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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Su; Wei-Yang
Address:
Austin, TX
No. of patents:
63
Patents:


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Patent Number Title Of Patent Date Issued
7169268 Color stabilization of amines January 30, 2007
The present invention concerns a process for providing tertiary amine products which are color-stable, and have a greatly reduced tendency to take on color during their storage. According to the invention, an ethyleneamine derivative is added to the distillation pot prior to or durin
7074963 Preparation of secondary amines July 11, 2006
Disclosed herein is a process for the reductive alkylation of primary amines to form secondary amines, by high pressure reaction of the primary amine with an alkylating agent and hydrogen in the presence of a catalyst which comprises metallic palladium. A process of the present invention
6888030 Advances in amination May 3, 2005
Inclusion of a branched alcohol in the catalytic hydrogenation reaction involving an aliphatic nitro compound dramatically increases the efficiency of the conversion of nitro groups into amino groups. This discovery is of particular value in the production of polyalkyleneamines via n
6340559 Semiconductor developing agent January 22, 2002
Provided herein are developer solutions useful in producing semiconductor-based circuit elements or precursors thereof, which contain tris-(2-hydroxyethyl)methylammonium hydroxide. Developers according to the invention are either aqueous or alcoholic solutions of tris-(2-hydroxyethyl
6210452 Fuel additives April 3, 2001
Highly effective fuel additives that control the formation of deposits in internal combustion engines, particularly, in the fuel injection system and combustion chamber of such engines. The fuel additives comprise carboxylic acid alkoxylates, and are particular suited for use with ni
6191317 Process for preparation of polyalkyl hydroxyaromatics February 20, 2001
Polyalkyl hydroxyaromatics may be prepared from polyalkylenes and hydroxyaromatics in the presence of an acid catalyst and an organic solvent having a boiling point range with an initial boiling point value of below or about the boiling point of the selected hydroxyaromatic reactants
6093854 Process for preparing alkanolamines from polyolefin epoxides July 25, 2000
Disclosed herein is a process for producing alkanolamines from the reaction between a polyolefin epoxide and an organic amino compound under conditions of elevated temperature and pressure, in the presence of a catalytic amount of an alcohol. Higher reaction rates for alkanolamine pr
6063145 Fuel compositions containing etheramine alkoxylates May 16, 2000
This invention concerns a fuel additive comprising an etheramine alkoxylate, and fuel compositions and additive concentrates made therefrom. The etheramine alkoxylate may be of formula: ##STR1## where R.sup.1 is a straight or branched alkyl, or alkylaryl; R.sup.2 is independently
6060625 Process for the production of etheramine alkoxylates May 9, 2000
A process for the alkoxylation of a polyetheramine to form an etheramine alkoxylate. In the process, a polyetheramine is reacted with an alkylene oxide in the presence of an alcohol to form the etheramine alkoxylate. The alcohol serves as a catalyst to allow the reaction proceed at a hei
5861051 Process for removing carbon dioxide from gas mixture January 19, 1999
This invention relates to a process for the separation of carbon dioxide and hydrogen sulfide from gases using a promoted methyldiethanolamine (MDEA) solution. In one broad respect, this invention is a gas separation process, including contacting an aqueous treating solution with a sour
5782938 Fuel composition July 21, 1998
This invention concerns a an amidoalkanolaminoester composition obtained by reacting: (1) a reaction product of dialkyl maleate such as diethyl maleate and an alkylalkanolamine such as N-methylethanolamine; with (2) a hydrocarbyl oxypolyoxyalkene amine represented by the formula ##ST
5516343 Hydrocarbon compositions containing a polyetheramide additive May 14, 1996
The instant invention relates to a hydrocarbon composition, such as motor fuel and lubricant compositions, containing a polyetheramide as a deposit control additive, to a concentrate containing such a polyetheramide as a deposit control additive, and to a method for improving the operati
5436351 Imidazolidone polyetheramide surfactant July 25, 1995
Disclosed is a novel composition of the formula: ##STR1## wherein R=H, methyl, ethyl, or a mixture thereof and R.sup.5 =a saturated or unsaturated alkyl group from a fatty acid containing 7 to 22 carbon atoms and a+b=n, wherein n is from about 2 to 80, resulting from alkoxylating
5422042 Imidazolidone polyetheramine strength enhancing additives of epoxy resin systems June 6, 1995
