Abstract: A combination process is provided in which a gaseous mixture comprising SO.sub.x and NO.sub.x is reacted with cerium oxide at a temperature ranging from about 500.degree. C. to about 700.degree. C. to form cerium oxysulfate and a gas which is at least partially desulfurized. The latter is contacted with cerium oxysulfate at a temperature ranging from about 500.degree. C. to about 700.degree. C. in the presence of ammonia at net oxidizing conditions to reduce the NO.sub.x content of the gaseous mixture. The process may be conducted in one reaction zone or in a plurality of reaction zones. The cerium oxide reactant may be regenerated by reacting cerium oxysulfate with a reducing gas such as hydrogen.

Abstract: A paint suitable for use in a fountain brush comprising up to 5% by weight of a pigment dispersed in an aqueous medium containing a suspending agent and a surfactant dispersing agent; the paint exhibits advantageous properties used in a fountain brush comprising a brush, a reservoir containing the paint and flow-restricting means for regulating the flow of paint. The preferred suspending agent is hectorite.

Abstract: The class of compounds represented by the generic formula, Ln.sub.2 (BO.sub.2).sub.2 (CO.sub.3).sub.2 .multidot.5H.sub.2 O wherein Ln stands for a rare-earth element, have never been known to the art. These novel compounds are produced by allowing Ln.sub.2 (CO.sub.3).sub.3.mH.sub.2 O (wherein, m is a number not greater than 15) and boric acid, H.sub.3 BO.sub.3, to react with each other at a molar ratio of 1:2 under a practically air-tight condition in a container, with the CO.sub.2 gas removed continuously as it is formed in the course of the reaction.

Abstract: A hydrogen sulfide removal and conversion method in which a hydrogen sulfide-containing gas stream is contacted with a regenerable washing solution capable of absorbing the hydrogen sulfide and converting the hydrogen sulfide to hydrophobic elemental sulfur particles. After oxidative regeneration of the washing solution, the sulfur particles are transferred to a nonaqueous carrier liquid to thereby form a substantially nonaqueous sulfur slurry which is then heated to melt the sulfur and form a dense liquid sulfur product which separates by gravity from the carrier liquid.

Abstract: A process for the removal of H.sub.2 S from a feed gas, and the production of sulfur therefrom, is effected by oxidation with oxygen and/or SO.sub.2 at temperatures between 250.degree. and 450.degree. F. The oxidation is conducted in the presence of an extremely stable oxidation catalyst comprising an oxide and/or sulfide of vanadium supported on a non-alkaline porous refractory oxide. Sulfur deposition and consequent catalyst deactivation are prevented by maintaining the partial pressure of free sulfur in the oxidation reactor below that necessary for condensation. H.sub.2, CO, and light hydrocarbons present in the feed gas are not oxidized. Typical uses of the process include the removal of H.sub.2 S and the production of sulfur from sour natural gases or gases obtained from the gasification of coal.Feed gases which contain SO.sub.2 and H.sub.2 S in mole ratios greater than 0.5, or which contain other gaseous sulfur compounds such as COS, CS.sub.2, SO.sub.

Abstract: In a method of making concrete of the Portland Cement type wherein a quantity of cementitious material, such as Portland Cement, is mixed with a quantity of aggregate, generally sand and rock in varying proportions and water; and, wherein, the resulting mixture is stirred or mixed for an appropriate length of time consistent with acceptable practices in the concrete industry after which the mix is poured and allowed to set, the improvement which is characterized by the employment of fly ash as the major ingredient in the cementitious material. The improvement also includes the adding of gypsum to the initial mix in an amount equal to about 2% by weight of the fly ash and, thereafter, adding in and mixing a quantity of calcium chloride equal to about 3% by weight of the fly ash.

Abstract: Boron trichloride is prepared by free radical liquid phase chlorination of borate ester, e.g., trimethylborate, at temperatures of between about 0.degree. C. and 100.degree. C., in the presence of an inert liquid organic solvent, e.g., carbon tetrachloride. The reaction temperature is controlled by condensing and returning to the reactor vaporized solvent removed from the reactor with the gaseous reaction products of the chlorination reaction, and by removing a portion of the liquid reaction medium from the reactor to an externally cooled heat extraction zone wherein the liquid reaction medium is cooled and returning the cooled liquid reaction medium to the reactor.

Abstract: Boron trichloride containing minor amounts of phosgene as an impurity is purified by contacting a vaporous stream thereof and at least a stoichiometric amount of hydrogen, based on the phosgene impurity, with a substantially metal-free carbon catalyst under substantially anhydrous conditions at temperatures of between about 300.degree. C. and about 700.degree. C.

