Abstract: A tert-amine which contains an acid-activated color body precursor is treated to prevent it or a derivative thereof, e.g., an amine oxide, betaine, or quaternary ammonium compound, from turning pink when exposed to acidic conditions by contacting it with an amido compound containing a --CO.NH-- group.
Type:
Grant
Filed:
March 18, 1991
Date of Patent:
June 2, 1992
Assignee:
Ethyl Corporation
Inventors:
Kim R. Smith, James E. Borland, Joe D. Sauer
Abstract: A tert-amine which contains an acid-activated color body precursor is treated to prevent it or a derivative thereof, e.g., an amine oxide, betaine, or quaternary ammonium compound, from turning pink when exposed to acidic conditions by contacting it with an inorganic sulfite selected from alkali metal sulfites and bisulfites, preferably sodium sulfite, at a temperature above 100.degree. C.
Type:
Grant
Filed:
March 18, 1991
Date of Patent:
May 12, 1992
Assignee:
Ethyl Corporation
Inventors:
Kim R. Smith, James E. Borland, Joe D. Sauer
Abstract: A tert-amine which contains an acid-activated color body precursor is treated to prevent it or a derivative thereof, e.g., an amine oxide, betaine, or quaternary ammonium compound, from turning pink when exposed to acidic conditions by contacting it with an alkanal containing at least two carbons.
Type:
Grant
Filed:
March 18, 1991
Date of Patent:
April 21, 1992
Assignee:
Ethyl Corporation
Inventors:
James E. Borland, Joe D. Sauer, Kim R. Smith
Abstract: A tert-amine which contains an acid-activated color body precursor is treated to prevent it or a derivative thereof, e.g., an amine oxide, betaine, or quaternary ammonium compound, from turning pink when exposed to acidic conditions by contacting it with an acetylalkylcarbinol.
Type:
Grant
Filed:
March 18, 1991
Date of Patent:
April 7, 1992
Assignee:
Ethyl Corporation
Inventors:
Joe D. Sauer, Kim R. Smith, James E. Borland
Abstract: A tert-amine which contains an acid-activated color body precursor is treated to prevent it or a derivative thereof, e.g., an amine oxide, betaine, or quaternary ammonium compound, from turning pink when exposed to acidic conditions by contacting it with a dialkylacetal.
Type:
Grant
Filed:
March 18, 1991
Date of Patent:
April 7, 1992
Assignee:
Ethyl Corporation
Inventors:
Joe D. Sauer, Kim R. Smith, James E. Borland
Abstract: Water soluble biocidal water treatment perhalides of the formula: ##STR1## where R.sub.1 and R.sub.2 are independently hydrogen, hydroxyethyl, alkyl, cyclic alkyl, (alpha, omega)-alkyl, alkyl ether, polyether, heterocyclic ring-substituted alkyl, and halogenated alkyl; X is chlorine, bromine or iodine; and only one of R.sub.1 and R.sub.2 may be hydrogen.
Abstract: Solutions of urea peroxide in glycerine suitable for use as ear wax removal aid formulations, which solutions have been stabilized by the addition of succinic anhydride thereto.
Abstract: A method of stabilizing a composition comprising a chlorofluoroalkane and an amine or amine-based polyol comprising incorporating into said composition an effective stabilization promoting amount of at least one but-3-en-1-ol compound and compositions comprising at least one chlorofluoroalkane and a stabilization promoting but-3-en-1-ol.
Type:
Grant
Filed:
September 8, 1988
Date of Patent:
November 28, 1989
Assignee:
Kali-Chemie Aktiengesellschaft
Inventors:
Manfred Boedecker, Thomas Benecke, Werner Krucke, Willi Baumeister
Abstract: Process for the improvement of the quality of polyalkylene polyamines prepared by the reaction of (i) ammonia and/or an alkyleneamine compound having at least two amino groups and an alkanolamine compound having at least one amino group in the presence of a catalytically effective amount of a metal acid phosphate and at a temperature and pressure sufficient to form the polyalkylene polyamine.
