Patents by Inventor Wilhelm Huwels

Wilhelm Huwels 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 separating ethylbenzene and styrene by distillation
    Patent number: 5386075
    Abstract: A process for separating ethylbenzene and styrene by distillation is described. The process provides the advantages of a vapor compression/heat pump system, and is designed in such a manner that the energy applied is optimally utilized. The head pressure of the distillation column (1) is controlled in a simple manner, whereby a surprisingly stable column is achieved.
    Type: Grant
    Filed: October 7, 1993
    Date of Patent: January 31, 1995
    Assignee: Huels Aktiengesellschaft
    Inventors: Thomas Keil, Wilhelm Huwels, Georg Doll
  • Process for the purification of scrubbing solvents by removal of Ni(CO).sub .
    Patent number: 4142875
    Abstract: A process for the purification of pressurized gases, such as those emanating from the partial gasification resp. combustion of fuel, which gases contain Ni(CO).sub.4, which comprises contacting said Ni(O).sub.4 containing gas with a solvent at a temperature of from -60 to 0.degree. C., thereby forming a solution containing the gases and dissolved Ni(CO).sub.4, and thereafter heating said solution at a temperature of from 70 to 250.degree. C. for at least 0.25 hour at a pressure higher than the vapor pressure of said solvent, thereby precipitating and thereafter recovering nickel compound and releasing a purified solvent.
    Type: Grant
    Filed: March 10, 1977
    Date of Patent: March 6, 1979
    Assignee: Veba-Chemie Aktiengesellschaft
    Inventors: Gerd Bohmholdt, Gunter Deininger, Hans-Otto Gerlach, Winfried Hahn, Wilhelm Huwels
  • Process for recovering highly pure aromatics from a mixture of aromatics and non-aromatics
    Patent number: 4081355
    Abstract: Process for recovering highly pure aromatic substances from mixtures of hydrocarbons which contain in addition to the aromatic substances, large amounts of non-aromatic substances by liquid-liquid extraction in combination with an after arranged extractive distillation whereby the liquid-liquid extraction of the starting hydrocarbon mixture is carried out under such conditions that the resulting extract contains substantially the total amount of the aromatic substances and a portion of the non-aromatic substances, introducing this extract into an after arranged extractive distillation for further separating said extract whereby the sump product (extract phase) formed is drawn off and introduced into an after arranged distillation column where it is separated into an aromatic and a solvent fraction, while the head product of the extractive distillation (raffinate phase) is reintroduced into the bottom of the extractor for liquid-liquid extraction thereof, wherein there is used in both of the extracting stages,
    Type: Grant
    Filed: October 27, 1976
    Date of Patent: March 28, 1978
    Assignee: Krupp-Koppers GmbH
    Inventors: Gerhard Preusser, Martin Schulze, Klaus Richter, Wilhelm Huwels