GB897205A - Precipitated calcium carbonate - Google Patents
Precipitated calcium carbonateInfo
- Publication number
- GB897205A GB897205A GB3527359A GB3527359A GB897205A GB 897205 A GB897205 A GB 897205A GB 3527359 A GB3527359 A GB 3527359A GB 3527359 A GB3527359 A GB 3527359A GB 897205 A GB897205 A GB 897205A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stage
- carbonation
- atmospheres
- milk
- lime
- 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
Abstract
Precipitated calcium carbonate suitable as a rubber filler is produced by carbonation of milk of lime with a CO2-containing gas in two stages, in the first of which the carbon dioxide is at a partial pressure of 0,2 atmospheres or less and in the second at a higher concentration. When a gas flow of 2 to 3 litres/minute per litre of a milk of lime containing 80 gm./litre of CaO is used, the preferred partial pressure of CO2 in the first stage is in the range 0,10 to 0,20 atmospheres, whilst in the second stage it is between 0,40 and 1,0 atmospheres. A suitable temperature for the milk of lime at the start of the carbonation is 20 to 25 DEG C. Examples illustrate the improved dispersibility in a rubber mix of the CaCO3 produced by the two-stage carbonation over CaCO3 produced by one-stage carbonation, the addition of stearic acid and of calcium stearate being discussed. Specification 562,544 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3527359A GB897205A (en) | 1959-10-19 | 1959-10-19 | Precipitated calcium carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3527359A GB897205A (en) | 1959-10-19 | 1959-10-19 | Precipitated calcium carbonate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB897205A true GB897205A (en) | 1962-05-23 |
Family
ID=10375856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3527359A Expired GB897205A (en) | 1959-10-19 | 1959-10-19 | Precipitated calcium carbonate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB897205A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4018877A (en) * | 1974-02-14 | 1977-04-19 | Imperial Chemical Industries Limited | Production of calcium carbonate |
| FR2433481A1 (en) * | 1978-04-05 | 1980-03-14 | Shiraishi Kogyo Kaisha Ltd | CALCIUM CARBONATE PARTICLES AND PROCESSES FOR PREPARING THE SAME |
| US6141142A (en) * | 1999-02-19 | 2000-10-31 | Lucent Technologies Inc. | Article comprising an L-Band optical fiber amplifier |
-
1959
- 1959-10-19 GB GB3527359A patent/GB897205A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4018877A (en) * | 1974-02-14 | 1977-04-19 | Imperial Chemical Industries Limited | Production of calcium carbonate |
| FR2433481A1 (en) * | 1978-04-05 | 1980-03-14 | Shiraishi Kogyo Kaisha Ltd | CALCIUM CARBONATE PARTICLES AND PROCESSES FOR PREPARING THE SAME |
| US6141142A (en) * | 1999-02-19 | 2000-10-31 | Lucent Technologies Inc. | Article comprising an L-Band optical fiber amplifier |
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