Polyhydroxy Patents (Class 568/680)
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Patent number: 4822926Abstract: A process for the recovery of a low concentration of ethylene oxide from an aqueous solution comprising salts, ethylene oxide and glycol which comprises the steps of:(1) passing the aqueous solution comprising salts and ethylene oxide through a hydrolyzing zone at elevated temperature and elevated pressure for a sufficient length of time to insure the conversion of at least the greater portion of the ethylene oxide to glycols to obtain a dilute aqueous glycol solution;(2) passing the dilute aqueous glycol solution through at least one flasher, wherein water is evaporated in the form of steam thereby producing at the bottom of the (last) flasher a solid-liquid two-phase slurry stream comprising salt-containing solids and a liquid phase comprising glycol, salt and water;(3) sending said slurry-containing stream coming out of the (last) flasher to a centrifuge and centrifuging such stream to produce a solid phase and a liquid phase; and(4) passing said centrifuged liquid phase to a flasher wherein glycols are seType: GrantFiled: February 29, 1988Date of Patent: April 18, 1989Assignee: Shell Oil CompanyInventor: Robert F. Dye
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Patent number: 4788345Abstract: Mixture of compounds of general formula: ##STR1## in which R denotes a saturated C.sub.10 -C.sub.12 hydrocarbon radical, or mixture of such radicals, and n has a mean statistical value from 2 to 15, and preferably from 3 to 12.These products are very well tolerated by the skin and the mucosa, and are advantageously used in cosmetic or pharmaceutical compositions.Type: GrantFiled: January 20, 1987Date of Patent: November 29, 1988Assignee: L'OrealInventors: Henri Sebag, Guy Vanlerberghe
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Patent number: 4762952Abstract: A perfluorosulphonic acid polymer suitable for use as a catalyst contains units of the formula:[(SO.sub.3).sub.w M(SO.sub.3 R).sub.z-w ] (I)whereinM is a multivalent metal cation,R is a C.sub.1 to C.sub.8 fluorinated alkyl group,z is the valency of M, andw is an integer having a value between 1 and z-1.Also use of a polymer of formula (I) wherein M is aluminum as a catalyst in the production of glycol ethers by the reaction of an alkylene oxide and an alcohol.Type: GrantFiled: March 10, 1987Date of Patent: August 9, 1988Assignee: BP Chemicals LimitedInventor: Michael J. Green
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Patent number: 4677232Abstract: Process for the preparation of water-soluble or water-dispersible polyglycerolated nonionic surface-active agents.This process is characterized by the polyaddition of glycerol chlorohydrin and of a strong base, and preferably sodium or potassium hydroxide in an aqueous solution, to a (poly)hydroxylated compound.This process has the advantage of replacing glycidol, which is usually employed, by glycerol chlorohydrin, which is less costly, easier to store than glycidol, and also of avoiding the flash distillation of a flammable volatile solvent.Type: GrantFiled: December 13, 1985Date of Patent: June 30, 1987Assignee: L'OrealInventors: Henri Sebag, Guy Vanlerberghe
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Patent number: 4647688Abstract: Fatty ethers are provided which are lower alkyl ethers cyano-substituted lower alkyl ethers, ester ethers or amide ethers of fatty alcohols substituted with at least one of the following substituents: formyl, methylol, or acryloxymethyl. The substituted fatty ethers are useful as monomers in a wide variety of polymer systems.Type: GrantFiled: February 28, 1985Date of Patent: March 3, 1987Assignee: Henkel CorporationInventors: Michael J. Virnig, James P. Clark, Kenneth D. MacKay
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Patent number: 4642391Abstract: The present invention describes the production of high molecular weight polyhydric alcohols and their derivatives. In particular the urethane reaction products of polyisocyanates and polyhydric alcohols are described.Type: GrantFiled: May 20, 1983Date of Patent: February 10, 1987Assignee: Henkel CorporationInventor: Edgar R. Rogier
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Patent number: 4634719Abstract: .alpha.-mono(methyl-branched alkyl) glyceryl ethers represented by the formula ##STR1## where m is an integer of 2 to 14, n is an integer of 3 to 11, and the total of m+n is 11 to 17, are disclosed along with skin care compositions containing the same as emulsifiers.Type: GrantFiled: May 12, 1982Date of Patent: January 6, 1987Assignee: Kao Soap Co., Ltd.Inventors: Naotake Takaishi, Kouichi Urata, Yoshiaki Inamoto, Hisao Tsutsumi, Junichi Kawano