Abstract: The present invention relates to a process for the reduction of the color of polyamines by reacting at elevated temperature, i.e. 50.degree. to 175.degree. C., and pressure, i.e. 50 to 1500 psig, such colored polyamines, e.g. triethylenetetramine or tetraethylenepentamine, in the presence of a hydrogenation catalyst, e.g. Raney nickel or palladium on carbon, and a hydrogen atmosphere for a period of time sufficient to effectuate the desired reduction in color. In the process of the present invention, the polyamines can either be distilled into a narrow product composition and then hydrogenated or a crude polyamine product can be hydrogenated and then distilled to produce the desired product composition.
Type:
Grant
Filed:
September 26, 1986
Date of Patent:
August 23, 1988
Assignee:
Air Products and Chemicals, Inc.
Inventors:
Michael E. Ford, Thomas A. Johnson, Gamini A. Vedage
Abstract: Bis(substituted thioalkyl)hydroxylamine derivatives are effective in stabilizing polyolefin compositions containing a stabilizer or mixture of stabilizers selected from the group consisting of the phenolic antioxidants, the hindered amine light stabilizers, the alkylated hydroxybenzoate light stabilizers, the ultraviolet light absorbers, the organic phosphorus compounds, the alkaline metal salts of fatty acids and the thiosynergists, against degradation upon high temperature extrusion, exposure to the combustion products of natural gas, gamma irradiation or upon storage for extended periods.
Type:
Grant
Filed:
April 29, 1985
Date of Patent:
September 16, 1986
Assignee:
Ciba-Geigy Corporation
Inventors:
Ramanathan Ravichandran, John D. Spivack
Abstract: Color formation in aliphatic amines during storage is prevented by contacting the amines before they develop objectionable color with ethylenediamine tetraacetic acid, salts or ethylenediamine tetraacetic acid, nitrilotris acetic acid, salts of nitrilotris acetic acid, nitrilotris methylenephosphonic acid, salts of nitrilotris methylenephosphonic acid, 8-hydroxy-quinoline or mixtures of the above compounds.
Abstract: The present invention provides a nonpyrophoric and thermally stable form of lithium diisopropylamide which is useful as a reagent in the preparation of pharmaceuticals and specialty chemicals. The preferred composition includes lithium diisopropylamide, a limited amount of tetrahydrofuran in an amount not exceeding one mole per mole of lithium diisopropylamide, and at least one C.sub.2 to C.sub.18 amine.
Type:
Grant
Filed:
December 24, 1984
Date of Patent:
June 17, 1986
Assignee:
Lithium Corporation of America, Inc.
Inventors:
Robert C. Morrison, Randy W. Hall, Terry L. Rathman
Abstract: Homogeneous storage stable solutions of cyanamide in a polyol are made by dehydrating a mixture of an aqueous cyanamide solution and at least one polyol under mild conditions. The aqueous cyanamide solution contains from 10 to 55 wt % cyanamide. The polyol may have a molecular weight of from 62 to 12,000. Polyether and/or polyester polyols having molecular weights from 400 to 12,000 are preferred. Mixtures of high and low molecular weight polyols which are not completely miscible with each other are also preferred. The dehydration is generally carried out at pressures less than 100 mbar and temperatures less than 130.degree. C. The product solution has a cyanamide content of from 0.1 to 50 wt % and a residual water content which is generally no greater than 1 wt %. These homogeneous and storage stable cyanamide in polyol solutions are particularly useful in the production of polyurethanes.
