Hydrogen Containing Patents (Class 423/387)
  • Patent number: 4048291
    Abstract: A process for making hydroxyl ammonium salts by hydrogenation of nitric oxide in an acid medium in the presence of a platinum catalyst, wherein the catalyst contains 15 to 50 atom percent of selenium and the acid medium is at least 2N during the reaction. A new catalyst and method of making it are also disclosed.
    Type: Grant
    Filed: May 2, 1975
    Date of Patent: September 13, 1977
    Assignee: Inventa AG fur Forschung und Patentverwertung
    Inventors: Hussain El-Ghatta, Johann Karl Forrer
  • Patent number: 4017591
    Abstract: Complex aluminum-containing reaction products are produced by a process which comprises:Reactively contacting in an aqueous mediumA. activated aluminum comprising aluminum metal, at least 99.9% by weight pure, which has been permeated with a second metal or alloy selected from mercury, gallium and indium/gallium allows; andB. a source of NO.sub.x, e.g., NO and/or NO.sub.2 gas, or nitric acid.The product of the above reaction, useful as a fertilizer and/or a bleach or soap precursor contains aluinum, nitrogen in the form of NH, NH.sub.2, and/or NH.sub.3 groups, a minimum of nitrate groups, hydroperoxy groups, and possible minor amounts of nitrite and hydroxy groups. The product is formed as an aqueous solution and appears polymeric in nature.The aluminum containing reaction product can be further reacted with ammonia to increase the nitrogen content and increase the pH of the reaction product toward neutral and/or with hydrogen peroxide to produce a product which is further enriched with hydroperoxy groups.
    Type: Grant
    Filed: March 8, 1976
    Date of Patent: April 12, 1977
    Inventor: George G. Merkl
  • Patent number: 3996165
    Abstract: Novel platinum catalysts and a method for their preparation are disclosed. They are prepared by treating catalysts of platinum metal with salts of sulfurous acid or with sulfur compounds which liberate sulfurous acid in the presence of an acid. The treatment is conducted in the presence of hydroxylammonium salts in acid medium and in the absence of oxidizing agents capable of oxidizing sulfurous acid to form sulfate. The resulting catalysts are useful in preparing hydroxylamine.
    Type: Grant
    Filed: December 24, 1974
    Date of Patent: December 7, 1976
    Assignee: Inventa AG fur Forschung und Patentverwertung
    Inventors: Hussain El-Ghatta, Johann Karl Forrer
  • Patent number: 3994787
    Abstract: A process for producing and operating an electroplating bath in which there appears NH.sub.4.sup.+ ions which impair the quality of the bath comprising adding salts of a hexanitrocobaltate-III complex to the bath to bring about precipitation of the NH.sub.4.sup.+ ions.
    Type: Grant
    Filed: September 23, 1975
    Date of Patent: November 30, 1976
    Assignee: Teldec Telefunken-Decca Schallplatten GmbH
    Inventors: Emanuel Pfeil, Klaus Roschmann
  • Patent number: 3991115
    Abstract: This invention relates to a process for the production of cyclohexanone oxime by reacting cyclohexanone with excess aqueous hydroxylamine in the presence of excess ammonia. More specifically, the invention relates to improving yields of the oxime while reducing undesirable by-product formation by use of two or more stages of reaction with correlated adjustment of reaction conditions in each stage. The invention also involves improved recovery of the unreacted hydroxylamine reactant for recycle in the process.
    Type: Grant
    Filed: November 19, 1975
    Date of Patent: November 9, 1976
    Assignee: Allied Chemical Corporation
    Inventor: Richard Lynn Purgason
  • Patent number: 3976755
    Abstract: An improved process is disclosed wherein nitrate or nitrite ions, present in an alkaline solution, are reduced by means of a liquid alkali metal amalgam into hydroxylamine, using a reaction medium which, in addition to water, contains a water-miscible organic solvent for hydroxylamine and alkali nitrate or alkali nitrite.
    Type: Grant
    Filed: December 26, 1973
    Date of Patent: August 24, 1976
    Assignee: Stamicarbon B.V.
    Inventors: Marinus Alfenaar, Freddie J. Cremers
  • Patent number: 3966635
    Abstract: A process for reactivating platinum catalysts is disclosed. It comprises treating a platinum catalyst having reduced activity and selectivityA. in a first stage with an acid solution of a sulfur compound which liberates sulfurous acid in acid medium, and a hydroxylammonium salt, said treatment being conducted in the absence of oxidizing agents capable of oxidizing sulfurous acid to sulfate, andB. in a second stage with an acid solution of platinum (II) or platinum (IV) compounds in the presence of hydrogen.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: June 29, 1976
    Assignee: Inventa AG fur Forschung und Patentverwertung
    Inventors: Hussain El-Ghatta, Johann Karl Forrer
  • Patent number: 3956469
    Abstract: A process is disclosed whereby an improved platinum metal-containing catalyst is prepared. Standard platinum metal catalysts are treated with sulfur compounds which liberate sulfurous acid in acid media. The sulfur compounds contain 15 to 150 atom % of sulfur based on the platinum metal present. The treatment is conducted in the presence of hydroxylammonium salts in acid media and in the absence of reducing agents which are capable of reducing sulfurous acid to sulfide.
