GB487009A - Process for obtaining high standard and easily filtered calcium hypochlorite - Google Patents
Process for obtaining high standard and easily filtered calcium hypochloriteInfo
- Publication number
- GB487009A GB487009A GB23362/37A GB2336237A GB487009A GB 487009 A GB487009 A GB 487009A GB 23362/37 A GB23362/37 A GB 23362/37A GB 2336237 A GB2336237 A GB 2336237A GB 487009 A GB487009 A GB 487009A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hypochlorite
- basic
- suspension
- chlorination
- calcium
- 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
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 title abstract 6
- 238000000034 method Methods 0.000 title abstract 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 abstract 18
- 239000000725 suspension Substances 0.000 abstract 5
- 238000005660 chlorination reaction Methods 0.000 abstract 4
- 230000007935 neutral effect Effects 0.000 abstract 4
- 239000013078 crystal Substances 0.000 abstract 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 2
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 2
- 239000004571 lime Substances 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 239000000047 product Substances 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract 1
- 239000007900 aqueous suspension Substances 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000007844 bleaching agent Substances 0.000 abstract 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 abstract 1
- 239000000920 calcium hydroxide Substances 0.000 abstract 1
- 239000007795 chemical reaction product Substances 0.000 abstract 1
- 239000000460 chlorine Substances 0.000 abstract 1
- 229910052801 chlorine Inorganic materials 0.000 abstract 1
- 238000010790 dilution Methods 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 239000000706 filtrate Substances 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000010899 nucleation Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
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
Neutral or "slightly basic" calcium hypochlorites are obtained by the chlorination of an aqueous suspension of lime, strongly basic hypochlorite or bleaching powder, the formation of hypochlorite crystals being initiated in the presence of previously formed neutral or "slightly basic" solid calcium hypochlorite. "Slightly basic" calcium hypochlorites are defined as products having a basicity weaker than corresponds to 1 mol. calcium hydroxide per mol. calcium hypochlorite. The addition of the "seeding" hypochlorite should not be made so early in the chlorination that the crystals are completely or partially dissolved before the reaction product commences to crystallize. The addition may be repeated once or several times during chlorination, if desired while the chlorine is being introduced. From 5-300 per cent or more neutral or "slightly basic" hypochlorite reckoned on the weight of hypochlorite to be formed may be present. For the production of a practically neutral product, the temperature should not exceed 35 DEG C., 20-25 DEG C. being suitable. For the production of "slightly basic" hypochlorite, a temperature of above 40 DEG C. may be employed. The process may be carried out cyclically by withdrawing part of the suspension after chlorination and adding it to a suspension of basic hypochlorite, preferably dibasic, and again chlorinating. Alternatively, the solid part of the withdrawn suspension may be separated by centrifuging or filtration, and the filtrate treated with lime to form basic hypochlorite, to which is added a supplementary quantity of basic hypochlorite, if desired, and the remaining part of the chlorinated suspension. The mixture is chlorinated after dilution with water if necessary. Only a small part of the chlorinated suspension may be withdrawn at a time. The crystals obtained can be easily filtered, dried and washed. Drying may be effected in a current of air at 60-105 DEG C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS487009X | 1936-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB487009A true GB487009A (en) | 1938-06-14 |
Family
ID=5453103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23362/37A Expired GB487009A (en) | 1936-08-29 | 1937-08-25 | Process for obtaining high standard and easily filtered calcium hypochlorite |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB487009A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429531A (en) * | 1944-02-18 | 1947-10-21 | Mathieson Alkali Works Inc | Process for producing calcium hypochlorite |
| US2469901A (en) * | 1945-11-24 | 1949-05-10 | Pennsylvania Salt Mfg Co | Production of calcium hypochlorite |
| US2587071A (en) * | 1945-11-24 | 1952-02-26 | Pennsylvania Salt Mfg Co | Production of calcium hypochlorite |
| US4337236A (en) * | 1980-08-07 | 1982-06-29 | Olin Corporation | Process for manufacture of calcium hypochlorite |
| US4416864A (en) * | 1982-09-30 | 1983-11-22 | Olin Corporation | Process for calcium hypochlorite |
| US4521397A (en) * | 1982-08-04 | 1985-06-04 | Asahi Glass Company, Ltd. | Process for producing calcium hypochlorite hydrate crystals |
-
1937
- 1937-08-25 GB GB23362/37A patent/GB487009A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429531A (en) * | 1944-02-18 | 1947-10-21 | Mathieson Alkali Works Inc | Process for producing calcium hypochlorite |
| US2469901A (en) * | 1945-11-24 | 1949-05-10 | Pennsylvania Salt Mfg Co | Production of calcium hypochlorite |
| US2587071A (en) * | 1945-11-24 | 1952-02-26 | Pennsylvania Salt Mfg Co | Production of calcium hypochlorite |
| US4337236A (en) * | 1980-08-07 | 1982-06-29 | Olin Corporation | Process for manufacture of calcium hypochlorite |
| US4521397A (en) * | 1982-08-04 | 1985-06-04 | Asahi Glass Company, Ltd. | Process for producing calcium hypochlorite hydrate crystals |
| US4416864A (en) * | 1982-09-30 | 1983-11-22 | Olin Corporation | Process for calcium hypochlorite |
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