Of Carboxylic Acid Ester Patents (Class 564/134)
  • Patent number: 5523485
    Abstract: A process for preparing high-purity isobutyramide which comprises reacting isobutyryl chloride in toluene or xylene at -15.degree. to 30.degree. C. with ammonia is described.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: June 4, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Lothar Janitschke, Ernst Buschmann
  • Patent number: 5492545
    Abstract: Additives which improve the low-temperature properties of distillate fuels are the reaction products of (1) diols, and (2) the product of pyromellitic dianhydride and combinations of two or more different aminoalcohols with long-chain hydrocarbyl groups attached.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: February 20, 1996
    Assignee: Mobil Oil Corporation
    Inventors: David J. Baillargeon, Angeline B. Cardis, Dale B. Heck
  • Patent number: 5464549
    Abstract: The dispersants are formed by reacting (a) at least one dispersant having at least one primary or secondary amino group and/or at least one hydroxyl group, with (b) at least one polyolefinic compound substituted at each terminal position by a succinic group. Suitable substances for use as reactant (b) include compounds derived from at least one telechelic compound having up to 5000 carbon atoms and at least two terminal methylene groups by reaction with maleic anhydride or the like. The products are deemed to be effective dispersant/detergents for use in fuels and lubricants. In fuels the products are deemed to exhibit the property of inhibiting and/or reducing deposit formation such as intake valve deposits. In crankcase lubricants, the products are deemed to provide desirable viscosity index improving properties.
    Type: Grant
    Filed: December 12, 1991
    Date of Patent: November 7, 1995
    Assignee: Ethyl Corporation
    Inventor: John F. Sieberth
  • Patent number: 5428116
    Abstract: New synthesis and analysis procedures for novel crosslinked polyamines and ampholytes. Polyamines are crosslinked with tartaric acid ester, malonic acid ester, or polycarboxylic acid esters of the citric acid cycle. The resulting crosslinked polyamine may further react with other compounds such as an .alpha.,.beta.-unsaturated or .alpha.-halo unsaturated carboxylic acids to prepare new ampholyte mixtures. The resulting novel ampholytes exhibit greater heterogeneity and complexity than presently prepared ampholytes, and can be used in analytical and preparative isoelectric focusing processes.Novel ampholyte analysis process entails analyzing chemical compounds, usually ampholytes, used in isoelectric focusing processes. The ampholyte is isoelectrically focused on an immobilized pH gradient, and then immersed in a picric acid solution to cause precipitation and visualization of amphoteric species.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: June 27, 1995
    Assignee: Board of Regents, The University of Texas System
    Inventors: L. Scott Rodkey, Philip R. DeShong
  • Patent number: 5336805
    Abstract: Process for preparing an a-amino acid having the general formula (1) of ##STR1## where R represents an aryl group or a substituted aryl, cycloalkyl or alkyl group, in which process glyoxylic acid, or a precursor or derivative thereof, is contacted in the presence of sulphamic acid with an unsaturated compound chosen from the group of aromatics, cycloalkenes and alkenes. By applying the process higher efficiencies are obtained.The acid obtained as reaction product can be esterified and amidated without prior isolation.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: August 9, 1994
    Assignee: DSM N.V.
    Inventors: Wilhelmus H. J. Boesten, Nicolaas A. de Heij
  • Patent number: 5334747
    Abstract: Malonic mono-ester mono-anilides and malonic acid mono-anilides and bis-anilides are produced by reaction of malonic acid di-alkyl esters with an aniline in the presence of a stoichiometric amount, based on the aniline, of an alkali alcoholate, accompanied by the initial formation of alkali salts of mono-ester mono-anilides or malonic-acid bis-anilides. Neutralization results in the formation of free malonic mono-ester mono-anilide or malonic-acid bis-anilide and saponification forms the malonic acid mono-anilide. Chloro-substituted anilides of cyclopropyl-1,1-dicarboxylic acid and their mono-esters are preferred.
    Type: Grant
    Filed: April 7, 1992
    Date of Patent: August 2, 1994
    Assignee: Huls Aktiengesellschaft
    Inventor: Klaus-Dieter Steffen
  • Patent number: 5241048
    Abstract: Chemical reactions are readily carried out using supercritical carbon dioxide as the reaction medium. Supercritical carbon dioxide is of special value as a reaction medium in reactions for synthesizing polypeptides, for sequencing polypeptides, or for amino acid analysis.
