Aluminum sodium

The method of obtaining aluminum metal by the electrolysis of alumina dissolved in cryolite was discovered in 1886 by Hall in the U.S. and at about the same time by Heroult in France. Cryolite, a natural ore found in Greenland, is no longer widely used in commercial production, but has been replaced by an artificial mixture of sodium, aluminum, and calcium fluorides. 

Chloroform Aluminum, magnesium, potassium, sodium, aluminum chloride, ethylene, powerful oxidants... 

Compounds containing fluorine and chlorine are also donors to BF3. Aqueous fluoroboric acid and the tetrafluoroborates of metals, nonmetals, and organic radicals represent a large class of compounds in which the fluoride ion is coordinating with trifluoroborane. Representative examples of these compounds are given in Table 5. Coordination compounds of boron trifluoride with the chlorides of sodium, aluminum, iron, copper, 2inc, tin, and lead have been indicated (53) they are probably chlorotrifluoroborates. 

Aluminum Industry. Large amounts of HE are consumed in the production of aluminum fluoride [7784-18-17, AIE, and cryoHte [15096-52-3] (sodium aluminum fluoride), used by the aluminum industry. Both of these compounds are used in the fused alumina bath from which... 

Ca(H2P0 2- Acidic aluminum salts, such as sodium aluminum sulfate, NaAl(S0 2> potassium aluminum sulfate [10043-01-3], KA1(S0 2> ammonium aluminum sulfate, (NH A1(S0 25 aluminum sulfate, Al2(S0 2> added during the preparation of pickles and reUshes to provide the same effect (48). 

Table 6 Hsts the leavening acids and the corresponding rates of reaction. The leavening acids most frequently used iaclude potassium acid tartrate, sodium aluminum sulfate, 5-gluconolactone, and ortho- and pyrophosphates. The phosphates iaclude calcium phosphate [7758-23-8] CaHPO, sodium aluminum phosphate, and sodium acid pyrophosphate (66).

Sodium Aluminum Hydride. Sodium aluminum hydride can be prepared from NaH,... 

Sodium Aluminum Sulfate. Sodium aluminum sulfate [7784-28-3], NaAl(SO 2 12H20, known as sodium alum, is a colorless crystal having an asttingent taste mp 61°C and sp gr 1.675. It is the most water soluble alum 75 g per 100 mL H2O at 20°C (8). It is soluble ia dilute acid and iasoluble ia alcohol. 

In the United States, sodium aluminum sulfate is used as a leavening agent ia halting appHcations. Sodium aluminum sulfate, food grade, sold at 1.17/kginl990. 

A number of acidic phosphates which vary in their rate of reaction are available for use in a wide variety of bakery appHcations. These acids, which include monocalcium phosphate, sodium aluminum phosphate, and sodium acid pyrophosphate, release carbon dioxide at a controlled rate to give a certain fraction prior to baking the remaining fraction is released at a specific time during baking. Controlled releasing of carbon dioxide at the time it is needed can also be achieved by a mixture of different types of leavening acids. 

Sodium Aluminum Sulfate (SAS). Sodium aluminum sulfate is a dehydrated double salt of aluminum and sodium sulfate. It does not react with baking soda in cold, but in the heat of oven 1 mol of SAS produces 6 mol of carbon dioxide from reacting with baking soda. Historically, SAS was one of the first materials used to Hberate carbon dioxide from baking soda. Today its primary use is in household baking powder production. It is used either alone or in combination with MCP. SAS is not recommended for use in prepared mixes due to its lack of compatibiHty with other ingredients in a mix. 

DKP = dipotassium phosphate Poly = polyphosphate and SALP = sodium aluminum phosphate. Other terms may be found in the text. 

Sodium aluminum. sulfate. This product is now being successfully calcined in rotary Idlns. In this process, the salt cake is broken up just before it enters the Idln. Calcination is for the purpose of driving off the combined water (45 percent) and sulfuric acid (3 percent). Temperatures employed are approximately 800 K. 

A 50-galIon stirred pot reactor was used for the production of sodium aluminum hydride, which reacts exothermally with water with enough heat to cause the hydrogen that is released to explode. 

He did not put on the fire gear and proceeded to open the vessel and hose it out with a fire hose. An explosion resulted when water f dislodged crusted-over sodium aluminum hydride trapped in a nozzle. The worker was burned, requiring a two-week hospital stay and several months of recuperation. 

The primar> uses for hydrogen fluoride in the United States arc in the manufacture of chlorofluorocarbons, aluminum fluoride, sodium aluminum fluoride (ciyolitc). md uranium tetrafluoride, and in petroleum alkylation. 

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