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Patent number: 4616097Abstract: This invention relates to the manufacture of ethylene glycol and more particularly to a low pressure process for making ethylene glycol comprising reacting synthesis gas, i.e. a mixture of carbon monoxide and hydrogen, plus formaldehyde in the presence of a homogenous liquid catalyst containing an effective amount of cobalt-containing compound and a silicon-containing promoter at a temperature of at least 50.degree. C. and a pressure of at least 500 psi.Type: GrantFiled: October 22, 1984Date of Patent: October 7, 1986Assignee: Texaco Inc.Inventor: John F. Knifton
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Patent number: 4609768Abstract: This invention relates to the manufacture of ethylene glycol and more particularly to a low pressure process for making ethylene glycol comprising reacting synthesis gas, i.e. a mixture of carbon monoxide and hydrogen, plus 1,3-dioxolane in the presence of a homogenous liquid catalyst containing an effective amount of cobalt-containing compound, a silane or germane-containing promoter dispersed in a dioxolane solvent at a temperature of at least 50.degree. C. and a pressure of at least 500 psi.Type: GrantFiled: October 22, 1984Date of Patent: September 2, 1986Assignee: Texaco Inc.Inventors: John F. Knifton, Jiang-Jen Lin, Neal J. Grice
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Patent number: 4584321Abstract: 3-(3-Hydroxybutoxy)-1-butanol having formula II and its stereoisomers and optical isomers, at the pure state, are described ##STR1## Processes for the purification of II and for the preparation of a pure diastereoisomer of II are described. Pharmaceutical compositions containing as the active ingredient compound II alone or combined with the isomeric ethers 4-(3-hydroxybutoxy)-2-butanol I and 3-(3-hydroxy-1-methylpropoxy)-1-butanol III.Type: GrantFiled: April 23, 1984Date of Patent: April 22, 1986Assignee: Istituto Luso Farmaco d'Italia S.p.A.Inventors: Elso Manghisi, Aldo Salimbeni
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Patent number: 4576967Abstract: Triglycerine monoalkyl ethers of the general formula (I), which are novel polyol ether compounds, ##STR1## in which R represents a saturated or unsaturated, linear or branched fatty hydrocarbon group having from 8 to 24 carbon atoms.The ethers (I) of the present invention are prepared from firstly subjecting 1,3-bis-o-(2,3-o-isopropylideneglyceryl)glycerine (II) and an etherifying agent (IV) to Williamson's ether synthesis reaction, and the resulting 1,3-bis-o-(2,3-o-isopropylideneglyceryl)-2-o-alkylglycerine (III) is subsequently subjected to hydrolysis.The ethers according to the invention are chemically stable because no linkages susceptible to decomposition, e.g. ester bond, are contained in the molecular structure of the ethers. Moreover, the ethers give a reduced degree of stimulus to the skin and have the surface activity, so that they are useful as an emulsifier, oil (emolient), humectant, thickener and particularly as a component of cosmetics.Type: GrantFiled: July 16, 1984Date of Patent: March 18, 1986Assignee: KAO CorporationInventors: Koichi Urata, Naotake Takaishi, Yuji Suzuki
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Patent number: 4568780Abstract: This invention relates to the manufacture of ethylene glycol and more particularly to a low pressure process for making ethylene glycol comprising reacting synthesis gas, i.e. a mixture of carbon monoxide and hydrogen, plus 1,3-dioxolane in the presence of a homogenous liquid catalyst containing an effective amount of cobalt-containing compound and a silane or germane-containing promoter dispersed in a hydrocarbon solvent at a temperature of at least 50.degree. C. and a pressure of at least 500 psi, where the particular solvents used allow the desired product to be separated from the reaction mixture by phase separation.Type: GrantFiled: October 22, 1984Date of Patent: February 4, 1986Assignee: Texaco Inc.Inventor: John F. Knifton
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Patent number: 4568774Abstract: Catalysts producing a sharply peaked alkoxylation distribution during the alkoxylation of organic materials comprise mixtures of BF.sub.3 and metal alkyls or metal alkoxides, SiF.sub.4 and metal alkyls or metal alkoxides, or mixtures of these catalysts.Type: GrantFiled: October 1, 1984Date of Patent: February 4, 1986Assignee: Vista Chemical CompanyInventor: Kang Yang
