Patents by Inventor Erwin Schrott

Erwin Schrott 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 manufacture of a catalyst
    Patent number: 4008177
    Abstract: A catalyst of high activity and stereospecificity in .alpha.-olefin polymerization is obtained when titanium trichloride, prepared by reduction with aluminum alkyl halides, is treated first with an ether and then, without separation of the ether, with an aluminum alkyl halide in the presence of a small amount of a cyclopolyene and/or an olefin.
    Type: Grant
    Filed: February 27, 1975
    Date of Patent: February 15, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Kurt Rust, Erwin Schrott, Helmut Strametz, Hans-Jurgen Kablitz
  • Process for the manufacture of a catalyst
    Patent number: 4008176
    Abstract: A catalyst of high activity and stereospecificity in .alpha.-olefin polymerization is obtained when titanium trichloride, prepared from titanium tetrachloride by reduction with an aluminum alkyl halide, is thermally treated, first with an ether in the presence of a cyclopolyene and the solid reaction product is then treated with an aluminum alkyl halide in the presence of a small amount of a cyclopolyene and/or an olefin. With the catalyst obtained high space-time yields of .alpha.-olefin polymers and copolymers can be produced.
    Type: Grant
    Filed: February 27, 1975
    Date of Patent: February 15, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Kurt Rust, Erwin Schrott, Helmut Strametz, Hans-Jurgen Kablitz
  • Process for the manufacture of a catalyst
    Patent number: 4007132
    Abstract: A catalyst of high activity and stereospecificity in .alpha.-olefin polymerization is obtained by subjecting titanium trichloride, prepared from titanium tetrachloride by reduction with aluminum alkyl halides, to two thermal treatments, the second one being carried out in the presence of an dialkyl ether and a cyclopolyene, and/or after-treating the solid reaction product with an aluminum alkyl halide, optionally in the presence of a small amount of a cyclopolyene and/or an olefin.
    Type: Grant
    Filed: February 27, 1975
    Date of Patent: February 8, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Kurt Rust, Erwin Schrott, Helmut Strametz, Hans-Jurgen Kablitz
  • Process for the manufacture of a catalyst
    Patent number: 4007133
    Abstract: A catalyst of high activity and stereospecificity in .alpha.-olefin polymerization is obtained by subjecting titanium trichloride, obtained by reduction of titanium tetrachloride with aluminum alkyl halides, to two thermal treatments, the second thermal treatment being carried out in the presence of a dialkyl ether.
    Type: Grant
    Filed: February 27, 1975
    Date of Patent: February 8, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Kurt Rust, Erwin Schrott, Helmut Strametz