Showing papers on "Ammonium hydroxide published in 1982"

Method of promoting tissue growth

Abstract: Compositions containing gelatin, hydrogen peroxide, ammonium hydroxide, thioglycolic acid, and a lower alkanol as the principal ingredients are useful to promote the growth of dermal and epidermal tissue.

Preparation of linear polyethylenepolyamines with an aluminum phosphate catalyst

Abstract: A method of preparing predominantly linear polyethylenepolyamines from ethylenediamine and monoethanolamine reactants with an aluminum phosphate catalyst prepared from alumina, phosphoric acid, ammonium hydroxide and water is disclosed.

Polyurethane quaternary ammonium salts

Abstract: Polyurethane quaternary ammonium salts are obtained by heating a solution of a polyurethane resin characterized by having present in the polymer backbone hydroxyl groups and at least one substituent selected from the group consisting of carboxylate radicals and carboxyl radicals dissolved in a water-miscible organic solvent for the resin at a temperature above 64° C. and below the decomposition temperature of said polyurethane resin with an organic chloride for a period of time; adding a strong base to the reaction mixture and continuing to heat said mixture to form a polyurethane quaternary ammonium hydroxide in solution; and precipitating the polyurethane quaternary ammonium hydroxide by pouring the reaction mixture into an excess of water. The polyurethane quaternary ammonium hydroxide so obtained may be dissolved in a solvent containing sufficient hydrochloric acid to bring the pH of the solution to 8; and the corresponding polyurethane quaternary ammonium chloride may be recovered from solution by evaporation of the solvent at a temperature below the decomposition point of the polyurethane quaternary ammonium chloride. A polyurethane quaternary ammonium sulfate may be prepared by dissolving in sulfuric acid a polyurethane resin characterized by having present in the polymer backbone hydroxyl groups and lactone groups to form a solution. This solution is added to an excess of water with stirring and neutralized with sodium hydroxide to bring the pH of the diluted solution to between 3 and 4. Evaporation of the solvent gives a residue containing a polyurethane quaternary ammonium sulfate and sodium sulfate. The polyurethane quaternary ammonium sulfate may be separated from the mixture by extraction with methanol.

Method for manufacture of AMS-IB crystalline borosilicate molecular sieve

Abstract: AMS-1B crystalline borosilicate molecular sieve is prepared by reacting under crystallization conditions, in substantial absence of a metal or ammonium hydroxide, an aqueous mixture containing an oxide of silicon, an oxide of boron, an alkylammonium cation or a precursor of an alkylammonium cation, and ethylenediamine, and the product formed from such method.

Composition of fatty acids obtained by decomposition of castor oil fatty acid estolides

Abstract: The composition (wt %) of the fatty acids obtained by decomposition of castor oil fatty acid estolides and distillation was determined by a combination of spectroscopic (ultraviolet, nuclear magnetic resonance, infrared), chromatographic (thin layer on Silica Gel G modified with silver nitrate and ammonium hydroxide, gas liquid) and chemical (partial reduction and periodate/permanganate oxidation) techniques and found to be 16:0, 2.7; 18:0, 2.6; 18:1, 5.2; conjugatedcis,trans (trans,cis)-18:2, 34.4; conjugatedcis,cis-18:2, 9.7; conjugatedtrans,trans-18:2, 3.9; 9-cis,12-trans-18:2, 20.8; 9-trans,12-cis-18:2, 2.3; and 9-cis,-18:2, 18.4.

Process for the synthesis of iron powder

Abstract: A process for preparing iron powder suitable for use in preparing the iron-potassium perchlorate heat-powder fuel mixture used in thermal batteries, comprises preparing a homogeneous, dense iron oxide hydroxide precipitate by homogeneous precipitation from an aqueous mixture of a ferric salt, formic or sulfuric acid, ammonium hydroxide and urea as precipitating agent; and then reducing the dense iron oxide hydroxide by treatment with hydrogen to prepare the iron powder.

Cooked flavours for smoking products

Abstract: Reducing sugars are reacted with ammonium hydroxide or ammonium salts, preferably in a weight ratio of 5 to 15 : 1, in the presence of a trace amount of certain amino acids, preferably in a weight ratio of sugar to amino acid of 200 to 300 : 1, to produce reaction flavors for use in smoking compositions and particularly those having a high content of tobacco stems.

Synthesis of nitrogen-15-labelled primary amines via organoborane reactions

Abstract: 15 N-Labelled primary amines are readily snythesized via the reaction of organoboranes with 15N-enriched ammonium hydroxide; functionally substituted organic amines are efficently prepared via the new synthesis.

Fluororesin-containing coating composition

Abstract: An aqueous coating composition comprising a fluororesin, and (a) molybdic acid or its salt, (b) phosphoric acid or its salt, (c) ammonium hydroxide and (d) colloidal silica, the weight ratio of the fluororesin to the total amount of the ingredients (a), (b), (c) and (d) being 90:10 to 20:80 and the molar ratio of (a) molybdic acid or its salt as converted to MoOs, (b) Phosphoric acid or its salt as converted to orthophosphoric acid, (c) ammonium hydroxide and (d) colloidal silica being 1:1:1:1 to 1:20:15:20 has good adhesivity, good corrosion resistance and heat resistance without exerting any toxicity and causing any pollution problem.

