Patents by Inventor Kyle Lee Preston

Kyle Lee Preston 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: 6218582
    Abstract: A method for the preparation of methyl tertiary butyl ether is provided wherein a mixture of methanol and substantially peroxides-free tertiary butyl alcohol are catalytically reacted to form a reaction product comprising unreacted methanol, unreacted tertiary butyl alcohol, water, isobutylene and methyl tertiary butyl ether, that is separated into a substantially anhydrous first lighter distillation fraction comprising isobutylene, methanol and methyl tertiary butyl ether and a second heavier distillation fraction comprising methanol, tertiary butyl alcohol and water, and wherein the isobutylene and methanol in the first distillation fraction are reacted to form an isobutylene conversion product that contains additional methyl tertiary butyl ether that is substantially free from tertiary butyl alcohol.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: April 17, 2001
    Assignee: Huntsman International LLC
    Inventors: Charles Joseph Kruse, Kyle Lee Preston, Brian Lawrence Benac
  • Patent number: 5792890
    Abstract: A tertiary butyl alcohol charge stock contaminated with from about 0.5 to about 2 wt. % of corrosive oxygen-containing impurities, including peroxides and formates, is passed through an oxygenates decomposition reactor containing a bed of a basic zeolite catalyst to decompose the peroxides and oxygen-containing impurities, including peroxides and formates, and to dehydrate a portion of the tertiary butyl alcohol to form isobutylene and water to form a substantially less-corrosive tertiary butyl alcohol feedstock that is substantially free from oxygen-containing impurities, including formates that is suitable for reaction with methanol in a methyl tertiary butyl ether etherification reactor to form a methyl tertiary butyl ether etherification reaction product from which methyl tertiary butyl ether can be recovered.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: August 11, 1998
    Assignee: Huntsman Specialty Chemicals Corp.
    Inventors: Pei-Shing Eugene Dai, Laurence Darrel Neff, Kyle Lee Preston, Rei-Yu Judy Hwan, John Frederick Knifton
  • Patent number: 5789627
    Abstract: Methyl tertiary butyl ether is prepared from contaminated tertiary butyl alcohol and methanol by decomposing peroxides in a peroxides decomposition reactor, by dehydrating the tertiary butyl alcohol to form isobutylene and also decomposing acidic contaminants in a tertiary butyl alcohol dehydration reactor to form a feedstock that is distilled to provide a first lower boiling fraction comprising isobutylene and water; from which isobutylene is recovered for reaction with methanol in an etherification reactor containing a bed of an etherification catalyst to form methyl tertiary butyl ether.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: August 4, 1998
    Assignee: Huntsman Specialty Chemicals Corp.
    Inventors: Rei-Yu Judy Hwan, Kyle Lee Preston
  • Patent number: 5763685
    Abstract: MTBE is prepared from TBA and MeOH by passing a feed mixture comprising TBA and MeOH through a primary MTBE reaction zone to form a primary reaction product containing MTBE, unreacted TBA, unreacted MeOH, isobutylene and water; the primary reaction product is fractionated to provide a first lighter distillation fraction comprising isobutylene, MeOH and MTBE and a first higher boiling distillation fraction comprising MeOH, TBA and water and the first higher boiling distillation fraction is charged to a second stage MTBE reaction zone to form a second stage reaction product comprising unreacted MeOH, unreacted TBA water, isobutylene and MTBE.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: June 9, 1998
    Assignee: Huntsman Specialty Chemicals Corporation
    Inventors: Charles Joseph Kruse, Kyle Lee Preston, Brian Lawrence Benac
  • Patent number: 5744652
    Abstract: Methyl tertiary butyl ether is prepared from TBA contaminated with oxygen-containing impurities by decomposing the impurities to gaseous products, by charging the thus-treated tertiary butyl alcohol and methanol to an etherification reactor to form an etherification reaction product, by distilling the etherification reaction product to provide a lower boiling fraction containing isobutylene, methanol and methyl tertiary butyl ether by charging the lower boiling fraction to a finishing reactor to react the isobutylene and methanol contained therein to from additional MTBE and by recovering MTBE from the etherification reaction product and the isobutylene conversion product.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: April 28, 1998
    Assignee: Huntsman Specialty Chemicals Corp.
