Patents by Inventor Santi Kulprathipanja

Santi Kulprathipanja 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: 5177300
    Abstract: The separation of naphthalene in high purity from coal tar or petroleum fractions by an adsorptive chromatographic process and liquid phase with lithium-exchanged X zeolite as the adsorbent and aromatic desorbents.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: January 5, 1993
    Assignee: UOP
    Inventors: Santi Kulprathipanja, Kenneth Kuhnle, Marjorie S. Patton, Richard L. Fergin
  • Patent number: 5175324
    Abstract: The separation of monounsaturated triglycerides from polyunsaturated triglycerides is achieved by an adsorptive chromatographic process in liquid phase with silica gel as the adsorbent at temperatures higher than about 100.degree. C. Desorbents in the separation process include ketones, having from 3 to 8 carbon atoms in concentrations of up to about 25% (vol.) in normal or branched alkanes, e.g., n-hexane or iso-octane, or p-cymene in concentrations of 20% (vol.) to 100%.
    Type: Grant
    Filed: April 19, 1991
    Date of Patent: December 29, 1992
    Assignee: UOP
    Inventor: Santi Kulprathipanja
  • Patent number: 5127925
    Abstract: A fluid feed mixture, either liquid or gaseous in nature, may be subjected to a gas enrichment separation process. The process is effected by contacting the mixture with the upstream face of a mixed matrix membrane which comprises an organic polymer having a solid particulate adsorbent incorporated therein, the permeability coefficient of the organic polymer being compatible with the permeability coefficient of the adsorbent. The permeate which emanates from the downstream face of the membrane comprises a fluid product mixture in which the proportion of the first fluid component of the feed mixture, which possesses a greater steady state permeability in relation to the second fluid component, is greater than the proportion present in the original fluid feed mixture.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: July 7, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Santi Kulprathipanja, Richard W. Neuzil, Norman N. Li
  • Patent number: 5068418
    Abstract: Lactic acid is separated from a fermentation broth by using an adsorbent comprising a water-insoluble macroreticular or gel weakly basic anionic exchange resin possessing tertiary amine or pyridine functional groups or a strongly basic anionic exchange resin possessing quaternary amine fuctional groups. The resins are in sulfate form and have a cross-linked acrylic or styrene resin matrix. Lactic acid is desorbed with water or dilute inorganic acid, e.g., sulfuric. The pH of the feed is maintained below the ionization constant (pKa) of lactic acid to obtain high selectivity.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: November 26, 1991
    Assignee: UOP
    Inventors: Santi Kulprathipanja, Anil R. Oroskar
  • Patent number: 5068419
    Abstract: An organic acid is separated from a fermentation broth by using an adsorbent comprising a water-insoluble macroreticular or gel weakly basic anionic exchange resin possessing tertiary amine or pyridine functional groups or a strongly basic anionic exchange resin possessing quaternary amine functional groups. The resins are in sulfate form and have a cross-linked acrylic or styrene resin matrix. The organic acid is desorbed with water or dilute inorganic acid, e.g., sulfuric. The pH of the feed is maintained below the first ionization constant (pKa.sub.1) of the organic acid to obtain high selectivity.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: November 26, 1991
    Assignee: UOP
    Inventors: Santi Kulprathipanja, Anil R. Oroskar
  • Patent number: 5000794
    Abstract: Glucose is separated from mixtures with mannose and other saccharides by adsorption on low aluminum Y-type zeolites, i.e., having up to about 50 atoms of aluminum per unit cell and desorbing the adsorbate with water. Glucose is removed from the adsorption process in the raffinate.
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: March 19, 1991
    Assignee: UOP
    Inventor: Santi Kulprathipanja
  • Patent number: 4992618
    Abstract: The separation of normal paraffins from non-normal hydrocarbons wherein the paraffins have from about 10 to about 35 carbon atoms per molecule, using a molecular sieve adsorbent having an effective channel diameter of about 5 angstroms wherein an improvement in the process comprises passing a non-normal hydrocarbon input stream into the adsorption zone at adsorption conditions to promote the selective adsorption of the straight chain hydrocarbon constituents of the feed material in contact with the adsorbent in preference to the lighter straight chain hydrocarbon constituents of the desorbent material also in contact with adsorbent.
