GB477230A - Manufacture of sodium hydroxide - Google Patents
Manufacture of sodium hydroxideInfo
- Publication number
- GB477230A GB477230A GB33873/36A GB3387336A GB477230A GB 477230 A GB477230 A GB 477230A GB 33873/36 A GB33873/36 A GB 33873/36A GB 3387336 A GB3387336 A GB 3387336A GB 477230 A GB477230 A GB 477230A
- Authority
- GB
- United Kingdom
- Prior art keywords
- soluble
- oxalate
- alkali
- metal
- sodium
- 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
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
- C01D1/04—Hydroxides
- C01D1/20—Preparation by reacting oxides or hydroxides with alkali metal salts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Sodium oxalate is precipitated by reacting a suitable metal oxalate and a soluble sodium salt, e.g. sodium chloride or nitrate, the acid radicle of which forms a soluble calcium salt, in the presence of water and a volatile alkali, e.g. ammonia or trimethylamine. The metal oxalate must be soluble in the presence of the alkali and the metal must give a soluble compound with the acid radicle of the sodium salt. Suitable oxalates are those of Cu, Zn, Ni, Ag, Co, and Cd.ALSO:Sodium hydroxide is prepared by reacting, in the presence of water and a volatile alkali, a suitable metal oxalate and a soluble sodium salt, e.g. the chloride or nitrate, the acid radicle of which forms a soluble calcium salt to precipitate sodium oxalate, causticizing this with lime to give sodium hydroxide and a precipitate of calcium oxalate, and reacting this precipitate with the mother liquor from the first stage, after removing at least part of the volatile alkali and adding acid to dissolve soluble constituents of the resulting precipitate, to precipitate the original metal oxalate. This oxalate must be soluble in the presence of the volatile alkali but less soluble than calcium oxalate, and the metal must yield soluble salts capable of reacting with calcium oxalate and of separation from the alkali to permit recovery thereof, and the compound of the metal and the acid radicle of the sodium salt must be soluble. Suitable metal oxalates include those of Cu, Zn, Ni, Ag, Co and Cd. In modifications, the precipitated calcium oxalate is added to the mother liquor prior to removal of volatile alkali or the alkali is removed, the resulting precipitate separated, treated with acid, and reacted with the calcium oxalate. Ammonia is the preferred alkali but other volatile alkalis, e.g. trimethylamine, may be used. The causticizing with lime is preferably carried out in two stages. Removal of volatile alkali may be effected by distillation in steam.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR477230X | 1935-12-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB477230A true GB477230A (en) | 1937-12-24 |
Family
ID=8903124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB33873/36A Expired GB477230A (en) | 1935-12-18 | 1936-12-09 | Manufacture of sodium hydroxide |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB477230A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4018875A (en) * | 1975-03-04 | 1977-04-19 | Robert Kenneth Jordan | Ammonium oxalate process |
US11607734B2 (en) | 2018-05-30 | 2023-03-21 | Hela Novel Metals Llc | Methods for the production of fine metal powders from metal compounds |
-
1936
- 1936-12-09 GB GB33873/36A patent/GB477230A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4018875A (en) * | 1975-03-04 | 1977-04-19 | Robert Kenneth Jordan | Ammonium oxalate process |
US11607734B2 (en) | 2018-05-30 | 2023-03-21 | Hela Novel Metals Llc | Methods for the production of fine metal powders from metal compounds |
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