Abstract: A process of recovering Cl.sub.2 from a stream of HCl includes the steps of providing a first fluidized bed of a carrier catalyst CuO in a first reaction zone; supplying HCl in a first stream to that zone for reaction with CuO in the bed to produce CuCl.sub.2, H.sub.2 O and heat, removing CuCl.sub.2 from the zone in a second stream, removing H.sub.2 O from the zone and removing heat from the zone; feeding the second stream to a second reaction zone, and providing a second fluidized bed of CuCl.sub.2 in the second reaction zone; and supplying O.sub.2 in a third stream to the second zone for reaction with CuCl.sub.2 in the second bed at elevated temperature to produce CuO and Cl.sub.2, removing Cl.sub.2 from the second zone in a fourth stream, and removing CuO from the second bed for re-use as a catalyst to produce CuCl.sub.2.

Abstract: A process for producing chlorides by the chlorination of a material selected from the group consisting of aluminous materials and metal and metalloid oxides in the presence of a reductant. The method comprises calcining a carbonaceous material with added steam to oxidize substantially all precursors of chlorinated hydrocarbons and to form a reductant; and chlorinating a material selected from the group consisting of aluminous materials and metal oxides in the presence of the reductant.

Abstract: A method of disposing of organic chlorine compounds by burning them in contact with a catalyst of composite oxides selected from titanium-silicon composite oxides, titanium-zirconium composite oxides, and titanium-silicon-zirconium composite oxides, whereby the resulting hydrogen chloride (HCl) is adsorbed by a basic absorbent.

Abstract: A process for preparing hydrogen fluoride involving treating anhydrous hydrogen fluoride containing primarily trivalent arsenic impurities with an effective amount of chromium (VI) oxide (i.e., CrO.sub.3) and oxygen such as to oxidize substantially all of the trivalent arsenic to pentavalent arsenic (i.e., As.sup.+3 .fwdarw.As.sup.+5) followed by separation and recovery (e.g., by distillation) of purified anhydrous hydrogen fluoride.

Abstract: A method for purifying hydrofluoric acid, comprising the steps of filtering the hydrofluoric acid to remove particulates, passing the filtered acid through a cation exchange material and an anion exchange material to remove ions therefrom, at least periodically automatically monitoring the acid that has passed through at least a predetermined portion of the cation exchange material for a predetermined level of cationic impurity representative of actual or impending ionic breakthrough in the cation exchange material, at least periodically automatically monitoring the acid that has passed through at least a predetermined portion of the anion exchange material for a predetermined level of anionic impurity representative of ionic breakthrough in the anion exchange material, automatically interrupting flow of acid through the anionic or cationic exchange material at or prior to the time the breakthrough in such material occurs, while the flow is interrupted, regenerating the anionic or cationic exchange material,

Abstract: Many impurities of sulfuryl fluroide are removed by selective adsorption on activated alumina and activated carbon. Thionyl fluoride, hydrogen fluoride, hydrogen chloride, and water are removed by treating contaminated sulfuryl fluoride with activated alumina. Sulfur dioxide and 1,2-dichloroethane are removed by treating contaminated sulfuryl fluoride with activated carbon. When sulfuryl fluoride is treated with the two adsorbents in sequence, sulfuryl fluoride of exceptionally high purity is obtained.

Abstract: Nitrosyl fluoride (NOF) is prepared in a simple and economical manner with high yield by reacting nitrosyl sulphuric acid (ONOSO.sub.3 H) with hydrofluoric acid, operating in the liquid phase in the presence of water.

Abstract: A method for regulating the temperature at which two or more substances combine to form end product in the reactor, at least one of said substances produced from two or more reactants in the reactor, said method comprising: combining at least some of the reactants in a vessel thermally isolated from the reactor to produce substance in the vessel; and transferring substance from said vessel to the reactor. The invention constitutes an improved method for producing magnesium chloride by heating magnesium carbonate in packed bed reactor; passing carbon monoxide and chlorine gas through the packed bed; and withdrawing carbon dioxide from above the packed bed and molten magnesium chloride from below said bed. This improvement consists essentially of reacting at least some carbon monoxide and chlorine in a continuously-cooled vessel to form phosgene; and substituting a sufficient amount of phosgene from the vessel for the carbon monoxide and chlorine gas otherwise passed through said packed bed.

Abstract: Anhydrous ferric fluoride of 99.0% purity or greater, based upon F.sup.- analysis is afforded, as well as a process for its manufacture using anhydrous FeCl.sub.3 and liquid anhydrous HF, reacted in the substantial absence of O.sub.2, H.sub.2 O, or an oxidizing agent.

Abstract: A process for recovering purified cesium chloride from a cesium aluminum silicate ore in which the ore is digested with aqueous hydrochloric acid and the silica solids removed to obtain an aqueous acidic digest solution of metal chlorides consisting of cesium chloride together with other metal chlorides, by(a) evaporating water from the digest solution to obtain a solid mixture of metal chlorides, including cesium chloride and hydrated aluminum chloride;(b) heating solid phase mixture at a temperature effective for converting the hydrated aluminum chloride to aluminum oxide without decomposing the cesium chloride;(c) extracting the resulting solids with water to obtain an aqueous extract of cesium chloride; and(d) separating the residual solids containing the aluminum oxide to produce a purified extract of cesium chloride.