    Type: Grant
    Filed: October 7, 1974
    Date of Patent: May 11, 1976
    Assignee: Inventa AG fur Forschung und Patentverwertung
    Inventors: Hussain El-Ghatta, Johann Karl Forrer
  • Patent number: 3954946
    Abstract: Method and apparatus for reacting nitric oxide with H.sub.2 in the presence of noble metal catalysts in which waste gas is obtained by separating the gas contained in a liquid medium flowing countercurrently to the bubbles in a counter-current bubble column. Preferably, only a portion of the separated gas is removed as waste gas, the remainder being recycled. The apparatus comprises a counter-current bubble column having a gas recycling circuit to permit the recycling of excess NO contained in the separated gas.
    Type: Grant
    Filed: July 18, 1974
    Date of Patent: May 4, 1976
    Assignee: Inventa AG fur Forschung und Patentverwertung, Zurich
    Inventors: Werner Graf, Johann Karl Forrer
  • Patent number: 3950506
    Abstract: Olated chromium (III) nitrate is obtained by dissolving hexaaquochromium (III) nitrate in a C.sub.1 -C.sub.4 alcohol or in tetrahydrofuran, any of them containing less than about 10% of water. The preferred alcohol is isopropyl alcohol. The preparation can also start with chromium trioxide, which is reduced to chromium (III) nitrate by a reducing alcohol, such as isopropyl alcohol, in the presence of nitric acid. Alternatively, the reduction can be accomplished in a nonreducing organic solvent, such as tetrahydrofuran, by hydrogen peroxide in the presence of nitric acid. Highly olated chromium nitrate is an excellent coupling agent for reinforced thermoplastic composites. Olation in the presence of a carboxylic acid or addition of a carboxylic acid to the olated chromium (III) nitrate gives carboxylic acid-olated chromium (III) nitrate complexes, which are useful as coupling agents or as mold release agents.
    Type: Grant
    Filed: July 9, 1973
    Date of Patent: April 13, 1976
    Inventor: Charles C. Cumbo
  • Patent number: 3941840
    Abstract: A process for the production of hydroxylamine, by the catalytic reduction of nitrogen monoxide with hydrogen in a mineral acid medium, followed by the reaction of the resulting mixture to produce saturated ketoximes, especially cyclohexanone oxime, by the oximation of the respective ketones with the hydroxylamine contained in the mixture, after adjustment of the pH-value with ammonia.
    Type: Grant
    Filed: September 15, 1972
    Date of Patent: March 2, 1976
    Assignee: Centrala Industriala de Fibre Chimice
    Inventor: Cornel Constantin N. Rotaru
  • Patent number: 3940442
    Abstract: An improved recycle process for the production of cyclohexanone oxime comprising circulating an acidic, aqueous solution containing phosphoric acid or ammonium bisulphate or a mixture thereof between a hydroxylamine synthesis zone and a cyclohexanone oxime synthesis zone. Nitrate ions are added to the aqueous solution just prior to the hydroxylamine synthesis zone and catalytically reduced with molecular hydrogen. The aqueous solution from the hydroxylamine synthesis zone is then fed to the cyclohexanone oxime synthesis zone along with a ketone. The aqueous solution is then separated from the oxime formed, either (a) treated at an elevated temperature for a sufficient time to decompose any trace amounts of oxime and cyclohexanone or (b) subjected to a stripping step to remove any trace amounts of oxime and cyclohexanone before being recirculated to the hydroxylamine synthesis zone. The oxime formed by this process is a valuable commercial commodity.
    Type: Grant
    Filed: January 17, 1975
    Date of Patent: February 24, 1976
    Assignee: Stamicarbon B.V.
    Inventor: Abraham H. de Rooij
  • Patent number: 3936494
    Abstract: Naphthenohydroxamic acid is prepared by reaction at 25.degree.C to 30.degree.C, equimolar quantities ofA. an ester of naphthenic acid,B. hydroxylamine dissolved in an alcohol/water/alkali metal sulfate slurry wherein the water content of the slurry is insufficient to hydrolyze the ester during conversion to naphthenohydroxamic acid, andC. an alkali metal hydroxide dissolved in alcohol.Naphthenohydroxamic acid is useful as a chelating agent in hydrometallurgy to recover metal values from dilute solution.
    Type: Grant
    Filed: September 25, 1974
    Date of Patent: February 3, 1976
    Assignee: Diamond Shamrock Corporation
    Inventor: Stanley A. Lipowski