GB951668A - Removal of thiosulphates and sulphides from hydrated lime used to make calcium chloride - Google Patents
Removal of thiosulphates and sulphides from hydrated lime used to make calcium chlorideInfo
- Publication number
- GB951668A GB951668A GB1564961A GB1564961A GB951668A GB 951668 A GB951668 A GB 951668A GB 1564961 A GB1564961 A GB 1564961A GB 1564961 A GB1564961 A GB 1564961A GB 951668 A GB951668 A GB 951668A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphides
- calcium chloride
- hydrated lime
- thiosulphates
- removal
- 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
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 title abstract 4
- 239000001110 calcium chloride Substances 0.000 title abstract 4
- 229910001628 calcium chloride Inorganic materials 0.000 title abstract 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 title abstract 4
- 239000000920 calcium hydroxide Substances 0.000 title abstract 4
- 235000011116 calcium hydroxide Nutrition 0.000 title abstract 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 title abstract 4
- 150000003568 thioethers Chemical class 0.000 title abstract 4
- 150000004764 thiosulfuric acid derivatives Chemical class 0.000 title 1
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract 2
- 238000004821 distillation Methods 0.000 abstract 2
- 239000011790 ferrous sulphate Substances 0.000 abstract 2
- 235000003891 ferrous sulphate Nutrition 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract 1
- 238000009621 Solvay process Methods 0.000 abstract 1
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 abstract 1
- 235000019270 ammonium chloride Nutrition 0.000 abstract 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 239000004571 lime Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/18—Preparation by the ammonia-soda process
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/20—Halides
- C01F11/24—Chlorides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Paper (AREA)
Abstract
Calcium chloride liquors, obtained by reacting ammonium chloride with hydrated lime, obtained from acetylene production, in the distiltillers of an ammonia-soda process, are freed from sulphite and fluosulphate impurities by heating the hydrated lime before entry into the distillation system to a temperature between 323-400 DEG C. to convert the fluosulphate to sulphides, admitting the lime to the distillation system and adding ferrous sulphate to the distilled to precipitate sulphides as ferrous sulphide. The sulphides are separated from the calcium chloride containing liquor and the liquor subjected to evaporation to obtain calcium chloride. The amount of ferrous sulphate added to the distillers is from 5-20% excess over that stoichiometrically equivalent to the total sulphide present in the hydrated lime after heating. Specification 945,960 is referred to.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1564961A GB951668A (en) | 1961-05-01 | 1961-05-01 | Removal of thiosulphates and sulphides from hydrated lime used to make calcium chloride |
| FR895610A FR1329021A (en) | 1961-05-01 | 1962-04-25 | removal of oxidizable sulfur compounds from hydrated lime used in the manufacture of calcium chloride |
| ES276903A ES276903A1 (en) | 1961-05-01 | 1962-04-30 | Calcium chloride manufacturing procedure (Machine-translation by Google Translate, not legally binding) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1564961A GB951668A (en) | 1961-05-01 | 1961-05-01 | Removal of thiosulphates and sulphides from hydrated lime used to make calcium chloride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB951668A true GB951668A (en) | 1964-03-11 |
Family
ID=10062937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1564961A Expired GB951668A (en) | 1961-05-01 | 1961-05-01 | Removal of thiosulphates and sulphides from hydrated lime used to make calcium chloride |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES276903A1 (en) |
| GB (1) | GB951668A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3184490A1 (en) * | 2015-12-25 | 2017-06-28 | Zhenxi Zhou | Method for recycling ammonia from low-concentration ammonium chloride wastewater |
-
1961
- 1961-05-01 GB GB1564961A patent/GB951668A/en not_active Expired
-
1962
- 1962-04-30 ES ES276903A patent/ES276903A1/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3184490A1 (en) * | 2015-12-25 | 2017-06-28 | Zhenxi Zhou | Method for recycling ammonia from low-concentration ammonium chloride wastewater |
Also Published As
| Publication number | Publication date |
|---|---|
| ES276903A1 (en) | 1962-06-16 |
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