US1944301A - Process for producing bleaching powder - Google Patents
Process for producing bleaching powder Download PDFInfo
- Publication number
- US1944301A US1944301A US522163A US52216331A US1944301A US 1944301 A US1944301 A US 1944301A US 522163 A US522163 A US 522163A US 52216331 A US52216331 A US 52216331A US 1944301 A US1944301 A US 1944301A
- Authority
- US
- United States
- Prior art keywords
- bleaching powder
- chlorination
- lime
- hydrate
- inert
- 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 - Lifetime
Links
- 239000007844 bleaching agent Substances 0.000 title description 32
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 title description 25
- 238000000034 method Methods 0.000 title description 10
- 230000008569 process Effects 0.000 title description 10
- 238000005660 chlorination reaction Methods 0.000 description 20
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 13
- 235000011941 Tilia x europaea Nutrition 0.000 description 13
- 239000004571 lime Substances 0.000 description 13
- 239000007788 liquid Substances 0.000 description 13
- 239000000203 mixture Substances 0.000 description 10
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 10
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 8
- 239000000460 chlorine Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 229910052801 chlorine Inorganic materials 0.000 description 7
- 229950005499 carbon tetrachloride Drugs 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 150000001805 chlorine compounds Chemical class 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- JFBJUMZWZDHTIF-UHFFFAOYSA-N chlorine chlorite Inorganic materials ClOCl=O JFBJUMZWZDHTIF-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 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
Definitions
- the present invention relates to improvements in the manufacture of bleaching powder, and is more particularly concerned with an improved method of making bleaching powder in so-called 5 mechanical bleach chambers.
- An object of the present invention is to obviate the aforementioned difficulties arising in the manufacture of bleaching powder in mechanical bleach chambers. According to the present invention this object is attained by adding to the hydrate of lime, before or while causing it to react with chlorine, a liquid which is volatilizable, inert to chlorine and hypochlorite, and does not react with nor dissolve bleaching powder.
- a suitable liquid of this kind is, for example, carbontetrachloride.
- the amount of liquid applied in the process is so small, that the pulverulent condition of the hydrate of lime to be chlorinated is left unaltered during the whole chlorination.
- the amount of liquid thus required amounts to between about 3-7 percent by weight of the hydrate of lime.
- Example 1 To 1000 parts by weight of hydrate of lime, 64 parts by weight of C014 are added in a mechanical bleach chamber provided with an internal stirring and an external cooling device and are subjected to chlorination in the known manner while thoroughly stirring. When chlorination is completed, m5 the C014 is driven off in a vacuum at about 30- C., this treatment yielding 600 parts by weight of a bleaching powder containing 3'7 percent of available chlorine and only about 0.2 percent of chlorine in the form of chlorides. The EliOO water content of the product amounts to about percent of that contained in bleaching powder produced by the processes hitherto employed, i. e. without addition of C014.
- a process for producing bleaching powder in mechanical bleach chambers which comprises subjecting to chlorination a mixture substantially consisting of hydrate of lime with a liquid which is easily volatilizable and inert towards chlorine, @3110 subjecting to chlorination in a closed vessel a mixture substantially consisting of hydrate of lime with a liquid which is easily volatilizable and inert towards chlorine, towards hydrate of lime, and towards bleaching powder, said inert liquid being present in such quantities that the pulverulent state of the mixture under conditions of chlorination is maintained and cooling the walls of said vessel from without to a temperature sufficient to condense the inert liquid volatilized by the heat of reaction.
- a process for producing bleaching powder in mechanical bleach chambers which comprises subjecting to chlorination in a closed vessel a mixture substantially consisting of hydrate of lime with carbon-tetrachloride, the latter being present in such quantities that the pulverulent state of the mixture under conditions of chlorination is maintained, and cooling the walls of said vessel from without to a temperature suflicient to condense the carbon-tetrachloride volatilized by the heat of reaction.
- a process for producing bleaching powder in mechanical bleach chambers which comprises subjecting to chlorination a mixture of hydrate of lime with between about 3 and '7 percent by weight of carbon-tetrachloride so as to maintain the pulverulent condition of the mixture under the conditions of chlorination, subjecting said mixture to chlorination, and after chlorination is completed removing the carbon-tetrachloride by applying a vacuum at about 3040 C.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Detergent Compositions (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1944301X | 1930-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1944301A true US1944301A (en) | 1934-01-23 |
Family
ID=7750646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US522163A Expired - Lifetime US1944301A (en) | 1930-03-14 | 1931-03-12 | Process for producing bleaching powder |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1944301A (enrdf_load_stackoverflow) |
| BE (1) | BE378188A (enrdf_load_stackoverflow) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2443168A (en) * | 1945-08-17 | 1948-06-08 | Olin Mathieson | Process of purifying lithium hypochlorite |
-
1931
- 1931-03-12 US US522163A patent/US1944301A/en not_active Expired - Lifetime
- 1931-03-13 BE BE378188A patent/BE378188A/fr unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2443168A (en) * | 1945-08-17 | 1948-06-08 | Olin Mathieson | Process of purifying lithium hypochlorite |
Also Published As
| Publication number | Publication date |
|---|---|
| BE378188A (enrdf_load_stackoverflow) | 1931-04-30 |
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