    Type: Grant
    Filed: November 6, 1990
    Date of Patent: August 31, 1993
    Assignee: Protein Technologies, Inc.
    Inventors: Leon E. Barstow, Glen D. Ward, Milan Bier
  • Patent number: 5239048
    Abstract: Block polyamido polyamine condensation products of an aromatic polycarboxylic acid component with a polyoxyalkylene polyamine component prepared by reacting the polycarboxylic acid component with an amount of the polyoxyalkylene polyamine component sufficient to react each carboxyl group with 1 mole of the polyoxyalkylene polyamine component.The polyoxyalkylene polyamine being selected from the group consisting of polyoxypropylene diamines, polyoxyethylene diamines, polyoxyethylene/oxypropylene diamines and polyoxypropylene triamines, and the aromatic polycarboxylic acid component being selected from the group consisting of C.sub.8 to C.sub.28 benzene dicarboxylic acids, benzene tricarboxylic acids, naphthalene carboxylates, hemimellitic acid, 1,1,3-trimethyl-3-phenylindan-4',5-dicarboxylic acid, trimellitic acid, and anhydrides and C.sub.1 to C.sub.4 alkyl esters thereof.
    Type: Grant
    Filed: May 4, 1990
    Date of Patent: August 24, 1993
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, Jiang-Jen Lin
  • Patent number: 5229442
    Abstract: Stabilizing compositions for organic polymers, composed of mixtures of at least one liquid phenolic antioxidant and at least one aminic antioxidant, subjected to thermal treatment, are characterized by their stabilizing capacity which is considerably higher than that of either single components or of corresponding untreated mixtures.These stabilizing compositions can be used in all field where the single components of the mixtures are generally used and, preferably, in the stabilization of organic polymers normally subject to deterioration due to oxidation processes.
    Type: Grant
    Filed: March 6, 1992
    Date of Patent: July 20, 1993
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Fabio Broussard, Carlo Busetto
  • Patent number: 5217634
    Abstract: A material useful as a dispersant additive in oleaginous compositions selected from fuels and lubricating oils comprising the reaction products of:(i) at least one intermediate adduct comprised of the reaction products of(a) at least one polyepoxide, and(b) at least one member selected from the group consisting of polyamines, polyols, and amino alcohols; and(ii) at least one of (a) hydrocarbyl substituted C.sub.3 -C.sub.10 monocarboxylic or C.sub.4 -C.sub.10 dicarboxylic acid producing material; (b) an aldehyde and a hydrocarbyl substituted hydroxy aromatic compound; or (c) an aldehyde and the reaction product of a hydrocarbyl substituted C.sub.3 -C.sub.10 monocarboxylic or C.sub.4 -C.sub.10 dicarboxylic acid or anhydride and an amine substituted hydroxy aromatic compound.Also included is a process for preparing said material and an oleaginous composition containing said material.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: June 8, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Jacob Emert, Antonio Gutierrez, Robert D. Lundberg
  • Patent number: 5180851
    Abstract: This invention relates to an improved process for the formation of N-(l-alkoxyalkyl)amides with coproduction of alkylidene bisamides. The N-(l-alkoxyalkyl)formamides of this invention are prepared by reacting formamide with an acetal or hemiacetal carboxylate ester represented by the formulas below in the presence of a solid acid ion exchange resin wherein the acid groups have been neutralized with an amine compound having a pKa (as the protonated amine in water) from about 4 to 9. The hemiacetal ester is represented by formula I and the acetal is represented by formula II. ##STR1## In the above formulas, R is C.sub.1 -C.sub.8 alkyl, aralkyl or aryl; R.sub.1 and R.sub.2 are C.sub.1 -C.sub.8 alkyl, or aryl; and R.sub.3 is secondary or tertiary alkyl having from 3-8 carbon atoms.
    Type: Grant
    Filed: March 21, 1991
    Date of Patent: January 19, 1993
    Assignee: Air Products and Chemicals Inc.
    Inventors: Mark L. Listemann, Robert K. Pinschmidt, Jr.
  • Patent number: 5156654
    Abstract: An additive for fuels and lubricating oils with detergent, dispersant and anti-rust properties is described, consisting essentially of the product of condensing a mixture of alkenylsuccinic acids or anhydrides of formula (I) ##STR1## where m and n, mutually independently, represent 0 or a whole number between 1 and 10 and are such that their sum is 9 or 10, and >R is >O or (--OH, --OH), with triethylenetetramine of formula (II)H.sub.2 N--(CH.sub.2 --CH.sub.2 --NH).sub.3 --H (II).
