten, potassium, and bismuth on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: April 16, 1985
    Assignee: Monsanto Company
    Inventor: Charles F. Hobbs
  • Tetra-N-substituted urea derivatives as herbicides
    Patent number: 4505735
    Abstract: It is found that certain novel tetra-substituted urea derivatives have herbicidal properties. The derivatives bear, on the same nitrogen atom a cyanomethyl group and an esterified methylene phosphonic acid group.
    Type: Grant
    Filed: January 20, 1983
    Date of Patent: March 19, 1985
    Assignee: Monsanto Co.
    Inventor: Rajendra K. Singh
  • N-Phosphonomethylglycine derivatives and use as herbicides
    Patent number: 4505736
    Abstract: N-alkoxythione derivatives of N-phosphonomethylglycine are novel compounds with utility as herbicides and in plant growth regulating applications.
    Type: Grant
    Filed: May 11, 1983
    Date of Patent: March 19, 1985
    Assignee: Monsanto Company
    Inventor: John E. Franz
  • Production of high purity alkyl glyoxylate by plural stage distillation
    Patent number: 4502923
    Abstract: High purity alkyl glyoxylate is produced from complex mixtures containing alkyl glyoxylate, alkyl glycolate, water, alcohol and miscellaneous impurities. High purity alkyl glyoxylate is useful in the synthesis of alkyl glyoxylate polymers.
    Type: Grant
    Filed: October 6, 1983
    Date of Patent: March 5, 1985
    Assignee: Monsanto Company
    Inventors: David R. Dyroff, Yueting Chou, Dario R. Cova
  • Maleic anhydride production using high butane feed concentration
    Patent number: 4501907
    Abstract: An improvement in a process for the production of maleic anhydride by the catalytic vapor phase oxidation of a saturated aliphatic hydrocarbon having 4-10 carbon atoms in the presence of a catalyst comprising phosphorus, vanadium and oxygen, wherein long reactor tubes are used in a process employing a high feed concentration and low space velocity so as to minimize air compression.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: February 26, 1985
    Assignee: Monsanto Company
    Inventors: Gerald K. Kwentus, Michael Suda
  • Production of chloro-s-triazine triones
    Patent number: 4490528
    Abstract: A process for producing chloro-s-triazine trione with improved crystal properties comprising reacting cyanuric acid, alkali metal hydroxide, and chlorine in water, and crystallizing the resulting chloro-s-triazine trione in the presence of an alpha olefin sulfonate with from 4 to 20 carbon atoms.
    Type: Grant
    Filed: August 1, 1983
    Date of Patent: December 25, 1984
    Assignee: Monsanto Company
    Inventor: James C. Wygant
  • Substituted-butanediperoxoic acids and process for bleaching
    Patent number: 4487723
    Abstract: Substituted-butanediperoxoic acids represented by the formula ##STR1## wherein R is alkyl of 6 to 18 carbon atoms or phenyl are useful oxidizing agents. These substituted-butanediperoxoic acids are useful as bleaching agents and disinfecting agents.
    Type: Grant
    Filed: January 4, 1982
    Date of Patent: December 11, 1984
    Assignee: Monsanto Company
    Inventor: James M. Mayer
  • Composites of sulfur and crystalline phosphate fibers
    Patent number: 4484950
    Abstract: Composites possessing desirable properties are produced from compositions comprising molten elemental sulfur and crystalline phosphate fibers. These composites are useful for the fabrication of various structures, such as tanks, pipes, sheeting, pavement surfaces and the like.
    Type: Grant
    Filed: May 4, 1983
    Date of Patent: November 27, 1984
    Assignee: Monsanto Company
    Inventor: John A. Hinkebein
  • Two-stage crystallization of nitrilotriacetonitrile from a hot solution
    Patent number: 4485049
    Abstract: A process is disclosed for producing crystalline nitrilotriacetonitrile from a solution of nitrilotriacetonitrile and water in excess of 95.degree. C., comprising:a. cooling the nitrilotriacetonitrile-water solution in a first stage to the range of about 70.degree. C. to about 90.degree. C., preferably from about 80.degree. C. to about 90.degree. C., and more preferably about 85.degree. C., to produce a nitrilotriacetonitrile water slurry; andb. further cooling the nitrilotriacetonitrile-water slurry in a second stage to below about 35.degree. C., carried out either continuously or in a batch process. Cooling in the first stage is preferably accomplished by recycling cooled nitrilotriacetonitrile-water slurry from the second stage. Cooling in the second stage is preferably accomplished by vacuum cooling.
    Type: Grant
    Filed: January 3, 1983
    Date of Patent: November 27, 1984
    Assignee: Monsanto Company
    Inventors: Kent P. Lannert, Chung Y. Shen, Dat S. Trieu
  • Alkylphosphonate diesters and monoesters of N-phosphonomethylglycinate as herbicides
    Patent number: 4483705
    Abstract: Alkylphosphonate diesters and monoesters of N-phosphonomethylglycine are disclosed which are useful as herbicides. This invention further relates to herbicidal compositions containing such alkylphosphonate diesters and monoesters of N-phosphonomethylglycine and to herbicidal methods employing such compounds and compositions.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: November 20, 1984
    Assignee: Monsanto Co.
