GB540044A - Improvements in or relating to the preparation of alkaline earth metal carbonates inthe form of relatively fine slow settling particles - Google Patents
Improvements in or relating to the preparation of alkaline earth metal carbonates inthe form of relatively fine slow settling particlesInfo
- Publication number
- GB540044A GB540044A GB3172939A GB3172939A GB540044A GB 540044 A GB540044 A GB 540044A GB 3172939 A GB3172939 A GB 3172939A GB 3172939 A GB3172939 A GB 3172939A GB 540044 A GB540044 A GB 540044A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkaline earth
- earth metal
- carbonate
- relating
- preparation
- 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
- C01F11/185—After-treatment, e.g. grinding, purification, conversion of crystal morphology
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
540,044. Alkaline earth carbonates. STEVENS, A. H. (Pittsburgh Plate Glass Co.). Dec. 7, 1939, No. 31729. [Class 1 (iii)] An alkaline earth metal carbonate is obtained in the form of relatively fine slow setting particles suitable for use as pigments by digesting a relatively coarse alkaline earth metal carbonate with a concentrated solution of an alkali metal hydroxide which is sufficiently concentrated to react with the carbonate and diluting with a substantial amount of water or aqueous alkaline solution to precipitate the carbonate. Thus, calcium carbonate or limestone in paste form is treated with a solution of sodium hydroxide in excess of 25, e.g. 50 per cent. by weight and diluted with water to obtain a fine precipitate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3172939A GB540044A (en) | 1939-12-07 | 1939-12-07 | Improvements in or relating to the preparation of alkaline earth metal carbonates inthe form of relatively fine slow settling particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3172939A GB540044A (en) | 1939-12-07 | 1939-12-07 | Improvements in or relating to the preparation of alkaline earth metal carbonates inthe form of relatively fine slow settling particles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB540044A true GB540044A (en) | 1941-10-03 |
Family
ID=10327516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3172939A Expired GB540044A (en) | 1939-12-07 | 1939-12-07 | Improvements in or relating to the preparation of alkaline earth metal carbonates inthe form of relatively fine slow settling particles |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB540044A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0447094A1 (en) * | 1990-03-13 | 1991-09-18 | Minerals Technologies Inc. | Rhombohedral calcium carbonate and accelerated heat-aging process for the production thereof |
-
1939
- 1939-12-07 GB GB3172939A patent/GB540044A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0447094A1 (en) * | 1990-03-13 | 1991-09-18 | Minerals Technologies Inc. | Rhombohedral calcium carbonate and accelerated heat-aging process for the production thereof |
| EP0703193A3 (en) * | 1990-03-13 | 1996-06-05 | Minerals Tech Inc | Rhombohedral calcium carbonate |
| EP0703315A3 (en) * | 1990-03-13 | 1996-06-26 | Minerals Tech Inc | Method for improving the optical properties of paper |
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