Patents by Inventor Pen-Chung Wang

Pen-Chung Wang 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).

  • Publication number: 20190194100
    Abstract: Implementations of the disclosed subject matter provide a method for producing glycols from an anhydrosugar feed. The method may include contacting, in a reactor under hydrogenolysis conditions, the anhydrosugar feed with a bi-functional catalyst system. The bi-functional catalyst system may include a retro-Aldol catalyst and a hydrogenation catalyst. A product stream may be obtained from the first reactor including ethylene glycol and propylene glycol.
    Type: Application
    Filed: August 21, 2017
    Publication date: June 27, 2019
    Inventors: Pen-Chung WANG, Smita EDULJI
  • Patent number: 10221370
    Abstract: A novel method of separating bio oil (pyrolysis oil) into oxygenated rich species and lignin/phenolic based species in a highly efficient manner is provided. Lignin and phenolic fractions can be separated from light oxygenates from bio oil by use of reversible ?-hydroxysulfonic acid.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: March 5, 2019
    Assignee: SHELL OIL COMPANY
    Inventors: Pen-Chung Wang, Paul Richard Weider, Robert Lawrence Blackbourn
  • Publication number: 20140373432
    Abstract: A method of producing fatty acid esters in situ from microbial biomass such as algae is provided by treating microbial biomass with a solution containing an alcohol and at least one ?-hydroxysulfonic acid. Fatty acid ester can be directly recovered from the treated microbial biomass. The ?-hydroxysulfonic acid can be easily removed from the treated microbial biomass and recycled.
    Type: Application
    Filed: June 23, 2014
    Publication date: December 25, 2014
    Inventors: Pen-Chung WANG, Paul Richard WEIDER, Robert Lawrence BLACKBOURN, Joseph James ALISHUSKY
  • Patent number: 8900833
    Abstract: A method of obtaining lipids from microbial biomass such as algae is provided by treating microbial biomass with a solution containing at least one ?-hydroxysulfonic acid to extract and recover liposoluble components. The ?-hydroxysulfonic acid can be easily removed from the product containing liposoluble components and recycled.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: December 2, 2014
    Assignee: Shell Oil Company
    Inventors: Pen-Chung Wang, Joseph James Alishusky, Robert Lawrence Blackbourn, Paul Richard Weider
  • Publication number: 20140259888
    Abstract: A novel method of separating bio oil (pyrolysis oil) into oxygenated rich species and lignin/phenolic based species in a highly efficient manner is provided. Lignin and phenolic fractions can be separated from light oxygenates from bio oil by use of reversible ?-hydroxysulfonic acid.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Applicant: SHELL OIL COMPANY
    Inventors: Pen-Chung WANG, Paul Richard Weider, Robert Lawrence BLACKBOURN
  • Patent number: 7358312
    Abstract: This invention describes epoxy-amine compositions that have low mix viscosity and a fast drying property at temperatures below freezing. The composition is useful for high solids coating applications, for adhesive and membrane applications, and for preparing impregnated substrates.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: April 15, 2008
    Assignee: Hexion Specialty Chemicals, Inc.
    Inventors: Christian Jean Charles De Cock, Pascale Charlotte Agnes Marie Ghislaine Claeys Bouuaert, Derek Scott Kincaid, Karin Van Poppel, Dominique Elisabeth Marie Vandenberghe, Pen Chung Wang
  • Patent number: 6956086
    Abstract: A amidoamine composition containing oligomeric amidoamine compounds having the structure: the average of x based on the amidoamine composition is at least 0.2, and Z is the residue of a polyoxyalkylene polyether polycarboxylic acid compound, and the amidoamine composition is the reaction product of primary polyamine compounds with polyoxyalkylene polyether polycarboxylic acid compounds at a corresponding equivalent weight ratio of at least 4.0:1 under oligomeric reaction conditions effective to increase the amine nitrogen equivalent weight of the amidoamine composition by at least 10% over the average acid equivalent weight of said polyoxyalkylene polyether polyacid composition. There is also provided glycidated amidoamine compositions used as epoxy functional surfactants, and the aqueous epoxy resin dispersions thereof, and the curable epoxy resin compositions thereof.
    Type: Grant
    Filed: September 24, 2003
    Date of Patent: October 18, 2005
    Assignee: Resolution Performance Products, LLC
    Inventors: Gayle Edward Back, Pen-Chung Wang, Larry Steven Corley, Jimmy D. Elmore
  • Publication number: 20040242835
    Abstract: This invention describes epoxy-amine compositions that have low mix viscosity and a fast drying property at temperatures below freezing.
