Abstract: Hydrogen peroxide is synthesized by contacting hydrogen and oxygen with a supported palladium catalyst in the presence of methanol. Preferably, the methanol contains up to 1.0% by weight of formaldehyde and is at least 0.0001 N in hydrochloric acid.

Abstract: A method of stabilizing aqueous hydrogen peroxide solutions against decomposition catalyzed by a combination of iron and copper consists of adding to the solution an amount of alkali metal meta- and pyrophosphates effective to prevent decomposition and adjusting the pH of the solution to 2-4.

Abstract: In a process for preparing hydrogen peroxide by reacting hydrogen with oxygen in the presence of a catalyst in an aqueous medium containing hydrogen peroxide, the improvement which comprises using an aqueous medium which contains dissolved hydrogen and a platinum-group catalyst having adsorbed thereto hydrogen.

Abstract: Waste heat which would otherwise be lost up a stack or chimney may be employed to generate hydrogen or hydrogen peroxide through the use of special equipment including a heat exchange structure associated with the stack or chimney. Through one heat exchange structure, water is formed into steam. Then, in one or more additional heat exchangers, the steam is converted into hydrogen gas and/or hydrogen peroxide. The active material in the additional heat exchanger arrangements may include both (1) a metal oxide, such as manganese oxide, which successively sequesters oxygen from water vapor, and then as the pressure is reduced in later portion of the cycle, releases the captured oxygen; and may also or alternatively include (2) host and sensitizer material for shifting the output radiation into one of the absorption bands for water vapor.

Abstract: A process of reacting in the liquid phase a hexacoordinated ruthenium(II) complex with oxygen in the presence of a source of hydrogen ions under conditions forming hydrogen peroxide and the corresponding hexacoordinated ruthenium(III) complex and reacting the hexacoordinated ruthenium(III) complex with hydrogen sulfide to form elemental sulfur and regenerate the hexacoordinated ruthenium(II) complex, the hexacoordinated ruthenium(III) complex having a reduction potential of not more than +0.68. Five or six of the ligands of the ruthenium complexes are non-labile in both valence states.

Abstract: A catalytic system for oxidation of organic compounds including olefins, cyclic ketones and secondary alcohols. Soluble peroxo or solid supported oxo or peroxo complexes of molybdenum or tungsten are used in the presence of hydrogen peroxide to effect the oxidation. The resulting products include lactones, hydroxy acids, ketoacids, hydroxy esters and ketoesters from cyclic ketones; ketones from secondary alcohols and polyols or derivatives thereof from allylic alcohols.

Abstract: Aqueous hydrogen peroxide solutions used in metal dissolution processes are effectively stabilized against decomposition caused by metal ion contaminants by addition of saccharin or an alkali-metal salt of saccharin to the solutions.

Abstract: Aqueous hydrogen peroxide solutions are stabilized against decomposition due to transition metal impurities by adding at least about 0.001 milliliters of acetonitrile per milliliter of total solution.

Abstract: Hydrogen peroxide in aqueous solution is stabilized against decomposition due to transition metal impurities by a synergistic combination of sulfonic acid type ion exchange resin and acetonitrile.

Abstract: Hydrogen peroxide is synthesized by reacting hydrogen and oxygen in a two phase mixture of water and an organic. The mixture contains a catalyst which is insoluble in water but dissolves in the organic. The hydrogen peroxide is extracted in the water.The catalyst is L.sub.2 MX.sub.2 where:L is a ligand containing a Group 5b element (preferably phosphorous);M is a Group 8 metal (preferably palladium); andX is a halogen (preferably chlorine).

Abstract: Aqueous hydrogen peroxide solutions containing (1) an organophosphorus compound selected from the group consisting of alkylidene diphosphonic acids, aminotri(methylenephosphonic acid), ethylenediaminetetra(methylenephosphonic acid), and soluble alkali metal salts of the foregoing acids an (2) and organic hydroxy compound selected from allyl alcohol, methallyl alcohol, phenol, o-chlorophenol, o-nitrophenol, o-aminophenol, p-chlorophenol, p-nitrophenol, p-aminophenol, and mixtures thereof are stable during use over a pH range of about 0.5 to 10 against catalytic decomposition by heavy metal ions and by surfaces of insoluble heavy metal sulfides. The stabilizer combinations of this invention are apparently synergistic and give unexpected hydrogen peroxide stability. The stabilized hydrogen peroxide solutions of the invention are especially useful in hydrometallurgical processes and in mineral separations and purifications.

Abstract: Aqueous hydrogen peroxide solutions are stabilized with the use of phenylphosphonic acids or salts thereof, preferably in combination with known stabilizer additives: stannates, nitrates, and pyrophosphates.

Abstract: Aqueous hydrogen peroxide solutions are stabilized with the use of cyanoalkyl ethers of trialkanolamines, such as the condensation product of triethanolamine and acrylonitrile, preferably in combination with known stabilizer additives, i.e., stannates, nitrates, and pyrophosphates.

Abstract: Aqueous hydrogen peroxide solutions are stabilized with the use of phosphorous triamides and phosphoric triamides such as hexamethylphosphorous triamide, hexamethylphosphoric triamide, and bis(dimethylamino)morpholinophosphorus oxide, preferably in combination with known stabilizer additives, i.e., stannates, nitrates, and pyrophosphates.

Abstract: Hydrogen peroxide-containing acidic baths for pickling metals, the bath compositions being stabilized according to the invention so that the baths can be used over long periods of time without appreciable decomposition of hydrogen peroxide, such baths containing from about 10 to 400 g/liter of sulfuric acid, 2 to 80 g/liter of 100% hydrogen peroxide, and 10 to 500 mg/liter of an oxyquinoline derivative stabilizer, the compositions optionally containing a surface active agent, and/or from 0.3 to 2 g/liter of fatty alcohol-ethylene oxide polycondensate stabilizer as well as methods for pickling metals using such baths.

Abstract: Aqueous hydrogen peroxide solutions are stabilized with the use of a 3-N-morpholinylpropionitrile, preferably in combination with known stabilizer additives, i.e., stannates, nitrates, and pyrophosphates.

Abstract: A process for preparing hydrogen peroxide which comprises reacting hydrogen with oxygen in an aqueous medium containing a platinum-group catalyst, characterized in that the partial pressure of hydrogen and the partial pressure of oxygen in the gaseous phase of the reaction system are maintained at at least 0.5 atmosphere and at least 1.0 atmosphere respectively, and the platinum group catalyst is caused to be present in an amount, calculated as metal, of at least a minimum effective catalytic amount up to 30 mg per 100 ml. of said aqueous medium.

Abstract: Hydrogen peroxide is produced by contacting hydrogen and oxygen with a supported catalyst in the presence of water, an organic nitrogen containing compound and a strong acid. The hydrogen peroxide so produced can be used in processes for the oxidation of organic materials.

Abstract: A process is described for purifying liquids by cryogenic sublimation. This process involves solidifying the liquid by reducing the temperature and pressure to below the triple point. Purification is then carried out by direct transformation from the solid to the vapor phase. Because of increased differentials in vapor pressures at the low temperature at which the procedure is carried out, this purification process is highly efficient and is also particularly suitable for liquids that are susceptible to decomposition with ordinary purification procedures requiring elevated temperatures. The procedure is also advantageous in separating azeotropes, structurally similar compounds, as well as treating flammable, hydroscopic, corrosive and fuming compounds.

Abstract: Ion-exchange resins provide a convenient means for reducing the concentration of hydrogen peroxide in drycleaning solvents. The ion-exchange method is adaptable to automated drycleaning processes requiring removal of residual hydrogen peroxide from fabrics.