Abstract: The present invention relates to metal-magnesium compounds, a process for preparing same and the use thereof, especially for the preparation of finely divided, possibly amorphous, metal and alloy powders and/or of intermetallic compounds, both procedures via a non-metallurgical route in organic solvents under mild conditions.

Abstract: Disclosed is a basic aluminum material having enhanced antiperspirant activity, the material having the empirical formula Al.sub.2 (OH).sub.6-a X.sub.a, where 0.5.ltoreq.a.ltoreq.5.0, and X is a univalent complex oxoanion of nitrogen, chlorine and other halogens, which forms salts with Al.sup.3+ in aqueous solution so that these salts are essentially completely dissociated, which is readily soluble in water with metallic ions in the solution, and which forms conjugate acids that are strong acids; and wherein the material is characterized by:(a) size exclusion high performance liquid chromatography peaks corresponding to peak 3 and peak 4 of size exclusion chromatograms formed by HPLC technique;(b) a peak 4 relative area of at least 25%, a peak 3 relative area of less than 60%, the sum of the relative peak 3 and peak 4 areas being at least 50%; and(c) less than 10% chromatographic peaks eluting at shorter retention times than peak 3, corresponding to peaks 1 and 2.

Abstract: The invention relates to high basicity polyaluminumchlorosulfates and their preparation process, said polyaluminumchlorosulfates being useful in the treatment of drinking water, aqueous effluents, and in the papermaking industry and having the formula:Al(OH).sub.a Cl.sub.b (SO.sub.4).sub.c M.sub.d N.sub.ein which:M is an alkaline-earth metal;N is an alkaline metal;a, b, c, d and e are numbers such that:1.95<a<2.4; 0<c<0.15; 0<d<0.16;0<e<1.7; a+b+2c=3+2d+e.

Abstract: Ammonium pentachloromonoaquorhodate(III), (NH.sub.4).sub.2 RhCl.sub.5 (H.sub.2 O), is a useful photographic chemical. Small amounts of rhodium-containing, water soluble species remain in solution in the process liquor after synthesis. Most of the soluble rhodium values are present as the aforementioned ammonium complex; however there are traces of the cis and trans isomers of ammonium tetrachlorodiaquorhodate(III), and traces of the fac and/or mer isomers of rhodium(III) chloride triaquo complexes. Rhodium values present in the liquid as ammonium pentachloromonoaquorhodate(III) can be recovered by the addition of cesium chloride to form a precipitate identified as Cs.sub.2 RhCl.sub.5 (H.sub.2 O). Very little of the aforementioned fac and mer isomers or other contaminants, if any, are contained in the precipitate. The cesium rhodium pentachloride monohydrate product can be refined, for recovery of rhodium values, or used as an additive to a silver halide emulsion to control fog or stabilize the emulsion.

Abstract: This invention relates to methods and systems for purifying brine for electrolysis in chlor-alkali cells, especially membrane cells by reducing the sulfate ion concentration, while at the same time minimizing the concentration of other undesireable ions such as calcium and chlorate. The methods and systems employed are unique combinations of refrigeration and crystalization, and brine recirculation techniques in the systems for electrolyzing brine.

Abstract: Cubic conductive copper oxide ceramics which are represented by the following formula I:(M.sub.x Cu.sub.y).sub.7 O.sub.z A.sub.w Iwherein M represents at least one element selected from the group consisting of In, Sc, Y, Tl, and Ga, A represents Cl, NO.sub.3, or Cl and NO.sub.3, x+Y is a value of 1, x/y is a number of 0 to 10, z is a number of from 6 to 8, and w is a number of from 1 to 9, and processes for producing same by mixing at least one nitrate and/or chloride of a metal selected from the group consisting of In, Sc, Y, Tl, and Ga, with copper nitrate and/or copper chloride, and firing the mixture at from 200.degree. to 600.degree. C. The copper oxide ceramics are preferably used as electrodes in various fields, heat emiters and also as a material for producing superconductors.

Abstract: A method for reducing impurity levels of calcium, magnesium and/or silicon in hexammine cobalt halide compounds involves the addition of ferric ions and, optionally, soluble fluorides to an aqueous hexammine cobalt (III) chloride solution having a pH of at least 9. Insoluble compounds of magnesium fluoride, calcium fluoride, and/or ferric hydroxide and silicon coprecipitates are removed from the solution by filtration.