    Type: Grant
    Filed: August 9, 1989
    Date of Patent: February 12, 1991
    Assignee: UOP
    Inventor: Santi Kulprathipanja
  • Patent number: 4924027
    Abstract: Salts of citric acid are separated from a fermentation broth by a two-step process utilizing an adsorbent comprising a water-insoluble, macroreticular gel, weakly basic, anionic exchange resin possessing tertiary amine functional groups or pyridine functional groups, said anionic exchange resin comprising a crosslinked acrylic or styrene resin matrix and a desorbent comprising water or dilute sulfuric acid. The pH of the feed, a fermentation broth, containing citric acid, is adjusted and maintained below the first ionization constant (pKa.sub.1) of citric acid to maintain selectivity in the first step wherein citric acid is adsorbed onto the adsorbent. Then, citric acid is converted to a salt by a reaction with an aqueous alkaline liquid solution and is eluted immediately at the void volume in the alkaline solution.
    Type: Grant
    Filed: November 25, 1988
    Date of Patent: May 8, 1990
    Assignee: UOP
    Inventors: Santi Kulprathipanja, Scott A. Strong
  • Patent number: 4880919
    Abstract: Arabinose is separated from mixtures of monosaccharides containing arabinose and other aldopentoses and aldohexoses by adsorption on sulfonated polystyrene divinylbenzene crosslinked ion exchange resins exchanged with calcium-ammonium cationic and desorbing the adsorbate with water. The other saccharides are removed from the adsorption process in the raffinate.
    Type: Grant
    Filed: December 31, 1986
    Date of Patent: November 14, 1989
    Assignee: UOP
    Inventor: Santi Kulprathipanja
  • Patent number: 4857642
    Abstract: A process for the liquid phase adsorptive separation of arabinose from an aqueous feed mixture of monosaccharides containing arabinose along with other aldoses and ketoses. The feed is contacted with an ammonium X-type zeolite. Arabinose is selectively absorbed to the substantial exclusion of other aldoses and ketoses and thereafter is recovered in high purity by desorption with water. The process can be carried out on a commercial scale by means of a simulated moving bed flow scheme.
    Type: Grant
    Filed: December 31, 1986
    Date of Patent: August 15, 1989
    Assignee: UOP
    Inventor: Santi Kulprathipanja
  • Patent number: 4851574
    Abstract: Citric acid is separated from a fermentation broth by using an adsorbent comprising a strongly water-insoluble, macroreticular or gel, basis anionic exchange resin possessing quaternary amine functional groups, said a anionic exchange resin having a cross-linked acrylic or styrene resin matrix and a desorbent comprising water or dilute sulfuric acid. The pH of the feed is maintained below the first ionization constant (pKa.sub.1) of citric acid to maintain selectivity.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: July 25, 1989
    Assignee: UOP Inc.
    Inventor: Santi Kulprathipanja
  • Patent number: 4851573
    Abstract: Citric acid is separated from a fermentation broth by using an adsorbent comprising a water-insoluble macroreticular or gel weakly basic anionic exchange resin possessing tertiary amine functional groups or pyridine functional groups, said anionic exchange resin comprising a cross-linked acrylic or styrene resin matrix. Citric acid is desorbed by water or dilute sulfuric acid. The pH of the feed is maintained below the first ionization constant (pKa.sub.1) of citric acid to maintain selectivity.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: July 25, 1989
    Assignee: UOP
    Inventors: Santi Kulprathipanja, Anil R. Oroskar, James W. Priegnitz
  • Patent number: 4837315
    Abstract: Mannose is separated from mixtures with glucose and other saccharides by adsorption of sulfonated polystyrene divinylbenzene crosslinked ion exchange resins, and desorbing the adsorbate with water. Glucose is removed from the adsorption process in the raffinate.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: June 6, 1989
    Assignee: UOP
    Inventor: Santi Kulprathipanja
  • Patent number: 4751104
    Abstract: Gas separation membranes which possess improved characteristics as exemplified by selectivity and flux may be prepared by coating a porous organic polymer support with a solution or emulsion of a plasticizer and an organic polymer, said coating being effected at subatmospheric pressures in order to increase the penetration depth of the coating material.
