Sulfates, aluminium ammonium

See Ammonium sulfate, etc., above Aluminium Ammonium nitrate Potassium Nitrogen-containing explosives... 

AIH4N08Sz (s) AINH4(S04)2 (s) Aluminium Ammonium Sulfate AIH4NO8S2 (s) AINH4(S04)2 (s)... 

Acrylic resins, activated carbon, adipic acid, alfalfa, alga powder, alumina, aluminium, ammonium chloride, animal feed, anthracite, asbestos Barium chloride, barium sulfate, battery masses, bauxite, bentonite, bitumen, bone meal, borax, brass turnings... 

Basic aluminium ammonium sulfate [81], (NH4)20.3Al203.4S03.xH20 (x = 6 to 8), loses water at about 473 K. Deammination and complete dehydration commences above 673 K, and SO, evolution starts at about 873 K to yield residual AI2O3 which retains traces of SO3. ar-time data fitted the contracting volume equation. 

Small amount of impurities sometimes retard dramatically the crystal growth rate. Chromium(III), for example, suppresses the crystal growth of potassium sulfate(i), ammonium dihydrogen phosphate(2) and ammonium sulfate (5), etc. in aqueous solutions. Other metallic ions, iron(III), aluminium(III) are also effective impurities W... 

During the curing process of a thermosetting adhesive resin, a three-dimensional network is built up. This 5delds an insoluble resin which is no longer thermo-formable. The acid hardening conditions can be adjusted (1) by the addition of a so-called latent hardener (eg, ammonium sulfate or ammonium nitrate), or (2) by the direct addition of acids (maleic acid anhydride, formic acid, phosphoric acid and others) or of acidic substances, which dissociate in water (eg aluminium... 

Urokinase utilized medically is generally purified directly from human urine. It binds to a range of adsorbents, such as silica gel and, especially, kaolin (hydrated aluminium silicate), which can be used initially to concentrate and partially purify the product. It may also be concentrated and partially purified by precipitation using sodium chloride, ammonium sulfate or ethanol as precipi-tants. 

Aluminium, 0048 Ammonium phosphinate, 4554 Barium phosphinate, 0210 f Benzaldehyde, 2731 1,4-Benzenediol, 2333 Bis(hydrazine)tin(II) chloride, 4070 Calcium acetylide, 0585 Calcium phosphinate, 3931 Chromium(II) chloride, 4052 Chromium(II) oxide, 4241 Chromium(II) sulfate, 4244 Copper(I) bromide, 0265 Diacetatotetraaquocobalt, 1780 Diisobutylaluminium hydride, 3082 f 1,2-Dimethylhydrazine, 0955... 

Aluminium, 0048 Ammonium phosphinate, 4549 Barium phosphinate, 0210 f Benzaldehyde, 2727 1,4-Benzenediol, 2326 Bis(hydrazine)tin(II) chloride, 4064 Calcium acetylide, 0582 Calcium phosphinate, 3925 Chromium(II) chloride, 4046 Chromium(II) oxide, 4235 Chromium(II) sulfate, 4238 Copper(I) bromide, 0264 Diacetatotetraaquocobalt, 1774 Diisobutylaluminium hydride, 3076 f 1,2-Dimethylhydrazine, 0951 1,2-Diphenylhydrazine, 3511 Dipotassium phosphinate, 4425 f Ethanedial, 0719 f Formaldehyde, 0415 Formic acid, 0417 Gallium(I) oxide, 4405 Glucose, 2513 f Hydrazine, 4515 Hydroxylamine, 4493 Hydroxylaminium phosphinate, 4550 Hyponitrous acid, 4464 Iron(II) chloride, 4055 Iron(II) hydroxide, 4386 Iron(II) sulfate, 4393 Fead(II) phosphinate, 4526 Fead(II) phosphite, 4530 Fithium dithionite, 4682 Magnesium, 4685 Magnesium phosphinate, 4512 Manganese(II) phosphinate, 4514 f Methylhydrazine, 0500 Phenylhydrazine, 2366 Phosphinic acid, 4498 Phosphonic acid, 4499 Phosphonium iodide, 4510 Potassium, 4640 Potassium hypoborate, 0163... 

Methylenedioxyphenylacetic acid (18.0 g) was added portion wise over 30 minutes to a stirred, ice-cooled suspension of lithium aluminium hydride (4.0 g) in ether (400 ml) and the mixture was stirred at temperature for two hours, quenched by the cautious addition of saturated aqueous ammonium chloride solution and filtered. The filtrate was washed with 10% aqueous sodium carbonate solution, dried over magnesium sulfate and evaporated to give the title compound as a pale yellow oil (15.01 g, 90%), which was characterized by its tH-NMR spectrum. 

A post-column derivatization with subsequent photometric detection has also been developed for the determination of aluminium. Using a mixture of ammonium sulfate and sulfuric acid, aluminium is separated as A1S04+ ion on a cation exchanger. It forms a stable complex with the disodium salt of 4,5-dihydroxy-l,3-benzenedisulfonic acid (Tiron) at pH 6.2 which can be detected at 313 nm. 

Gibson s method 4 is based on the principle that ammonium hydrogen fluoride effects the complete decomposition of beryl at a low temperature, even if the mineral is only coarsely ground. Much of the silica is volatilized as ammonium fluosilicate and the beryllium and aluminium converted first to fluorides, then sulfates. The former is separated by solution in (NH COs. 

Kieselgel 60, Merck 230-400 mesh. Thin-layer chromatography was performed on silica gel (Kieselgel 60 F254, Merck) aluminium-backed plates (0.2 mm thickness) and visualized by UV and/or dipping into a solution of 2.5 g ammonium molybdate and 1 g ceric sulfate in 10 mL sulphuric acid/90 mL water, followed by heating. Purchased from Aldrich Chemical Company, Inc., Milwaukee, WI, USA. 

The first significant step forward was the discovery that water is cooled when salts are dissolved in it, such as common salt (sodium chloride), saltpetre (potassium nitrate), sal-ammoniac (ammonium chloride) or alum (a mixture of aluminium sulfate and potassium sulfate). When the crystals dissolve, the strong bonds between the ions are broken, extracting heat from the surrounding water, so the temperature drops. Adding a mixture of 5 parts ammonium chloride and 5 parts potassium nitrate to 16 parts water at 10 °C causes the temperature of the mixture to drop to about — 12°C, sufficient to freeze a vessel of pure water immersed in it. This phenomenon was first recorded in an Indian poem from the fourth century AD, and described in detail in an Arabic medical textbook from 1242. Another book in Arabic, containing sorbet recipes, appeared at about the same time. 

Aluminium potassium sulfate dodecahydrate Aluminium sulfate hydrate <30% aq. sol n Ammonium acetate sat d aq. sol n Ammonium bicarbonate Ammonium carbonate sat d aq sol n Ammonium chloride sat d aq. sol n Ammonium fluoride 30-70% aq. sol n Ammonium hydrogen fluoride Ammonium nitrate Arsenic trichloride Cadmium oxide solid Calcium chloride 30-70% sat d aq. sol n Cobalt sulfate heptahydrate... 

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