Abstract: A process for continuously preparing silane and a coproduct by reacting a metal hydride such as NaAlH.sub.4 with a silicon halide such as SiF.sub.4, utilizing, in conducting the reaction, equipment which includes, in series, a primary reactor, a secondary reactor and a separation zone. The metal hydride is reacted in the first reactor with less than a stoichiometric amount of the silicon halide, and the unreacted metal hydride is then passed to the second reactor wherein the remainder of the hydride is reacted in the secondary reactor, in which a stoichiometric excess of the silicon halide is added. The rate of silicon halide or metal hydride addition is governed by a temperature differential feed back from the reaction in the secondary reactor so that overall a stoichiometric or substantially stoichiometric operation is achieved.

Abstract: A process for preparing a compound using a vanadium oxide derivative for the cathode of a thermal cell. According to the invention, a powdered mixture is produced using vanadium pentoxide, a carbon, and a mixture of alkaline halides; then heat processing is conducted at a temperature ranging from 360.degree. C. to 650.degree. C. for a period ranging from 15 minutes to 2 hours inclusive.A cathode material for a thermal cell is obtained which displays a stable discharge voltage (curve A).

Abstract: A novel anion exchange material comprising substantially crystalline inorganic mixed metal hydroxides and mixed metal hydrated oxides exhibiting anion exchange properties at temperatures up to about 150.degree. C. and a method of preparing the same is disclosed. The anion exchanger composition is prepared by coprecipitating hydroxides or hydrated oxides of metal elements such as aluminum and titanium and then drying the mixed metal hydroxides or hydrated oxides.

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 disclosure concerns a process for the manufacture of aluminium zirconium halohydrate having an aluminium:zirconium molar ratio of from 2:1 to 7:1 and having a metal:chlorine molar ratio of from 0.9:1 to 2.1:1. Metallic aluminium is dissolved in an aqueous starting solution comprising an oxyhalide, hydroxyhalide or carbonate of zirconium and an aluminium halide or basic aluminium halide, which solution is heated at about 50.degree. C. to 105.degree. C. The solution of the final aluminium zirconium halohydrate has a concentration of metal of 0.5 to 2.3 moles/kg and a size exclusion chromatogram of which the Band III proporition is at least 20%.

Abstract: Aluminum zirconium hydroxy halide glycinate complex and a method of its preparation is disclosed having an empirical formula:Al.sub.2 (OH).sub.6-y.sup.X.sub.y ZrO(OH).sub.x Cl.sub.2-x /Neutral Amino Acidwherein x has a numerical value of 0 to 1.5, y has a numerical value of 0.7 to 3.0, X is chlorine, bromine or iodine, and whose polymer distribution as characterized by a size exclusion chromatograph is:(a) a peak height ratio of peak 4 to peak 3 of 0.5 to 1.8:1, and(b) peaks (1+2) contain less than 4% of the polymer distribution by weight.

Abstract: The zinc and ammonia values in solutions containing zinc chloride or zinc monoammine chloride and ammonium chloride can be recovered by adding ammonia to a pH of about 5.5 to about 8.5 and separating the precipitated zinc diammine chloride from the residual aqueous solution of ammonium chloride. The zinc diammine chloride can be used as is or further converted to anhydrous zinc chloride and ammonia and the aqueous solution of ammonium chloride can be used as is or basified to recover the ammonia.

Abstract: A process for producing acidic boratozirconium chloride sols which comprises: reacting a zirconium compound with a boron compound in molar ratios of B/Zr of 0.3-1.2 together with a compound of a metal M, the metal M being selected from the group consisting of divalent, trivalent, tetravalent and pentavalent metals in molar ratios of M/Zr of about 0.01-1 in water in the presence of chloride ions in molar ratios of Cl/Zr of not less than about 1.The acidic boratozirconium chloride sol may be converted to basic boratozirconium sols by reacting the acidic sol with a basic carbonate compound such as ammonium carbonate.The sols, either acidic or basic, are readily gelled by contact with a dehydration solvent such as methanol or actone.The gel is calcined at relatively low temperatures to provide zirconia which is either very pure or stabilized in varied degrees.

