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EP1572589A2 - Carbonate de calcium ultra-sec - Google Patents

Carbonate de calcium ultra-sec

Info

Publication number
EP1572589A2
EP1572589A2 EP03789124A EP03789124A EP1572589A2 EP 1572589 A2 EP1572589 A2 EP 1572589A2 EP 03789124 A EP03789124 A EP 03789124A EP 03789124 A EP03789124 A EP 03789124A EP 1572589 A2 EP1572589 A2 EP 1572589A2
Authority
EP
European Patent Office
Prior art keywords
calcium carbonate
ultra
dry calcium
microwaves
carbonate particles
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.)
Withdrawn
Application number
EP03789124A
Other languages
German (de)
English (en)
Inventor
Christoph Nover
Helmut Dillenburg
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.)
Solvay Chemicals GmbH
Original Assignee
Solvay Chemicals GmbH
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 Solvay Chemicals GmbH filed Critical Solvay Chemicals GmbH
Publication of EP1572589A2 publication Critical patent/EP1572589A2/fr
Withdrawn legal-status Critical Current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
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • 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
    • 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
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/34—Filling pastes
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity
    • C01P2006/82—Compositional purity water content
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate

Definitions

  • the invention relates to an ultra-dry calcium carbonate.
  • Calcium carbonate is produced by reacting an aqueous calcium hydroxide suspension with CO 2 or a gas containing carbon dioxide or by intensive grinding of natural calcium carbonate. The product is dewatered and dried in a known manner.
  • Calcium carbonate is used e.g. B. in the production of paper, paints, sealants, adhesives, polymers, printing inks, rubber, etc. It is used as a functional filler with pigment properties.
  • dewatering is carried out by filtration or centrifugation and then drying is carried out with the aid of e.g. B. belt dryers, fluidized bed dryers, mill dryers etc.
  • B. belt dryers e.g. B. belt dryers, fluidized bed dryers, mill dryers etc.
  • the disadvantage of this method is that the calcium carbonate is initially dried satisfactorily, but absorbs moisture again from the surrounding air during cooling. Depending on the fineness or rather the specific surface, this moisture can be up to 3% by weight.
  • the object of the invention is to dry conventionally produced calcium carbonate completely by post-treatment with microwaves and thus to prepare it for use.
  • Microwaves are electromagnetic waves of different frequencies. Common frequencies are 915 MHz and 2.45 Ghz.
  • heat is generated by the direct conversion of electromagnetic energy into the kinetic energy of the molecules, ie in the moist material itself.
  • the conversion of electromagnetic energy into thermal energy takes place due to the electromagnetic properties of the materials to be heated. Whether and to what extent a material can be heated or dried using microwaves depends on its molecular structure.
  • Polar molecules ie molecules with different charge ranges, e.g. B. water, can be heated well with microwaves.
  • the polar molecule is set into rotation by the high-frequency alternating field of the microwaves and converts the electromagnetic energy into heat. Since every molecule converts heat and the microwaves can penetrate deeply depending on the material, the entire volume is heated. This is a significant advantage over conventional heating or drying, in which the heat can only penetrate the body through the surface of the material.
  • the penetration depth is calculated with:
  • the temperature curve of microwave heating is inverse to that of conventional heating. This inverse temperature profile is advantageous for microwave drying because a high pressure builds up inside the material, which pushes the water to the surface. This water evaporates on the surface, which keeps it constantly moist until the water has been almost completely removed from the inside. Only then does the surface begin to dry.
  • Powders or granules are preferably dried in microwave rotary kilns.
  • the material is guided through the heating zone in a rotating tube and heated or dried by the microwaves.
  • the system can be operated under vacuum, protective gas or in an air atmosphere.
  • the dumping height can be up to 20 cm depending on the design of the device. A maximum dumping height of 10 cm has proven to be advantageous for calcium carbonate. Since only residual moisture has to be removed with this apparatus, very high outputs are not required. A few kW are sufficient, but 25 kW to over 100 kW can be used.
  • the calcium carbonate dried according to the invention can be used as a rheology-controlling additive e.g. B. in sealants or adhesives.
  • the ultra-dry calcium carbonate can e.g. B. in 1-component or 2-component polyurethane sealants, in silicone sealants or modified silicone sealants, especially MS polymer sealants can be used as an additive.
  • the belt system drying is a static drying, d. H. the product is not subject to mechanical stress.
  • a temperature gradient directed towards the surface i. H. a higher temperature inside than on the surface and an associated higher partial pressure that transports the liquid to be evaporated to the surface.
  • the partial pressure generated by the microwaves in the core accelerates the diffusion processes.
  • Pre-dried CaC0 3 was dried on a conveyor belt system in a microwave channel (max. Power: 6 kW / 2450 MHz) with an active length of 2 m.
  • Tables 1 and 2 show the drying results under different conditions:

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Drying Of Solid Materials (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Sealing Material Composition (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne des particules de carbonate de calcium ultra-sèches et un procédé de séchage de particules de carbonate de calcium, ainsi que l'utilisation de ce carbonate de calcium. Selon l'invention, des particules de carbonate de calcium sont séchées au moyen de micro-ondes. Le séchage peut être effectué dans un dispositif de passage de bande, dans un dispositif à chambre ou dans un dispositif à chambre tournante. Les particules de carbonate de calcium fabriquées selon l'invention peuvent présenter un degré de dessèchement de 0 à 0,1 % de H2O.
EP03789124A 2002-12-11 2003-12-04 Carbonate de calcium ultra-sec Withdrawn EP1572589A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10257696A DE10257696A1 (de) 2002-12-11 2002-12-11 Ultratrockenes Calciumcarbonat
DE10257696 2002-12-11
PCT/EP2003/013663 WO2004052784A2 (fr) 2002-12-11 2003-12-04 Carbonate de calcium ultra-sec