    Type: Grant
    Filed: April 10, 1990
    Date of Patent: October 20, 1992
    Assignee: AGIP Petroli S.p.A.
    Inventors: Paolo Koch, Fulvio Giavazzi
  • Patent number: 5128441
    Abstract: A block polyamido primary amine condensation product prepared by reacting a defined polyoxyalkylene polyamine having terminal primary amine groups with an amount of a defined dicarboxylic acid or an anhydride or a C.sub.1 to C.sub.4 alkyl ester thereof, sufficient to react one mole of the dicarboxylic acid reactant with each primary amine group of the polyoxyalkylene polyamine to thereby prepare an intermediate condensation reaction product containing terminal carboxyl groups, and reacting one mole of a defined organic di-primary amine with each terminal carboxyl group of the said intermediate condensation reaction product to thereby provide, as the principal product of the reaction a block polyamido primary amine condensation product.
    Type: Grant
    Filed: May 4, 1990
    Date of Patent: July 7, 1992
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, Jiang-Jen Lin
  • Patent number: 5117056
    Abstract: This invention relates to an improved process for the formation of N-(1-alkoxyalkyl)amides with coproduction of alkylidene bisamides. The N-(1-alkoxyalkyl)formamides of this invention are prepared by reacting formamide with an acetal or hemiacetal carboxylate ester represented by the formulas: ##STR1## wherein R is C.sub.1 -C.sub.8 alkyl, aralkyl or aryl; R.sub.1 and R.sub.2 are C.sub.1 -C.sub.8 alkyl, or aryl; and R.sub.3 is secondary or tertiary alkyl having from 3-8 carbon atoms.The reaction is carried out in the presence of an acid catalyst such as a strong acid ion exchange resin.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: May 26, 1992
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Mark L. Listemann, Robert K. Pinschmidt, Jr.
  • Patent number: 5101073
    Abstract: A method of preparing solid hydroxyalkylamides by reacting carboxylic alkyl esters with alkanolamines at controlled reaction temperatures, removing the alcohol byproduct, controlling the temperature of the reaction mixture to form a slurry, maintaining the slurry and recovering the solid hydroxyalkylamides.
    Type: Grant
    Filed: August 27, 1990
    Date of Patent: March 31, 1992
    Assignee: Rohm and Haas Company
    Inventor: Francis W. Schlaefer
  • Patent number: 5091572
    Abstract: 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 polyoxypropylene diamine having an average molecular weight within the range of about 1,500 to about 6,000 and with a lower molecular weight polyoxypropylene diamine having an average molecular weight within the range of about 200 to about 700, the reaction conditions including a temperature within the range of about 150.degree. to about 280.degree. C., a pressure of about 0.1 to 20 atmospheres and a reaction time of about 2 to about 5 hours.
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: February 25, 1992
    Assignee: Texaco Chemical Company
    Inventors: George P. Speranza, Wei-Yang Su
  • Patent number: 5082966
    Abstract: A compound of the formula ##STR1## in which R.sup.1 is an aralkyl group and R.sup.2 is COOR.sup.2 hydrogen or a monovalent organic group attached through a carbon atom and preferably is a hydrocarbon group, and n is one or two. Typically R.sup.2 is a lower alkyl group. The compound is prepared from the corresponding sulphide compound by oxidation, for example using hydrogen peroxide. The compound can be directly amidated to the corresponding amide which is a precursor for tri- and tetramethyleneisothiazolin-3-ones.
