GB375827A - Improvements in or relating to the manufacture of bleaching powder - Google Patents
Improvements in or relating to the manufacture of bleaching powderInfo
- Publication number
- GB375827A GB375827A GB990731A GB990731A GB375827A GB 375827 A GB375827 A GB 375827A GB 990731 A GB990731 A GB 990731A GB 990731 A GB990731 A GB 990731A GB 375827 A GB375827 A GB 375827A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reaction
- water
- lime
- excess
- chlorine
- 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
- C01B11/00—Oxides or oxyacids of halogens; Salts thereof
- C01B11/04—Hypochlorous acid
- C01B11/06—Hypochlorites
- C01B11/064—Hypochlorites of alkaline-earth metals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
High grade bleaching powder is obtained in a continuous process by exposing hydrate of lime to a current of undiluted or moderately diluted chlorine in excess while maintaining the partial pressure of water vapour in the reaction space during the whole of the reaction at such a level that the reactivity of the lime is retained. Gases containing at least 30 per cent chlorine are used and temperatures exceeding 50 DEG C. and up to 100 DEG C. are preferably employed. With countercurrent working moistened hydrate of lime may be used or water or steam be introduced into the reaction zone; alternatively the water may be partly replaced by an inert liquid boiling below 100 DEG C. such as carbon tetrachloride or chloroform. With co-current working the presence of excess water is unnecessary, but residual moisture is removed from the chlorinated product by external heating, whilst the heat of reaction at the beginning may be removed by moderate external cooling. Reaction may be effected in a rotary tube, and the excess chlorine passing off be dried and returned to the process. Drying of the chlorinated product is effected or completed in the lower end of the tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB990731A GB375827A (en) | 1931-04-01 | 1931-04-01 | Improvements in or relating to the manufacture of bleaching powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB990731A GB375827A (en) | 1931-04-01 | 1931-04-01 | Improvements in or relating to the manufacture of bleaching powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB375827A true GB375827A (en) | 1932-07-01 |
Family
ID=9880990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB990731A Expired GB375827A (en) | 1931-04-01 | 1931-04-01 | Improvements in or relating to the manufacture of bleaching powder |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB375827A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2806765A (en) * | 1953-05-20 | 1957-09-17 | Olin Mathieson | Process for production of bleaching powder |
-
1931
- 1931-04-01 GB GB990731A patent/GB375827A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2806765A (en) * | 1953-05-20 | 1957-09-17 | Olin Mathieson | Process for production of bleaching powder |
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