GB651642A - Improvements in or relating to the production of sodium carbonate - Google Patents
Improvements in or relating to the production of sodium carbonateInfo
- Publication number
- GB651642A GB651642A GB331/48A GB33148A GB651642A GB 651642 A GB651642 A GB 651642A GB 331/48 A GB331/48 A GB 331/48A GB 33148 A GB33148 A GB 33148A GB 651642 A GB651642 A GB 651642A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nitrate
- sodium
- magnesium
- bicarbonate
- calcium
- 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
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/02—Preparation by double decomposition
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Sodium carbonate is made by reacting sodium nitrate in solution with magnesium bicarbonate to produce magnesium nitrate and insoluble sodium bicarbonate and separating and roasting the latter. In one embodiment, sodium sulphate is added to a solution of calcium nitrate, coming from a subsequent step of the cyclic process, to produce a precipitate of hydrated calcium sulphate and a solution of sodium nitrate which is freed from dissolved calcium sulphate by the addition of barium carbonate. By calcining calcium carbonate there are obtained (a) quick-lime, which is converted into milk of lime and reacted with magnesium nitrate to produce calcium-nitrate, for reaction with sodium sulphate, and magnesium hydroxide, and (b) carbon dioxide which is reacted with magnesium hydroxide to form hydrated magnesium carbonate, which is precipitated as such in the cold, and this is converted into the bicarbonate by reaction under pressure with carbon dioxide obtained by roasting the sodium bicarbonate precipitated by reacting the magnesium bicarbonate with sodium nitrate, the magnesium nitrate formed in the latter reaction being returned to the process. The sodium nitrate in solution may either be mixed with hydrated magnesium carbonate and carbon dioxide introduced under pressure while cooling with stirring, or be mixed with a solution of magnesium bicarbonate, saturated previously in the cold under pressure of carbon dioxide, or be mixed with hydrated magnesia and carbon dioxide bubbled therethrough under increasing pressure as the temperature is lowered. When sodium nitrate is used as starting material, calcium nitrate produced during the process may be separated out, and when sodium sulphate is used as starting material, gypsum is separated as a by-product.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR651642X | 1947-01-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB651642A true GB651642A (en) | 1951-04-04 |
Family
ID=9004791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB331/48A Expired GB651642A (en) | 1947-01-06 | 1948-01-05 | Improvements in or relating to the production of sodium carbonate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB651642A (en) |
-
1948
- 1948-01-05 GB GB331/48A patent/GB651642A/en not_active Expired
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