ALKALI-METAL-CARBONATE-CONTAINING NITRATE SALT COMPOSITIONS AND USE THEREOF AS HEAT TRANSFER MEDIUM OR HEAT STORAGE MEDIUM

摘要

The present invention, (A) 90 to 99.84% by weight of alkali metal nitrate and optionally alkali metal nitrite, based on the nitrate salt composition; And (B) 0.16 to 10% by weight, based on the nitrate salt composition, (B1) alkali metal oxide, (B2) alkali metal carbonate, (B3) alkali metal oxide or alkali metal carbonate at a temperature of 250 ° C to 600 ° C Alkali metal compounds decomposed into (B4) alkali metal hydroxide MetOH (where Met is lithium, sodium, potassium, rubidium or cesium), (B5) alkali metal peroxide Met ₂ O ₂ (where Met is lithium , Sodium, potassium, rubidium or cesium), and (B6) alkali metal superoxide MetO ₂ (where Met is sodium, potassium, rubidium or cesium). It relates to a nitrate salt composition, comprising as an essential component.