Patents by Inventor Ali HARTWIG

Ali HARTWIG 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).

  • Process for the preparation of an alkanesulfonic acid
    Patent number: 10703715
    Abstract: The present invention relates to a process for the preparation of an alkanesulfonic acid by oxidation of a sulfur containing starting compound with an oxygen containing fluid, wherein the sulfur containing starting compound is provided in a reaction system, comprising a reaction vessel (1) with an expansion vessel (2) on its top, wherein the reaction vessel and the expansion vessel are connected to allow a flow of a fluid stream from the reaction vessel into the expansion vessel.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: July 7, 2020
    Assignee: Evonik Operations GmbH
    Inventors: Benjamin Fonfe, Chiu Kee Cheung, Ali Hartwig
  • Process for operating a plant for preparing an alkanesulfonic acid
    Patent number: 10494331
    Abstract: The present invention relates to a process for operating a plant for preparing an alkanesulfonic acid, wherein said alkanesulfonic acid is prepared by oxidation of an alkylmercaptan, dialkydisulfide and/or dialkylpolysulfide and the one or more alkyl radicals of the alkylmercaptan, dialkydisulfide and/or dialkylpolysulfide are identical with the alkyl radical of the alkylsulfonic acid to be prepared, characterized in that the oxidation is performed in the presence of an at least stoichiometric amount of an oxoacid of nitrogen, e.g.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: December 3, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Benjamin Fonfe, Chiu Kee Cheung, Ali Hartwig, Nadine Duerr
  • PROCESS FOR OPERATING A PLANT FOR PREPARING AN ALKANESULFONIC ACID
    Publication number: 20190077748
    Abstract: The present invention relates to a process for operating a plant for preparing an alkanesulfonic acid, wherein said alkanesulfonic acid is prepared by oxidation of an alkylmercaptan, dialkydisulfide and/or dialkylpolysulfide and the one or more alkyl radicals of the alkylmercaptan, dialkydisulfide and/or dialkylpolysulfide are identical with the alkyl radical of the alkylsulfonic acid to be prepared, characterized in that the oxidation is performed in the presence of an at least stoichiometric amount of an oxoacid of nitrogen, e.g.
    Type: Application
    Filed: September 12, 2018
    Publication date: March 14, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Benjamin Fonfe, Chiu Kee Cheung, Ali Hartwig, Nadine Duerr
  • PROCESS FOR THE PREPARATION OF AN ALKANESULFONIC ACID
    Publication number: 20190071394
    Abstract: The present invention relates to a process for the preparation of an alkanesulfonic acid by oxidation of a sulfur containing starting compound with an oxygen containing fluid, wherein the sulfur containing starting compound is provided in a reaction system, comprising a reaction vessel (1) with an expansion vessel (2) on its top, wherein the reaction vessel and the expansion vessel are connected to allow a flow of a fluid stream from the reaction vessel into the expansion vessel.
    Type: Application
    Filed: September 5, 2018
    Publication date: March 7, 2019
    Applicant: Evonik Degussa GmbH
    Inventors: Benjamin FONFE, Chiu Kee CHEUNG, Ali HARTWIG