Type:
Grant
Filed:
March 22, 1985
Date of Patent:
December 31, 1985
Assignee:
Bayer Aktiengesellschaft
Inventors:
Manfred Hajek, Hanns P. Muller, Werner Rasshofer
Abstract: A cyclohexylmethyleneimine compound represented by the following general formula: ##STR1## wherein R is an alkyl group bonded to individual carbon atom of the cyclohexyl ring and n is an integer of 0 to 5, or a methyleneimine composition containing at least the cyclohexylmethyleneimine compound can be stabilized by an organic lithium compound represented by the following general formula:R'--Li,wherein R' is an alkyl, aryl or aralkyl group, and can be preserved stably for a long time.
Abstract: Mixtures which are used for the production of polyurethane foam and which contain amines having primary or secondary aliphatic hydroxyl groups, and also customary quantities of trichlorotrifluoroethane and/or trichlorofluoromethane as a blowing agent, can be stabilized against the premature reaction of the components by adding 0.05 to 5% by weight of 2,4-diphenyl-4-methylpentene in which the ratio of the 2,4-diphenyl-4-methyl-1-pentene isomer to the 2,4-diphenyl-4-methyl-2-pentene isomer is 1:1 to 9:1, the percentages relating to the chlorofluoroalkane. In particular, these mixtures can be stabilized by adding 0.1 to 5% by weight of a mixture consisting of 45 to 89% by weight of 2,4-diphenyl-4-methyl-1-pentene, 10 to 45% by weight of 2,4-diphenyl-4-methyl-2-pentene and 1 to 20% by weight of 1,1,3-trimethyl-3-phenylindane.
Abstract: Stabilized pesticide compositions for use particularly as insecticides comprise gallic acid or the propyl ester thereof in combination with an oxime carbamate of the formula ##STR1## wherein R.sub.1 can be R.sub.2 -R.sub.4 or X; R.sub.2 -R.sub.4 can be H, lower alkyl, lower alkenyl, lower alkynyl, substituted alkyl, alkenyl or alkynyl with the proviso that R.sub.2 and R.sub.3 may be connected to form a cycloaliphatic ring;R.sub.5 can be R.sub.2 -R.sub.4 or X with the proviso that when R.sub.5 and X are OR.sub.8, SR.sub.8, S(O)R.sub.8, SO.sub.2 R.sub.8, or NR.sub.8 R.sub.9, R.sub.5 and X may be connected to form a heterocyclic ring;R.sub.6 -R.sub.7 can be hydrogen, lower alkyl, lower alkenyl or lower alkynyl;X=SR.sub.8, S(O)R.sub.8, SO.sub.2 R.sub.8, OR.sub.8, OSO.sub.2 R.sub.8, NR.sub.8 R.sub.9, NO.sub.2, CN, SCN, N.sub.3 or halogen; andR.sub.8 =H, lower alkyl, lower alkenyl lower alkynyl, aryl or substituted aryl, carbamyl, substituted carbamyl, acyl, or substituted acyl; and R.sub.
Abstract: The pink color content often produced in products such as amine salts, amine oxides, betaines, quaternary ammonium compounds or other compounds derived from long chain alkyl amines is eliminated by treating the products with trace amounts of a bleaching agent. Heating of the treated amine at relatively low temperatures for a short period of time enhances the effectiveness of the bleaching agent. Long chain alkyl amines having a pink color may be similarly treated.
Abstract: Process for inhibiting formation of nitrosamines in nitro herbicide formulations containing (a) materials having nitrosatable nitrogen functional groups and (b) nitrosating agents or precursors thereof, comprising admixing with one or more ingredients of such formulations, prior to formation of nitrosamines, nitrosamine retarding amounts of at least one monoalkanolamine of the formula: ##STR1## where n is a whole number in the range of 0-5; R and R' are independently H or an alkyl group containing 1-5 carbon atoms; or at least one acid salt of said monoalkanolamines.
Abstract: Organic amine compositions which are substantially free of nitrosamine contaminants are provided which comprise an organic amine and an inhibiting amount of an inhibitor additive selected from the group consisting of 1,4-naphthoquinone, 1,4-naphthohydroquinone, alkyl-derivatives of said quinones, and mixtures of the same.