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Patent number: 4565896Abstract: This invention relates to the manufacture of ethylene glcyol and more particularly to a low pressure process for making ethylene glycol comprising reacting synthesis gas, i.e. a mixture of carbon monoxide and hydrogen, plus formaldehyde in the presence of a homogeneous liquid catalyst containing an effective amount of cobalt-containing compound and a silicon or germanium-containing promoter and a solvent at a temperature of at least 50.degree. C. and a pressure of at least 500 psi wherein said ethylene glycol product separates as a separate liquid phase from the solvent.Type: GrantFiled: October 22, 1984Date of Patent: January 21, 1986Assignee: Texaco Inc.Inventors: John F. Knifton, Roger G. Duranleau
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Patent number: 4551561Abstract: The novel process for the preparation of polyglycerols is based on the condensation of glycerol at a temperature of 190.degree. to 250.degree. C. in the presence of catalysts, the water of condensation being removed. Catalysts which are used are particular compounds containing phosphorus and an alkali metal, such that 0.005 to 1% by weight, based on the weight of glycerol, of phosphorus is present and the molar ratio of alkali metal:phosphorus is 1 to 12:1.Type: GrantFiled: December 19, 1984Date of Patent: November 5, 1985Assignee: Hoechst AktiengesellschaftInventor: Herbert Stuhler
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Patent number: 4543258Abstract: Disclosed is a polyol ether compound represented by the general formula (I): ##STR1## in which R represents a saturated or unsaturated, straight-chain or branched aliphatic hydrocarbon group having 8 to 24 carbon atoms, and R' represents a saturated or unsaturated, straight-chain or branched hydrocarbon group having 1 to 24 carbon atoms.A preparation process of the compound (I) is also disclosed.Compounds according to the invention show excellent emulsification stability and are suitable to be a cosmetic composition.Type: GrantFiled: November 1, 1983Date of Patent: September 24, 1985Assignee: Kao CorporationInventors: Koichi Urata, Naotake Takaishi, Yoshiaki Inamoto, Yuji Suzuki
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Patent number: 4540828Abstract: Catalysts and a method of using said catalysts for the alkoxylation of a variety of materials is disclosed. Catalysts so described produce alkoxylates having a very sharp alkoxylate distribution. The catalysts are supported and unsupported dialkoxy and dialkyl metal fluorides and halides and alkyl metal difluorides and dihalides.Type: GrantFiled: February 25, 1983Date of Patent: September 10, 1985Assignee: Vista Chemical CompanyInventor: Kang Yang
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Patent number: 4535189Abstract: The filter cake formed by the filtering of a alkylene oxide polymer during the refining of the same contains a minor amount of alkylene oxide polymer which can be recovered therefrom by treating the filter cake with a lower aliphatic alcohol or an aqueous solution of lower aliphatic alcohol. Methanol is the preferred lower aliphatic alcohol.Type: GrantFiled: March 21, 1984Date of Patent: August 13, 1985Assignee: Texaco Inc.Inventor: Michael Cuscurida
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Patent number: 4521634Abstract: Described are ether carbinols defined according to the generic structure: ##STR1## wherein X.sub.1 represents a moiety selected from the group consisting of: ##STR2## and wherein Y.sub.1 represents C.sub.4 or C.sub.5 alkylene or C.sub.4 or C.sub.5 alkenylene or C.sub.4 or C.sub.5 alkynylene; processes for preparing such ether carbinols by means of first reacting allyl ethers with a mixture of carbon monoxide and hydrogen by means of an oxoreaction to produce ether carboxaldehydes and then reducing the thus formed ether carboxaldehydes to ether carbinols; or reacting camphene with appropriate diols; as well as methods for augmenting or enhancing the aroma or taste of consumable materials including perfumes, colognes and perfumed articles; foodstuffs, chewing gums, chewing tobaccos, medicinal products and toothpastes; and smoking tobaccos and smoking tobacco articles by adding thereto an aroma or taste augmenting or enhancing quantity of the thus produced ether carbinols.Type: GrantFiled: January 26, 1984Date of Patent: June 4, 1985Assignee: International Flavors & Fragrances Inc.Inventors: Futoshi Fujioka, Richard M. Boden, William L. Schreiber