Abstract: A continuous method for preparing silane and a co-product by reacting a metal hydride such as NaAlH.sub.4 with a silicon halide such as SiF.sub.4. The method involves a reactor loop comprising a primary reactor, a secondary reactor and a separation zone. Most of the metal hydride is reacted in the first reactor to which it is added in a substantially constant rate. The remainder of the hydride is reacted in the secondary reactor, in which all or substantially all of the silicon halide is added. The rate of silicon halide addition is governed by feed back from the reaction in the secondary reactor, (.rarw.T so that stoichiometric or substantially stoichiometric operation is achieved. This conserves resources, provides improved co-product and reduces costs.

Abstract: A water-insoluble pigment comprising a complex of an anion exchange material with a layered crystal structure and a water-soluble dye is disclosed. The anion exchange material may be represented by the general formula[M.sup.+2 Q.sup.+3 (OH).sub.5-x ](A.sup.-1).sub.d (A.sup.-2).sub.e (A.sup.-3).sub.f (A.sup.-4).sub.g.nH.sub.2 Owhere M is a metal element or elements each with a positive valence of 2; Q is a metal element or elements each with a positive valence of 3; A.sup.-1, A.sup.-2, A.sup.-3, and A.sup.-4 are each one or more exchangeable anions each having a negative valence of 1, 2, 3, and 4, respectively; and n, x, d, e, f and g are real numbers greater than or equal to zero and satisfy the following:0<x.ltoreq.1d+2e+3f+4g=x0.ltoreq.n.ltoreq.

Abstract: A series of chemically synthesized compounds known as metal mercury iodides or metal tetraiodomercurates having use as infrared detectors are made by reacting potassium tetraiodomercurate(II) with monovalent metal nitrates or iodides, such as thallium(I), indium(I) or copper(I) nitrates. In the case of gold, the gold(I) iodide is used because the nitrate is not known. The precipitated metal (thallium, indium, copper, gold, etc.) tetraiodomercurate is then filtered, dried, and purified (recrystallized) and pressed into a disk under high pressure. Alternatively, the material can be grown as a large crystal by zone melt fusion methods.

Abstract: The present invention relates to [Mg.sub.2 X.sub.3 (Ether)y].sup.+ [AlH.sub.4 ].sup.- in whichX is halogen,ether is an aliphatic or cyclic ether, andy is from 0 to 6.

Abstract: Silicon halides and silicon hydrohalides, such as SiCl.sub.4, SiBr.sub.4, and SiHCl.sub.3 react with alkali metal aluminum hydrides such as NaAlH.sub.4 and LiAlH.sub.4 in the presence of a hydrocarbon reaction medium; e.g., toluene, and a tetraalkyl ammonium salt, and in the substantial absence of an ether, to produce silane and a metal aluminum halide co-product which is not tightly complexed to an organic substance.

Abstract: A water-insoluble pigment comprising a complex of a water-insoluble inorganic substrate exhibiting anion exchange properties, a water-soluble dye, and an anionic amphipathic material is disclosed.

Abstract: A water-insoluble pigment comprising a complex of an inorganic water-insoluble anion exchange material and a water-soluble dye is disclosed. The anion exchange material may be represented by the general formula:[M.sub.1-x.sup.a Q.sub.x.sup.a+1 O.sub.y (OH).sub.z ](A.sup.-1).sub.d (A.sup.-2).sub.e (A.sup.-3).sub.f (A.sup.-4).sub.g.nH.sub.2 Owherein M is a metal element or elements each with a positive valence of a; Q is a metal element or elements each with a positive valence of a+1; a is 2, 3, 4 or 5; A.sup.-1, A.sup.-2, A.sup.-3, and A.sup.-4 are each one or more exchangeable anions each having a negative valence of 1, 2, 3 and 4, respectively; x is 0<x.ltoreq.0.5; and n, y, z, d, e, f, and g are real numbers greater than or equal to zero and satisfy the following:2y+z=a0<d+2e+3f+4g.ltoreq.x0.ltoreq.n.ltoreq.10provided that when y=0, a is not equal to 2.

