Patents by Inventor Lawrence G. Vaughan

Lawrence G. Vaughan 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 production of tetrahydroanthraquinones
    Patent number: 4110353
    Abstract: High yields of tetrahydroanthraquinones are obtained by oxidizing a compound of the formula ##STR1## wherein R.sub.3 and R.sub.4 are the same or different and can be an alkyl group having one to eight carbon atoms or hydrogen. The reaction product thus produced is useful in the anthraquinone process for producing hydrogen peroxide.
    Type: Grant
    Filed: December 8, 1977
    Date of Patent: August 29, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lawrence G. Vaughan
  • Production of hydrogen peroxide
    Patent number: 4046868
    Abstract: An improved process for the production of hydrogen peroxide is provided in which an (N,N-dialkyl) carboxylic acid amide having a solubility in water of less than 1 percent at 25.degree. C. is used as a solvent in the anthraquinone process.
    Type: Grant
    Filed: September 26, 1973
    Date of Patent: September 6, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lawrence G. Vaughan
  • 1-Alkyl-substituted-1,2,3,4-tetrahydroanthraquinones
    Patent number: 3998937
    Abstract: 1-Alkyl and 1,3-dialkyl substituted-1,2,3,4-tetrahydroanthraquinones are provided which may also be alkyl substituted in the 6- and/or 7- position. These compounds are provided by condensing a naphthoquinone with an alkyl-substituted butadiene dimer, catalytically hydrogenating the adduct, then oxidizing the resulting hexahydro compound to the desired tetrahydroanthraquinone. Alternatively, the condensation product may be oxidized with a cupric compound or with air plus a weak base, and this compound catalytically hydrogenated and then oxidized to the corresponding tetrahydroanthraquinone. The compounds of this invention exhibit superior solubility in solvents commonly used in the cyclic process for manufacturing H.sub.2 O.sub.2 and thus enhance H.sub.2 O.sub.2 production.
    Type: Grant
    Filed: April 30, 1976
    Date of Patent: December 21, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lawrence G. Vaughan
  • 1-Alkyl-substituted-1,2,3,4-tetrahydroanthraquinones
    Patent number: 3962288
    Abstract: 1-Alkyl and 1,3-dialkyl substituted-1,2,3,4-tetrahydroanthraquinone are provided which may also be alkyl substituted in the 6- and/or 7- position. These compounds are provided by condensing a naphthoquinone with an alkyl-substituted butadiene dimer, catalytically hydrogenating the adduct, then oxidizing the resulting hexahydro compound to the desired tetrahydroanthraquinone. Alternatively, the condensation product may be oxidized with a cupric compound or with air plus a weak base, and this compound catalytically hydrogenated and then oxidized to the corresponding tetrahydroanthraquinone. The compounds of this invention exhibit superior solubility in solvents commonly used in the cyclic process for manufacturing H.sub.2 O.sub. 2 and thus enhance H.sub. 2 O.sub.2 production.
    Type: Grant
    Filed: March 14, 1974
    Date of Patent: June 8, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lawrence G. Vaughan