GB1148248A - Method for producing an anhydrous alkali metal hydrosulphite - Google Patents
Method for producing an anhydrous alkali metal hydrosulphiteInfo
- Publication number
- GB1148248A GB1148248A GB2198567A GB2198567A GB1148248A GB 1148248 A GB1148248 A GB 1148248A GB 2198567 A GB2198567 A GB 2198567A GB 2198567 A GB2198567 A GB 2198567A GB 1148248 A GB1148248 A GB 1148248A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkali metal
- solution
- reaction
- temperature
- formate
- 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
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/64—Thiosulfates; Dithionites; Polythionates
- C01B17/66—Dithionites or hydrosulfites (S2O42-)
Abstract
1,148,248. Anhydrous alkali metal hydrosulphite. MITSUBISHI EDOGAWAKAGAKU K.K. 11 May, 1967 [16 May, 1966 (2); 17 Nov., 1966], No. 21985/67. Heading C1A. Anhydrous alkali metal hydrosulphite is prepared by a method which comprises adding an aqueous or aqueous alcoholic solution of an alkali metal hydroxide, carbonate or sulphite and sulphur dioxide dissolved in alcoholic solution to an alcohol-water solution or suspension of an alkali metal formate and maintaining the temperature of the latter solution or suspension between 50‹ and 90‹ C. until the addition is complete and then maintaining the temperature of the resulting solution between 60‹ and 90‹ C. until the reaction is substantially complete. The sulphur dioxide may be dissolved in methanol, ethanol or propanol or a mixture thereof and may contain formic ester or esters. The temperature is preferably maintained throughout the reaction from 70‹ to 88‹ C. and the pressure is preferably not more than 10 kg./cm.<SP>2</SP>. The reaction time is preferably from 30 minutes to 3 hours. Examples are given using sodium hydroxide as the alkali metal compound and sodium formate as the alkali metal formate. Any volatile low boiling point compounds such as formic acid ester which are boiled off from the reaction solution are trapped by being cooled below their boiling points and are subsequently returned to the reaction solution.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3069066 | 1966-05-16 | ||
| JP3068966 | 1966-05-16 | ||
| JP7523766A JPS4838556B1 (en) | 1966-11-17 | 1966-11-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1148248A true GB1148248A (en) | 1969-04-10 |
Family
ID=27287061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2198567A Expired GB1148248A (en) | 1966-05-16 | 1967-05-11 | Method for producing an anhydrous alkali metal hydrosulphite |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE698427A (en) |
| DE (1) | DE1592013B2 (en) |
| GB (1) | GB1148248A (en) |
| NL (1) | NL150083B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2207860A1 (en) * | 1972-11-28 | 1974-06-21 | Mitsubishi Gas Chemical Co | |
| US3947559A (en) * | 1973-03-30 | 1976-03-30 | Geoffrey Moorhouse Gibson | Alkali metal dithionite manufacture |
| US10850982B2 (en) | 2015-04-29 | 2020-12-01 | Basf Se | Stabilization of sodium dithionite by means of various additives |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4814558B1 (en) * | 1969-11-07 | 1973-05-08 | ||
| US3718732A (en) * | 1971-01-13 | 1973-02-27 | Virginia Chemicals Inc | Method of recovering chemical values from a formate-sodium hydrosulfite reaction mixture |
| CA1103888A (en) * | 1976-06-24 | 1981-06-30 | Charles E. Winslow | Production of sodium dithionite from sulfur dioxide, sodium formate and sodium carbonate with minimum solvent |
| DE102005058854A1 (en) | 2005-12-09 | 2007-06-14 | Basf Ag | Process for the surface treatment of dithionite |
-
1967
- 1967-05-10 DE DE1967M0073922 patent/DE1592013B2/en active Granted
- 1967-05-11 GB GB2198567A patent/GB1148248A/en not_active Expired
- 1967-05-12 BE BE698427D patent/BE698427A/xx not_active IP Right Cessation
- 1967-05-16 NL NL6706773A patent/NL150083B/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2207860A1 (en) * | 1972-11-28 | 1974-06-21 | Mitsubishi Gas Chemical Co | |
| US3947559A (en) * | 1973-03-30 | 1976-03-30 | Geoffrey Moorhouse Gibson | Alkali metal dithionite manufacture |
| US10850982B2 (en) | 2015-04-29 | 2020-12-01 | Basf Se | Stabilization of sodium dithionite by means of various additives |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1592013B2 (en) | 1972-08-24 |
| BE698427A (en) | 1967-11-13 |
| NL150083B (en) | 1976-07-15 |
| NL6706773A (en) | 1967-11-17 |
| DE1592013A1 (en) | 1971-02-11 |
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