Patents by Inventor Ludwig Vogel

Ludwig Vogel 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).

  • Separating toluene diisocyanate and/or higher boiling solvents from distillation residues of the toluene diisocyanate manufacture using a fluidized bed
    Patent number: 4289589
    Abstract: A process for separating toluene diisocyanate and/or higher boiling solvents from distillation residues obtained from the phosgenation of toluene diamine in the presence of solvents wherein the separation takes place in a fluidized bed at temperatures of 140.degree. C. to 280.degree. C.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: September 15, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Waldemar Koehler, Bernd Blumenberg, Ludwig Vogel, Eckhard Hetzel
  • Manufacture of glycol acetate
    Patent number: 4189600
    Abstract: Diacetates of 1,2-glycols are manufactured by reacting acetic acid with an olefin and oxygen, using oxygen dissolved in the liquid phase of the reaction mixture and avoiding the presence of gaseous oxygen in the reaction space.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: February 19, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Martin Weitz, Juergen Hartig, Ludwig Vogel, Helmuth Grube
  • Manufacture of butenediol diacetate
    Patent number: 4122285
    Abstract: Butenediol diacetate is manufactured by reaction of butadiene, oxygen and acetic acid over a palladium or platinum catalyst, only liquid, and no gases, being present in the reaction chamber.
    Type: Grant
    Filed: August 13, 1976
    Date of Patent: October 24, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Martin Weitz, Ludwig Vogel, Juergen Hartig, Eckhard Hetzel
  • Manufacture of tetrahydrofuran from the diacetate of 1,4-butanediol
    Patent number: 4079068
    Abstract: Tetrahydrofuran is prepared from a compound containing butanediol or capable of generating butanediol. The butanediol-donating compound is an ester of butanediol which is reacted with hydrolysis and etherification by passing it downwardly through a distillation column together with an acid catalyst and passing steam upwardly therethrough. The product which distills off is tetrahydrofuran.
    Type: Grant
    Filed: August 21, 1975
    Date of Patent: March 14, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Eckhard Hetzel, Hans-Martin Weitz, Ludwig Vogel, Juergen Hartig
  • Continuous manufacture of phthalimide
    Patent number: 4001273
    Abstract: Continuous manufacture of phthalimide by reaction of phthalic anhydride with ammonia and washing the offgas with a melt containing phthalimide. The product is a starting material for the manufacture of dyes, pesticides and pigments, especially copper phthalocyanines.
    Type: Grant
    Filed: July 8, 1974
    Date of Patent: January 4, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Eckhard Hetzel, Ludwig Vogel, Gerhard Rotermund, Hans Christoph Horn