Potassium nitrite KNO

Sodium nitrite, NaNOn, and potassium nitrite, KNO.. can be made also by decomposing die nitrates by heat ... 

Cobaltic Potassium Nitrite, Hexakis(nitrito-N)co-baltateiJ—) tripotassium potassium hexanitrocobaltateOll) potassium cobaltinitrite potassium nitrocobaltate(lll) cobalt yellow Fischer s yellow C.l. Pigment Yellow 40 C.I. 77357. CoKjNjOmol wt 452.29. Co 13.03%, K 25.93%, N 18.58%, 0 42.45%. K3Co(N02)6. incorrectly called Indian yellow". Prepd by addition of KNO, to a solution of a Co salt Salyer, Sweet, Anal. Chem. 32, 548 (1962). 

The highly exothermic nature of the butane-to-maleic anhydride reaction and the principal by-product reactions require substantial heat removal from the reactor. Thus the reaction is carried out in what is effectively a large multitubular heat exchanger which circulates a mixture of 53% potassium nitrate [7757-79-1/, KNO 40% sodium nitrite [7632-00-0], NaN02 and 7% sodium nitrate [7631-99-4], NaNO. Reaction tube diameters are kept at a minimum 25—30 mm in outside diameter to faciUtate heat removal. Reactor tube lengths are between 3 and 6 meters. The exothermic heat of reaction is removed from the salt mixture by the production of steam in an external salt cooler. Reactor temperatures are in the range of 390 to 430°C. Despite the rapid circulation of salt on the shell side of the reactor, catalyst temperatures can be 40 to 60°C higher than the salt temperature. The butane to maleic anhydride reaction typically reaches its maximum efficiency (maximum yield) at about 85% butane conversion. Reported molar yields are typically 50 to 60%. 

Heat Treatment and Heat-Transfer Salts. Mixtures of sodium nitrite, sodium nitrate, and potassium nitrate are used to prepare molten salt baths and heat-transfer media. One of the most widely used eutectic mixtures uses 40% NaN02, 7% NaNO, and 53% KNO [7757-79-1] to give a... 

Cobalt Nitrite Complexes, When KNO is added in excess to a soln of Co(N02)2, i i " fied with AcOH, a yel ppt of potas sium hexa-nitrocobaltiate potassium cobaltinitrite). 

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