GB443101A - Improvements in and relating to the manufacture of sodium carbonate - Google Patents
Improvements in and relating to the manufacture of sodium carbonateInfo
- Publication number
- GB443101A GB443101A GB2359934A GB2359934A GB443101A GB 443101 A GB443101 A GB 443101A GB 2359934 A GB2359934 A GB 2359934A GB 2359934 A GB2359934 A GB 2359934A GB 443101 A GB443101 A GB 443101A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sodium carbonate
- sodium
- converted
- chloride
- anhydrous
- 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
- C01D7/35—Varying the content of water of crystallisation or the specific gravity
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
Anhydrous sodium carbonate is obtained by evaporating solutions thereof at atmospheric or reduced pressure, the transition temperature of the reaction Na2CO3.1H2O --> Na2CO3 + H2O being lowered by the addition to the solution to be evaporated of a readily soluble compound or compounds of the alkali metals other than acid salts and compounds which form mixed crystals with sodium carbonate, and the amount of such addition being sufficient to lower the transition temperature to below the temperature at which the concentration is effected but not so great that separation of the additional substance or substances takes place. Alternatively, hydrated sodium carbonates are converted into the anhydrous form by heating them, at atmospheric or sub-atmospheric pressure, in suspension in water to above the transition temperature, with evaporation if required, in the presence of the above additional substances present in the above defined amount. Suitable alkali metal compounds are sodium chloride, sodium hydroxide and potassium hydroxide. Light soda ash may be converted into heavy soda ash by converting the light soda ash into sodium carbonate monohydrate which is then converted into the anhydrous salt as described. According to an example, light ash containing sodium chloride is introduced into a liquor containing sodium carbonate and 16,4 per cent of chloride. The mixture is digested at 80--90 DEG C. until the light ash is converted into monohydrate when the temperature is raised to 106 DEG C. The resulting anhydrous carbonate is removed by centrifuging and the mother liquor which has the same composition as that originally employed, is returned for use in further conversions. When commercial sodium carbonate containing chloride is used, the process may be commenced with the addition of the minimum necessary amount of sodium chloride, the liquors being allowed to become enriched in the course of continuous operation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2359934A GB443101A (en) | 1934-08-15 | 1934-08-15 | Improvements in and relating to the manufacture of sodium carbonate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2359934A GB443101A (en) | 1934-08-15 | 1934-08-15 | Improvements in and relating to the manufacture of sodium carbonate |
Publications (1)
Publication Number | Publication Date |
---|---|
GB443101A true GB443101A (en) | 1936-02-17 |
Family
ID=10198269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2359934A Expired GB443101A (en) | 1934-08-15 | 1934-08-15 | Improvements in and relating to the manufacture of sodium carbonate |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB443101A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1567901B1 (en) * | 1964-03-12 | 1970-08-20 | Allied Chem | Continuous process for the production of dense crystalline sodium carbonate or sodium carbonate monohydrate |
FR2475067A1 (en) * | 1980-02-01 | 1981-08-07 | Asahi Glass Co Ltd | PROCESS FOR THE PREPARATION OF ANHYDROUS SODIUM CARBONATE CRYSTAL |
FR2475027A1 (en) * | 1980-02-04 | 1981-08-07 | Asahi Glass Co Ltd | PROCESS FOR PRODUCING SODIUM ANHYDROUS CARBONATE CRYSTALS |
CN117865183A (en) * | 2024-03-08 | 2024-04-12 | 山东海天生物化工有限公司 | Clean production process for improving crystallinity granularity of re-ash |
-
1934
- 1934-08-15 GB GB2359934A patent/GB443101A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1567901B1 (en) * | 1964-03-12 | 1970-08-20 | Allied Chem | Continuous process for the production of dense crystalline sodium carbonate or sodium carbonate monohydrate |
FR2475067A1 (en) * | 1980-02-01 | 1981-08-07 | Asahi Glass Co Ltd | PROCESS FOR THE PREPARATION OF ANHYDROUS SODIUM CARBONATE CRYSTAL |
US4405592A (en) * | 1980-02-01 | 1983-09-20 | Asahi Glass Company Ltd. | Process for producing anhydrous sodium carbonate crystal |
FR2475027A1 (en) * | 1980-02-04 | 1981-08-07 | Asahi Glass Co Ltd | PROCESS FOR PRODUCING SODIUM ANHYDROUS CARBONATE CRYSTALS |
US4406869A (en) * | 1980-02-04 | 1983-09-27 | Asahi Glass Company Ltd. | Process for producing anhydrous sodium carbonate crystal |
CN117865183A (en) * | 2024-03-08 | 2024-04-12 | 山东海天生物化工有限公司 | Clean production process for improving crystallinity granularity of re-ash |
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