Patents by Inventor Alison E. Hadowanetz

Alison E. Hadowanetz 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).

  • Ashless antioxidant lubricating oil additive
    Patent number: 5559265
    Abstract: A method for producing an ashless, antioxidant lubricating oil additive. The method comprises:(a) reacting an alcohol with phosphorus pentasulfide to form a dithiophosphoric acid intermediate;(b) treating the dithiophosphoric acid intermediate with an expoxide to yield a corresponding dithiophosphoric ester alcohol product; and(c) recovering the dithiophosphoric ester alcohol product lubricant oil additive.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 24, 1996
    Assignee: Ethyl Additives Corporation
    Inventors: Doris Love, Alison E. Hadowanetz
  • Treated bound ferrierite zeolites for skeletal isomerization of n-olefins to iso-olefins
    Patent number: 5523510
    Abstract: A process of converting linear olefins to branched olefins by a skeletal isomerization reaction wherein said reaction is carried out at a temperature of between about 300.degree. C. and about 650.degree. C., under a pressure of between about 0.1 and about 100 atmospheres and a space velocity of said linear olefins of between about 0.1 and about 40 WHSV in the presence of a steamed then acid washed zeolite ferrierite catalyst.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: June 4, 1996
    Assignee: Texaco Inc.
    Inventors: Regis J. Pellet, Chi-Lin O'Young, John Hazen, Alison E. Hadowanetz, James E. Browne
  • Skeletal isomerization of n-olefins to iso-olefins on binded ferrierite zeolites
    Patent number: 5510560
    Abstract: The method of converting n-butylenes to isobutylene by a skeletal isomrization reaction wherein said reaction is carried out at a temperature of between 300.degree. C. and 650.degree. C., under a pressure of between 0.1 and 100 atmospheres and a space velocity of said n-butylenes of between 0.1 and 40 WHSV using a cagalyst comprising a zeolite binder selected frm the group consisting of alumina, silica, silica-alumina, clay and a combination thereof, said catalyst having a pore size of at least about 4.5 angstroms and the pore size structure is characteried by intersecting 10-member ring and 8-member ring channels.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: April 23, 1996
    Assignee: Texaco Inc.
    Inventors: Chi-Lin O'Young, Regis J. Pellet, Alison E. Hadowanetz, John Hazen, James E. Browne
  • Skeletal isomerization of n-butylenes to isobutylene on zeolites
    Patent number: 5491276
    Abstract: The conversion of normal olefins such as n-butylenes can be converted to branched olefin species such as isobutylene by skeletal isomerization over zeolite-based catalysts having pore sizes of at least about 4.5 Angstroms and a pore structure characterized by intersecting 10-MR and 8 MR channels. The zeolite-based catalysts have sufficient acidity to catalyze the skeletal isomerization of normal olefins. The catalysts can be used to produce isoolefins for reaction with alcohols in integrated processes to produce alkyl tertiary alkyl ethers such as MTBE.
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: February 13, 1996
    Assignee: Texaco Inc.
    Inventors: Chi-Lin O'Young, Regis J. Pellet, Alison E. Hadowanetz, John Hazen, James E. Browne