GB728698A - Process for the treatment of natural calcium carbonates, and the products obtained by this process - Google Patents

Process for the treatment of natural calcium carbonates, and the products obtained by this process

Info

Publication number
GB728698A
GB728698A GB32198/52A GB3219852A GB728698A GB 728698 A GB728698 A GB 728698A GB 32198/52 A GB32198/52 A GB 32198/52A GB 3219852 A GB3219852 A GB 3219852A GB 728698 A GB728698 A GB 728698A
Authority
GB
United Kingdom
Prior art keywords
carbonate
acid
acids
mills
temperature
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
GB32198/52A
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.)
Blanc Omya SA Du
Original Assignee
Blanc Omya SA Du
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 Blanc Omya SA Du filed Critical Blanc Omya SA Du
Publication of GB728698A publication Critical patent/GB728698A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/02—Compounds of alkaline earth metals or magnesium
    • C09C1/021—Calcium carbonates
    • 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
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • 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)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Glanulating (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Natural calcium carbonate is ground in the presence of one or more fatty acids having at least 12 carbon atoms in the molecule at a temperature at least equal to that at which carbonic acid is displaced from the carbonate by said acid or acids, thereby forming an adherant coating of the calcium salt or salts of the acid or acids on the carbonate particles. The acids are preferably those found in glycerides of animal or vegetable origin, and the proportion of acid may be from 0.1-10 per cent. by weight of the carbonate. Several varieties of chalk are referred to, as well as calcium carbonates of "saccharoid structure" and of marble type. The minimum temperature as a rule would be at least 80 DEG C. The heat may be supplied by preheated carbonate. The acid may be added as a fine rain or mist, or in the case of an acid solid at the temperature concerned, as a fine powder which is mixed with the carbonate before entry into the mill. The product is suitable as a filler for plastics and paints.ALSO:Natural calcium carbonate is ground in the presence of one or more fatty acids having at least twelve carbon atoms in the molecule at a temperature at least equal to that at which carbonic acid is displaced from the carbonate by said acid or acids to produce a free-flowing product. The acids, which are preferably those found in glycerides of animal or vegetable origin, may be used in the proportion of 0.1-10 per cent by weight of the carbonate. The minimum temperature normally would be at least 80 DEG C., heat being, if desired, supplied by preheating the carbonate. The acid may be supplied as a fine rain or mist before, during orid shortly after the entry of the carbonate into the mill, or as a fine powder before or during said entry. Suitable types of mills mentioned are hammer-mills of the micropulverizer type, pebble mills of the Raymond type, ball mills and roller mills.
GB32198/52A 1951-12-21 1952-12-19 Process for the treatment of natural calcium carbonates, and the products obtained by this process Expired GB728698A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR728698X 1951-12-21

Publications (1)

Publication Number Publication Date
GB728698A true GB728698A (en) 1955-04-27

Family

ID=9111986

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32198/52A Expired GB728698A (en) 1951-12-21 1952-12-19 Process for the treatment of natural calcium carbonates, and the products obtained by this process

Country Status (1)

Country Link
GB (1) GB728698A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2727845A1 (en) * 1977-06-21 1979-01-04 Pluss Stauffer Ag SURFACE-TREATED MINERAL FILLER
US4158075A (en) * 1975-11-12 1979-06-12 Sekisui Kagaku Kogyo Kabushiki Kaisha Stabilizers for chlorine-containing resins and process for producing the same
EP0401870A2 (en) * 1985-07-11 1990-12-12 Union Carbide Corporation Impact promoters for mineralfilled thermoplastics
EP0510890A2 (en) * 1991-04-23 1992-10-28 Ecc International Limited Dry grinding
WO2000001769A1 (en) * 1998-07-02 2000-01-13 Oegretici Celalettin Covering micro minerals with fat acid in hammer crushers
EP1068031A1 (en) * 1997-12-03 2001-01-17 Imerys Pigments, Inc. Treating particulate alkaline earth metal carbonates
DE102006060977A1 (en) * 2006-12-20 2008-06-26 Cemag Anlagenbau Gmbh Method and device for coating powdered material

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4158075A (en) * 1975-11-12 1979-06-12 Sekisui Kagaku Kogyo Kabushiki Kaisha Stabilizers for chlorine-containing resins and process for producing the same
DE2727845A1 (en) * 1977-06-21 1979-01-04 Pluss Stauffer Ag SURFACE-TREATED MINERAL FILLER
EP0401870A2 (en) * 1985-07-11 1990-12-12 Union Carbide Corporation Impact promoters for mineralfilled thermoplastics
EP0401870B1 (en) * 1985-07-11 1994-12-21 Union Carbide Corporation Impact promoters for mineralfilled thermoplastics
EP0510890A2 (en) * 1991-04-23 1992-10-28 Ecc International Limited Dry grinding
EP0510890A3 (en) * 1991-04-23 1993-02-03 Ecc International Limited Dry grinding
US5238193A (en) * 1991-04-23 1993-08-24 Ecc International Limited Dry grinding
EP1068031A1 (en) * 1997-12-03 2001-01-17 Imerys Pigments, Inc. Treating particulate alkaline earth metal carbonates
EP1068031A4 (en) * 1997-12-03 2002-07-31 Imerys Pigments Inc Treating particulate alkaline earth metal carbonates
WO2000001769A1 (en) * 1998-07-02 2000-01-13 Oegretici Celalettin Covering micro minerals with fat acid in hammer crushers
DE102006060977A1 (en) * 2006-12-20 2008-06-26 Cemag Anlagenbau Gmbh Method and device for coating powdered material
WO2008074811A1 (en) * 2006-12-20 2008-06-26 Cemag Anlagenbau Gmbh Process and apparatus for coating pulverulent material and coated material and use thereof

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