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Patent number: 4501840Abstract: Pentaerythritol is treated at a temperature of about 180.degree. to 220.degree. C. with a strongly alkaline acting material, e.g. calcium oxide. The thus treated pentaerythritol serves as a costabilizer e.g., with the salt of a polyvalent metal and a carboxylic acid, for a vinyl chloride resin, e.g. polyvinyl chloride and has outstanding properties as such.Type: GrantFiled: October 20, 1983Date of Patent: February 26, 1985Assignee: Degussa AktiengesellschaftInventors: Peter Werle, Wolfgang Merk
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Patent number: 4480139Abstract: Linear aldehydes having 7-21 carbon atoms are separated from mixtures (which may contain alcohols and/or branched aldehydes) by converting them into solid adducts with C.sub.2 to C.sub.12 linear alkane diols. The adducts are then separated and decomposed. The adducts are themselves novel compounds.Type: GrantFiled: April 7, 1983Date of Patent: October 30, 1984Assignee: Imperial Chemical Industries PLCInventors: Norman Scott, Paul Hepworth
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Patent number: 4443593Abstract: Waste or surplus polycarbonates are salvaged by reacting them with a hydroxy amine in an amount sufficient to cleave about 85% or more of the carbonate groups, thereby converting the polymer to a mixture of dihydroxy monomers--including novel dihydroxy carbamates--which may be converted to useful polymers by reaction with other difunctional monomers having at least one hydroxy-reactive functional group per molecule.Type: GrantFiled: June 25, 1982Date of Patent: April 17, 1984Assignee: The Dow Chemical CompanyInventor: Guy R. Collins
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Patent number: 4430237Abstract: A detergent composition consisting essentially of a water soluble mixture of higher alkyl glyceryl ether nonionic surfactants having the structural formula ##STR1## where R is a C.sub.8 -C.sub.16 alkyl radical, and n has a value of 1, 2 and 3, with an n distribution of 12-49% n=1 ethers, 24-61% n=2 ethers and 6-59% n=3 ethers.Type: GrantFiled: October 16, 1981Date of Patent: February 7, 1984Assignee: Colgate-Palmolive Co.Inventors: Robert C. Pierce, Frank J. Bala, Jr.
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Patent number: 4404408Abstract: Metal or metalloid salts, ansolvo-acids and proton-acids can be so complexed with 1,2,3-triols, glycerol ethers or glycerol thioethers containing at least 6 C atoms in the molecule that they are in the form of compositions which are soluble in organic solvents, especially non-polar, aprotic solvents, such as hydrocarbons. These stable compositions display an outstanding anti-static action and, because of their spectrum of properties, are especially suitable for imparting anti-static characteristics to polymers, lubricants, fuels and also solvents based on hydrocarbons.Type: GrantFiled: September 7, 1977Date of Patent: September 13, 1983Assignee: Ciba-Geigy CorporationInventors: Hermann O. Wirth, Hans-Helmut Friedrich
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Patent number: 4400560Abstract: A process for preparing a mixture of polyhydroxyl compounds having low molecular weight by catalytically hydrogenating a formose mixture with hydrogen on a metal catalyst. The hydrogenation is carried out at a pH of 7.5 to 12.5 and at elevated temperature and pressure. The formose mixture comprises (i) up to 70 wt. % formose, (ii) up to 1.6 wt. % lead ions and (iii) up to 5 wt. % calcium ions with at least one of (ii) or (iii) being present. The catalyst which is present in an amount of 4-240 wt. % (based on formose solution) is a compound taken from the group consisting of nickel, cobalt and compounds thereof. The mixture of polyhydroxyl compounds made in accordance with the present invention is useful as a starting material in the production of polyether polyols, polyester polyols and polyurethane plastics.Type: GrantFiled: March 9, 1981Date of Patent: August 23, 1983Assignee: Bayer AktiengesellschaftInventors: Roland Richter, Hanns P. Muller, Kuno Wagner, Rudolf Helm, Jurgen Zander
