Patents by Inventor Thomas I. Evans

Thomas I. Evans 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).

  • Selective olefin oligomerization
    Patent number: 6376731
    Abstract: A process is provided for the production of a gasoline blending fraction rich in isooctane by the dimerization of isobutylene using tertiary butyl alcohol modifier and lower alkane diluent; advantageously the isobutylene is derived from the dehydration of tertiary butyl alcohol.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: April 23, 2002
    Assignee: Arco Chemical Technology, l.p.
    Inventors: Thomas I. Evans, Lawrence J. Karas, Ramesh Rameswaran
  • Purification process
    Patent number: 5993673
    Abstract: A propylene oxide/styrene monomer aqueous purge stream is contacted with a solid iron promoted alumina catalyst at conditions effective to decompose peroxides contained therein.
    Type: Grant
    Filed: September 24, 1998
    Date of Patent: November 30, 1999
    Assignee: Arco Chemical Technology, L.P.
    Inventors: Thomas I. Evans, David W. Leyshon
  • Isobutylene oligomerization using isooctane diluent
    Patent number: 5877372
    Abstract: A process is provided for the production of a gasoline blending fraction rich in isooctane by the dimerization of isobutylene using tertiary butyl alcohol modifier and isoalkane diluent; advantageously the isobutylene is derived from the dehydration of tertiary butyl alcohol and the isoalkane used as diluent in the dimerization is the product formed by hydrogenation of the oligomerization product.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: March 2, 1999
    Assignee: Arco Chemical Technology, L.P.
    Inventors: Thomas I. Evans, Lawrence J. Karas, Ramesh Rameswaran
  • Molybdenum epoxidation catalyst recovery
    Patent number: 5776848
    Abstract: An aqueous epoxidation process stream containing molybdenum and sodium values is incinerated and an aqueous solution containing molybdenum and sodium is recovered, acidified and reacted with a calcium compound without first adding base to form solid CaMoO.sub.4 which is separated.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: July 7, 1998
    Assignee: Arco Chemical Technology, L.P.
    Inventors: Thomas I. Evans, Robert L. Cannon
  • Molybdenum epoxidation catalyst recovery
    Patent number: 5731446
    Abstract: An aqueous epoxidation process stream containing molybdenum and sodium values and organics is treated for organics removal as by incineration and an aqueous solution containing molybdenum and sodium is recovered, cooled, acidified and contacted with activated carbon and an aqueous stream reduced in molybdenum is recovered, further molybdenum reduction can be achieved by treatment with basic ion exchange resin.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: March 24, 1998
    Assignee: ARCO Chemical Technology, L.P.
    Inventors: Rajendra S. Albal, Thomas I. Evans, W. Wayne Wentzheimer, Allen M. Donn, Morris Gelb
  • Acidification/extraction treatment of waste caustic stream
    Patent number: 5675055
    Abstract: The waste organics containing caustic stream from a propylene oxide/styrene monomer process is preferably first concentrated by distillation and then contacted with strong acid such as sulfuric acid and an organic solvent, the admixture is phase separated and an aqueous sodium containing phase reduced in organics is separated from an organic solvent phase reduced in sodium.
    Type: Grant
    Filed: October 4, 1995
    Date of Patent: October 7, 1997
    Assignee: ARCO Chemical Technology, L.P.
    Inventors: Thomas I. Evans, Bernard Cooker, Rajendra S. Albal
  • Molybdenum epoxidation catalyst recovery
    Patent number: 5585077
    Abstract: An aqueous epoxidation process stream containing molybdenum and sodium values and organics is treated for organics removal as by incineration and an aqueous solution containing molybdenum and sodium is recovered, acidified and reacted with a calcium compound to form solid CaMoO.sub.4 which is separated.
    Type: Grant
    Filed: August 3, 1995
    Date of Patent: December 17, 1996
    Assignee: ARCO Chemical Technology, L.P.
    Inventors: Thomas I. Evans, Stephen H. Harris
  • Molybdenum recovery from epoxidate
    Patent number: 5503813
    Abstract: Epoxidate from the molybdenum catalyzed epoxidation of an olefin such as propylene with a hydroperoxide such as ethylbenzene hydroperoxide is treated with 2 to 15 times the stoichiometric equivalent of aqueous base such as sodium hydroxide to form Na.sub.2 MoO.sub.4 and the resulting mixture is phase separated to separate an organic phase reduced in molybdenum and a net aqueous stream containing removed molybdenum, the mass ratio of the organic phase to the net aqueous stream being 450-3,000/I.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: April 2, 1996
    Assignee: ARCO Chemical Technology, L.P.
    Inventor: Thomas I. Evans