Process for forming calcium nitrite
US4294813A · kind A · utility
1Cited by
7References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1980 |
| Grant date | Oct 13, 1981 |
| Priority date | — |
| Expiry date | Sep 23, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B21/50
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed herein is a process for preparing aqueous solutions of calcium nitrite by forming a solution of sodium nitrite and calcium nitrate; cooling the solution to precipitate sodium nitrate; admixing calcium hydroxide with the residual aqueous phase and forming a double salt of calcium nitrite/calcium hydroxide; and decomposing the double salt in the presence of water to form a solution of calcium nitrite and insolubilize calcium hydroxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.