Patents by Inventor Wilfried Becher

Wilfried Becher 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 the preparation of a soldering flux
    Patent number: 5968288
    Abstract: A method for the preparation of potassium salts of complex aluminum fluorides which can be used in particular as a flux in particular for soldering lightweight metallic materials. In the method a potassium compound is added to aqueous fluoroaluminic acid, and potassium cryolite or a substance mixture which contains potassium cryolite is added to the resulting suspension. The resulting product is then dried and can be used as a flux for soldering lightweight metallic materials, especially aluminum.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: October 19, 1999
    Assignee: Solvay Fluor und Derivate GmbH
    Inventors: Heinrich Willenberg, Wilfried Becher, deceased, Karl-Heinz Hellberg
  • Process for preparing sulphur hexafluoride
    Patent number: 4108967
    Abstract: Disclosed is a process for the production of sulphur hexafluoride comprising the steps of reacting fluorine and molten sulphur, removing lower-boiling by-products, separating a portion of the sulphur hexafluoride from higher-boiling by-products and treating the residue containing the higher-boiling by-products at a temperature between about 450.degree. and 800.degree. C. for a period of time between about 0.1 and 25 seconds. The treatment step may be carried out in the presence of elementary fluorine, and provision may be made for recycling the treated or untreated residue to the reaction stage. An apparatus for carrying out the process is also disclosed.
    Type: Grant
    Filed: June 15, 1977
    Date of Patent: August 22, 1978
    Assignee: Kali-Chemie Aktiengesellschaft
    Inventors: Joachim Massonne, Wilfried Becher
  • Process for preparing calcium fluoride from hexafluoro silicic acid and production of silicic acid gel or active silicic acid from said calcium fluoride
    Patent number: 4078043
    Abstract: Disclosed is a process for the preparation of calcium fluoride comprising reacting hexafluoro silicic acid with calcium carbonate in the presence of sulfate or aluminum ions within a pH range of between about 2 and 6 and separating the calcium fluoride precipitate from the resulting aqueous silica sol.
    Type: Grant
    Filed: December 15, 1976
    Date of Patent: March 7, 1978
    Assignee: Kali-Chemie Aktiengesellschaft
    Inventors: Wilfried Becher, Joachim Massonne
  • Process for preparing sulphur hexafluoride
    Patent number: 4039646
    Abstract: Disclosed is a process for the production of sulphur hexafluoride comprising the steps of reacting fluorine and molten sulphur, removing lower-boiling by-products, separating a portion of the sulphur hexafluoride from higher-boiling by-products and treating the residue containing the higher-boiling by-products at a temperature between about 450.degree. and 800.degree. C. for a period of time between about 0.1 and 25 seconds. The treatment step may be carried out in the presence of elementary fluorine, and provision may be made for recycling the treated or untreated residue to the reaction stage. An apparatus for carrying out the process is also disclosed.
    Type: Grant
    Filed: February 14, 1975
    Date of Patent: August 2, 1977
    Assignee: Kali-Chemie Aktiengesellschaft
    Inventors: Joachim Massonne, Wilfried Becher
  • Process for preparing calcium fluoride from hexafluoro silicic acid
    Patent number: 4031193
    Abstract: Disclosed is a process for the preparation of calcium fluoride comprising reacting hexafluoro silicic acid with calcium carbonate in the presence of sulfate or aluminum ions within a pH range of between about 2 and 6 and separating the calcium fluoride precipitate from the resulting aqueous silica sol.
    Type: Grant
    Filed: February 14, 1975
    Date of Patent: June 21, 1977
    Assignee: Kali-Chemie Aktiengesellschaft
    Inventors: Wilfried Becher, Joachim Massonne