    Type: Grant
    Filed: September 13, 1990
    Date of Patent: January 21, 1992
    Assignee: Imperial Chemical Industries plc
    Inventor: Frank S. Moffatt
  • Patent number: 5068428
    Abstract: Cyclopropanecarboxamide can be prepared by reaction of a cyclopropanecarboxylic ester with NH.sub.3, in which the ester alcohol has 4-8 C atoms and can be straight-chain or branched and which process is carried out in the presence of catalytic amounts of an alkali metal alcoholate of a monohydric C.sub.1-C.sub.8 alcohol at 60.degree.-200.degree. C. in the absence of a hydrocarbon solvent.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: November 26, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Diehl, Heinz U. Blank, Edwin Ritzer
  • Patent number: 5039309
    Abstract: Additives comprising the reaction products of aminodiols and the product of pyromellitic dianhydride and aminoalcohols and/or amines with long-chain hydrocarbyl groups improve the low-temperature properties of distillate fuels.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: August 13, 1991
    Assignee: Mobil Oil Corporation
    Inventors: David J. Baillargeon, Angeline B. Cardis, Dale B. Heck
  • Patent number: 5039306
    Abstract: Additives which improve the low-temperature properties of distillate fuels are the reaction products of (1) diols, and (2) the product of pyromellitic dianhydride and aminoalcohols and/or amines with long-chain hydrocarbyl groups attached.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: August 13, 1991
    Assignee: Mobil Oil Corp.
    Inventors: David J. Baillargeon, Angeline B. Cardis, Dale B. Heck
  • Patent number: 5002589
    Abstract: Additives which improve the low-temperature properties of distillate fuels are the reaction products of (1) diaminodiols, and (2) the product of pyromellitic dianhydride and aminoalcohols and/or amines with long-chain hydrocarbyl groups attached.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: March 26, 1991
    Assignee: Mobil Oil Corp.
    Inventors: David J. Baillargeon, Angeline B. Cardis, Dale B. Heck
  • Patent number: 5002588
    Abstract: Additive reaction products of (1) hydrocarbyl diols, and (2) the product of benzophenone tetracarboxylic dianhydride and hydrocarbyl aminoalcohols and/or amines improve the low-temperature properties of distillate fuels when added thereto.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: March 26, 1991
    Assignee: Mobil Oil Corporation
    Inventors: David J. Baillargeon, Angeline B. Cardis, Dale B. Heck
  • Patent number: 5000758
    Abstract: Additives comprising the reaction products of aminodiols and the products of benzophenone tetracarboxylic dianhydride and aminoalcohols and/or amines with long-chain hydrocarbyl groups attached improve the low-temperature properties of distillate fuels.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: March 19, 1991
    Assignee: Mobil Oil Corp.
    Inventors: David J. Baillargeon, Angeline B. Cardis, Dale B. Heck
  • Patent number: 4992584
    Abstract: A process is disclosed for the preparation of .beta.-ketocarboximides of .alpha.,.beta.-unsaturated amides from 1,3-dioxin-4-ones and .alpha.,.beta.-unsaturated amides using an inert solvent system capable of maintaining both reactants substantially in homogeneous solution throughout the reaction. This process provides greatly improved yields of .alpha.,.beta.-ketocarboximides of .alpha.,.beta.-unsaturated amides as well as a simple method of recovering same since such products can readily be precipitated from the reaction mixture.
    Type: Grant
    Filed: August 12, 1988
    Date of Patent: February 12, 1991
    Assignee: Eastman Kodak Company
    Inventor: Robert J. Clemens
  • Patent number: 4973746
    Abstract: Scrap poly(ethyleneterephthalate) is converted to useful amine and diamine monomers such as para-xylylenediamine, 1,4-bis(aminomethyl)cyclohexane and 4-aminomethyl benzoic acid for the production of various polyamides. The conversion of poly(ethyleneterephthalate) to diamine monomers is achieved by a three step process involving (a) ammonolysis of the poly(ethyleneterephthalate) to produce terephthalamide and ethylene glycol; (b) pyrolytic dehydration of the terephthalamide to produce terephthalonitrile; and (c) hydrogenation of the terephthalonitrile to produce the para-xylylene diamine and/or 1,4-bis(aminomethyl)cyclohexane. The conversion of poly(ethyleneterephthalate) to 4-aminomethyl benzoic acid involves the steps of (a) ammonolysis of the poly(ethyleneterephthalate) to produce terephthalamide; (b) partial pyrolytic dehydration of said terephthalamide to produce 4-cyanobenzoic acid; and (c) hydrogenation of said 4-cyanobenzoic acid to produce 4-aminomethylbenzoic acid.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: November 27, 1990
    Assignee: General Electric Company
    Inventors: Kenneth P. Blackmon, Daniel W. Fox, Sheldon J. Shafer
  • Patent number: 4906394
    Abstract: C.sub.5 -C.sub.9 lactone based adduct materials are made by reacting a C.sub.5 -C.sub.9 lactone with a polyamine, a polyol or an amino alcohol to form a lactone adduct intermediate, and thereafter reacting the intermediate with an aliphatic hydrocarbyl saturated or unsaturated, straight chain or branched chain monocarboxylic or dicarboxylic acylating agent having from about one to about 165 total carbon atoms in said straight or branched chain to insure that the resulting lactone adduct is hydrocarbon soluble. The resulting adduct material are useful per se, as oil soluble dispersant additives, and are useful in fuel and lubricating oil compositions including concentrates containing the additives.
