GB756205A - Production of alkali metal hydroxides - Google Patents
Production of alkali metal hydroxidesInfo
- Publication number
- GB756205A GB756205A GB7644/54A GB764454A GB756205A GB 756205 A GB756205 A GB 756205A GB 7644/54 A GB7644/54 A GB 7644/54A GB 764454 A GB764454 A GB 764454A GB 756205 A GB756205 A GB 756205A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amalgam
- decomposer
- alkali metal
- heat
- exchanger
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J7/00—Apparatus for generating gases
- B01J7/02—Apparatus for generating gases by wet methods
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
<PICT:0756205/III/1> <PICT:0756205/III/2> Substantially all the alkali metal hydroxide content of an alkali metal amalgam obtained from a mercury cathode electrolytic cell is recovered by causing the amalgam to flow vertically through a first decomposition zone to which water is fed concurrently with the amalgam so as to partly decompose the amalgam and produce an alkali metal hydroxide solution of a concentration of at least 68 per cent and optionally 73-78 per cent, recovering the hydroxide solution and passing the partly decomposed amalgam from the said decomposition zone through a heat-exchanger, in heat-exchange relationship with undecomposed amalgam flowing towards the said zone, to a second decomposition zone wherein the amalgam is caused to flow horizontally in counter-current with fresh water so as to substantially completely decompose the amalgam and produce an alkali metal hydroxide solution of low concentration, e.g. 35-40 per cent, recovering the hydroxide solution and returning the decomposed amalgam to the electrolytic cell. As shown, amalgam to be denuded enters a vertical decomposer (Fig. 1) through inlet 1 and passes through heat-exchanger L and pipe F to distributer 3 from where it is directed on to graphite catalyst bodies contained in a series annular baskets A (see also Fig. 2, not shown) together with decomposing water which has been admitted at inlet S and passed through direct heat-exchanger M. Hydrogen and water vapour generated by the reaction passes through heat-exchanger M wherein the watervapour is condensed, and hydrogen passes out at 6. Concentrated alkali metal hydroxide is removed at 7 while partially denuded amalgam is passed through heat-exchanger L and outlet 4 to a horizontal decomposer (Fig. 3) through an inlet 8 wherein it passes over graphite catalyst strips Q (see also Fig. 3a, not shown) to outlet 9 in countercurrent to fresh water which passes from inlet 10 to outlet 11. Hydrogen produced in the vertical decomposer is passed into the horizontal decomposer at 12, and removed, together with hydrogen produced in the horizontal decomposer, at 13. The electrolytic cell may be arranged above the vertical decomposer (Fig. 4, not shown) or below the horizontal decomposer (Fig. 5, not shown).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7644/54A GB756205A (en) | 1954-03-16 | 1954-03-16 | Production of alkali metal hydroxides |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7644/54A GB756205A (en) | 1954-03-16 | 1954-03-16 | Production of alkali metal hydroxides |
Publications (1)
Publication Number | Publication Date |
---|---|
GB756205A true GB756205A (en) | 1956-08-29 |
Family
ID=9837056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7644/54A Expired GB756205A (en) | 1954-03-16 | 1954-03-16 | Production of alkali metal hydroxides |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB756205A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3029144A (en) * | 1960-03-09 | 1962-04-10 | Dow Chemical Co | Recovery of mercury from brine containing mercury salts in solution |
US3029143A (en) * | 1960-03-09 | 1962-04-10 | Dow Chemical Co | Recovery of mercury from brine containing mercury salts in solution |
-
1954
- 1954-03-16 GB GB7644/54A patent/GB756205A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3029144A (en) * | 1960-03-09 | 1962-04-10 | Dow Chemical Co | Recovery of mercury from brine containing mercury salts in solution |
US3029143A (en) * | 1960-03-09 | 1962-04-10 | Dow Chemical Co | Recovery of mercury from brine containing mercury salts in solution |
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