This invention discloses the composition and preparation of imidazolidone modified polyetheramines. The alkyl polyetheramine is derived from 2-isopropylaminoethylamine and urea. N-isopropyl-2-imidazolidone is the intermediate product, which is alkoxylated and aminated to prepare the
5383942 Fuel composition January 24, 1995
An amido alkanolamine composition obtained by reacting, at a temperature of 10.degree. C.-200.degree. C.:(a) a 4-alkyl-2-morpholinone represented by the formula: ##STR1## in which R represents a monovalent aliphatic radical having from 1 to 10 carbon atoms; and(b) a hydrocarbyl oxypo
5364971 Decolorization of polyethylene polyamines using ruthenium November 15, 1994
The present invention relates to a process for the reduction of the color of polyamines by reacting at elevated temperature, e.g. 120.degree.-170.degree. C., and pressure, e.g. 500 to 6000 psig. the colored polyamines, e.g. triethylenetetramine and tetraethylenepentamine, in the pres
5362914 Decolorization of polyethylene polyamines using cobalt/copper/chromium November 8, 1994
The present invention relates to a process for the reduction of the color of polyamines by reacting at elevated temperature, e.g. 120.degree.-170.degree. C., and pressure, e.g. 500 to 6000 psig. the colored polyamines, e.g. triethylenetetramine and tetraethylenepentamine, in the pres
5288873 Aminated alkoxylated imidazolidones February 22, 1994
Disclosed is a novel polyetherdiamine comprising an aminated, alkoxylated 1,2'-hydroxyethyl-2-imidazolidone represented by the formula: ##STR1## where R is H or an alkyl group of from 1 to 16 carbon atoms, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are selected from the group consisting o
5286267 Polyether hydroxyethylaminoethyl oxalamide motor fuel detergent additives February 15, 1994
The present invention provides a novel class of compounds, useful as gasoline detergent additives, which is a polyether hydroxyethylaminoethyl oxalamide represented by the formula ##STR1## where R is a (C.sub.5 -C.sub.25) alkyl group and n is an integer between about 5 and about
5276192 Preparation of phenoxyethanamines January 4, 1994
A process for preparing phenoxyethanamines from phenols and 2-oxazolines in quantitative yields was discovered. Phosphoric acid hydrolyzes the amide intermediate from the phenol/2-oxazoline reaction without cleaving the amide at the ether linkage and without undesired aromatic ring s
5250638 Epoxy resin curatives and method using lactone-imidazole complexes October 5, 1993
An epoxy resin composition comprises the cured reaction product of an epoxy resin and a lactone-imidazole complex. For example, complexes of butyrolactone and caprolactone with 1-isopropyl-2-methyl imidazole were formed wherein the mole ratio of lactone:imidazole ranged from 1:1 to 2:1.
5250632 Heimd-containing polyetheramine curative for flexible, toughened products October 5, 1993
Disclosed is a novel polyetherdiamine comprising an aminated, alkoxylated 1-2'-hydroxyethyl-2-imidazolidone represented by the formula: ##STR1## where R is H or an alkyl group of from 1 to 16 carbon atoms and a+b=n, wherein n is a number from about 2 to 80, and to its use in epoxy re
5238971 Polyoxyalkylene glycols containing imidazolidones August 24, 1993
This invention is concerned with polyoxyalkylene glycols prepared by alkoxylating a hydroxyalkyl-2-imidazolidone and to a process for preparing flexible polyurethane foams by reacting an organic isocyanate with an admixture of a polyether polyol and an alkoxylated hydroxyalkyl-2-imid
5234478 Fuel additive method of preparation and motor fuel composition August 10, 1993
An amido alkanolamine composition obtained by reacting, at a temperature of 10.degree. C.-200.degree. C.:(a) a 4-alkyl-2-morpholinone represented by the formula: ##STR1## in which R represents a monovalent aliphatic radical having from 1 to 10 carbon atoms, and(b) an alkylphenoxypoly
5203879 Fuel composition April 20, 1993
An amido alkanolamine composition obtained by reacting, at a temperature of 10.degree. C.-200.degree. C.:(a) a 4-alkyl-2-morpholinone represented by the formula: ##STR1## in which R represents a monovalent aliphatic radical having from 1 to 10 carbon atoms, and(b) a hydrocarbyl oxyp
5191143 Preparation of isobutylene March 2, 1993
A method for the preparation of isobutylene substantially free from tertiary butyl formate and peroxides from a tertiary butyl alcohol feedstock contaminated with tertiary butyl formate and peroxides wherein the feedstock is continuously brought into contact with a bed of a catalyst
5189118 Mixtures of 1-isopropyl-2-aryl imidazole and 1-isopropyl-2-aryl imidazoline as epoxy resin curat February 23, 1993
An epoxy resin curative composition that provides cured epoxy resins exhibiting improved properties is disclosed. The curative composition comprises a mixture of 1-isopropyl-2-aryl imidazole and 1-isopropyl-2-aryl imidazoline.