    Type: Grant
    Filed: October 7, 1986
    Date of Patent: March 6, 1990
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Antonio Gutierrez, Robert D. Lundberg
  • Patent number: 4851562
    Abstract: There is provided a new class of diamines of the formula ##STR1## wherein X=NH or O, and R represents a divalent, substituted or unsubstituted organic group having at the most 20 carbon atoms.The diamines, wherein X has the meaning of an O-atom, may be converted with diacids, diacid dichlorides, aromatic carboxylic acid anhydrides or diisocyanates into poly(esteraramid) amides, poly(esteraramid) imides, or poly(esteraramid) urea or, when X stands for an --NH--group, into poly(amidaramid) amides, poly(amidaramid) imides, or poly(amidaramid) urea.The wholly or largely aromatic polyamides, polyurea or polyimides are of an iterative structure.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: July 25, 1989
    Assignee: Akzo N.V.
    Inventors: Cornelis R. H. I. de Jonge, Gerrit Hoentjen, Eduard P. Magre
  • Patent number: 4814501
    Abstract: Pyrolysis of substituted salicylate O(N,N-dialkyl)thiocarbamates yielded the corresponding N,N-dialkyl-2-(methylthio)benzamide. Similarly, substituted 6-azasalicylate O(N,N-dialkyl)thiocarbamates yielded the corresponding N,N-dialkyl-2-(methylthio)-6-aza-benzamide.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: March 21, 1989
    Assignee: Merck & Co., Inc.
    Inventors: Bruce E. Witzel, Robert K. Baker, Philippe L. Durette, Robert A. Frankshun
  • Patent number: 4795832
    Abstract: N-octyl salicylic acid amide and N-decyl salicylic acid amide, a process for their production from salicylic acid methyl ester and a primary amine, and use of the amides in antimicrobial compositions.
    Type: Grant
    Filed: October 2, 1987
    Date of Patent: January 3, 1989
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Hans T. Leinen, Rudolf Lehmann, Hans-Juergen Klueppel
  • Patent number: 4744798
    Abstract: Benzophenone derivatives, e.g., benzophenone tetracarboxylic dianhydride, and esters or mixtures thereof when reacted with various hydrocarbyl amines provide additives that are highly useful as fuel detergents, intake valve and exhaust gas valve deposit reducers.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: May 17, 1988
    Assignee: Mobil Oil Corporation
    Inventor: Harry J. Andress
  • Patent number: 4719303
    Abstract: A method for the preparation of substituted and unsubstituted 2-[(1-carbamoyl-1,2-dimethyl-propyl) carbamoyl]-3-quinolinecarboxylic, nicotinic and benzoic acids.
    Type: Grant
    Filed: November 21, 1983
    Date of Patent: January 12, 1988
    Assignee: American Cyanamid Company
    Inventors: William H. Gastrock, Timothy F. Mason, Gregory P. Withers
  • Patent number: 4701527
    Abstract: A method of synthesizing with improved reaction kinetics and improved effective yields salicylamide compounds of the formula: ##STR1## wherein R.sub.1 is a substituent selected from the group consisting of --H, --COC.sub.n H.sub.2n+1 and --C.sub.n H.sub.2n+1 wherein n is an integer with a value of from 1 through to about 15, R.sub.2 is a substituent selected from the group consisting of --H, --CN, --NO.sub.2, --F, --Cl, --Br, --I, --CF.sub.3, --CBr.sub.3, --CCl.sub.3, --CI.sub.3 and R.sub.1 and R.sub.3 is an R.sub.2 substituted heterocyclic compound selected (e.g.) from the group consisting of furan, thiazole, benzothiazole and purine which comprises reacting a phenyl salicylate ester bearing an R.sub.1 substituent on the benzene ring of the salicylic acid portion thereof with an R.sub.2 substituted aniline or a heterocyclic amine NH.sub.2 --R.sub.