Abstract: A process is disclosed for the regeneration of pickling solutions which contain ZrF.sub.4 by addition of a Na compound in which a charge of the pickling solution to be regenerated is analyzed and heated. The amount of Na required for the regeneration is determined in each case and is admixed with intense stirring. Then the mixture is cooled, the precipitated NaZrF compounds are separated and a regenerated pickling solution is recovered.

Abstract: The invention relates to a process for purifyng crude gaseous hydrogen chloride originating from plants producing silane or siloxane and containing as impurities silanes which contain chlorine and/or organic radicals, water, alkanols, hydrocarbons, chlorinated hydrocarbons, organic acids and derivatives thereof, by condensation, compression and fractional distillation. In this process, the crude gas is at least partially freed from condensable products by cooling to -35.degree. C., then compressed in a screw compressor with oil injection to 1.5 MPa, the oil is separated off, freed from gel-containing residues through a filter web and again recycled into the compressor. The compressed hydrogen chloride gas is fractionated in a distillation column under pressure and hydrogen chloride having a purity of 99.999 percent is recovered.

Abstract: A method of decomposing organic halogen compounds including fluorinated hydrocarbons in the gaseous phase on superacid catalysts comprising titanium dioxide, with the formation of carbon doixide and hydrogen halides and particularly hydrolysis of perhalogenated methane derivatives on a sulfated titanium dioxide catalyst, and hydrolysis and oxidation of organic halogen compounds on a catalyst of sulfated copper oxide and sulfated titanium dioxide. The hydrogen halides liberated by the decomposition of the organic halogen compounds can be easily removed by conventional methods such as scrubbing with water.

Abstract: A process for producing chlorine dioxide by reducing a chlorate in sulphuric acid of at least 4N with a reducing agent. An oxygen containing organic compound is introduced into the process.

Abstract: A method to purify impure gaseous hydrogen chloride containing an unsaturated chlorinated hydrocarbon contaminant in an amount less than that necessary to inhibit purification, comprising exposing the impure hydrogen chloride to an ultraviolet light source in the presence of gaseous chloride for a sufficient time for the gaseous chloride to react with organic impurities in the hydrogen chloride to form heavier organic compounds and thereafter separating the heavier compounds from the hydrogen chloride.

Abstract: A process for drying a gaseous hydrogen halide of the formula HX, wherein X is bromine, Chlorine, FLuorine, or iodine, to remove water impurity therefrom, in which a scavenger precursor composition is provided, including a support having associated therewith partially or fully alkylated metal alkyl compounds or pendant groups. The precursor composition is reacted with gaseous hydrogen halide to convert the metal alkyl compounds and/or pendant functional groups to the corresponding metal halide compounds and/or pendant functional groups, which in turn react with the water impurity to produce an essentially completely water-free (below 0.1 ppm) gaseous hydrogen halide effluent. The process of the invention has utility for producing high purity, anhydrous gaseous hydrogen halides for semiconductor manufacturing operations.

Abstract: A process for preparing ammine salts of aluminum iodide by reaction of aluminum, an iodine compound and ammonia is reported in which the reactants are reacted without mercury as a catalyst in the liquid ammonia phase at a temperature from 20.degree. to 600.degree. C. and a pressure from 8 to 2,000 bar and excess ammonia is evaporated off after the reaction is completed.The process makes possible the preparation of hexamminealuminum iodide monoammoniate, hexamminealuminum iodide and pentamminealuminum iodide.

Abstract: The present invention provides a method of recovering a lithium chloride, which comprises reacting a dihalogenated aromatic compound and an alkali metal sulfide and/or alkali metal hydrogen sulfide in a polar solvent under the pressure of lithium chloride, separating a solvent insoluble component from the resultant reaction mixture to obtain a solution, and calcinating a residue obtained by removing volatile substances from the resultant solution, as well as a method of recovering a lithium chloride, which comprises reacting a dihalogenated aromatic compound and an alkali metal sulfide and/or alkali metal hydrogen sulfide in a polar solvent under the pressure of lithium chloride, separating the granular polymer ingredient from the resultant reaction mixture subjecting the liquid suspension obtained by said separation to solid-liquid separation and calcinating the residue obtained by removing volatile substances from the resultant solution component.

Abstract: A method for producing titanium fluoride comprises: a dissolution process, wherein iron-containing titanium material is dissolved in solutions containing hydrofluoric acid, fluoride solutions being produced; a first crystallization and separation process, wherein ferric fluoride is crystallized and ferric fluoride crystals thus obtained are separated from the fluoride solutions by cooling the fluoride solutions, crude titanium fluoride solutions being produced; a second crystallization and separation process, wherein a mixed salt of (NH.sub.4).sub.2 TiF.sub.6 and (NH).sub.3 FeF.sub.6 is crystallized and separated by mixing ammonium fluoride solutions with the crude titanium fluoride solutions to obtain a mixture and concentrating the mixture; a first pyrolysis process, wherein the ammonium fluoride salt is pyrolyzed at a temperature of from 300.degree. to 800.degree. C. in a stream of dry gas after having dried the ammonium fluoride, solid ferric fluoride (FeF.sub.3) and gaseous TF.sub.4, HF and NH.sub.

Abstract: A process comprising preparation of an alkanol and elemental iodine by contacting an iodoalkane containing 1 to 20 carbons, water and molecular oxygen at a temperature in the range of about 50.degree. to about 200.degree. C. and recovering the elemental iodine.