5183514 Process for dissolving or removing rigid polyurethane foam by contacting with 1,2-dimethyl imida February 2, 1993
A process for the dissolution of polyurethane foams is disclosed. A polyurethane foam may be dissolved, or removed from a substrate, by contacting the polyurethane foam with 1,2-dialkyl imidazole, alone or as a co-solvent.
5171819 Alkyl substituted piperazines as chain extenders in polyurea elastomer systems December 15, 1992
A polyurea elastomer is disclosed. The elastomer includes an isocyanate, an amine terminated polyoxyalkylene polyol, and a chain extender. The isocyanate is preferably a quasi-prepolymer of an isocyanate and a material selected from at least one polyol, a high molecular weight polyox
5153287 Preparation of hydroxylated low molecular weight polymodal butadiene polymers October 6, 1992
Hydroxy-containing, propylene carbonate insoluble butadiene polymers having an average molecular weight of about 400 to about 25,000 and containing an average of about 2 hydroxyl groups per molecule are prepared by polymerizing butadiene in a homogeneous reaction medium consisting es
5145563 Dehydration of propylene oxide by extracting distillation September 8, 1992
An extractive distillation agent consisting essentially of glycerol-1,3-di-t-butylether is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water to obtain an overhead distillate fraction consisting of essentially anhydrous propy
5140097 Thermoplastic thermosettable polyamide from poly(oxytetramethylene) diamine and poly(oxytetramet August 18, 1992
Polyamide reaction products comprising: a dicarboxylic acid and a diamine component comprising a mixture of poly(oxytetramethylene) diamines and oligomers of said poly(oxytetramethylene) diamines,said mixture containing from about 85 to about 99.5 wt. % of said poly(oxytetramethylene) di
5139706 Fatty amides prepared by reacting dicarboxylic acids, polyoxyalkylene amine bottoms products and August 18, 1992
Surfactant composition prepared by reacting dicarboxylic acids and esters thereof, such as adipic acid, diethyl oxalate, etc.; a polyoxyalkyleneamine residue, such as an alkylene glycol diamine bottoms product, and fatty acids and esters thereof, such as tallow acid or coconut acid,
5138097 Amine terminated polyamides August 11, 1992
Liquid amine terminated polyamide addition products having an average molecular weight of about 3,000 to about 10,000 are prepared by the non-catalytic reaction of a dicarboxylic acid having a molecular weight within the range of about 130 to about 700 with a higher molecular weight
5136035 Catalytic synthesis of alkyl morpholinones August 4, 1992
4-Alkyl-2-morpholinones are prepared by bringing an N-alkyldiethanolamine into contact with a zinc oxide promoted copper catalyst in the presence of hydrogen under reaction conditions including a temperature within the range of about 240.degree. to about 400.degree. C. and a pressure wit
5130382 Hydroxy terminated polyoxypropylene polyamides July 14, 1992
Hydroxy terminated polyamides are prepared having the formula: ##STR1## wherein R represents a defined hydrocarbon group,R' and R" represents defined oxypropylene groups, and R'" represents a defined oxyethylene group,the hydroxy terminated polyamide having been prepared by first prepari
5118785 Preparation of polyether amide from tetraethylene glycol diamine and terephthalic acid June 2, 1992
Polyether amides may be produced by reacting aromatic dicarboxylic acids with tetraethylene glycol diamine. This is surprising since aromatic dicarboxylic acids, such as terephthalic acid cannot be readily reacted with triethylene glycol diamine. Suitable dicarboxylic acids include t
5093458 4-methyl-2-morpholinone as a curative for epoxy resin compositions March 3, 1992
4-Methyl-2-morpholinone is an excellent catalytic curing agent for epoxy resins. The compound is also an accelerator when combined with standard epoxy resin curing agents.
