CN105883880A - Preparation method of sheet superfine calcium carbonate for paper coating - Google Patents
Preparation method of sheet superfine calcium carbonate for paper coating Download PDFInfo
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- CN105883880A CN105883880A CN201610218715.3A CN201610218715A CN105883880A CN 105883880 A CN105883880 A CN 105883880A CN 201610218715 A CN201610218715 A CN 201610218715A CN 105883880 A CN105883880 A CN 105883880A
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- Prior art keywords
- calcium carbonate
- preparation
- product
- sheet
- paper coating
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 44
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000011248 coating agent Substances 0.000 title claims abstract description 15
- 238000000576 coating method Methods 0.000 title claims abstract description 15
- 239000002253 acid Substances 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 235000019738 Limestone Nutrition 0.000 claims abstract description 8
- 239000006028 limestone Substances 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 5
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 5
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 5
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 239000000725 suspension Substances 0.000 claims abstract description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 12
- -1 polyoxy Propylene ether Polymers 0.000 claims description 10
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 8
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 8
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 8
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- QQGRFMIMXPWKPM-UHFFFAOYSA-N 2,3,4-tributylphenol Chemical compound CCCCC1=CC=C(O)C(CCCC)=C1CCCC QQGRFMIMXPWKPM-UHFFFAOYSA-N 0.000 claims description 4
- JOOXCMJARBKPKM-UHFFFAOYSA-N 4-oxopentanoic acid Chemical compound CC(=O)CCC(O)=O JOOXCMJARBKPKM-UHFFFAOYSA-N 0.000 claims description 4
- 108010010803 Gelatin Proteins 0.000 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- 238000003763 carbonization Methods 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 4
- 229930195729 fatty acid Natural products 0.000 claims description 4
- 239000000194 fatty acid Substances 0.000 claims description 4
- 229920000159 gelatin Polymers 0.000 claims description 4
- 239000008273 gelatin Substances 0.000 claims description 4
- 235000019322 gelatine Nutrition 0.000 claims description 4
- 235000011852 gelatine desserts Nutrition 0.000 claims description 4
- 235000011187 glycerol Nutrition 0.000 claims description 4
- 239000004310 lactic acid Substances 0.000 claims description 4
- 235000014655 lactic acid Nutrition 0.000 claims description 4
- 235000006408 oxalic acid Nutrition 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- QWUWMCYKGHVNAV-UHFFFAOYSA-N 1,2-dihydrostilbene Chemical group C=1C=CC=CC=1CCC1=CC=CC=C1 QWUWMCYKGHVNAV-UHFFFAOYSA-N 0.000 claims description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- 125000002592 cumenyl group Chemical group C1(=C(C=CC=C1)*)C(C)C 0.000 claims description 3
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- 239000000047 product Substances 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 1
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 239000012467 final product Substances 0.000 abstract 1
- 239000004571 lime Substances 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000004381 surface treatment Methods 0.000 abstract 1
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 235000012204 lemonade/lime carbonate Nutrition 0.000 description 2
- 229920001451 polypropylene glycol Polymers 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 125000002877 alkyl aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- ZZVUWRFHKOJYTH-UHFFFAOYSA-N diphenhydramine Chemical compound C=1C=CC=CC=1C(OCCN(C)C)C1=CC=CC=C1 ZZVUWRFHKOJYTH-UHFFFAOYSA-N 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
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
- C01F11/182—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by an additive other than CaCO3-seeds
- C01F11/183—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by an additive other than CaCO3-seeds the additive being an organic compound
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Paper (AREA)
Abstract
The invention discloses a preparation method of sheet superfine calcium carbonate for paper coating. The preparation method of sheet superfine calcium carbonate for paper coating comprises steps as follows: (1) qualified limestone is put into a calcinator, superheated steam at the pressure of 3.6-3.9 Mpa is introduced, the pressure inside the calcinator is reduced to 2.3-3.1 MPa through a regulating valve, and heating is performed to slake the limestone; (2) multistage separation is performed to remove impurity particles in a calcined product, and a calcium hydroxide suspension is obtained and diluted to 1.5-4.5 mol/L; (3) sufficient carbon monoxide is introduced and a crystal forming agent is added till the product is thoroughly carbonized; (4) acid liquid is mixed in a product obtained in the step (3), lime kiln gas is introduced, the mixture is fully stirred for 10-20 minutes, and the weight ratio of the mixed acid liquid to the product obtained in the step (3) is 1:15-1:20; (5) the product obtained in the step (4) is dehydrated, dried and subjected to surface treatment, and sheet superfine calcium carbonate for paper coating is obtained. The preparation method has the advantages that the obtained final product has excellent quality, high yield, small influence on environment pollution and better technological effect.