Anode for electrolysis of water

Abstract: PURPOSE:To provide an anode for electrolysis of water of a low oxygen overvoltage and high durability by using ruthenium oxide of small contents of chlorine as an essential component for active components. CONSTITUTION:Ruthenium chloride is caused to react with an alkali to allow the precipitate of ruthenium hydroxide to form. For example, ammoniac water, ammonium hydroxide or the like is used as the alkali. The formed precipitate is washed by using dechlorinated pure water. The residual amt. of the chlorine after the washing is kept at roughly <=0.3wt%, more preferably, <=0.1wt%. The resultant ruthenium hydroxide is converted to ruthenium oxide by heating. The heating temp. is usually about 400-700 deg.C, and the heating time about 1-6hr. Such ruthenium oxide is controlled to about 200 meshes grain sizes, and is mixed with a binder and a surfactant and the mixture is prepared into a paste. This paste is press-stuck by heating to an ion exchange membrane, whereby an anode is formed. The anode is preferably of about 0.01-1,000mu average pore sizes and about 20-95% porosities.

Preparation of 4-amino-3,5,6-trichloropicolinic acid

Abstract: Process for producing 4-amino-3,5,6-trichloropicolinic acid by reacting 3,4,5,6-tetrachloropicolinonitrile with ammonium hydroxide, preferably at 130 to 160 °C. The free acid is precipitated upon acidification of the reaction mixture and may be recovered therefrom.

Ammonium hydroxide stripping of tungsten from organic solvents

Abstract: A process for stripping tungsten values from a tungsten-bearing acidic liquid organic phase into a basic aqueous ammoniacal stripping solution comprises mixing the organic phase and the stripping solution with a high-shear mixing device to maximize the pH gradient between the organic phase and the aqueous solution whereby growth of any precipitated ammonium paratungstate crystals is minimized and the dissolution thereof is maximized and to strip the tungsten values from the organic phase into the stripping solution.

Electrolytic desulfurization of anilino sulfur compounds

Abstract: Various substituted ortho-alkyl anilines are prepared by electrolytic desulfurization of various benzyl sulfides, sulfoxides and sulfones, e.g. 2-methyl-6-trifluoromethylaniline is prepared from 2-amino-3-trifluoromethylbenzyl sulfides, sulfoxides and sulfones. The processes are conducted in concentrated aqueous quaternary ammonium hydroxide, as well as in aprotic media. The substituted anilines obtained are useful as intermediates for herbicide compounds.

Separation of uranium and molybdenum using a solvent

Abstract: A process for separating by means of an organic agent the uranium and the molybdenum contained in an aqueous liquor originating from a sulphuric attack of an urano-molybdeniferous ore which involves placing the said attacking liquor in contact with an organic extraction solution containing at least one tertiary or secondary amine in an (amine)/(Mo) molar ratio of up to 0.8, separating the molybdenum-charged organic phase from the uranium-rich aqueous phase, treating the organic phase with an aqueous liquor containing at least one mineral agent in the form of alkaline and ammonium hydroxide and/or carbonates to form an aqueous solution which is concentrated in molybdate.

Stable compositions for injection, containing hydrochlorothiazide

Abstract: Hydrochlorothiazide can be converted into stable, rapidly soluble, freeze-dried compositions for injections when it is dissolved, before the freeze drying, in aqueous ammonium hydroxide solution or aqueous solution of a volatile amine. The compositions can additionally contain potassium canrenoate and are, despite this, stable. The dissolution is carried out at a pH of 9-11, preferably in a KOH-glycine buffer mixture.

Process for improving the properties of meals and flours of oily seeds

Abstract: HOE 77/F 225 PROCESS FOR IMPROVING THE PROPERTIES OF MEALS AND FLOURS OF OILY SEEDS of the disclosure: A process for improving the properties of meals or flours of oily seeds by reducing their content of lipoid and water-soluble compounds, which comprises treating the crushed or ground seeds with an liquid extractant comprising ammonia or ammonium hydroxide and an organic solvent of the formula I R1 - (CnH2n) - OR2 (I) in which either R1 and R2 each are hydrogen and n is 1, 2 or 3; or R1 is a hydroxy group, R2 is hydrogen, methyl or ethyl, and n is 2 or 3; and after having removed the liquid extractant, washing the residue of the seeds with water.

Process for recovering nickel from spent electroless nickel plating solutions

Abstract: A process for recovering nickel from spent electroless nickel plating solutions by adjusting the pH of the solution to 10-10.5 with sodium hydroxide, adding ammonium hydroxide to obtain a pH of 11 of the solution, and heating the solution at 40°-50° C. while subjecting the solution to electrolysis to deposit nickel from the spent solution and separating the deposited nickel such that the spent solution may be safely discharged as effluent.

