Patents by Inventor Willi Ploesser

Willi Ploesser 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).

  • METHOD FOR SEPARATING AMMONIA OUT OF AN ALCOHOLIC SOLUTION IN THE PRESENCE OF CARBONIC ACID COMPOUNDS
    Publication number: 20170101322
    Abstract: The present invention describes a method of removing ammonia from alcoholic solution in the presence of carbonic acid compounds while avoiding fouling by supplying the solution to be separated to the upper part of a distillation column and adjusting the temperature at the introduction point such that the ammonium salts of the carbonic acid compound in question are soluble in the in question at the top of the distillation column under the operating conditions.
    Type: Application
    Filed: March 13, 2015
    Publication date: April 13, 2017
    Applicant: Evonik Roehm GmbH
    Inventors: Alexander MAY, Willi PLOESSER, Markus Rolf ROSSMEISSL, Steffen KRILL, Martin KOESTNER
  • Method for dehydrating alpha-substituted carboxylic acids
    Patent number: 9428437
    Abstract: The present invention describes a process for preparing alpha-beta-unsaturated carboxylic acids by dehydration of hydroxycarboxylic or alkoxycarboxylic acids which are substituted in the alpha position, in particular 2-hydroxyisobutyric acid, while avoiding accumulation of by-products and additives.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: August 30, 2016
    Assignee: EVONIK ROEHM GmbH
    Inventors: Alexander May, Steffen Krill, Joerg Becker, Willi Ploesser, Marcel Treskow, Martin Koestner
  • METHOD FOR DEHYDRATING ALPHA-SUBSTITUTED CARBOXYLIC ACIDS
    Publication number: 20160090344
    Abstract: The present invention describes a process for preparing alpha-beta-unsaturated carboxylic acids by dehydration of hydroxycarboxylic or alkoxycarboxylic acids which are substituted in the alpha position, in particular 2-hydroxyisobutyric acid, while avoiding accumulation of by-products and additives.
    Type: Application
    Filed: April 28, 2014
    Publication date: March 31, 2016
    Applicant: EVONIK ROEHM GmbH
    Inventors: Alexander MAY, Steffen KRILL, Joerg BECKER, Willi PLOESSER, Marcel TRESKOW, Martin KOESTNER
  • METHOD FOR PRODUCING ALPHA-HYDROXYCARBOXYLIC ACID ESTERS
    Publication number: 20140135521
    Abstract: The present invention relates to a continuous process for preparing alpha-hydroxycarboxylic esters by reacting at least one alpha-hydroxycarboxamide present in the liquid phase with an alcohol in the presence of a catalyst, which is characterized in that the resulting alpha-hydroxycarboxylic ester is at least partly separated from the reaction mixture via the gas phase.
    Type: Application
    Filed: July 3, 2012
    Publication date: May 15, 2014
    Applicant: Evonik Roehm GmbH
    Inventors: Martin Koestner, Willi Ploesser, Alexander May
  • Continuous method for making isobutyric acid
    Patent number: 5169985
    Abstract: Methods of improving the yield in the continuous preparation of isobutyric acid from propene, carbon monoxide, and water under pressure in liquid hydrogen fluoride as a Koch catalyst by mixing the propene with excess carbon monoxide, preferably carbon monoxide reintroduced from the process and freed of HF, and introducing the mixture into the reactor.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: December 8, 1992
    Assignee: Rohm GmbH
    Inventors: Wolfgang Ruppert, Willi Ploesser
  • Method for handling reaction mixtures containing hydrogen fluoride
    Patent number: 4791227
    Abstract: What is disclosed is the use of metallic vessels having particularly high corrosion resistance which are made of(a) aluminum or alloys containing more than 95% aluminum, or of(b) nickel-chromium-iron alloys containing from 30 to 50% of nickel, from 20 to 30% of chromium, and from 18 to 50% of iron, by weight, in reacting or working up mixtures containing substantial amounts of hydrogen fluoride in addition to organic carboxylic acids and/or carbon monoxide and/or water.
    Type: Grant
    Filed: September 23, 1982
    Date of Patent: December 13, 1988
    Assignee: Rohm GmbH
    Inventors: Alfred Neumann, Willi Ploesser, Hermann-Josef Siegert