5093455 N,N-dialkylenediamines as curing agents for blocked isocyanate coatings March 3, 1992
Disclosed is a coating composition with improved stability which comprises an isocyanate which has been chemically blocked and a curing agent comprising an N,N'-dialkylalkylenediamine.
5091585 Continuous preparatin of tertiary aliphatic methyl amines February 25, 1992
A method for continuous production of tertiary aliphatic methyl amines, particularly fatty aliphatic methyl amines such as di-hydrogenated tallow methyl amine from fatty alkyl amines, such as di-hydrogenated tallow amine over a nickel catalyst has been discovered. The reaction gives high
5091572 Amine terminated polyamides February 25, 1992
Liquid amine terminated polyamide addition products having an average molecular weight of about 3,000 to about 10,000 are prepared by the non-catalytic reaction of a dicarboxylic acid having a molecular weight within the range of about 130 to about 700 with a higher molecular weight
5086162 Polyether amide from polyalkylene glycol diamine and diacid mixture February 4, 1992
Novel polyether amides produced by reacting at least one polyalkylene glycol diamine with at least two dicarboxylic acids or esters thereof are described. The polyethylene glycol diamine has the formula NH.sub.2 --(CH.sub.2 CH.sub.2 O).sub.x --CH.sub.2 CH.sub.2 --NH.sub.2, where x ra
5086155 1-isopropyl-2-tolylimidazole as an epoxy resin curative February 4, 1992
Disclosed is an epoxy resin curative exhibiting extended pot life, lower reactivity and lower viscosity at ambient temperatures and increased reactivity at moderately elevated temperatures which comprises from 1 to 10 parts by weight of the ortho, meta or para form of 1-isopropyl-2-t
5082917 Piperazine derivatives as chain extenders in polyurea elastomer systems and method making same January 21, 1992
A polyurea elastomer is disclosed. The elastomer includes an isocyanate, an amine terminated polyoxyalkylene polyol, and a chain extender. The isocyanate is preferably a quasi-prepolymer of an isocyanate and a material selected from at least one polyol, a high molecular weight polyox
5072020 Aliphatic polyamines from polynitro compounds December 10, 1991
Disclosed is a novel route to diamines and triamines comprising reacting nitroalcohols with isocyanates to prepare di- and trinitro compounds which are subsequently reduced over a metal hydrogenation catalyst to the corresponding polyamino compound.
5066804 Preparation of alkyl morpholinones November 19, 1991
A 4-alkyl-2-morpholinone is prepared by reacting glyoxal with a C.sub.1 -C.sub.18 N-alkylmonoethanolamine in solution in a solvent that azeotropes with water at a temperature of about -10.degree. to 20.degree. C. for about 1 to 5 hours and by then heating the reaction mixture to a te
5053484 Polyether amide from mixture of polyether diamine October 1, 1991
Novel polyether amides are produced by reacting a polyethylene glycol diamine and a first dicarboxylic acid or an ester thereof, with a polyoxyalkylene diamine of molecular weight of at least 500 and a second dicarboxylic acid or an ester thereof, where the polyethylene glycol diamin
5041664 Continuous process for preparing quaternary ammonium salts August 20, 1991
Disclosed is a process for the continuous preparation of quaternary ammonium chlorides from tertiary amines and organic chlorides wherein the catalyst comprises a metal oxide having Lewis acid sites, said oxide containing elements of Group IIA, IIIA, IIIB, IVA and IVB of the Periodic
5030710 Nylon-6 modified with low molecular weight polyethylene glycol diamines July 9, 1991
Novel modified nylon-6 may be produced by using a combination of one or more dicarboxylic acids and triethylene glycol diamine and tetraethylene glycol diamine, but not a diethylene glycol diamine. A dicarboxylic acid/polyethylene glycol diamine salt may be reacted with .epsilon.-cap
5013812 Polybiurets May 7, 1991
Disclosed are polybiuret compositions prepared by the reaction of a polyoxyalkylene polyurea and a polyisocyanate. ##STR1## where R is H, CH.sub.3 or C.sub.2 H.sub.5 and R' is an organic radical. The reaction product of a polyoxyalkylene polyurea and polyisocyanates are prepared
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