Abstract: A water-insoluble pigment comprising a complex of an anion exchange material with a layered crystal structure and a water-soluble dye is disclosed. The anion exchange material may be represented by the general formula:[M.sub.x.sup.+1 Q.sub.y.sup.+2.Al(OH).sub.3 ](A.sup.-1).sub.d (A.sup.-2).sub.e (A.sup.-3).sub.f (A.sup.-4).sub.g.nH.sub.2 Owhere M is a metal element or elements each with a positive valence of 1; Q is a metal element or elements each with a positive valence of 2; A.sup.-1, A.sup.-2, A.sup.-3, and A.sup.-4 are each one or more exchangeable anions each having a negative valence of 1, 2, 3, and 4 respectively; and n, x, y, d, e, f, and g are real numbers greater than or equal to zero and satisfy the following:0<x+2y.ltoreq.1d+2e+3f+4g=x+2y0.ltoreq.n.ltoreq.

Abstract: 1,2-dichlorobenzene is isomerized to 1,4-dichlorobenzene in the presence of a catalyst comprising (a) at least one of AlCl.sub.3 and AlBr.sub.3 and (b) at least one of iodine, alkaline earth metal halides and sulfates and lanthanide halides. Benzene and/or dichlorobenzene is chlorinated with free chlorine in the presence of a catalyst composition comprising (a) at least one suitable metal halide (preferably AlCl.sub.3, SbCl.sub.5 or FeCl.sub.3) and (b) free iodine and/or at least one organic iodo-compound (preferably methyl iodide of p-iodochlorobenzene), so as to obtain a reaction product comprising 1,4-dichlorobenzene. A preferred catalyst composition comprises (a) at least one of AlCl.sub.3 and AlBr.sub.3, (b) free iodine and (c) at least one of alkaline earth metal halides, alkaline earth metal sulfates and lanthanide halides.

Abstract: A thick layer of CsI(Na) is heated to or slightly below its melting point. The CsI(Na) is held at that temperature for 7 to 10 hours and is cooled to room temperature, preferably in two steps. The resulting scintillation crystal is translucent or transparent.

Abstract: H.sub.2 S:CuAlCl.sub.4 and 2 H.sub.2 S:CuAlCl.sub.4 are complex addition compounds which may be prepared by contacting CuAlCl.sub.4 with gaseous H.sub.2 S at partial pressures of 0.1 to 1.0 atma and temperatures of 20.degree.-60.degree. C. These new compounds are useful in processes to separate hydrogen sulfide from gaseous mixtures and to prepare pure hydrogen sulfide. Complexation can be accomplished by using CuAlCl.sub.4 in the solid state, in solution or in a slurry. H.sub.2 S is recovered by subjecting the complex addition compounds to some combination of temperature and hydrogen sulfide partial pressure as to break up the complexes and to evolve the hydrogen sulfide content of the complex as a gas stream.

Abstract: Chlorine may be recovered from residues from the fluidized bed chlorination of iron-containing metalliferous oxidic materials, such as ilmenite, bauxite, chromite, wolframite, scheelite, tantalite or columbite, the residues containing condensed iron chloride and blow-over bed solids, by heating the residue to revolatalize the iron chloride and reacting it with oxygen. The quantity of iron chloride in the oxidic material is controlled relative to the quantity of blow-over carbon so that the quantity of carbon is sufficient on combustion to provide the required heat but is insufficient to cause undue dilution of the chlorine produced by virtue of its combustion products. Chlorine of a concentration suitable for direct recycle to a chlorination process, e.g. of 30% to 50% volume concentration is produced.

Abstract: The present invention is directed to a new and useful group of calcium, zinc and magnesium flocculating agents which may be beneficially utilized to treat and purify waste water and/or other waste liquids resulting from a variety of industrial processes. The general ion free formula of these inorganic flocculating agents is represented as follows:(Me.sub.2 O.sub.3).sub.m.sup..cndot. (Me.sub.2 O.sub.3 Cl).sub.(m+z).sup..cndot. (MeO).sub.n.sup..cndot. (SiO.sub.2).sub.t.sup..cndot. (SO.sub.4).sub.yThese flocculating agents may also be represented by the theoretical formula of:Me.sub.n.sup.II Me.sub.o.sup.II Me.sub.m.sup.III (OH).sub.p (SiO.sub.2).sub.t.sup..cndot. (Aci).sub.z (SO.sub.4).sub.ywhere:(a) Me.sub.n.sup.II is selected from the divalent cationic group consisting of: (1) Ca.sup.2+, (2) Mg.sup.2+ and (3) Ca.sup.2+ and Mg.sup.2+ ;(b) Me.sub.o.sup.II is divalent cationic Fe.sup.2+ ;(c) Me.sub.m.sup.III is selected form the trivalent cationic group consisting of: (1) Al.sup.3+, (2) Fe.sup.3+ and (3) Al.sup.

