Carbocyclic Ring Containing Patents (Class 205/438)
  • Patent number: 10011782
    Abstract: A process and system for reducing the sulfur content from a mixture of hydrocarbons and oxidized sulfur-containing hydrocarbons is provided by electrochemical decomposition. The electrochemical reactions occur under electrical potential and in the presence of an electrolyte solution that is effective promote decomposition of a portion of the oxidized sulfur compounds, to recover a hydrocarbon product having a reduced sulfur content while minimizing loss of hydrocarbon.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: July 3, 2018
    Assignee: Saudi Arabian Oil Company
    Inventors: Omer Refa Koseoglu, Abdennour Bourane, Adnan Al-Hajji
  • Patent number: 8685222
    Abstract: The selective electrochemical reduction of halogenated 4-aminopicolinic acids is improved by activating the cathode at a final potential from about +1.0 to about +1.8 volts.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: April 1, 2014
    Assignee: Dow Agrosciences, LLC.
    Inventors: Chen Wang, Scott Lee Haynes, Carey L. Scortichini
  • Publication number: 20110108432
    Abstract: The invention relates to a process for the electrochemical direct amination of hydrocarbons by means of a diamond electrode and also a process for preparing aniline.
    Type: Application
    Filed: June 15, 2009
    Publication date: May 12, 2011
    Applicant: BASF SE
    Inventors: Itamar Malkowsky, Alexander Panchenko, Ulrich Griesbach, Andreas Fischer
  • Publication number: 20110105760
    Abstract: The present invention relates to a process for preparing substituted 2-aminobiphenyls and to a process for preparing (Het)arylamides of such 2-aminobiphenyls.
    Type: Application
    Filed: July 3, 2009
    Publication date: May 5, 2011
    Applicant: BASF SE
    Inventors: Michael Keil, Michael Rack, Thomas Zierke, Markus Heinrich, Alexander Wetzel
  • Patent number: 7052593
    Abstract: The present invention provides an electrochemical method for producing diaryl iodonium compounds wherein application of an electric current to an electrochemical cell containing a reaction mixture composed of a solvent, an iodoaryl compound and an electrolyte forms an oxidizing agent in situ. In this first step, the oxidizing agent is subsequently converted into a stable oxidized iodoaryl intermediate, typically an iodosyl compound. The electric potential is removed and in a second step a target aryl compound is introduced to the reaction mixture to react with the oxidized iodoaryl intermediate to form a diaryl iodonium compound.
    Type: Grant
    Filed: January 7, 2004
    Date of Patent: May 30, 2006
    Assignee: Cornell Development Corporation LLC
    Inventors: Leonard H. Wojcik, Jr., David D. Cornell
  • Patent number: 6916953
    Abstract: Process for preparing organic isocyanates, which comprises the steps (a) making available a first partial amount of chlorine, with the chlorine of this first partial amount having a content of free and bound bromine and iodine of <400 ppm; (b) making available a second partial amount of chlorine; (c) reacting the first and second partial amounts of chlorine with carbon monoxide to form phosgene; (d) reacting the phosgene from step (c) with one or more primary amines to form the corresponding isocyanates and hydrogen chloride; (e) separating off and, if necessary, purifying the isocyanates formed in step (d); (f) separating off and, if necessary, purifying the hydrogen chloride formed in step (d); (g) catalytically oxidizing at least part of the hydrogen chloride separated off in step (e) by means of oxygen to form chlorine; (h) separating off the chlorine formed in step (g) and using at least a partial amount of the chlorine which has been separated off as second partial amount of chlorine in step (b).
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: July 12, 2005
    Assignee: BASF Aktiengesellschaft
    Inventors: Christian Walsdorff, Martin Fiene, Eckhard Ströfer, Klaus Harth, Jan D. Jacobs, Filip Deberdt
  • Patent number: 6143161
    Abstract: The present invention refers to a process for the preparation of 4-(des-dimethylamino)-tetracyclines, which compounds have a therapeutical application. The starting tetracyclines are treated with a methylating agent and the resulting trimethylammonium salts are reduced by electrolysis in an aqueous solution at acidic pH, in the presence of an adequate electrolyte. A direct electrical current with a potential of 0.5-1.5 volts is applied between two convenient electrodes until the reaction is complete. The 4-(des-dimethylamino)-tetracyclines are isolated by extraction with an organic solvent.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: November 7, 2000
    Assignee: Hovione Inter Ltd.
    Inventors: William Heggie, Jose Galindro, Pedro Santos, Luis Carvalho
  • Patent number: 6010612
    Abstract: A process and a system produces isocyanate and converts anhydrous hydrogen chloride, which is a by-product of isocyanate production, to chlorine gas in an electrochemical cell. The chlorine is recycled to the isocyanate process. Any unreacted anhydrous hydrogen chloride may be recycled to the electrochemical cell. By recycling the anhydrous hydrogen chloride and the chlorine, the process and system are able to reduce the cost of producing isocyanate. In addition, this process and system process eliminate or at least substantially minimize the problems associated with disposal of anhydrous hydrogen chloride by turning it into a useful starting material in the isocyanate process.
    Type: Grant
    Filed: October 1, 1997
    Date of Patent: January 4, 2000
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Francisco Jose Freire, Bruce Arthur Kaiser, Vinci Martinez Felix, Dennie Turin Mah, James Arthur Trainham, Clarence Garlan Law, Jr., John Scott Newman
  • Patent number: 5700364
    Abstract: A process for synthesizing the compounds ##STR1## wherein X is halo, consists of, at a minimum, electrochemical oxidation of the allyl acetonide reactant with halide salt in an aqueous system, the desired compounds being useful as intermediates for the synthesis of inhibitors of renin or HIV protease or other proteases.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: December 23, 1997
    Assignee: Merck & Co., Inc.
    Inventor: Kai Rossen
  • Patent number: 5679235
    Abstract: An electrolyte contains a tetravalent salt of titanium and a trivalent salt of cerium in a methanesulfonic acid solution. A reducing agent consisting of trivalent titanium and an oxidizing agent consisting of tetravalent cerium are provided in the same solution. An electrochemical cell is disclosed wherein the catholyte and anolyte utilize this electrolyte. The reduction of tetravalent titanium into trivalent titanium is accomplished by electrolysis in the presence of extraneous trivalent cerium ions. The oxidation of trivalent cerium into tetravalent cerium is accomplished by electrolysis in the presence of extraneous tetravalent titanium ions. Simultaneous reduction of tetravalent titanium into trivalent titanium and oxidation of trivalent cerium to tetravalent cerium by electrolysis is also disclosed. Reduction of organic compounds using trivalent titanium in the presence of trivalent cerium in methanesulfonic acid is disclosed.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: October 21, 1997
    Assignee: Hydro-Quebec
    Inventor: Stephen Harrison
  • Patent number: 5643438
    Abstract: The invention relates to a new process for the preparation of substituted diaminodicarboxylic acid derivatives of the formula ##STR1## in a high yield by a modified Kolbe synthesis.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: July 1, 1997
    Assignee: Hafslund Nycomed Pharma Aktiengesellschaft
    Inventors: Johann Hiebl, Franz Rovenszky