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 particles

Info

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
Application number
GB3172939A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PPG Industries Inc
Original Assignee
Pittsburgh Plate Glass Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pittsburgh Plate Glass Co filed Critical Pittsburgh Plate Glass Co
Priority to GB3172939A priority Critical patent/GB540044A/en
Publication of GB540044A publication Critical patent/GB540044A/en
Expired legal-status Critical Current

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.
GB3172939A 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 Expired GB540044A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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