Potassium aluminate

Magaldrate is prepared by precipitation from aqueous solutions of sodium or potassium aluminate and a magnesium salt under controlled conditions of concentration and temperature. The precipitated product is collected by filtration, washed to remove soluble by-products, and dried. 

Tonerde-hydrat, n. hydrate of alumina (aluminum hydroxide). -kali, n. potassium aluminate. -lack, m. alumina lake. -metaU, n. aluminum, -natron, n. sodium aluminate. -prMparat, n. alumina preparation, tonerderelch, a, rich in alumina, aluminous. Tonerde-galz, n. aluminum salt, -stein, m, alumina brick, -sulfat, n, sulfate of alumina... 

Serpek A nitrogen fixation process using aluminum nitride. A mixture of bauxite and coke is heated in nitrogen at 1,800°C to produce aluminum nitride this yields ammonia on hydrolysis by boiling with aqueous potassium aluminate ... 

Samples were analyzed for unburned aluminum using the eudiometer method [21]. In this method, the sample is mixed with a potassium hydroxide (KOH) solution. KOH reacts with aluminum to form potassium aluminate according to the reaction... 

Initially, there are several types of micas which have similar properties but which have different physical and chemical origins. Illite, the low potassium aluminous mica-like mineral ( 10 X, non-expandable structure upon glycollation) can form diagenetically (Velde and Hower,... 

The reagents used were sodium silicate, sodium aluminate, and potassium silicate (all from H W). Potassium aluminate solution was pre-... 

The persistent pyrethroids such as permethrin, cypermethrin, cyfluthrin, and fenvalerate are effective mothproofing agents when applied as spot treatments from ready to use (RTU) formulations. Sodium fluosilicate [16893-85-9] is an effective mothproofing agent used at 0.5 to 0.7% in water solution with 0.3% potassium aluminate and 0.03% oxalic acid, and applied to fabrics by spraying or dipping. It is not removed by dry cleaning. 

An example of high temperature nitrogen reactions is the Serpek process that produces aluminum nitride1. In this process bauxite and coke are mixed and heated in a nitrogen atmosphere at 1,800°C to produce aluminum nitride. Boiling the aluminum nitride with potassium aluminate then produces ammonia ... 

The only phase containing essential alkali but not essential SO3 known to occur in Portland cement clinkers in more than trace amounts is the orthorhombic aluminate phase described in Section 1.4. Trace amounts of alkali carbonates (P2) or potassium aluminate (F4) have been reported to occur in some clinkers, and some other alkali phases are formed as intermediates or deposits. 

For most normal clinker compositions, the major sulphate phase will be aphthitalite with its maximum K/Na ratio of 3.0, with minor amounts of KS or C2KS3 or both only with unusually low values of K/Na in the clinker would one expect NS to be formed. It is only possible to estimate a maximum value for the content of anhydrite, based on the amount of SO3 that is not water soluble this will often be zero, as in the example given above. Anhydrite may, however, be determined by QXDA (Section 4.3.2). Rarely, the amount of water-soluble SO3 is insufficient to balance that of water-soluble alkalis this has been attributed to the presence of traces of alkali carbonates (P2), or of potassium oxide and potassium aluminate (KA) (F4). 

The aluminum derivative of ethyl acetoacetate has been prepared by the reaction of aluminum ethoxide with ethyl acetoacetate, by the reaction of amalgamated aluminum metal with ethyl acetoacetate, and by the reaction of potassium aluminate with ethyl acetoacetate. The present synthesis is a modification of the first method. 

P.F. McMillan, B. Piriou, and A. Navrotsky, A Raman spectroscopic study of glasses along the join silica-calcium aluminate, silica-sodium aluminate, and silica-potassium aluminate. Geochim. Cosmochim. Acta 46, pp. 2021-2037 (1982). 

The reaction phases are similar for the 70% alumina brick exposed to K20 however, corundum and potassium aluminate are also produced by potassia reaction. 

Attempts to prepare AI(SiPh3)j from KSiPhj and AlClj fail. In liq NH3 no compound with an Al—Si bond can be isolated. In tetrahydrofuran (THF) a potassium aluminate complex is obtained in 50% yield ... 

KAI(S04)2 3H20 POTASSIUM ALUMIN. SULFATE 3-HYDRATE 884 LaAs04 LANTHANUM ARSENATE 927... 

KAI(S04)2 12H20 POTASSIUM ALUMIN. SULFATE 12-HYDR. 885 LaBr3 LANTHANUM BROMIDE 927... 

Aluminates are for the most part crystalline, soluble compounds, obtained by the action of metallic oxids or hydroxids upon alumina. Potassium aluminate, KaAlaOa-fSAq, is formed by dissolving recently precipitated aluminium hydroxid in potash solution. It forms white crystals very soluble in HaO, insoluble in alcohol caustic and alkaline. By a large quantity of HaO it is decomposed into aluminium hydroxid, and a more alkaline salt, KgAltOa. 

Only monopotassium oxohydroxoaluminate, KgO AlgOa 3 HgO = Kg[AlgO(OH)6], is obtained from a potassium aluminate solution. 

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