    Inventors: Pei-Shing Eugene Dai, Laurence Darrel Neff, Kyle Lee Preston, Rei-Yu Judy Hwan
  • Patent number: 5741951
    Abstract: Methyl tertiary butyl ether and diisobutylene are prepared by reacting methanol with tertiary butyl alcohol to provide an etherification reaction product containing methyl tertiary butyl ether, tertiary butyl alcohol, methanol, isobutylene, and water. A methyl tertiary butyl ether product fraction and an isobutylene fraction are recovered from the etherification reaction product; the isobutylene fraction is charged to an isobutylene conversion reaction zone to form a diisobutylene conversion product, and the diisobutylene conversion product is charged to a diisobutylene distillation zone and separated therein into a lower boiling distillation fraction comprising isobutylene, and diisobutylene and a higher boiling distillation fraction consisting essentially of diisobutylene.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: April 21, 1998
    Assignee: Huntsman Specialty Chemicals Corporation
    Inventor: Kyle Lee Preston
  • Patent number: 5741953
    Abstract: An aqueous methanol feed stream contaminated with tertiary butyl alcohol is charged to a reactive distillation column having a reaction distillation section in the upper portion thereof containing an acid cation exchange resin and separated therein into a substantially anhydrous lower boiling methanol fraction contaminated with isobutylene and a higher boiling water fraction by charging the feed stream to the lower portion of the reactive distillation column to separate the feed stream into a higher boiling water fraction and a lower boiling methanol fraction containing a tertiary butyl alcohol-water azeotrope for upward flow into the reactive distillation section for reaction of the tertiary butyl alcohol to form isobutylene, MTBE and water and recovery of a substantially anhydrous lower boiling methanol fraction contaminated with isobutylene and MTBE.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: April 21, 1998
    Assignee: Huntsman Specialty Chemicals Corporation
    Inventor: Kyle Lee Preston
  • Patent number: 5723698
    Abstract: Disclosed is a method for decomposing formate esters, free acids and peroxides in a tertiary butyl alcohol stream to produce noncondensible gas products which comprises reacting said tertiary butyl alcohol stream or a methyl tertiary butyl alcohol stream containing formate esters over a catalyst comprising a non-noble Group VIII metal and a metal of Group IB on a support comprising an inert composition mixed with a hydrotalcite-like composition.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: March 3, 1998
    Assignee: Huntsman Specialty Chemicals Corporation
    Inventors: Pei-Shing Eugene Dai, Laurence Darrel Neff, Kyle Lee Preston, Rei-Yu Judy Hwan
  • Patent number: 5705711
    Abstract: Tertiary butyl alcohol and methanol are reacted in a primary reactor in the presence of an acid cation exchange resin to provide a primary reaction product comprising methyl tertiary butyl ether, unreacted tertiary butyl alcohol, unreacted methanol, isobutylene, water and oxygen-containing by-products, and the primary reaction product is charged to a reactive distillation column where additional methyl tertiary butyl ether is prepared from the methanol, tertiary butyl alcohol and isobutylene present in the primary reaction product.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: January 6, 1998
    Assignee: Huntsman Specialty Chemicals Corporation
    Inventor: Kyle Lee Preston
  • Patent number: 5663454
    Abstract: Methanol and isobutylene are reacted to form a methyl tertiary butyl ether product stream containing contaminating quantities of dimethyl ether, methanol and isobutylene that is separated into a first fraction comprising isobutylene and methyl tertiary butyl ether and a second fraction comprising residual methyl tertiary butyl ether, methanol, dimethyl ether and water. The second fraction is separated into a first lower boiling distillation fraction comprising methyl tertiary butyl ether, methanol, isobutylene, dimethyl ether, and water and a first higher boiling distillation fraction comprising methanol and water. Dimethyl ether and isobutylene are recovered from the first lower boiling distillation fraction and charged to a second distillation column for separation into a second lower boiling distillation fraction consisting essentially of dimethyl ether and a second higher boiling distillation fraction comprising dimethyl ether and isobutylene.
    Type: Grant
    Filed: August 8, 1995
    Date of Patent: September 2, 1997
    Assignee: Huntsman Specialty Chemicals Corporation
    Inventor: Kyle Lee Preston