GB319228A - Improvements in the preparation of calcium sulphate - Google Patents
Improvements in the preparation of calcium sulphateInfo
- Publication number
- GB319228A GB319228A GB1720928A GB1720928A GB319228A GB 319228 A GB319228 A GB 319228A GB 1720928 A GB1720928 A GB 1720928A GB 1720928 A GB1720928 A GB 1720928A GB 319228 A GB319228 A GB 319228A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- sulphuric acid
- sulphate
- anhydrous
- dehydrating agents
- 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
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 title abstract 6
- 239000001175 calcium sulphate Substances 0.000 title abstract 3
- 235000011132 calcium sulphate Nutrition 0.000 title abstract 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 5
- 239000001117 sulphuric acid Substances 0.000 abstract 5
- 235000011149 sulphuric acid Nutrition 0.000 abstract 5
- 150000003839 salts Chemical class 0.000 abstract 4
- 239000002253 acid Substances 0.000 abstract 3
- 239000003795 chemical substances by application Substances 0.000 abstract 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 abstract 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 2
- 230000018044 dehydration Effects 0.000 abstract 2
- 238000006297 dehydration reaction Methods 0.000 abstract 2
- 230000005484 gravity Effects 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 abstract 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 abstract 2
- 229910021653 sulphate ion Inorganic materials 0.000 abstract 2
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 abstract 2
- 238000013019 agitation Methods 0.000 abstract 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 238000010790 dilution Methods 0.000 abstract 1
- 235000011187 glycerol Nutrition 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- HDUMBHAAKGUHAR-UHFFFAOYSA-J titanium(4+);disulfate Chemical compound [Ti+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O HDUMBHAAKGUHAR-UHFFFAOYSA-J 0.000 abstract 1
Classifications
-
- 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
- C01F11/46—Sulfates
- C01F11/466—Conversion of one form of calcium sulfate to another
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
319,228. Spence & Sons, Ltd., P., and Crundall, S. F. W. June, 14, 1928. Calcium sulphate.-An extremely finely divided and apparently amorphous form of anhydrous calcium sulphate is obtained by treating hydrated forms thereof with suitable dehydrating agents. The hydrated salt may be mixed with sulphuric acid of specific gravity 1.6-1.84 and the mixture be maintained at 130‹ C. with agitation for say 1-2 hours, or be gradually heated to 140‹ C., or be allowed to stand at ordinary temperature for several days, or be maintained at 100‹ C. for the necessary time. The specific gravity of the sulphuric acid used should not fall below 1.3 during dehydration and the strength, quantity, and concentration thereof should be such that no solution of the sulphate or substantial formation of soluble acid sulphates occurs. The anhydrous sulphate is washed free from acid and dried, or dried and calcined. Dehydration may also be effected by fuming sulphuric acid at ordinary temperature, or by passing dry sulphur trioxide over the hydrated salt, and phosphoric acid or acid sulphates such as titanium sulphate may be used as dehydrating agents. According to the Provisional Specification, the hydrated salt may first be dissolved in concentrated sulphuric acid at say 140‹ C., and the anhydrous salt be then precipitated by dilution; or a mixture of hydrate and sulphuric acid be heated and then calcined; and phosphoric anhydride or glycerin may be used as dehydrating agents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1720928A GB319228A (en) | 1928-06-14 | 1928-06-14 | Improvements in the preparation of calcium sulphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1720928A GB319228A (en) | 1928-06-14 | 1928-06-14 | Improvements in the preparation of calcium sulphate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB319228A true GB319228A (en) | 1929-09-16 |
Family
ID=10091122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1720928A Expired GB319228A (en) | 1928-06-14 | 1928-06-14 | Improvements in the preparation of calcium sulphate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB319228A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3605393C1 (en) * | 1986-02-20 | 1987-09-03 | Knauf Westdeutsche Gips | Process for the preparation of anhydrous calcium sulphate (anhydrite) |
| US5964940A (en) * | 1998-04-20 | 1999-10-12 | Wilson; Harold W. | Process for increasing the water solubility of gypsum |
-
1928
- 1928-06-14 GB GB1720928A patent/GB319228A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3605393C1 (en) * | 1986-02-20 | 1987-09-03 | Knauf Westdeutsche Gips | Process for the preparation of anhydrous calcium sulphate (anhydrite) |
| US5964940A (en) * | 1998-04-20 | 1999-10-12 | Wilson; Harold W. | Process for increasing the water solubility of gypsum |
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