GB414497A - Improvements in or relating to the manufacture of caustic alkalis - Google Patents
Improvements in or relating to the manufacture of caustic alkalisInfo
- Publication number
- GB414497A GB414497A GB17158/33A GB1715833A GB414497A GB 414497 A GB414497 A GB 414497A GB 17158/33 A GB17158/33 A GB 17158/33A GB 1715833 A GB1715833 A GB 1715833A GB 414497 A GB414497 A GB 414497A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lime
- liquor
- reaction
- produced
- manufacture
- 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
- C01D1/22—Preparation by reacting oxides or hydroxides with alkali metal salts with carbonates or bicarbonates
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
In the manufacture of aqueous alkali hydroxide solutions by the reaction of an alkali metal carbonate with lime in the presence of water, a liquor free from iron and aluminium is obtained by adding a purifying reagent, selected from the group consisting of the oxides, hydroxides and water soluble salts of magnesium, barium or strontium, to the liquor prior to the separation of the precipitated calcium carbonate. The calcium carbonate sludge produced is thereafter separated from the caustic liquor. The reagent may be added to the lime, to the sodium carbonate or sodium carbonate liquor, to the reaction vessel during the reaction or to the reaction vessel after the reaction, but prior to the separation of the sludge. The process may be effected by using a lime produced by calcining dolomitic limestone or a mixture of lime with dolomitic lime. A magnesium compound may be supplied in solution, in suspension or in solid form. Aqueous sodium or potassium hydroxides may be produced by the process. Specification 178,896, [Class 1 (ii)], is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US414497XA | 1932-07-13 | 1932-07-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB414497A true GB414497A (en) | 1934-08-09 |
Family
ID=21916564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17158/33A Expired GB414497A (en) | 1932-07-13 | 1933-06-15 | Improvements in or relating to the manufacture of caustic alkalis |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB414497A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2575238A (en) * | 1948-08-02 | 1951-11-13 | Dow Chemical Co | Treatment of caustic soda cell liquor |
DE944066C (en) * | 1952-03-20 | 1956-08-16 | Electro Chimie Metal | Process for iron removal and decolorization of caustic alkali solutions |
-
1933
- 1933-06-15 GB GB17158/33A patent/GB414497A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2575238A (en) * | 1948-08-02 | 1951-11-13 | Dow Chemical Co | Treatment of caustic soda cell liquor |
DE944066C (en) * | 1952-03-20 | 1956-08-16 | Electro Chimie Metal | Process for iron removal and decolorization of caustic alkali solutions |
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