The present invention relates to an aqueous glycol-free heat transfer fluid comprising sebacic acid, benzotriazole, morpholine, and at least one of sodium nitrite and sodium molybdate dihydrate, wherein a sum of concentrations of sodium molybdate dihydrate, sebacic acid, benzotriazole, morpholine, s
The present invention relates to an aqueous glycol-free heat transfer fluid comprising sebacic acid, benzotriazole, morpholine, and at least one of sodium nitrite and sodium molybdate dihydrate, wherein a sum of concentrations of sodium molybdate dihydrate, sebacic acid, benzotriazole, morpholine, sodium nitrite is equal to or less than 1% (w/w). Preferably, the sum of concentrations of sodium molybdate dihydrate, sodium nitrite, sebacic acid, benzotriazole and morpholine is less than 0.65% (w/w). Preferably, the respective concentration is: 0-0.134% (w/w) sodium molybdate dihydrate; 0-0.028% (w/w) sebacic acid; 0-0.028% (w/w) benzotriazole; 0.08-0.812% (w/w) morpholine and 0-0.134% (w/w) sodium nitrite.
대표청구항▼
1. A water-based glycol-free heat transfer fluid for inhibiting corrosion and protecting a pressure relief valve of an explosion-proof heater, the fluid comprising: sebacic acid;benzotriazole;morpholine, andat least one of sodium nitrite and sodium molybdate dihydrate;wherein a sum of concentrations
1. A water-based glycol-free heat transfer fluid for inhibiting corrosion and protecting a pressure relief valve of an explosion-proof heater, the fluid comprising: sebacic acid;benzotriazole;morpholine, andat least one of sodium nitrite and sodium molybdate dihydrate;wherein a sum of concentrations of sodium molybdate dihydrate, sodium nitrite, sebacic acid, benzotriazole and morpholine is equal to or less than 1% (w/w), and wherein a balance of the fluid is water such that at least 99% (w/w) of the fluid is water. 2. The glycol-free heat transfer fluid according to claim 1, wherein the sum of concentrations of sodium molybdate dihydrate, sodium nitrite, sebacic acid, benzotriazole and morpholine is less than 0.65% (w/w). 3. The glycol-free heat transfer fluid according to claim 1, wherein the concentration of sodium nitrite is up to 0.134% (w/w). 4. The glycol-free heat transfer fluid according to claim 1, wherein the concentration of sodium molybdate dihydrate is up to 0.134% (w/w). 5. The glycol-free heat transfer fluid according to claim 1, wherein the concentration of sebacic acid is up to 0.028% (w/w). 6. The glycol-free heat transfer fluid according to claim 1, wherein the concentration of benzotriazole is up to 0.028% (w/w). 7. The glycol-free heat transfer fluid according to claim 1, wherein the concentration of morpholine is up to 0.812% (w/w). 8. The glycol-free heat transfer fluid according to claim 1, having a pH 9.0-10.0. 9. A method of producing a water-based glycol-free heat transfer fluid for inhibiting corrosion and protecting a pressure relief valve of an explosion-proof heater, the method comprising: providing water; andadding only sebacic acid, benzotriazole, morpholine, and at least one of sodium nitrite and sodium molybdate dihydrate to the water so that a sum of concentrations is equal to or less than 1% (w/w) such that at least 99% (w/w) of the fluid is water. 10. The method according to claim 9, wherein the sum of concentrations of sodium molybdate dihydrate, sodium nitrite, sebacic acid, benzotriazole and morpholine is less than 0.65% (w/w). 11. The method according to claim 9, wherein the concentration of sodium molybdate dihydrate is up to 0.134% (w/w). 12. The method according to claim 9, wherein the concentration of sebacic acid is up to 0.028% (w/w). 13. The method according to claim 9, wherein the concentration of benzotriazole is up to 0.028% (w/w). 14. The method according to claim 9, wherein the concentration of morpholine is up to 0.812% (w/w). 15. The method according to claim 9, wherein the concentration of sodium nitrite is up to 0.134% (w/w). 16. The method according to claim 9, further comprising: adjusting a pH of the glycol-free heat transfer fluid to 9.0-10.0.
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이 특허에 인용된 특허 (4)
Woyciesjes Peter M. (Woodbury CT), Antifreeze compositions containing alkane tetracarboxylic acid for use with hard water.
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