    Type: Grant
    Filed: December 6, 1984
    Date of Patent: June 14, 1988
    Assignee: UOP Inc.
    Inventors: Santi Kulprathipanja, Sudhir S. Kulkarni, Edward W. Funk
  • Patent number: 4740219
    Abstract: A fluid feed mixture, either liquid or gaseous in nature, may be subjected to a gas enrichment separation process. The process is effected by contacting the mixture with the upstream face of a mixed matrix membrane which comprises an organic polymer having a solid particulate adsorbent incorporated therein, the permeability coefficient of the organic polymer being compatible with the permeability coefficient of the adsorbent. The permeate which emanates from the downstream face of the membrane comprises a fluid product mixture in which the proportion of the first fluid component of the feed mixture, which possesses a greater steady state permeability in relation to the second fluid component, is greater than the proportion present in the original fluid feed mixture.
    Type: Grant
    Filed: May 1, 1986
    Date of Patent: April 26, 1988
    Assignee: Allied-Signal Inc.
    Inventors: Santi Kulprathipanja, Richard W. Neuzil, Norman N. Li
  • Patent number: 4737165
    Abstract: A multicomponent membrane which may be used for separating various components which are present in a fluid feed mixture comprises a mixture of a plasticizer such as a glycol and an organic polymer cast upon a porous organic polymer support. The membrane may be prepared by casting an emulsion or a solution of the plasticizer and polymer on the porous support, evaporating the solvent and recovering the membrane after curing.
    Type: Grant
    Filed: April 25, 1985
    Date of Patent: April 12, 1988
    Assignee: UOP Inc.
    Inventors: Santi Kulprathipanja, Sudhir S. Kulkarni, Edward W. Funk
  • Patent number: 4735193
    Abstract: A process for separating a monosaccharide from an aqueous solution comprising monosaccharides and a second component comprising a polysaccharide. The mixture is contacted with a mixed matrix membrane comprising a adsorbent or molecular sieve material dispersed in an organic polymer in which the monosaccharide has a greater steady state permeability than the polysaccharide. The monosaccharide passes through the membrane, and is recovered. Particular mixed matrix membranes found to be useful in separating mono from polysaccharides are silicalite, gamma-alumina, activated carbon or a calcium exchanged Y-zeolite dispersed in cellulose acetate or polyelectrolyte complex polymers.
    Type: Grant
    Filed: February 8, 1985
    Date of Patent: April 5, 1988
    Assignee: UOP Inc.
    Inventors: Santi Kulprathipanja, Edward W. Funk, Sudhir S. Kulkarni, Y. Alice Chang
  • Patent number: 4720579
    Abstract: Citric acid is separated from a fermentation broth by using an adsorbent comprising a neutral, noniogenic, macroreticular, water-insoluble, crosslinked styrene-poly(vinyl)benzene and a desorbent comprising water and, optionally, acetone with the water. The pH of the feed is adjusted and maintained below the first ionization constant (pKa.sub.1) of citric acid to maintain selectivity.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: January 19, 1988
    Assignee: UOP Inc.
    Inventor: Santi Kulprathipanja
  • Patent number: 4719242
    Abstract: A method for the preparation of an ion exchange sorbent containing at least one anion exchange resin, a ferromagnetic substance, and a water permeable organic polymer binder, as well as a process for the use of said sorbent to separate removable anions from feed streams containing said anions.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: January 12, 1988
    Assignee: Allied-Signal Inc.
    Inventors: Stephen F. Yates, Santi Kulprathipanja
  • Patent number: 4608060
    Abstract: Polar gases such as hydrogen sulfide, sulfur dioxide and ammonia may be separated from nonpolar gases such as methane, nitrogen, hydrogen or carbon dioxide by passing a mixture of polar and nonpolar gases over the face of a multicomponent membrane at separation conditions. The multicomponent membrane which is used to effect the separation will comprise a mixture of a glycol plasticizer having a molecular weight of from about 200 to about 600 and an organic polymer cast on a porous support. The use of such membranes as exemplified by polyethylene glycol and silicon rubber composited on polysulfone will permit greater selectivity accompanied by a high flux rate in the separation process.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: August 26, 1986
    Assignee: UOP Inc.
    Inventors: Santi Kulprathipanja, Sudhir S. Kulkarni