Process for the production of basic zirconium carbonate

Abstract: 1. Process for the preparation of an acid soluble and basic zirconium carbonate calcinable to a pure highly dispersed zirconium oxide from pure zirconium salts by reaction of the solid salts with ammonium hydroxide solution, separation of the basic zirconium salts obtained and conversion to the basic zirconium carbonate, characterised in that the carbonization is carried out in a urea solution undergoing hydrolytic decomposition thereof.

Tellurium imaging composition including water

Abstract: Imaging compositions employing a tellurium compound, a reductant precursor, a masked reducing agent and a source of labile hydrogen are improved by the inclusion of a base which may be inorganic or organic Suitable inorganic bases include alkali metal hydroxides, alkaline earth metal hydroxides and ammonium hydroxide Suitable organic bases include amines and heterocyclic nitrogen atom containing compounds

Process for producing virtually pure solutions of alkali metal sulphates or ammonium sulphates or of sulphuric acid from effluents

Abstract: From a solution of sulphates and/or hydrogen sulphates and/or sulphuric acid, at least a part of the cations is precipitated, by the addition of alkaline compounds such as ammonium hydroxide, as sparingly soluble oxides or hydroxides and the solution is either evaporated to dryness and the sulphates formed are utilised (recycled), or it is fed to a strongly acidic cation exchanger, by means of which the alkali metal ions are bound and the remaining sulphuric acid is utilised. The precipitation may be complete immediately or may be effected stepwise by setting the pH accordingly. In the second case, the increase of the pH can be interrupted at a certain value and the solution remaining after removal of the precipitate can be treated with a chelate-forming cation exchanger which binds the remaining cations, at least in part. The ammonium ions can be removed from the exchanger by an acid of the type which forms thermally decomposable compounds with the ammonium ions, the ammonium ions, firstly, being recovered as ammonia and, secondly, the acid employed for regeneration being recovered.

Production of quaternary ammonium hydroxide by electrolysis

Abstract: PURPOSE:To improve production efficiency and to make the stable continuation of electrolysis over a long period of time possible in the stage of electrolyzing quaternary ammonium chloride and producing quaternary ammonium hydroxide by electrolyzing the same under specific electrolytic conditions CONSTITUTION:An electrolytic cell segmented to an anode chamber and a cathode chamber by a fluorocarbon cation exchange membrane of 05-30mg equiv/g dry resin in cation exchange capacity is used, wherein an anode provided with a coating layer contg Pt group metallic oxide on a Ti base body and cathode of iron, stainless steel or Ni are used An aq soln of 10-50% concns of the quaternary ammonium chloride expressed by the formula (I) is supplied as a raw material into the anode chamber, and water is supplied to the cathode chamber, thence said soln is electrolyzed at 01-5A/lh anolyte current density There is no consumption of the anode, and the stable electrolysis is continued with low voltage and high current efficiency over a long period of time

Recovery and recycle of molybdenum values from coal residue

Abstract: The residue form a Mo-catalyzed coal liquefaction process is treated to recover the Mo in a form in which the Mo can easily be recycled and reused as a catalyst for coal liquifaction. The process includes intimately mixing the residue with alkali in excess of the stoichiometric amount required for water-soluble molybdate formation, subjecting the mixture to an oxidative roast at about 600 °C to about 800 °C for up to about one hour, leaching the roasted product with water to extract Mo values into solution, and then carrying out a series of steps involving acidifying and ammoniating the solution to form a Mo-bearing precipitate which is recovered and dissolved in aqueous ammonium hydroxide to form a solution which can be applied to coal to catalyze coal liquefaction.

Process for the separation of lipoid and watersoluble compounds from raw proteins of animal origin

Abstract: of EP00179561. Process for the removal of lipoid and water-soluble compounds from protein material of animal origin, characterized by treating the dried and grinded crude protein with an extraction mixture consisting of ammonia or ammonium hydroxide and an organic solent of the general formula I R1 -(Cn H2n )-OR2 wherein either R1 and R2 mean hydrogen and n is one, two or three or wherein R1 means hydroxy and R2 means hydrogen, methyl or ethyl and n is two or three, and after separating the extraction mixture washing the residue with water.

Regeneration of activated carbon employed in the wet process production of phosphoric acid

Abstract: In a process for regenerating the activated carbon and in the purification of brown phosphoric acid or alkali phosphates obtained via the so-called wet process employing mineral acid digestion of crushed phosphate rock, the activated carbon used to filter brown H3PO4 is removed from service, washed with water, the initial washings being recovered to reclaim phosphoric acid, and then steeped in a basic aqueous solution, e.g., aqueous alkali hydroxide, alkali carbonate, ammonium hydroxide, loweralkyl amines or loweralkanol amines. After again water washing the activated carbon, to remove residual base, the activated carbon is either returned to service or steeped in an aqueous solution of mineral acid, e.g., sulfuric, hydrocloric, or nitric acid, again washed with water to remove residual acid and returned to service. Usually, the acid steep need not be employed with every base cycle to maintain good decolorization, although if desired the acid steep can be used with each caustic cycle.