    Type: Application
    Filed: July 12, 2004
    Publication date: December 2, 2004
    Inventors: Christian Jean Charles De Cock, Pascale Charlotte Agnes Marie Ghislaine, Derek Scott Kincaid, Karin Van Poppel, Dominique Elisabeth Marie Vandenberghe, Pen Chung Wang
  • Publication number: 20040063901
    Abstract: A amidoamine composition containing oligomeric amidoamine compounds having the structure: 1
    Type: Application
    Filed: September 24, 2003
    Publication date: April 1, 2004
    Inventors: Gayle Edward Back, Pen-Chung Wang, Larry Steven Corley, Jimmy D. Elmore
  • Patent number: 6653436
    Abstract: A amidoamine composition containing oligomeric amidoamine compounds having the structure: the average of x based on the amidoamine composition is at least 0.2, and Z is the residue of a polyoxyalkylene polyether polycarboxylic acid compound, and the amidoamine composition is the reaction product of primary polyamine compounds with polyoxyalkylene polyether polycarboxylic acid compounds at a corresponding equivalent weight ratio of at least 4.0:1 under oligomeric reaction conditions effective to increase the amine nitrogen equivalent weight of the amidoamine composition by at least 10% over the average acid equivalent weight of said polyoxyalkylene polyether polyacid composition. There is also provided glycidated amidoamine compositions used as epoxy functional surfactants, and the aqueous epoxy resin dispersions thereof, and the curable epoxy resin compositions thereof.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: November 25, 2003
    Assignee: Resolution Performance Products LLC
    Inventors: Gayle Edward Back, Pen-Chung Wang, Larry Steven Corley, Jimmy D. Elmore
  • Publication number: 20020111422
    Abstract: A amidoamine composition containing oligomeric amidoamine compounds having the structure: 1
    Type: Application
    Filed: December 8, 2000
    Publication date: August 15, 2002
    Inventors: Gayle Edward Back, Pen-Chung Wang, Larry Steven Corley, Jimmy D. Elmore
  • Patent number: 6359037
    Abstract: An aqueous system comprises at least one epoxy resin and a reaction product with an amine equivalent weight of at least 50 prepared by the reaction of an (A) epoxy-functional amidoamine derived from at least one epoxy resin and an amidoamine obtained via the reaction of an acid-terminated polyalkylene glycol and a diamine in an active hydrogen:epoxy groups ratio of from 1:15 to 1:350, with (B) at least one polyamine in an active amine hydrogen:epoxy groups equivalent ratio of from 2:1 to 30:1, and, optionally (C) a monoepoxide in a remaining active amine hydrogen:epoxy groups equivalent ratio of from 5:1 to 20:1.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: March 19, 2002
    Inventors: Charles J. Stark, Gayle Edward Back, Jimmy D. Elmore, Kalyan Ghosh, Pen-Chung Wang, Kailash Dangayach
  • Patent number: 6277928
    Abstract: A water-dispersible curing agent for epoxy resins is prepared by the reaction of (a) an epoxy-functional compound obtained from the reaction of at least one epoxy resin and an amidoamine derived from the reaction of an acid-terminated polyalkylene glycol and a diamine in an active amine hydrogen:epoxy groups ratio of from 1:15 to 1:350, (b) at least one polyamine in an active amine hydrogen:epoxy groups ratio of from 2:1 to 30:1 which yields an amine-terminated product having an amine equivalent weight of at least 50, and, optionally, (c) a monoepoxy in a remaining active amine hydrogen:epoxy groups ratio of from 5:1 to 20:1.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: August 21, 2001
    Inventors: Charles J. Stark, by Ann E. Stark, adminstrator, Gayle Edward Back, Jimmy D. Elmore, Kalyan Ghosh, Pen-Chung Wang, Kailash Dangayach
  • Patent number: 6235931
    Abstract: A process for partially oxidizing and converting a polyoxyalkylene polyol composition to a polycarboxylic acid composition comprising reacting a polyoxyalkylene polyol composition with a stable free radical nitroxide in the presence of an NOx generating compound, a flow of air or oxygen, and optionally water, at elevated temperatures. The oxidation reaction is discontinued by deactivating the catalyst and removing the source of air or oxygen, the NOx generating source, and the optional water. From 60% to no more than 95% of the polyoxyalkylene polyol composition is converted.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: May 22, 2001
    Assignee: Shell Oil Company
    Inventors: Pen-Chung Wang, Gayle Edward Back, Glynnda Addicks, Jimmie Dale Elmore, Herbert Elliott Fried
  • Patent number: 6221934
    Abstract: Stable aqueous emulsions of epoxy resins are provided using an epoxy-functional surfactant prepared by reacting an amidoamine having the formula: wherein R1 is an alkyl, aryl, or arylalkyl group or mixtures thereof having 1 to 15 carbon atoms, R2 is aliphatic, cycloaliphatic, or aromatic group having 2 to 18 carbon atoms optionally containing non-reactive oxygen or at most all average of 4 secondary and/or tertiary nitrogen atoms per structure in the backbone, X and Y are independently a hydrogen, methyl or ethyl group with the provision that if X is methyl or ethyl, Y is hydrogen or if Y is methyl or ethyl, X is hydrogen, and n+m+o is a real number from 40 to 400, and n+o is a real number in an amount effective to provide resin emulsification, and the ratio of (I) to (II) by weight.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: April 24, 2001
    Assignee: Shell Oil Company
    Inventors: Charles J. Stark, Jimmy D. Elmore, Gayle Edward Back, Pen-Chung Wang, Ernest Charles Galgoci, Jr.
