METHOD OF IMPROVING NITRITE SALT COMPOSITIONS FOR USE AS HEAT TRANSFER MEDIUM OR HEAT STORAGE MEDIUM
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United States of America Patent
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Issued Date -
Feb 20, 2014
app pub date -
Aug 16, 2013
filing date -
Aug 17, 2012
priority date (Note) -
Abandoned
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Abstract
Method of maintaining or widening the long-term operating temperature range of a heat transfer medium and/or heat storage medium comprising a nitrite salt composition comprising, as significant constituents, an alkali metal nitrate or an alkaline earth metal nitrate or a mixture of alkali metal nitrate and alkaline earth metal nitrate and in each case an alkali metal nitrite and/or alkaline earth metal nitrite, wherein all or part of the nitrite salt composition is brought into contact with an additive composed of nitrogen and/or noble gases, in each case with elemental oxygen, the latter in an amount in the range from 0 to 20% by volume based on the total amount of the additive in combination with nitrogen oxides and/or compounds which generate nitrogen oxide.
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