GB864843A - Process for producing synthetic anhydrite - Google Patents
Process for producing synthetic anhydriteInfo
- Publication number
- GB864843A GB864843A GB1812558A GB1812558A GB864843A GB 864843 A GB864843 A GB 864843A GB 1812558 A GB1812558 A GB 1812558A GB 1812558 A GB1812558 A GB 1812558A GB 864843 A GB864843 A GB 864843A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anhydrite
- hydrogen fluoride
- chamber
- fluorspar
- water
- 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
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
- C04B11/262—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke waste gypsum other than phosphogypsum
-
- 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
Abstract
Synthetic anhydrite is obtained by grinding fluorspar so that not more than 1% remains on a 170 mesh screen (A.S.T.M. Fine Series Mesh), and reacting it with its molar equivalent of concentrated sulphuric acid at 150 DEG to 200 DEG C., the hydrogen fluoride obtained being passed into water to form hydrofluoric acid, and activating the anhydrite by adding to it material that gives it the property of setting when water is added to it (e.g. an alkali metal sulphate, lime or portland cement). The fluorspar and sulphuric acid may be continuously mixed in one chamber, where a part of the hydrogen fluoride is removed, and the reaction mixture continuously conveyed to a second chamber gas-sealed from the first chamber, where the remainder of the hydrogen fluoride is removed. The anhydrite obtained may be mixed with 3% of slaked lime or potassium sulphate. An example is given.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1812558A GB864843A (en) | 1958-06-06 | 1958-06-06 | Process for producing synthetic anhydrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1812558A GB864843A (en) | 1958-06-06 | 1958-06-06 | Process for producing synthetic anhydrite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB864843A true GB864843A (en) | 1961-04-06 |
Family
ID=10107085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1812558A Expired GB864843A (en) | 1958-06-06 | 1958-06-06 | Process for producing synthetic anhydrite |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB864843A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1185166B (en) * | 1962-05-03 | 1965-01-14 | Buss Ag | Process for the production of a synthetic anhydrite |
-
1958
- 1958-06-06 GB GB1812558A patent/GB864843A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1185166B (en) * | 1962-05-03 | 1965-01-14 | Buss Ag | Process for the production of a synthetic anhydrite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB938765A (en) | Sulfoaluminate cement | |
| ES282084A1 (en) | Procedimeinto with your apparatus for obtaining phosphoric acid, by wet process by the method of calcium sulfate dihydrate-semihydrate (Machine-translation by Google Translate, not legally binding) | |
| GB1429187A (en) | Process for the conversion of anhydrite into gypsum | |
| ES227612A1 (en) | Processes for producing mixed fertilizers | |
| US3024123A (en) | Process for producing synthetic anhydrite | |
| GB864843A (en) | Process for producing synthetic anhydrite | |
| US2426147A (en) | Cement manufacture | |
| US2937926A (en) | Method of preparing synthetic anhydrite | |
| ES478382A1 (en) | Process for recovering sulphuric acid from natural gypsum or phospho-gypsum. | |
| GB941900A (en) | Improvements in or relating to calcium carbonate | |
| GB800208A (en) | Granular products | |
| GB1248885A (en) | Manufacture of cement clinker | |
| JPS55167127A (en) | Continuously converting method for anhydrous gypsum into gypsum | |
| US1002143A (en) | Process of producing calcium metaphosphate and ammonia. | |
| GB435772A (en) | Improvements in and relating to the production of syngenite and to the production ofpotassium sulphate from potassium chloride | |
| GB848617A (en) | Improvements in or relating to the preparation of anhydrite | |
| GB907292A (en) | A process for the production of sulphate-resistant cement | |
| ES8102060A1 (en) | Process for preparing calcium sulphate hemihydrate, and hemihydrate so obtained. | |
| GB786647A (en) | Improvements in or relating to the purification of water | |
| GB384662A (en) | Improvements in or relating to the production of sulpho-cyanide compounds | |
| GB718887A (en) | A method of preparing artificial soil and the product of such method | |
| JPS51114396A (en) | Production of alpha-hemihydrate and needle-like crystal of 2-type anhydrous gypsum from sulfur oxide in waste gas | |
| GB825735A (en) | Process for the production of neutral synthetic anhydrite | |
| GB886887A (en) | Process for the production of glass making ingredients | |
| GB1037133A (en) | Improvements in or relating to the preparation of hydrofluoric acid |