GB1207854A - Production of sodium hydrogen sulphite - Google Patents
Production of sodium hydrogen sulphiteInfo
- Publication number
- GB1207854A GB1207854A GB4581767A GB4581767A GB1207854A GB 1207854 A GB1207854 A GB 1207854A GB 4581767 A GB4581767 A GB 4581767A GB 4581767 A GB4581767 A GB 4581767A GB 1207854 A GB1207854 A GB 1207854A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stage
- solution
- absorption
- nahso
- aqueous
- 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
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/14—Preparation of sulfites
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
1,207,854. Sodium hydrogen sulphite. FARBENFABRIKEN BAYER A.G. 6 Oct., 1967 [13 Oct., 1966], No. 45817/67. Heading C1A. SO 2 is absorbed in the first stage of an absorption process by an aqueous solution of Na 2 SO 3 and NaRSO 3 , and the depleted SO 2 passes to a second absorption column, where it is washed with a similar solution, e.g. containing 180 to 230 g/l. of Na 2 SO 3 with corresponding concentrations of 220 to 140 g/l. respectively of NaHSO 3 , at pH 6 to 7. The pH of the solution in the second stage is maintained by the addition of aqueous NaOH solution of concentration 10-40% by weight, or of aqueous Na 2 CO 3 solution, and the whole process is maintained at a temperature of 15‹ to 90‹ C. The effluent of the second absorption stage is partly cycled as washing liquid for the first stage via a buffering vessel, and partly recycled through the second stage, the amount of recycle depending on the rate of removal of NaHSO 3 from the system and being such that precipitation of Na 2 SO 3 in the absorption columns is avoided. The effluent of the first stage is run off as product via a buffering vessel, whence it may be partly recycled through the first stage to allow for fluctuations in the SO 2 content of the feed gases, which may be roasting gases or other SO 2 -containing gases. The product solution contains 30 to 45% NaHSO 3 by weight.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1567951 | 1966-10-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1207854A true GB1207854A (en) | 1970-10-07 |
Family
ID=5678114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4581767A Expired GB1207854A (en) | 1966-10-13 | 1967-10-06 | Production of sodium hydrogen sulphite |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE704972A (en) |
| DE (1) | DE1567951B1 (en) |
| GB (1) | GB1207854A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2501644C2 (en) * | 1975-01-16 | 1984-04-19 | Wiegand Karlsruhe Gmbh, 7505 Ettlingen | Plant for the production of aqueous solutions of alkali and alkaline earth hydrogen salts |
| DE3415150A1 (en) | 1984-04-21 | 1985-10-31 | Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck | NOx scrubbing downstream of flue gas desulphurisation plants |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1186451B (en) * | 1963-08-14 | 1965-02-04 | Basf Ag | Process for the production of solid potassium disulfite |
-
1966
- 1966-10-13 DE DE1966F0050418 patent/DE1567951B1/en active Pending
-
1967
- 1967-10-06 GB GB4581767A patent/GB1207854A/en not_active Expired
- 1967-10-11 BE BE704972D patent/BE704972A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE704972A (en) | 1968-04-11 |
| DE1567951B1 (en) | 1970-09-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |