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Sodium hexafluorosilicate

Chemical Designations - Synonyms Salufer Sodium fluosilicate Sodium hexafluorosilicate Chemical Formula Na SiF. ... [Pg.359]

The fluoride portion is either removed as gaseous silicon tetrafluoride, if silica is added, or as the sparingly soluble sodium hexafluorosilicate, which remains with the calcium sulfate. [Pg.90]

To study these reactions use a freshly prepared 0-Im solution of sodium hexafluorosilicate. [Pg.353]

Sodium hexafluorosilicate (0- 1m). Dissolve 18-8 g sodium hexafluorosilicate, Na2[SiF6], in water and dilute to 1 litre. [Pg.584]

The fluoride portion is either removed as gaseous silicon tetrafluoride, if silica is added, or as the sparingly soluble sodium hexafluorosilicate, which remains with the calcium sulfate. There are several variants of the Dorr process, which differ according to the treatment of the calcium sulfate. Some variants produce the dihydrate, gypsum others produce the hemihydrate. The variants also differ in the concentration of the phosphoric acid produced, but it is never more than 43%. The basic process was patented by Lawes in England in 1842, but the presendy used variant was developed by the Dorr-Oliver company in the 1930s. [Pg.111]

Hexafluorosilicates are mainly used as preservatives in wood protection (particularly magnesium hexafluorosilicate). Sodium hexafluorosilicate is used in water fluoridation. [Pg.142]

Sodium Silicofluoride Salufer Sodium Fluosilicate Sodium Hexafluorosilicate ... [Pg.257]

Sodium hexafluorosilicate Phosphonic acid difluorides from phosphonic acid dichlorides... [Pg.177]

Elementary phosphorus is manufactured by reduction of apatite with coke in electric furnaces at a temperature of 1400-1500°C. Quartz is also present in the charge. It reacts with the calcium in apatite and forms a slag of liquid calcium silicate. If the apatite contains fluorine, SiF gas is formed that is passed into water containing soda. The compound formed, sodium hexafluorosilicate Na SiF, is used for fluoridating drinking water. In the process described, white phosphorus is the product. In the world about 1 million tonnes per year are produced. White phosphorus is used to some extent for smoke bombs and incendiary bombs, but most of it is used for the manufacture of phosphoric acid and other chemicals and for preparing red phosphorus for the match industry. [Pg.997]

Silver lodate Silver Monofluoride Silver Nitrate Silver lodate Silver Fluoride Silver Nitrate Sodium Hexafluorosilicate Sodium Hydride Sodium Silicofluoride Sodium Hydride... [Pg.162]

Several molten salts (Carlo Erba 99.995%) were used as electrolyte solvent LiF-KF (51-49mol%), LiF-NaF (60-40 mol%), NaF-KF (40-60 mol%), NaF-MgF2 (78-22 mol%), NaF-CaFj (69-31 mol%) and LiF-CaF2 (80-20 mol%). All the solvents were initially dehydrated by heating under vacuum (7 x 10 atm) from ambient temperature up to their melting point for one week. Silicon ions were introduced into the bath in the form of potassium or sodium hexafluorosilicate (K2SiFg or Na2SiFg Alfa Aesar 99.99%) powder. [Pg.582]

See other pages where Sodium hexafluorosilicate is mentioned: [Pg.120]    [Pg.347]    [Pg.363]    [Pg.469]    [Pg.1290]    [Pg.83]    [Pg.120]    [Pg.31]    [Pg.591]    [Pg.573]    [Pg.1882]    [Pg.304]    [Pg.69]    [Pg.229]    [Pg.1145]    [Pg.378]    [Pg.1087]    [Pg.740]    [Pg.1039]    [Pg.732]    [Pg.1025]    [Pg.332]    [Pg.120]    [Pg.4029]    [Pg.4111]    [Pg.211]    [Pg.281]    [Pg.390]    [Pg.551]    [Pg.716]    [Pg.814]    [Pg.890]   
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See also in sourсe #XX -- [ Pg.362 ]

See also in sourсe #XX -- [ Pg.226 ]

See also in sourсe #XX -- [ Pg.120 ]

See also in sourсe #XX -- [ Pg.226 ]

See also in sourсe #XX -- [ Pg.359 ]

See also in sourсe #XX -- [ Pg.120 ]

See also in sourсe #XX -- [ Pg.17 ]



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Hexafluorosilicates

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