Patents by Inventor Silas W. Holmes

Silas W. Holmes 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).

  • Patent number: 4714691
    Abstract: A process using heterogeneous resin-bonded aluminum phenoxide catalyst to alkylate phenols, the catalyst per se, and a process for making the catalyst. The inventive alkylation process uses ortho-tert-butylphenoxide bonded to a phenolformaldehyde condensation resin heterogeneous catalyst to prepare 2,6-di-tert-butylphenol from isobutylene and ortho-tert-butylphenol.
    Type: Grant
    Filed: August 25, 1986
    Date of Patent: December 22, 1987
    Assignee: Ethyl Corporation
    Inventors: Dixie E. Goins, Silas W. Holmes, Edward A. Burt
  • Patent number: 4631349
    Abstract: A process using heterogeneous resin-bonded aluminum phenoxide catalyst to alkylate phenols, the catalyst per se, and a process for making the catalyst. The inventive alkylation process uses ortho-tert-butylphenoxide bonded to a phenolformaldehyde condensation resin heterogeneous catalyst to prepare 2,6-di-tert-butylphenol from isobutylene and ortho-tert-butylphenol.
    Type: Grant
    Filed: June 25, 1985
    Date of Patent: December 23, 1986
    Assignee: Ethyl Corporation
    Inventors: Dixie E. Goins, Silas W. Holmes, Edward A. Burt
  • Patent number: 4628127
    Abstract: A process for producing 2,4-di-substituted phenols wherein an olefin is reacted with phenol in the presence of a heterogeneous catalyst comprising an aluminum phenoxide bonded to an acidic solid polymeric resin to preferably form 2,4-di-substituted phenol. A process for preparing a heterogeneous catalyst and a heterogeneous catalyst having the structure(Resin --A--).sub.m Al(--OC.sub.6 R.sub.5).sub.n (11)wherein Resin is a solid polymeric resin having acidic functional groups A, m is 1 or 2, n is 2 or 3 and the R are independently selected from H, alkyl, cycloalkyl, and aralkyl. Preferably, a styrene-divinylbenzene polymeric resin of a macroreticular structure is used for the alkylation process and A is --SO.sub.3 --.
    Type: Grant
    Filed: June 25, 1985
    Date of Patent: December 9, 1986
    Assignee: Ethyl Corporation
    Inventors: Silas W. Holmes, Edward A. Burt, Dixie E. Goins
  • Patent number: 4560809
    Abstract: A process for the production of a 2,6-dialkylphenol in high yield wherein the alkyl groups are secondary or tertiary with a reduced overall production of 4-alkylphenol by-products by the aluminum phenoxide catalyzed pressure reaction of isobutylene with phenol and a mixture of 2,4-dialkylphenol and 2,4,6-trialkylphenol which may be obtained, in a cyclic process, as a bottom stream from the distillation of the reaction mixture to obtain the 2,6-dialkylphenol product.
    Type: Grant
    Filed: October 9, 1984
    Date of Patent: December 24, 1985
    Assignee: Ethyl Corporation
    Inventors: Dixie E. Goins, Harold V. Huggins, Edward A. Burt, Silas W. Holmes