Niter

The most common compound is sodium chloride, but it occurs in many other minerals, such as soda niter, cryolite, amphibole, zeolite, etc. 

Selenium is found in a few rare minerals such as crooksite and clausthalite. In years past it has been obtained from flue dusts remaining from processing copper sulfide ores, but the anode metal from electrolytic copper refineries now provide the source of most of the world s selenium. Selenium is recovered by roasting the muds with soda or sulfuric acid, or by smelting them with soda and niter. 

Nantokite, see Copper(I) chloride Natron, see Sodium carbonate Naumannite, see Silver selenide Neutral verdigris, see Copper(H) acetate Nitre (niter), see Potassium nitrate Nitric oxide, see Nitrogen(II) oxide Nitrobarite, see Barium nitrate Nitromagnesite, see Magnesium nitrate 6-water Nitroprusside, see Sodium pentacyanonitrosylfer-rate(II) 2-water... 

The Harris softening process (20) (Fig. 13) depends on the interaction of lead, niter [7631-99-4] NaNO, sodium hydroxide, and the impurities ... 

The niter and fresh caustic soda, required to maintain the fluidity of the salt bath in the reactor chamber, are added gradually. When the color of the saturated salts turns from a dark gray to white, the impurity metals are at their highest state of oxidation, and the lead content of the spent salts is very low. In a modification, the arsenic and tin are selectively removed as sodium arsenate and sodium stannate, followed by the removal of antimony as sodium antimonate. 

The lead contains residual calcium and magnesium that must be removed by chlorination or treatment with caustic and niter. The molten lead is pumped or laundered to the casting kettles in which it is again treated with caustic and niter prior to mol ding, After a final drossing, the refined lead is cast into 45-kg pigs or 1- and 2-t blocks. 

They remark that the yield might havu been much more, say J per cent, to I 2,5 per cent., had the distillation been carried oat with sbao-lutely fresh grass immediately niter it was cut, instead af with grass which must have lost some of ils rolatilc oil during transit Lo linmbay,... 

Salpeter-ather, m. nitric ether (ethyl nitrate), -bakterien, n.pl. nitrifying bacteria, -bil-dung, /. nitrification, -blumen, f.pl. niter efflorescence, -damp/, -dupst, m. nitrous fumes, -erde, /. nitrous earth, -erzeugung, /. niter production nitrification. 

Salpeter-frass, m. corrosion by niter, -gas, n. nitrous oxide nitric oxide. 

Salpetergeist, m. spirit of niter (old name for nitric acid). — verstisster —, see versiissen. 

Salpeter-grube, /. saltpeter mine, -glitemesser, m. nitrometer, -hafen, m. niter pot. 

Salpeter-luft,/. nitrogen (old name), -messer, m. nitrometer, -milchsiure, /. lactic acid nitrate, -papier, n. niter paper, nitrous paper, -plantage, /. saltpeter plantation, -probe, /. saltpeter test, nitrate test saltpeter sample. 

Salpeter-schwefels ure, /. nitrosulfuric acid (a mixture) nitrosylsulfuric acid, -siederei, /. saltpeter works, -stkrkemehl, n. nitrated starch, -stoff, m. nitrogen, -strauch, m. niter bush Nitraria). -ung,/. nitrification, -verbindung, /. nitrate. -waC4)ge, /. nitrometer. 

Sodium Nitrate (Chile Saltpeter, Cubic or Soda Niter, Caliche, Nitratine). NaN03, mw 85.01,... 

Na nitrate occurs native in large deposits in the rainless districts of Chile, hence it is often called Chile saltpeter or Chile niter . The Na nitrate in the deposits constitutes from 20 to 50% in a distinct stratum of earth known as caliche . The caliche is crushed and lixiviated in large tanks of w heated by steam. The settled soln is run off to crystallizers, where crude nitrate separates, the mother liquors being run back to the lixiviators. The crysts are washed with a little w and dried in the sun they contain 95—96% Na nitrate (Ref 1)... 

Antifoams to reduce the risk of carryover employed emulsions of castor oil and similar substances. Caustic embrittlement was avoided by the use of quebracho tannins, chile niter (sodium nitrate), and salt cake (sodium sulfate), which was later discredited as an inhibitor. 

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