    Type: Grant
    Filed: November 20, 1984
    Date of Patent: October 20, 1987
    Assignee: Lever Brothers Company
    Inventors: Gerald S. Koermer, Eddie N. Gutierrez, Maryfrances Prorok
  • Patent number: 4675442
    Abstract: What is disclosed is a method for making an amide of acrylic acid or of methacrylic acid by the reaction of an alkyl ester of acrylic acid or of methacrylic acid with an amine at a temperature between 50.degree. C. and 180.degree. C., whereby the reaction with the amine is carried out in the presence of a catalytic amount of a compound of a metal of Group IVB of the periodic table of the elements or of a compound of lead, zinc, or tantalum.
    Type: Grant
    Filed: March 6, 1985
    Date of Patent: June 23, 1987
    Assignee: Rohm GmbH
    Inventors: Siegmund Besecke, Guenter Schroeder
  • Patent number: 4659826
    Abstract: A method of synthesizing and recovering with high yield and purity salicylamide compounds of the formula: ##STR1## wherein R.sub.1 is a substituent having the formula --COC.sub.n H.sub.2n+1 wherein n is an integer with a value of from 1 through to about 15, R.sub.2 is a substituent selected from the group consisting of --H, --NO.sub.2, --F, --Cl, --Br, --I, --CF.sub.3, --CBr.sub.3, --CCl.sub.3, --CI.sub.3 and R.sub.1 and R.sub.3 is an R.sub.2 substituted heterocyclic compound selected (e.g.) from the group consisting of furan, thiazole, benzothiazole and purine by:(a) reacting a phenyl salicylate ester bearing an R.sub.1 substituent on the benzene ring of the salicylic acid portion thereof with an R.sub.2 substituted aniline or a heterocyclic amine NH.sub.2 -R.sub.3, optionally in the presence of an inert solvent such as a halogenated or unhalogenated aromatic compound or a carbowax solvent, e.g.
    Type: Grant
    Filed: November 20, 1984
    Date of Patent: April 21, 1987
    Assignee: Lever Brothers Company
    Inventor: Joshua Schwarz
  • Patent number: 4629812
    Abstract: The invention relates to a method for the production of N,N'-bis-salicyloyl hydrazine by a catalytic reaction of salicylic-acid alkyl esters with hydrazine or salicylic-acid hydrazide and has the object to develop such a method in such a manner that not only an N,N'-bis-salicyloyl hydrazine with reduced eye irritation is obtained, but wherein the product is also produced with a high yield and purity. For this purpose, the invention provides that hydrazine or salicylic-acid hydrazide is heated with a 1-to-10 times excess of salicylic-acid alkyl ester in the presence of a halogenide, hydroxide or oxide of boron, aluminum or zinc to temperatures of up to 150.degree. C. The N,N'-bis-salicyloyl hydrazine prepared by the method according to the invention is suitable particularly as an additive to polymers for cable and wire insulation in power and communication engineering.
    Type: Grant
    Filed: August 18, 1981
    Date of Patent: December 16, 1986
    Assignee: Siemens Aktiengesellschaft
    Inventor: Wolfgang von Gentzkow
  • Patent number: 4622426
    Abstract: N,N'-bis(2-hydroxyethyl)oxamide is facilely prepared, e.g., in finely divided crystalline form, by reacting an alkyl oxalate with ethanolamine in an aqueous reaction medium.
    Type: Grant
    Filed: November 9, 1984
    Date of Patent: November 11, 1986
    Assignee: Rhone-Poulenc Specialites Chimiques
    Inventor: Michel Crochemore
  • Patent number: 4551549
    Abstract: 2- and 3-Nitroterephthalamic acids are prepared by ammonolysis of dialkyl nitroterephthalates. The terephthalamic acids are useful as intermediates in the preparation of difunctional compounds useful in the preparation of aromatic polyamides and polybenzimidazoles.
    Type: Grant
    Filed: April 18, 1983
    Date of Patent: November 5, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George N. Milford, Jr.
  • Patent number: 4550204
    Abstract: The invention relates to a method and apparatus for the manufacture of N,N'-bis-(aroyl)hydrazines from hydrazine and arylcarboxylic acid alkyl esters in the presence of catalysts. According to the invention, the reaction ingredients are reacted in a substantially stoichiometric mass ratio in an inert medium of low volatility which is liquid to wax-like under reaction conditions, in a suitable reactor equipped with a centrifugal disc and connected to a cycling, separating and draining-off system and a dispersion head to form a paste-like product. The paste-like compound can be used as a metal deactivator in polyolefin which is in direct contact with copper, for instance, in cable and wire insulation.
