GB660413A - A method of preparing solid hydroxylamine sulphate - Google Patents
A method of preparing solid hydroxylamine sulphateInfo
- Publication number
- GB660413A GB660413A GB1212749A GB1212749A GB660413A GB 660413 A GB660413 A GB 660413A GB 1212749 A GB1212749 A GB 1212749A GB 1212749 A GB1212749 A GB 1212749A GB 660413 A GB660413 A GB 660413A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphate
- hydroxylamine
- calcium
- hydroxylamine sulphate
- filtered
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
- C01B21/14—Hydroxylamine; Salts thereof
- C01B21/1409—Preparation
- C01B21/1427—Preparation by reduction of nitrogen oxides or nitrites with bisulfite or sulfur dioxide, e.g. by the Raschig process
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Solid hydroxylamine sulphate is prepared by subjecting a solution of the salt in dilute sulphuric acid, obtained by hydrolyzing hydroxylamine disulphonates of alkaline earth metals, to concentration and precipitating the hydroxylamine sulphate by adding a liquid which is miscible with sulphuric acid but which does not easily dissolve hydroxylamine sulphate e.g. aliphatic alcohols or dioxan. Solutions of calcium nitrate and calcium bisulphate are mixed with stirring at up to 10 DEG C and the mixture saturated with sulphur dioxide to pH.3.6. The solution of calcium hydroxylamine disulphonate formed is hydrolyzed by heating to 80 DEG C for 1 hour and the calcium sulphate precipitate is filtered off. The filtrate is concentrated in vacuo at 30 DEG -40 DEG C, and any further calcium sulphate precipitated is filtered off, then further concentrated at 40 DEG -60 DEG C. The concentrate is either treated directly with denatured alcohol to precipitate the hydroxylamine sulphate or subjected to preliminary cooling to crystallize some of the salt.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS186948 | 1948-05-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB660413A true GB660413A (en) | 1951-11-07 |
Family
ID=5354131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1212749A Expired GB660413A (en) | 1948-05-18 | 1949-05-06 | A method of preparing solid hydroxylamine sulphate |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE488838A (en) |
| CH (1) | CH276139A (en) |
| FR (1) | FR985345A (en) |
| GB (1) | GB660413A (en) |
-
0
- BE BE488838D patent/BE488838A/xx unknown
-
1949
- 1949-04-26 CH CH276139D patent/CH276139A/en unknown
- 1949-04-29 FR FR985345D patent/FR985345A/en not_active Expired
- 1949-05-06 GB GB1212749A patent/GB660413A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR985345A (en) | 1951-07-17 |
| BE488838A (en) | |
| CH276139A (en) | 1951-06-30 |
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