Abstract: Cuprous chloride, which is contained in a reduced leach solution or pregnant liquor, can be recovered as a complex salt of alkali metal chloride, such as potassium chloride, or alkaline earth metal chloride or ammonium chloride. The salts are produced by oxidation of a copper ore, such as chalcopyrite, with ferric chloride and cupric chloride, and after removal of insolubles, by adding sufficient metallic copper to the solution to reduce cupric ions to cuprous ions so as to provide a solution containing 1.5 to 2.5 molal potassium chloride, or other metal or ammonium chloride, and cooling the resultant saturated solution to precipitate the potassium chloride-cuprous chloride complex salts and recovering the complex salts. Also provided as a method for recovery of pure copper metal by electrolysis of solutions derived from the complex salts wherein the impurities are diverted to an anode loop which is separated from the cathode loop by a diaphragm.

Abstract: Cuprous chloride, which is contained in a reduced leach solution or pregnant liquor, can be recovered as a complex salt of alkali metal chloride, such as potassium chloride, or alkaline earth metal chloride or ammonium chloride. The salts are produced by oxidation of a copper ore, such as chalcopyrite, with ferric chloride and cupric chloride, and after removal of insolubles, by adding sufficient metallic copper to the solution to reduce cupric ions to cuprous ions so as to provide a solution containing 1.5 to 2.5 molal potassium chloride, or other metal or ammonium chloride, and cooling the resultant saturated solution to precipitate the potassium chloride-cuprous chloride complex salts and recovering the complex salts. Also provided as a method for recovery of pure copper metal by electrolysis of solutions derived from the complex salts wherein the impurities are diverted to an anode loop which is separated from the cathode loop by a diaphragm.

Abstract: An X-ray imaging system includes a phosphor that exhibits a fast-acting photoluminescent response both in luminescing upon X-ray stimulation and ceasing to luminesce upon cessation of X-ray stimulation. The phosphor has the general formula A.sub.2 MX.sub.6 wherein A is selected from Cs, Rb, Na and K; M is selected from Ti, Zr, Hf, Te and Sn; and X is selected from Cl and Br. In one form the phosphor has a purity with respect to naturally-occurring impurities of at least about 98.0 percent (by weight) and is sufficiently deficient of luminescent activators effective only at very low temperatures that the phosphor luminesces at higher temperatures.

Abstract: Aqueous basic polyaluminum-iron halide solutions, useful as coagulants in waste water treatment are disclosed. The polyaluminum-iron halide solution is prepared by reacting an aqueous polyaluminum halide solution with one or more members of the group consisting of ferrous halide and ferric halide resulting in a solution containing a concentration of metal ions ranging from about 1.35 to 4.5 mol/liter as a dissolved salt of the formulaAl.sub.1-x Fe.sub.x.sup.III Fe.sub.y.sup.II (OH).sub.3+2y-z Hal.sub.zwherein Hal is chlorine, bromine, iodine or mixtures thereof; (x+y)(1-x) is about 0.2 to 1.5; (3+2y-z)(3+2y) is about 0.24 to 0.67; and z is less than 3+2y wherein x/y is about 0 to 1. Alternatively, the coagulant solution is prepared by reacting an aqueous aluminum halide solution or low basic polyaluminum halide solution with iron. Preferably the halide employed is chloride.

Abstract: A pigment for a color-changing heat indicator comprising a product obtained by interaction of an aqueous solution containing ions of copper and mercury with an aqueous solution of a nitrogen-containing organic compound: an amide of carbonic acid, an amide of thiocarbonic acid, a tertiary amine to give a reaction mixture which is reacted with an aqueous solution containing ions of iodine at an atomic ratio of copper:mercury:iodine equal to 2:1.5:3-5 and an amount of the nitrogen-containing organic compound equal to 0.8-8% of the total content of copper and mercury; the pigment has its critical temperature of from 38.degree. to 70.degree. C. and a heat-resistance of from 160.degree. to 180.degree. C.