    Type: Grant
    Filed: March 10, 1983
    Date of Patent: October 29, 1985
    Assignee: Siemens Aktiengesellschaft
    Inventors: Wolfgang Von Gentzkow, Manfred Schmiedel, Reinhold Tussing
  • Patent number: 4492801
    Abstract: A one-step process for the preparation of N-substituted (meth)acrylamides from the reaction of a (meth)acrylate ester and an amine over a catalytic amount of a metal alkoxide catalyst is described. These catalysts, such as stannous dimethoxide, lead dimethoxide, zinc dimethoxide, copper dimethoxide and bismuth tributoxide give high selectivity to the N-substituted (meth)acrylamides and little selectivity of the Michael adduct propionate ester, which would predominate in the absence of these catalysts. Also, these catalysts are less costly than organo metal catalysts commonly used.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: January 8, 1985
    Assignee: Texaco Inc.
    Inventors: Edward E. McEntire, Kathy B. Sellstrom, Edward C. Y. Nieh, David R. Livingston
  • Patent number: 4418211
    Abstract: A process is disclosed for selectively making trans-cyclohexane-1,4-diisocyanate, trans-cyclohexane-1,4-diamine, a trans-cyclohexane-1,4-diurethane, a transcyclohexane-1,4-diurea and trans-cyclohexane-1,4-disulphonyl urea by reacting ammonia with a mixture of cis and trans cyclohexane-1,4-dicarboxylic acid, a lower alkyl ester, a glycol ester, an oligomeric ester or a polyester to make a solid trans-dicarboxylic acid diamide in a first step. The diamide is chlorinated to form trans-cyclohexane-1,4-dicarboxylic acid-bis-N-chloramide.
    Type: Grant
    Filed: December 11, 1980
    Date of Patent: November 29, 1983
    Assignee: Akzona Incorporated
    Inventors: Hans Zengel, Manfred Bergfeld
  • Patent number: 4379928
    Abstract: Alkyl amides have been synthesized from cyclic anhydrides, carboxyl acids and their esters by contacting them with an amine carbamic acid salt.
    Type: Grant
    Filed: March 4, 1981
    Date of Patent: April 12, 1983
    Assignee: Union Carbide Corporation
    Inventor: Spyros Theodoropulos
  • Patent number: 4326055
    Abstract: This invention is directed to 5,6,7,8-tetrahydro-naphthyl or indanyl stilbene derivatives which are useful as tumor inhibiting agents, in the treatment of neoplasms, dermatological conditions and rheumatic illnesses.
    Type: Grant
    Filed: December 15, 1978
    Date of Patent: April 20, 1982
    Assignee: Hoffmann-La Roche Inc.
    Inventor: Peter Loeliger
  • Patent number: 4322551
    Abstract: A process for the preparation of aromatic amide antioxidants from a simple aliphatic or aromatic ester and primary amine in the presence of a metal alkoxide and an alcohol. Unsaturated products produced using this process are sufficiently pure to use as comonomers in the preparation of elastomers.
    Type: Grant
    Filed: February 16, 1978
    Date of Patent: March 30, 1982
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Niranjan V. Shah
  • Patent number: 4311857
    Abstract: Described are D-(threo)-1-aryl-2-acylamido-3-fluoro-1-propanol esters and salts thereof, methods for their preparation, and methods for their use as antibacterial agents.
    Type: Grant
    Filed: April 4, 1980
    Date of Patent: January 19, 1982
    Assignee: Schering Corporation
    Inventor: Tattanahalli L. Nagabhushan
  • Patent number: 4272550
    Abstract: Omega-[4-(polyfluoro-2-hydroxy-2-propyl)-2,3,6-substituted-phenoxy and phenylthio]alkanoic acids and compounds related thereto having antihypertensive activity are preparable by reaction of the appropriate 2,3,6-substituted-4-(polyfluoro-2-hydroxy-2-propyl)phenol or thiophenol with an alkyl ester of a bromoalkanoic acid, followed by hydrolysis to the free acid.
    Type: Grant
    Filed: October 31, 1979
    Date of Patent: June 9, 1981
    Assignee: Schering Corporation
    Inventors: Bernard R. Neustadt, Elijah H. Gold