Patents by Inventor Teizaburo Yawata

Teizaburo Yawata 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).

  • Catalysts for hydrodemetallization of hydrocarbons containing metallic compounds as impurities and process for hydro-treating such hydrocarbons using such catalysts
    Patent number: 4120780
    Abstract: A catalyst obtained by admixing red mud with alumina or/and an alumina-containing substance, optionally adjusting the water content of the admixture and/or adding an organic binder to the admixture, kneading and shaping the admixture into pellets having suitable size and shape, and calcining the pellets of 600.degree. C to 1,100.degree. C. The catalyst has a high compression strength and can, when used in the hydrodemetallization of hydrocarbons, achieve a high rate of demetallization and a low yield of low boiling fractions. The rate of demetallization is enhanced when the process is carried out using a hydrogen feed containing hydrogen sulfide.
    Type: Grant
    Filed: May 26, 1977
    Date of Patent: October 17, 1978
    Assignee: Chiyoda Chemical Engineering & Construction Co., Ltd.
    Inventors: Tatsuo Morimoto, Munekazu Nakamura, Masayoshi Inooka, Teizaburo Yawata
  • Catalysts for hydrodemetallization of hydrocarbons containing metallic compounds as impurities
    Patent number: 4075125
    Abstract: A catalyst obtained by admixing red mud with alumina or/and an alumina-containing substance, optionally adjusting the water content of the admixture and/or adding an organic binder to the admixture, kneading and shaping the admixture into pellets having suitable size and shape, and calcining the pellets at 600.degree. to 1,100.degree. C. The catalyst has a high compression strength and can, when used in the hydrodemetallization of hydrocarbons, achieve a high rate of demetallization and a low yield of low boiling fractions. The rate of demetallization is enhanced when the process is carried out using a hydrogen feed containing hydrogen sulfide.
    Type: Grant
    Filed: July 9, 1976
    Date of Patent: February 21, 1978
    Assignee: Chiyoda Chemical Engineering & Construction Co., Ltd.
    Inventors: Tatsuo Morimoto, Munekazu Nakamura, Masayoshi Inooka, Teizaburo Yawata