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Patent number: 4396780Abstract: The proposed method resides in that alkylene oxide is subjected to interaon with a polyhydric alcohol in a multisectional reaction zone. A monomer and a polyhydric alcohol are introduced into the first section of the reaction zone, the polyhydric alcohol containing a catalyst in the form of a solution of an alkali metal alcoholate with an alkaline content of 1-20 wt. % as calculated for KOH and with a water content in the solution from 0.05 to 0.5 wt. %. The reaction is conducted in such a way that the initial components interact in the first section at a molar ratio of 1-5:1.The proposed method makes it possible to produce polyethers that are uniform with respect to the chemical composition (molecular-weight distribution and distribution according to the types of the functionality) and with minimum impurity content.Type: GrantFiled: October 2, 1980Date of Patent: August 2, 1983Assignees: Vsesojuzny Nauchno-Issledovatelsky Institute Sinteticheskikh Smol, VEB Synthesewerk SchwarzheideInventors: Vladimir S. Shtykh, Alexandr A. Evstratov, Vladimir S. Lebedev, Gleb A. Gladkovsky, Viktor S. Kopenin, Ljudmila P. Gladush, Nikolai V. Kia-Oglu, Mark I. Prigozhin, Jury V. Sharikov, Jury F. Petrov, Wolf-Dieter Habicher
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Patent number: 4390440Abstract: In accordance with the instant invention, a water-based hydraulic fluid, having improved viscosity can be obtained by blending a carboxylic acid with a thickened hydraulic fluid composition employing a thickener obtained by modifying a conventional polyether polyol thickening agent with an alpha-olefin epoxide or glycidyl ether having about 10 to 24 carbon atoms or mixtures thereof. Small amounts of higher molecular weight glycols may also be incorporated into the chain.Type: GrantFiled: June 8, 1981Date of Patent: June 28, 1983Assignee: BASF Wyandotte CorporationInventors: Ellen S. Schwartz, Cline A. Tichner
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Patent number: 4360698Abstract: A process to form glycol ethers by reacting an organic compound (A) having at least one aliphatic hydroxyl group with an oxirane compound (B) under reaction conditions in the presence of a catalytic amount of a polymeric material that is substantially insoluble in the reaction mixture, said polymeric material having a plurality of pendant sulfonate moieties with divalent metal counterions. Preferential formation of the mono adduct of glycol ethers is noted.Type: GrantFiled: July 22, 1981Date of Patent: November 23, 1982Assignee: The Dow Chemical CompanyInventor: James H. Sedon
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Patent number: 4307256Abstract: A process for the preparation of alkylene glycols starting from the corresponding alkylene oxide, which is reacted with water in the presence of carbon dioxide, wherein the reaction catalyst is selected amongst the organic bases, preferably a tertiary amine, whereby the conversion rate and the selectivity are improved.Type: GrantFiled: April 8, 1976Date of Patent: December 22, 1981Assignee: Anic S.p.A.Inventors: Gioacchino Cipriani, Carlo Neri, Ugo Romano
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Patent number: 4298758Abstract: Propylene glycol and dipropylene glycol diesters are prepared by reacting dichloropropyl ethers with a carboxylic acid salt, e.g., sodium acetate, and the corresponding carboxlyic acid, e.g., acetic acid. The by-product sodium chloride is insoluble in the acetic acid and easily separated from the reaction mixture. The diesters can be hydrolyzed to their respective glycols.Type: GrantFiled: February 11, 1980Date of Patent: November 3, 1981Assignee: The Dow Chemical CompanyInventors: Frank T. Cook, Donald G. Prier
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Patent number: 4298764Abstract: This invention relates to a process for preparing nonionic glycidol-derived surfactants. Specifically C.sub.10 -C.sub.20 n-alkyl glyceryl ether alcohols containing from 1 to about 10 glyceryl units, are prepared by reacting crude glycidol and a C.sub.10 -C.sub.20 n-alkyl alcohol in the presence of a non-polar, non-reactive miscible solvent.Type: GrantFiled: March 21, 1980Date of Patent: November 3, 1981Assignee: FMC CorporationInventor: Sidney Berkowitz
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Patent number: 4247654Abstract: The invention is directed to a process for the production of polyether polyols having an average molecular weight of from 200 to 10,000 and an average hydroxyl functionality of from 2.0 to 7.0, comprising reacting one or more alkylene oxides, optionally successively, with a mixture of polyhydric alcohols which has been produced by reduction of the condensation products from the condensation of formaldehyde hydrate. The invention is also directed to the process for the production of polyether polyols characterized in that the mixture of polyhydric alcohols is mixed with dihydric and/or trihydric alcohols and/or monoamines or polyamines prior to alkoxylation. Finally, the invention is directed to the use of the alkoxylated mixtures as the isocyanate-reactive component in the production of optionally cellular polyurethane plastics.Type: GrantFiled: February 26, 1979Date of Patent: January 27, 1981Assignee: Bayer AktiengesellschaftInventor: Kuno Wagner
