EP1572589A2 - Ultra-dry calcium carbonate - Google Patents
Ultra-dry calcium carbonateInfo
- 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- Withdrawn
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)
- Compositions Of Macromolecular Compounds (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Sealing Material Composition (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10257696 | 2002-12-11 | ||
DE10257696A DE10257696A1 (en) | 2002-12-11 | 2002-12-11 | Ultradry calcium carbonate useful as rheology-controlling additive in sealants and adhesives |
PCT/EP2003/013663 WO2004052784A2 (en) | 2002-12-11 | 2003-12-04 | Ultra-dry calcium carbonate |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1572589A2 true EP1572589A2 (en) | 2005-09-14 |
Family
ID=32336181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03789124A Withdrawn EP1572589A2 (en) | 2002-12-11 | 2003-12-04 | Ultra-dry calcium carbonate |
Country Status (18)
Country | Link |
---|---|
US (1) | US20050276897A1 (en) |
EP (1) | EP1572589A2 (en) |
JP (1) | JP2006509704A (en) |
KR (1) | KR20050088425A (en) |
CN (1) | CN100448777C (en) |
AU (1) | AU2003293758A1 (en) |
BR (1) | BR0317136A (en) |
CA (1) | CA2509394A1 (en) |
DE (1) | DE10257696A1 (en) |
HK (1) | HK1081939A1 (en) |
HR (1) | HRP20050521A2 (en) |
IL (1) | IL169086A0 (en) |
MX (1) | MXPA05006233A (en) |
PL (1) | PL377383A1 (en) |
RS (1) | RS20050448A (en) |
RU (1) | RU2347164C2 (en) |
WO (1) | WO2004052784A2 (en) |
ZA (1) | ZA200504655B (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20070099571A (en) * | 2004-12-22 | 2007-10-09 | 솔베이(소시에떼아노님) | Acid resistant particles of an alkaline earth metal carbonate |
DE602005026829D1 (en) * | 2005-11-29 | 2011-04-21 | Trading Engineering Technologies Llc | Dryers and process for drying precipitated calcium carbonate |
EP1795502A1 (en) * | 2005-12-12 | 2007-06-13 | SOLVAY (Société Anonyme) | Particles of precipitated calcium carbonate, process for making the particles and use of the particles as filler |
DE102007018975A1 (en) * | 2007-04-07 | 2008-10-09 | Schaefer Kalk Gmbh & Co. Kg | Spherical calcium carbonate particles |
TWI510432B (en) * | 2010-04-09 | 2015-12-01 | Omya Int Ag | Use of surface modified calcium carbonate in adhesives, sealants and/or caulks |
JP5964012B2 (en) * | 2011-01-17 | 2016-08-03 | 丸尾カルシウム株式会社 | Surface-treated heavy calcium carbonate, method for producing the same, and resin composition containing the calcium carbonate |
PT2524898E (en) | 2011-05-16 | 2015-11-03 | Omya Int Ag | Method for the production of precipitated calcium carbonate from pulp mill waste |
EP2626388B1 (en) | 2012-02-09 | 2016-05-04 | Omya International AG | A composition and method for controlling the wettability of surfaces |
US9815971B2 (en) * | 2012-07-18 | 2017-11-14 | Maruo Calcium Co., Ltd. | Heavy calcium carbonate, production method therefor, and resin composition containing said calcium carbonate |
EP2982247A1 (en) * | 2014-08-07 | 2016-02-10 | Omya International AG | Antiseptic product, process for preparing same and its use |
CN104448938A (en) * | 2014-11-18 | 2015-03-25 | 江苏群鑫粉体材料有限公司 | Production method of ultrafine active heavy calcium carbonate for adhesives |
KR101645896B1 (en) * | 2015-08-27 | 2016-08-04 | 정충의 | Ca-based carbon dioxide removal using waste and by-product processing method |
KR101658509B1 (en) * | 2015-08-27 | 2016-09-21 | 정충의 | Carbon dioxide removed using calcium hydroxide by-product and processing method |
KR101645895B1 (en) * | 2015-08-27 | 2016-08-04 | 정충의 | Ca-based waste and carbon dioxide removed using calcium hydroxide and by-product processing method |
ES2944933T3 (en) * | 2016-01-14 | 2023-06-27 | Omya Int Ag | Alkoxysilane treatment of a material comprising calcium carbonate |
KR102155067B1 (en) * | 2018-11-30 | 2020-09-11 | 한국생산기술연구원 | manufacturing method for two-dimensional calcium carbonate nano sheet and two-dimensional calcium carbonate nano sheet manufactured thereby |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3545093A (en) * | 1968-12-23 | 1970-12-08 | Exxon Research Engineering Co | Microwave vibrating resonating cavity and drying process |
US4244933A (en) * | 1978-04-05 | 1981-01-13 | Shiraishi Kogyo Kaisha, Ltd. | Calcium carbonate particles and processes for preparing same |
US4427811A (en) * | 1981-12-30 | 1984-01-24 | Dow Corning Corporation | Silicone elastomeric emulsion having improved shelf life |