    Inventor: William R. Purdum
  • Substituted-butanediperoxoic acids and process for bleaching
    Patent number: 4482349
    Abstract: Substituted-butanediperoxoic acids represented by the formula: ##STR1##wherein R is alkyl of 6 to 18 carbon atoms or phenyl are useful oxidizing agents. These substituted-butanediperoxoic acids are useful as bleaching agents and disinfecting agents.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: November 13, 1984
    Assignee: Monsanto Company
    Inventor: James M. Mayer
  • Aminomethylenephosphonic acid solutions
    Patent number: 4477390
    Abstract: Aqueous solutions of aminomethylenephosphonic acid selected from diethylenetriaminepenta(methylenephosphonic acid). diethylenetriaminetetra(methylenephosphonic acid), diethylenetriaminetri(methylenephosphonic acid) and mixtures thereof are stabilized against crystallization of said aminomethylenephosphonic acid by including non-oxidizing mineral acid in such solutions in an amount stoichiometrically equivalent to at least 10% hydrochloric acid by weight of the solution.
    Type: Grant
    Filed: August 21, 1981
    Date of Patent: October 16, 1984
    Assignee: Monsanto Company
    Inventors: Michel A. O. Ledent, Bronislav H. May
  • Purification of N-acetyl aminophenols
    Patent number: 4474985
    Abstract: A process for increasing the color-free shelf life of a crude N-acetyl aminophenol prepared by the acetylation of an aminophenol wherein the N-acetyl aminophenol contains color-forming impurities which are the products of oxidation of the aminophenol and other side reactions. The process comprises dissolving the crude N-acetyl aminophenol in a solvent containing a reducing agent, heating the solution at about the boiling point, crystallizing the N-acetyl aminophenol from the solution, washing the crystalline N-acetyl aminophenol with solvent containing reducing agent and thereafter separating and drying the crystalline N-acetyl aminophenol.
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: October 2, 1984
    Assignee: Monsanto Company
    Inventors: Billy L. Keel, Irvin S. Klaus, Marvin L. Oftedahl
  • Purification of vanillin
    Patent number: 4474994
    Abstract: Crude vanillin is purified by supercritical extraction of impurities. The process is especially useful in purifying crude vanillin obtained from paper mill waste liquors. Preferred supercritical extraction fluid is CO.sub.2.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: October 2, 1984
    Assignee: Monsanto Company
    Inventor: Earle C. Makin
  • Novel silyl esters of N-phosphonomethylglycine
    Patent number: 4471131
    Abstract: This disclosure relates to novel silyl esters of N-phosphonomethylglycine useful as post-emergence herbicides.
    Type: Grant
    Filed: September 27, 1983
    Date of Patent: September 11, 1984
    Assignee: Monsanto Company
    Inventor: John E. Franz
  • Coordination complexes of optically active phosphine compounds
    Patent number: 4464306
    Abstract: The invention is a new family of phosphine compounds which can be used to make optically active metal coordination complex catalysts which combine high efficiency with a capability of performing rapidly (high efficiency and rapidly being established from Tables I, II and III as being greater than 75% efficiency and in times of not more than a few hours, preferably less than one hour) in water and thus avoiding solvent recovery and loss problems. The catalysts can be used in some alcoholic mediums as well as in some aqueous mediums. These catalysts are useful in catalytic asymmetric hydrogenation of some olefinic compounds. The new phosphine compounds are made from novel phosphine oxides.
    Type: Grant
    Filed: January 19, 1983
    Date of Patent: August 7, 1984
    Assignee: Monsanto Company
    Inventors: William C. Christopfel, William S. Knowles
  • N-Halo phosphonomethylamine derivatives as herbicides
    Patent number: 4461639
    Abstract: N-halo, N-cyanomethyl, diaryloxyphosphinylmethylamine compounds are described. These compounds have herbicidal activity and are useful active ingredients in herbicidal formulations.
    Type: Grant
    Filed: November 22, 1982
    Date of Patent: July 24, 1984
    Assignee: Monsanto Company
    Inventor: Rajendra K. Singh
  • Process for the manufacture of maleic anhydride
    Patent number: 4456764
    Abstract: Process for the manufacture of maleic anhydride which comprises contacting in the vapor phase a mixture of butane and molecular oxygen with a catalyst comprising in chemical combination phosphorus, vanadium, oxygen and a catalyst modifier comprising titanium combined with one or more elements selected from the group consisting of aluminum, cerium, cobalt and iron.
    Type: Grant
    Filed: September 20, 1982
    Date of Patent: June 26, 1984
    Assignee: Monsanto Company
    Inventor: James T. Wrobleski
  • Crystal purification
    Patent number: 4454361
    Abstract: Mixtures of para-nitrochlorobenzene crystals and a liquid, ordinarily comprising the mother liquor of the crystals are continuously separated in one or more cylindrical presses in at least two stages. Reduction of the interstitial space causes the mother liquor to be forced out of the drainage aperatures thus purifying the crystals.
    Type: Grant
    Filed: December 10, 1982
    Date of Patent: June 12, 1984
    Assignee: Monsanto Company
    Inventors: Suseelan R. Pookote, Melvin R. Bagley