Abstract: Disclosed is an adduct of the formula 4Na.sub.2 SO.sub.4.2H.sub.2 O.sub.2.KCl and a process for the preparation of this adduct by crystallizing the adduct out of a suspension containing from about 100 to 900 g of hydrogen peroxide per liter of solution and a quantity of sodium sulphate and potassium chloride which exceeds the saturation concentration of the adduct at the crystallization temperature, whereby the weight ratio of sodium sulphate to potassium chloride is in the range of from about 2:1 to 12:1. A continuous process is also disclosed for producing the adduct.

Abstract: Novel sulfide, polysulfide, selenide and polyselenide compositions are provided which are useful as ionic conducting solid electrolytes. Electrical energy storage devices utilizing such electrolytes are also provided.

Abstract: A method is disclosed for preventing the condensation of aluminum chloride (AlCl.sub.3) in a fractional distillation column which is operated to separate a fraction which does not include AlCl.sub.3 from a mixture containing AlCl.sub.3 and other metal chlorides and which is operated at temperatures which include the sublimation or melting points of AlCl.sub.3 at the operating pressure of the column. According to this method, titanium tetrachloride (TiCl.sub.4) is maintained in the column in an amount at least as great, by weight, as the amount of AlCl.sub.3 contained in the mixture.

Abstract: Chlorofluoroferrates(II,III) are manufactured by fusing alkali metal halides or ammonium halides with an iron(III) halide and metallic iron. The starting materials used are, in particular, (a) an alkali metal chloride or ammonium chloride, (b) an alkali metal fluoride or ammonium fluoride, (c) anhydrous iron(III) chloride and (d) iron powder. The reaction is carried out a temperature of 300.degree. to 900.degree. C. The chlorofluoroferrates, which have a markedly lower hygroscopicity compared with customary chloroferrates, are particularly suitable for use as active fillers for grinding wheels.

Abstract: A method for producing alumina from a material containing alumina values via a chlorination step which process comprises the steps of:(A) dehydrating the material, if necessary, at a temperature of between about 500 and about 1300.degree. K.;(B) chlorinating the product of step (A) in the presence of chlorine and carbon at a temperature below about 1200.degree. K. and under conditions which provide chlorination of a majority of the iron present in the clay without substantial chlorination of titania values which may be present therein with concommittant formation of an iron chloride cloud above the surface of the chlorination reaction mixture;(C) introducing oxygen into the iron chloride cloud under conditions to cause oxidation of a majority of the iron chloride contained in the cloud;(D) chlorinating the non-gaseous product of step (B) in the presence of chlorine and carbon at a temperature above about 1300.degree. K.

Abstract: There is described a method for producing alumina from a material containing alumina values via a chlorination step which process comprises the steps of:(A) dehydrating the material, if necessary, at a temperature of between about 500 and about 1300.degree. K;(B) chlorinating the product of step (A) in the presence of chlorine and carbon at a temperature below about 1200.degree. K and under conditions which provide chlorination of a majority of the iron present in the clay without substantial chlorination of titania values which may be present therein with concommittant formation of an iron chloride cloud above the surface of the chlorination reaction mixture;(C) introducing oxygen into the iron chloride cloud under conditions to cause oxidation of a majority of the iron chloride contained in the cloud;(D) chlorinating the non-gaseous product of step (B) in the presence of chlorine and carbon at a temperature above about 1300.degree.

Abstract: Fibrous hydrotalcites having a hexagonal needle-like crystal structure. The fibrous hydrotalcites are produced by contacting a basic magnesium compound having a needle-like crystal structure and expressed by the following formula (2)Mg(OH).sub.2-n'x.sbsb.2 A.sub.x.sbsb.2.sup.n'.spsp.-.m.sub.2 H.sub.2 O (2)wherein A.sup.n'.spsp.- represents a monovalent or divalent anion, n' is 1 or 2, and x.sub.2 and m.sub.2 are numbers satisfying the following conditions,0.2.ltoreq.x.sub.2 .ltoreq.0.5,O.ltoreq.m.sub.2 .ltoreq.2,with a compound capable of providing a trivalent metal cation and being soluble in a liquid reaction medium which is chemically inert and is a non-solvent for the basic magnesium compound, the contacting being carried out in said liquid reaction medium under conditions which do not cause a loss of the needle-like crystal form of the basic magnesium compound, while maintaining the ratio of M.sup.3+ to the sum of Mg and M.sup.3+ at O<M.sup.3+ /(Mg+M.sup.3+).ltoreq.0.