Publications (1)

Publication Number Publication Date
EP1572589A2 true EP1572589A2 (fr) 2005-09-14

Family

ID=32336181

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03789124A Withdrawn EP1572589A2 (fr) 2002-12-11 2003-12-04 Carbonate de calcium ultra-sec

Country Status (17)

Country Link
US (1) US20050276897A1 (fr)
EP (1) EP1572589A2 (fr)
JP (1) JP2006509704A (fr)
KR (1) KR20050088425A (fr)
CN (1) CN100448777C (fr)
AU (1) AU2003293758A1 (fr)
BR (1) BR0317136A (fr)
CA (1) CA2509394A1 (fr)
DE (1) DE10257696A1 (fr)
HR (1) HRP20050521A2 (fr)
IL (1) IL169086A0 (fr)
MX (1) MXPA05006233A (fr)
PL (1) PL377383A1 (fr)
RS (1) RS20050448A (fr)
RU (1) RU2347164C2 (fr)
WO (1) WO2004052784A2 (fr)
ZA (1) ZA200504655B (fr)

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* Cited by examiner, † Cited by third party
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CN101090949B (zh) * 2004-12-22 2013-06-05 索尔维公司 碱土金属碳酸盐的耐酸粒子
DE602005026829D1 (de) * 2005-11-29 2011-04-21 Trading Engineering Technologies Llc Trockner und Verfahren zur Trocknung von gefälltem Calciumcarbonat
EP1795502A1 (fr) * 2005-12-12 2007-06-13 SOLVAY (Société Anonyme) Particules de carbonate de calcium précipité, leur procédé de préparation et leur utillisation comme charges
DE102007018975A1 (de) * 2007-04-07 2008-10-09 Schaefer Kalk Gmbh & Co. Kg Kugelförmige Calciumcarbonat-Teilchen
TWI510432B (zh) * 2010-04-09 2015-12-01 Omya Int Ag 經表面改質碳酸鈣在黏著劑、密封劑及／或填隙劑中之用途
JP5964012B2 (ja) * 2011-01-17 2016-08-03 丸尾カルシウム株式会社 表面処理重質炭酸カルシウム、その製造方法、及び該炭酸カルシウムを配合した樹脂組成物
ES2549029T3 (es) 2011-05-16 2015-10-22 Omya International Ag Método para la producción de carbonato de calcio precipitado a partir de desecho de la molienda de pulpa
SI2626388T1 (sl) 2012-02-09 2016-08-31 Omya International Ag Sestavek in metoda za nadzor omočljivosti površin
KR102062113B1 (ko) * 2012-07-18 2020-01-03 마루오 칼슘 가부시키가이샤 중질 탄산 칼슘, 그 제조 방법 및 이 탄산 칼슘을 함유한 수지 조성물
EP2982247A1 (fr) * 2014-08-07 2016-02-10 Omya International AG Produit antiseptique, son procédé de préparation et son utilisation
CN104448938A (zh) * 2014-11-18 2015-03-25 江苏群鑫粉体材料有限公司 胶粘剂用超细活性重质碳酸钙的生产方法
KR101645895B1 (ko) * 2015-08-27 2016-08-04 정충의 Ca계 폐기물과 소석회를 이용 이산화탄소 제거 및 부산물 처리방법
KR101658509B1 (ko) * 2015-08-27 2016-09-21 정충의 소석회를 이용 이산화탄소 제거 및 부산물 처리방법
KR101645896B1 (ko) * 2015-08-27 2016-08-04 정충의 Ca계 폐기물을 이용 이산화탄소 제거 및 부산물 처리방법
EP3192839B1 (fr) * 2016-01-14 2023-03-08 Omya International AG Traitement d'alcoxysilane d'un matériau comprenant du carbonate de calcium
KR102155067B1 (ko) * 2018-11-30 2020-09-11 한국생산기술연구원 이차원 탄산칼슘 나노시트의 제조방법 및 그에 따라 제조된 이차원 탄산칼슘 나노시트

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Also Published As

Publication number Publication date
DE10257696A9 (de) 2005-07-28
AU2003293758A1 (en) 2004-06-30
RU2347164C2 (ru) 2009-02-20
JP2006509704A (ja) 2006-03-23
US20050276897A1 (en) 2005-12-15
MXPA05006233A (es) 2005-12-05
RU2005121534A (ru) 2006-01-20
CN100448777C (zh) 2009-01-07
CN1723173A (zh) 2006-01-18
CA2509394A1 (fr) 2005-06-09
RS20050448A (sr) 2007-08-03
WO2004052784A3 (fr) 2004-11-18
PL377383A1 (pl) 2006-02-06
HK1081939A1 (zh) 2006-05-26
AU2003293758A8 (en) 2004-06-30
BR0317136A (pt) 2005-10-25
WO2004052784A2 (fr) 2004-06-24
ZA200504655B (en) 2006-04-26
HRP20050521A2 (en) 2005-08-31
IL169086A0 (en) 2009-02-11
KR20050088425A (ko) 2005-09-06
DE10257696A1 (de) 2004-06-24

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