Abstract: Processing oil used to treat insoluble sulfur is mixed with iodine to inhibit its effect on the reversion rate of the insoluble sulfur.

Abstract: A process is described for treating an exhaust gas containing NO.sub.x and SO.sub.x in which NO.sub.x and SO.sub.x are effectively converted into industrially useful products of NH.sub.3, or sulfur by use of an aqueous absorbing solution containing at least iron chelate salt and potassium sulfite.

Abstract: In a process for producing nitric acid, a mixture of oxygen, nitrogen, nitric oxide, nitrogen dioxide, and dinitrogen tetroxide is introduced into an absorption column into which cold oxygen (below 0.degree. C.) is introduced. H.sub.2 O is introduced into the upper reaches of the column and reacts with the nitrogen dioxide and dinitrogen tetroxide to form nitric acid. The low oxygen temperature helps to shift the equilibrium between nitric oxide and oxygen to dinitrogen tetroxide and in favor of reacting the latter with water to form nitric acid.

Abstract: A process for reducing the nitrogen oxide content of coke oven gases by spraying ammonia or ammonia-containing water into the regenerator chambers of a coke oven where the coking oven waste gases are at a temperature of between 700.degree. and 1100.degree. C.

Abstract: A scrubbing solution and process of use thereof, for removing nitrogen oxides from gaseous effluents from stationary sources comprising a source of sulfite anion, a basic compound, an organic surface-active agent, and water.

Abstract: Sulphur is stabilized in a form wholly or partially insoluble in carbon disulphide by incorporating therewith a dixanthogen of the formula ##STR1## wherein R and R.sup.1 are each independently an alkyl, cycloalkyl, aralkyl or aryl group and may be substituted by halogen or alkoxy and n is 2 or 4. The insoluble sulphur can for example be plastic sulphur or white sulphur or substantially wholly insoluble sulphur derived therefrom. The sulphur is particularly useful in the vulcanization of rubber.

Abstract: A novel cement and concrete mixture is disclosed, which incorporates the spent catalysts from hydrocracking gasoline in partial substitution for the cementing agent.

Abstract: A method for producing ammonia and hydrogen sulfide in a molar ratio (NH.sub.3 /H.sub.2 S) from about 2.8 to about 3.7 from an aqueous ammonium thiosulfate solution by a method consisting essentially of: (a) contacting the aqueous ammonium thiosulfate solution with hydrogen sulfide at a temperature from about 260.degree. to about 360.degree. F. (125.degree. to 182.degree. C.) at a pressure greater than 100 psig to react at least about 70 percent of the thiosulfate to produce an aqueous solution containing ammonium polysulfide; and (b) heating the resulting aqueous ammonium polysulfide solution to produce ammonia and hydrogen sulfide in a molar ratio (NH.sub.3 /H.sub.2 S) from about 2.8 to about 3.7 and sulfur.

Abstract: A patching composition for developing a superior bond with silica refractories at temperatures of 1200.degree. to 2400.degree. F. The composition comprises three basic components: (1) a high melting phase, e.g. silica brick, fireclay grog, magnesia or high alumina grain, (2) a bonding component, e.g. sodium silicate and (3) a low melting phase, e.g. window glass. It will generally be desirable to employ a fourth component for fluxing, such as soda ash or other alkaline earth compounds. The improved results are achieved by the use primarily, of a low melting phase such as window glass, bulb glass or lead glass having a softening point between about 900.degree. and 1750.degree. F. (482.degree. to 954.degree. C.), employed in an amount of about 6 to 25% of the total solids composition.

Abstract: Processes of forming amorphous boron-carbon alloy in bulk form without crystallization are disclosed. Such products can be produced in thicknesses well in excess of ten mils by employing Reynolds number gas reactant flow conditions of 40 to 120. The resultant products of such processes having grain sizes preferably less than 30 A are also disclosed.

Abstract: Nitrogen oxides in exhaust gases are catalytically reduced in the presence of oxygen and ammonia at 200.degree. to 600.degree. C. over a catalyst of at least one catalyst component selected from the group consisting of compounds of metals of Groups 1B, 5A, 6A, 7A and 8 of the periodic table, and lanthanides and tin which is supported on a specific carrier comprising a main component of calcium silicate.

Abstract: Inorganic oxides pigments, coated with alumina are treated with water soluble hydroxy acids or salts for example sodium citrate, and with water soluble di- or polyhydric alcohols, for example pentaerythritol, or with a water soluble reaction product of excess di- or polybasic organic hydroxy acids with di- or polyhydric alcohol. Titanium dioxide pigment so treated may be used in both emulsion paint and in organic based paint systems.