GB860959A - Process for preparing precipitated products - Google Patents
Process for preparing precipitated productsInfo
- Publication number
- GB860959A GB860959A GB14248/58A GB1424858A GB860959A GB 860959 A GB860959 A GB 860959A GB 14248/58 A GB14248/58 A GB 14248/58A GB 1424858 A GB1424858 A GB 1424858A GB 860959 A GB860959 A GB 860959A
- Authority
- GB
- United Kingdom
- Prior art keywords
- calcium
- carbonate
- ions
- solution
- calcium carbonate
- 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
- 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
- C01F11/18—Carbonates
- C01F11/181—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by control of the carbonation conditions
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Paper (AREA)
Abstract
Pigmentary calcium carbonate is precipitated by contacting calcium ions and carbonate ions in an aqueous solution having a pH of at least 8.5 and the resulting precipitate is subjected to the shearing action of a stator and rotor of which the minimum peripheral relative speed is 1160 feet per minute. The precipitation is preferably effective at 25 DEG to 60 DEG C. and the calcium ions may be furnished by milk of lime or calcium <PICT:0860959/III/1> chloride and the carbonate ions by carbon dioxide or sodium carbonate. Crystals produced in this temperature range are elongated in shape and calcitic in structure. If precipitation is effected at - 10 DEG to 25 DEG C., the calcium carbonate crystals are cubic in shape; at above 60 DEG C. the crystals are needle-like in shape and are aragonite in structure. A suitable apparatus is shown in Fig. 2 where a reactor formed by cylindrical side-walls 16 and a hemispherical base 14 is provided with a rotor and stator arrangement generally indicated by 24. A stationary annular disc 32 has an outer and inner peripheral ring of teeth 34 and 36, embracing the upward extending teeth 40 of a rotor member 38 which is joined to the central shaft 44 by pumping blades or vanes 42. A solution bearing calcium ions is fed through a conduit 50 and the solution of carbonate ions is fed through conduit 56 which ends in a gas sparger 60. Product calcium carbonate is withdrawn at 68. Examples refer to the production of calcium carbonate by feeding milk of lime and carbon dioxide gas and to preparation by feeding calcium chloride solution with a solution containing sodium carbonate and sodium bicarbonate. A comparative example illustrates that the reaction between calcium chloride and a sodium carbonate/bicarbonate mixture will result in a calcium carbonate gel if vigorous agitation is not applied.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US860959XA | 1957-05-16 | 1957-05-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB860959A true GB860959A (en) | 1961-02-15 |
Family
ID=22196231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14248/58A Expired GB860959A (en) | 1957-05-16 | 1958-05-05 | Process for preparing precipitated products |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1181189B (en) |
FR (1) | FR1206815A (en) |
GB (1) | GB860959A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112408450A (en) * | 2020-11-27 | 2021-02-26 | 广西华纳新材料科技有限公司 | Preparation method of cubic-like nano calcium carbonate |
CN117682544A (en) * | 2024-02-04 | 2024-03-12 | 山东宇信纳米科技有限公司 | Preparation method and application of composite crystal form nano calcium carbonate |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR477646A (en) * | 1914-02-13 | 1915-11-03 | James Macdonald Hyde | Process for smelting zinc ores |
DE488246C (en) * | 1924-06-15 | 1929-12-23 | Carl Hinrichsen | Process for obtaining loose, easily filterable and washable precipitates |
DE629433C (en) * | 1932-10-30 | 1936-05-06 | I G Farbenindustrie Akt Ges | Device for the continuous production of fine-grained fur |
DE1000793B (en) * | 1955-02-03 | 1957-01-17 | Bayer Ag | Process for the production of readily dispersible silica fillers |
-
1958
- 1958-05-05 GB GB14248/58A patent/GB860959A/en not_active Expired
- 1958-05-16 DE DEW23344A patent/DE1181189B/en active Pending
- 1958-05-16 FR FR1206815D patent/FR1206815A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112408450A (en) * | 2020-11-27 | 2021-02-26 | 广西华纳新材料科技有限公司 | Preparation method of cubic-like nano calcium carbonate |
CN117682544A (en) * | 2024-02-04 | 2024-03-12 | 山东宇信纳米科技有限公司 | Preparation method and application of composite crystal form nano calcium carbonate |
CN117682544B (en) * | 2024-02-04 | 2024-05-24 | 山东宇信纳米科技有限公司 | Preparation method and application of composite crystal form nano calcium carbonate |
Also Published As
Publication number | Publication date |
---|---|
FR1206815A (en) | 1960-02-11 |
DE1181189B (en) | 1964-11-12 |
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