  • Patent number: 6136894
    Abstract: An aqueous epoxy resin system suitable for coatings comprises (a) water, (b) at least one epoxy resin and (c) a curing agent prepared by (i) reacting at least one polyamine having at least 3 active amine hydrogen atoms per molecule and at least one epoxy resin in an epoxy equivalent to to polyamine mole ratio of from 0.9:1 to 1:10 to obtain an amine-terminated intermediate; (ii) reacting the amine-terminated intermediate with from 0.5 to 25 weight percent, based on the amine-terminated intermediate, of an acid-terminated polyalkylene glycol to yield an amine-terminated curing agent. The amine-terminated intermediate can be capped with a monoepoxide in an amine hydrogen to epoxy groups ratio of from about 1.5:1 to 30:1 prior to reaction with the acid-terminated polyalkylene glycol, or the amine-terminated curing agent following step (ii) can be capped with a monoepoxide in an amine hydrogen atoms to epoxy groups ratio of from about 2:1 to 30:1.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: October 24, 2000
    Assignee: Shell Oil Company
    Inventors: Charles J. Stark, deceased, Gayle Edward Back, Jimmy D. Elmore, Kalyan Ghosh, Pen-Chung Wang, Kailash Dangayach
  • Patent number: 6127459
    Abstract: A water-compatible curing agent for epoxy resins is prepared by (a) reacting at least one polyamine having at least 3 active amine hydrogen atoms per molecule and at least one epoxy resin in an epoxy equivalent to polyamine mole ratio of from 0.9:1 to 1:10 to obtain an amine-terminated intermediate; (b) reacting the amine-terminated intermediate with from 0.5 to 25 weight percent, based on the amine-terminated intermediate, of an acid-terminated polyalkylene glycol to yield an amine-terminated curing agent. The amine-terminated intermediate can be capped with a monoepoxide in an amine hydrogen atoms to epoxy groups ratio of from about 1.5:1 to 30:1 prior to reaction with the acid-terminated polyalkylene glycol, or the amine-terminated curing agent produced following step (b) can be capped with a monoepoxide.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: October 3, 2000
    Assignee: Shell Oil Company
    Inventors: Charles J. Stark, deceased, Gayle Edward Back, Jimmy D. Elmore, Kalyan Ghosh, Pen-Chung Wang, Kailash Dangayach
  • Patent number: 5843580
    Abstract: An emulsion of a copolymer of carbon monoxide with an olefinically unsaturated compound dispersed in an aqueous diluent; a curable resin composition in the form of an oil-in-water emulsion comprising a copolymer of carbon monoxide with an olefinically unsaturated compound and a curing agent; and a process for producing a laminated wood composite comprising applying said curable resin composition onto wood parts of the composite, bringing the wood parts of the composite together such that curable resin composition is positioned between adjacent wood parts, and curing the curable resin such that after curing cured resin adheres adjacent wood parts to one another.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: December 1, 1998
    Assignee: Shell Oil Company
    Inventors: Evert van der Heide, Gerrit Vietje, Pen-Chung Wang
  • Patent number: 5837867
    Abstract: The present invention is directed to the use of cyclic amide alkoxylate compounds as additives in fuel compositions having a major amount of a mixture of hydrocarbons in the gasoline boiling range and a minor amount of one or more cyclic amide alkoxylate compounds of the formula: ##STR1## wherein x is from 2 to 20 and y is from 1 to 50. R.sub.1 and R.sub.2 are independently hydrogen or hydrocarbyl of 1 to 100 carbon atoms. R.sub.3 is hydrocarbyl of 1 to 100 carbon atoms and R.sub.4 is independently hydrocarbyl of 2 to 100 carbon atoms. R.sub.5 is hydrogen, hydrocarbyl of 1 to 100 carbon atoms or acyl of 1 to 20 carbon atoms.The invention is also directed to the use of these cyclic amide alkoxylate compounds for decreasing intake valve deposits, controlling octane requirement increases and reducing octane requirement. The invention is further directed to novel cyclic amide alkoxylate compounds.
    Type: Grant
    Filed: August 6, 1996
    Date of Patent: November 17, 1998
    Assignee: Shell Oil Company
    Inventors: Jiang-Jen Lin, Charles Lee Edwards, Pen-Chung Wang, Garo Garbis Vaporciyan
  • Patent number: 5693107
    Abstract: The present invention is directed to the use of hydantoin-containing polyether alcohols as additives in a gasoline composition. The invention is also directed to the use of these compounds for decreasing intake valve deposits, controlling octane requirement increases and reducing octane requirement. The invention is further directed to hydantoin-containing compounds.
    Type: Grant
    Filed: August 6, 1996
    Date of Patent: December 2, 1997
    Assignee: Shell Oil Company
    Inventors: Jiang-Jen Lin, Pen-Chung Wang, Sarah Louise Weaver