Abstract: A method for producing aluminum chloride suitable for direct introduction into an aluminum chloride reduction cell by treatment of the gas stream emerging from an aluminum value source chlorination process comprising the steps of:1. reducing and condensing iron chloride in one or more iron chloride condensation stages;2. absorbing the aluminum chloride contained in the gas stream under high temperature conditions with an alkali chloride or alkali chloride mixture to form an ionic alkali chloride-aluminum chloride complex; and3. selectively condensing the chlorides from the product by step (2) to produce a purified aluminum chloride-alkali chloride complex suitable for direct introduction into an aluminum chloride reduction cell.

Abstract: Metal chlorides such as aluminum chloride (AlCl.sub.3) are separated from a mixture containing metal chlorides including AlCl.sub.3 and ferric chloride (FeCl.sub.3). In order to effect this separation, the mixture is subjected to a fractional distillation process utilizing an array of distillation columns. According to this process, the mixture is introduced into a first distillation column which is operated at temperatures and pressures sufficient to separate FeCl.sub.3 from the mixture while avoiding the formation of a solid solution of FeCl.sub.3 and AlCl.sub.3 within the column. At least one additional distillation column is then employed to separate metal chlorides from the remaining mixture from the first column.

Abstract: Cuprous chloride is produced from the complex salt, 2KCl.CuCl, obtained as a by-product in the copper industry where chalcopyrite is decomposed in the presence of potassium chloride, by a series of steps involving reaction of an aqueous solution of the complex salt of potassium chloride and cuprous chloride with ammonia, separating the resulting solid potassium chloride from a solution containing cuprous chloride and ammonia, removing the ammonia from the solution to cause precipitation of the cuprous chloride and recovering solid cuprous chloride. Ammonia may then be recycled to the solution from which the cuprous chloride is removed and to which additional complex salt is added to repeat the cycle.

Abstract: A process for preparing cis - Pt (NH.sub.3).sub.2 I.sub.2 from K.sub.2 PtI.sub.4 by adding NH.sub.4 OH under controlled conditions of temperature and pH.

Abstract: A method for the production of reduction cell grade alumina from alkali metal/aluminum chloride complexes comprising the steps of:A. reacting the alkali metal/aluminum chloride complexes with oxygen in a three phase fluidized bed comprising:(I) as a solid phase, particles or pebbles of alumina of at least about 1/16" in average diameter;(II) as a gaseous phase oxygen fed at a rate to provide a fluidizing gas velocity above about 8'/sec.; and(III) as a liquid phase coating the particles of alumina an alkali metal/aluminum chloride complexes; andB. separating the product solids from the gases exiting the fluidized bed.

Abstract: The chloride ion and carbonate ion concentrations of a strongly alkaline solution can be reduced by the process of mixing sodium aluminosilicate into the solution, heating the resulting solution to a temperature of at least 90 degrees Celsius to form a sodalite type product, and filtering the sodalite type product from the solution.

Abstract: Cobalt is recovered from byproduct streams from a basic process by contacting the byproduct streams with aluminum metal for a sufficient period of time to produce cobalt metal as a precipitate. The basic process is the type wherein cobalt ions in solution are complexed with ammonia in the presence of halide ions to form an ammine halide solution from which a cobalt containing precipitate is separated. The precipitate is subsequently reduced to form a cobalt metal powder.

Abstract: A process is provided for preparing cis-Pt(NH.sub.3).sub.2 Cl.sub.2 and intermediates. As a step in the process the intermediate cis-Pt(NH.sub.3).sub.2 I.sub.2 is prepared from K.sub.2 PtI.sub.4 by adding NH.sub.4 OH under controlled conditions of temperature and pH. The cis-Pt(NH.sub.3).sub.2 Cl.sub.2 is provided in high yield and purity.

Abstract: In grinding disks, toxic lead chloride and antimony sulfide may be replaced by non-toxic alkali metal chloroferrates (II,III) produced by melting together alkali metal chloride, anhydrous ferric chloride and iron powder.

Abstract: Magnesium values are selectively recovered from salt brines, even salt brines which contain competing ions such as Li.sup.+, Ca.sup.++, and Sr.sup.++, by contacting the brine with an anion exchange resin which has dispersed therein a microcrystalline structure of the formula MgX.sub.2.2Al(OH).sub.3, where X is a halide.