FR2570721B1 (en) * | 1984-09-25 | 1988-01-08 | Condat Papeteries | PROCESS FOR ENHANCING LIME SLUDGE IN THE CAUSTIFICATION CYCLE OF THE KRAFT PROCESS |
GB8724959D0 (en) * | 1987-10-24 | 1987-11-25 | Dow Corning Sa | Filled compositions |
US5064893A (en) * | 1990-03-08 | 1991-11-12 | Rexene Corporation | Flexible label film from polyethylene and calcium carbonate-polymer mixture |
WO1993003834A1 (en) * | 1991-08-20 | 1993-03-04 | Mann, Alexander | Processing moist granules with electromagnetic waves |
JP2675465B2 (en) * | 1991-11-01 | 1997-11-12 | 工業技術院長 | Hydrous calcium carbonate and method for producing the same |
DE69323960T2 (en) * | 1992-11-25 | 1999-11-11 | Gen Electric | One-component composition vulcanizing at room temperature |
US5616647A (en) * | 1992-11-25 | 1997-04-01 | General Electric Company | One part room temperature vulcanizing composition having both a high rate of extrusion and low sag |
JP3295673B2 (en) * | 1993-03-26 | 2002-06-24 | 同和鉄粉工業株式会社 | Iron powder production using microwaves |
US5378319A (en) * | 1993-05-07 | 1995-01-03 | Tran Industrial Research Inc. | Lime mud calcining using dielectric hysteresis heating |
EP0795588B1 (en) * | 1996-03-13 | 2001-07-18 | Omya Ag | Coating |
CN1087763C (en) * | 1998-09-11 | 2002-07-17 | 黄万东 | Double-component polyurethane paste for sealing in building and its production process |
US6383324B1 (en) * | 1999-11-24 | 2002-05-07 | Morton International, Inc. | Polysulfide-based polyurethane sealant for insulating glass |
EP1118636A1 (en) * | 2000-01-20 | 2001-07-25 | SOLVAY (Société Anonyme) | Filled caprolactone based polymer compositions, process for their preparation and articles made thereform |
CN1170901C (en) * | 2000-12-13 | 2004-10-13 | 北京市建筑材料科学研究院 | Solvent free mono-composition poyurethane water-proof paint |
CN1272250C (en) * | 2001-10-31 | 2006-08-30 | 科学和工业研究会 | Process for generation of finely divided calcium carbonate from calcium carbonate rich industrial by-product |
-
2002
- 2002-12-11 DE DE10257696A patent/DE10257696A1/en not_active Withdrawn
-
2003
- 2003-12-04 PL PL377383A patent/PL377383A1/en not_active Application Discontinuation
- 2003-12-04 RS YUP-2005/0448A patent/RS20050448A/en unknown
- 2003-12-04 CN CNB2003801056220A patent/CN100448777C/en not_active Expired - Fee Related
- 2003-12-04 CA CA002509394A patent/CA2509394A1/en not_active Abandoned
- 2003-12-04 MX MXPA05006233A patent/MXPA05006233A/en unknown
- 2003-12-04 WO PCT/EP2003/013663 patent/WO2004052784A2/en active Application Filing
- 2003-12-04 JP JP2004557985A patent/JP2006509704A/en active Pending
- 2003-12-04 EP EP03789124A patent/EP1572589A2/en not_active Withdrawn
- 2003-12-04 AU AU2003293758A patent/AU2003293758A1/en not_active Abandoned
- 2003-12-04 KR KR1020057010635A patent/KR20050088425A/en not_active Application Discontinuation
- 2003-12-04 RU RU2005121534/15A patent/RU2347164C2/en active
- 2003-12-04 BR BR0317136-1A patent/BR0317136A/en not_active Application Discontinuation
-
2005
- 2005-06-07 ZA ZA200504655A patent/ZA200504655B/en unknown
- 2005-06-09 IL IL169086A patent/IL169086A0/en unknown
- 2005-06-09 HR HR20050521A patent/HRP20050521A2/en not_active Application Discontinuation
- 2005-06-10 US US11/149,296 patent/US20050276897A1/en not_active Abandoned
-
2006
- 2006-02-20 HK HK06102215.9A patent/HK1081939A1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2004052784A2 * |
Also Published As
Publication number | Publication date |
---|---|
DE10257696A9 (en) | 2005-07-28 |
RU2347164C2 (en) | 2009-02-20 |
WO2004052784A3 (en) | 2004-11-18 |
RU2005121534A (en) | 2006-01-20 |
US20050276897A1 (en) | 2005-12-15 |
PL377383A1 (en) | 2006-02-06 |
RS20050448A (en) | 2007-08-03 |
HRP20050521A2 (en) | 2005-08-31 |
BR0317136A (en) | 2005-10-25 |
AU2003293758A1 (en) | 2004-06-30 |
KR20050088425A (en) | 2005-09-06 |
HK1081939A1 (en) | 2006-05-26 |
WO2004052784A2 (en) | 2004-06-24 |
MXPA05006233A (en) | 2005-12-05 |
CA2509394A1 (en) | 2005-06-09 |
JP2006509704A (en) | 2006-03-23 |
AU2003293758A8 (en) | 2004-06-30 |
CN1723173A (en) | 2006-01-18 |
CN100448777C (en) | 2009-01-07 |
IL169086A0 (en) | 2009-02-11 |
DE10257696A1 (en) | 2004-06-24 |
ZA200504655B (en) | 2006-04-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20050711 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: DILLENBURG, HELMUT Inventor name: NOVER, CHRISTOPH |
|
17Q | First examination report despatched |
Effective date: 20080414 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20100518 |