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Patent number: 4245125Abstract: Compounds of the formula IA.multidot.m B (I)whereinA is a compound of the formula II or III ##STR1## m is a rational number between 0.1 and 4.0, and B is H.sub.2 O.sub.2, N.sub.2 H.sub.4 or NH.sub.2 OH, andR.sub.1 is an unsubstituted or substituted aliphatic or aromatic hydrocarbon radical which has 3-30 C atoms and which can be interrupted by oxygen or sulfur atoms,R.sub.2 is hydrogen or C.sub.1 -C.sub.30 alkyl,X is --O-- or --SO.sub.2 -- and, in the case where B is N.sub.2 H.sub.4 or NH.sub.2 OH, also --S-- or --SO--,Y is the direct bond, ##STR2## Q is --CH.sub.2, --CH(OH)--CH.sub.2 -- or --CH(CH.sub.2 --OH)--, and n is 1, 2, 3, 4, 5, 6, 7 or 8.Type: GrantFiled: May 10, 1979Date of Patent: January 13, 1981Assignee: Ciba-Geigy CorporationInventors: Hermann O. Wirth, Hans-Helmut Friedrich
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Patent number: 4234444Abstract: This invention relates to a detergent composition comprising:(a) from about 40 to 60% by weight of compounds of formulaR.sup.1 --O--(CH.sub.2 CH.sub.2 O).sub.n --H (I)wherein R.sup.1 represents a saturated or unsaturated aliphatic radical of a fatty alcohol having from about 6 to 18 carbon atoms, and n is an integer of from 4 to 15; and(b) from about 60 to 40% by weight of compounds of formula ##STR1## wherein R.sup.2 and R.sup.3 each independently represent an alkyl radical having from about 1 to 17 carbon atoms, the total number of carbon atoms in R.sup.2 and R.sup.3 being from about 8 to 18, and p and q each independently represent a number from 0 to 15, the sum of p and q being from about 4 to 15.Type: GrantFiled: June 25, 1979Date of Patent: November 18, 1980Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Ingo Wegener, Johann Glasl, Achim Werdehausen
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Patent number: 4228310Abstract: Covers a method of preparing polyether polyols useful in making a polyisocyanurate polymer by oxyalkylating an alcohol by the catalytic addition of an alkylene oxide to said alcohol in presence of a catalyst selected from the group consisting of carbamate salts, aminophenols, hexahydro-s-triazines and tetrahydrooxadiazines.Type: GrantFiled: March 19, 1979Date of Patent: October 14, 1980Assignee: Texaco Development Corp.Inventors: George P. Speranza, Robert L. Zimmerman, Thomas H. Austin
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Patent number: 4217296Abstract: Novel sulfate salts of C.sub.10 -C.sub.20 linear alkyl glyceryl ether alcohols, useful as biodegradable surfactants in detergent compositions, are prepared by reacting a stoichiometric excess of C.sub.10 -C.sub.20 linear alkyl alcohol with glycidol predissolved in hexyl acetate, to selectively produce C.sub.10 -C.sub.20 linear alkyl glyceryl ether alcohols containing 1-3 glyceryl units, sulfating said ether alcohols, and neutralizing the sulfates with base.Type: GrantFiled: November 13, 1978Date of Patent: August 12, 1980Assignee: FMC CorporationInventor: Sidney Berkowitz
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Patent number: 4211796Abstract: A composition for limiting feed supplement intake for cattle is disclosed which comprises at least one member of a group of compounds having the formula: ##STR1## wherein A is a hydroxyl or RB is a halogen or hydroxyl or RC is a halogen, or C is a hydroxyl in the event thatB is a halogen or C is a hydroxyl if B is also a hydroxyland A is Rwherein ##STR2## and preferably wherein R.sup.1 is a C.sub.9 -C.sub.Type: GrantFiled: November 9, 1977Date of Patent: July 8, 1980Assignee: Ralston Purina CompanyInventors: Kent J. Lanter, Norman L. Betz, Danny L. Williams
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Patent number: 4163865Abstract: An improvement in a process for the preparation of a pinacol of the formula ##STR1## wherein R.sup.1 and R.sup.2 are identical or different and represent optionally substituted aliphatic, cycloaliphatic, araliphatic or an aromatic hydrocarbon radical by reducing a ketone of the formula ##STR2## wherein R.sup.1 and R.sup.2 have the abovementioned meanings with a base metal, the improvement comprising carrying out the reduction in the presence of an organic halogen compound and in the presence of a phosphoric acid amide, phosphoric acid ester and/or carboxylic acid amide.Type: GrantFiled: April 3, 1978Date of Patent: August 7, 1979Assignee: Bayer AktiengesellschaftInventors: Heinrich Wolfers, Hans Rudolph, Hans-Jurgen Rosenkranz