Description
Technical field
The present invention relates to the preparation method of a kind of papermaking coating flake ultrafine calcium carbonate, belong to calcium
The preparing technical field of carbonate.
Background technology
Calcium carbonate superfine powder refers to primary partical particle diameter calcium carbonate between 0.02-0.1 μm, is day
Originally take the lead in developing, be the most cheap a kind of nano material, the special amount that it is had
Sub-dimensional effect, small-size effect, skin effect so that it is mending compared with conventional powder material
The aspects such as epistasis, the transparency, dispersibility, thixotropy and levelability all demonstrate obvious advantage,
Especially active superfine calcium carbonate, has the feature of functional stuffing, thus has significantly widened it and answered
By scope, its toughened and reinforced effect significantly improve and improve relevant industries properties of product and
Quality.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of papermaking coating flake ultrafine carbonic acid
The preparation method of calcium.
The present invention is achieved through the following technical solutions.
A kind of preparation method of papermaking coating flake ultrafine calcium carbonate, step includes:
(1) limestone qualified for quality is inserted in calcining furnace, be passed through 3.6-3.9Mpa overheated
Steam, the pressure in calcining furnace is reduced to 2.3～3.1MPa, carries out heating and make stone by regulation valve
Lime stone digests；
(2) multiple stage separation removes the impurity particle of calcined material, obtains calcium hydroxide suspension also
It is diluted to 1.5-4.5mol/L；
(3) it is passed through enough CO (carbon monoxide converter) gas, and adds into brilliant agent until carbonization is complete,
Brilliant agent is become to include 10%-20% ethylene glycol, OPEO by mass percentage
5%-10%, dibenzyl cumenyl phenol 1%-5%, double, tributyl phenol polyoxyethylene ether
1%-5%, gelatin 30%-50%, triethanolamine 10%-20%, glycerin polyoxyethylene ether polyoxy
Propylene ether fatty acid ester 10%-15%, sodium alklyarylsulfonate 10%-15%；
(4) in the product that (3) obtain, enter mix acid liquor, and be passed through lime-kiln gas and be allowed to
PH value, at 6.5-6.8, is sufficiently stirred for 10-20 minute, mix acid liquor and the weight of (3) product
Amount ratio at 1:15-1:20, mix acid liquor include percentage by weight levulic acid 10%-20%,
Lactic acid 30%-50%, oxalic acid 30%-40%；
(5) product that (4) obtain was entered dehydration, be dried, surface process after obtain papermaking
It is coated with flake ultrafine calcium carbonate.
Further, (1) heating and temperature control is at 800 DEG C-1200 DEG C.
Further, the product that (1) is first obtained before multiple stage separation removes calcined material by (2)
Pulverize.
Further, the pulverizing of (2): the float (1) obtained sends into high-speed cutting powder
Broken machine, by rotational speed regulation to 6000-7000 rev/min, is crushed to particle diameter in 50 μm
Below.
Further, (2) multiple stage separation uses the operation of multistage rotary filter press.
Beneficial effects of the present invention:
The selection becoming brilliant agent is more fitted whole technological process, got to the crystallization control that selection is definite
Preparation controls the effect of calcium carbonate granule pattern, it is thus achieved that end product quality is outstanding, yield rate
Height, environmental pollution impact simultaneously is little, and technological effect is preferable.
Detailed description of the invention
Below according to embodiment, the present invention is described in further detail.
Case study on implementation 1:
The papermaking coating preparation method of flake ultrafine calcium carbonate, step includes:
(1) limestone qualified for quality is inserted in calcining furnace, is passed through 3.7Mpa superheated steam,
Pressure in calcining furnace is reduced to 2.5MPa by regulation valve, carries out heating and makes lime carbonate slaking,
Heating and temperature control is at 800 DEG C-1200 DEG C；
(2) product first (1) obtained is pulverized, and the float (1) obtained sends into height
Speed cutting mill, by rotational speed regulation to 6000-7000 rev/min, is crushed to particle diameter and is existed
Below 50 μm, multistage rotary filter press removes the impurity particle of calcined material, obtains calcium hydroxide and hangs
Supernatant liquid is also diluted to 4.0mol/L；
(3) it is passed through enough CO (carbon monoxide converter) gas, and adds into brilliant agent until carbonization is complete,
Brilliant agent is become to include 15% ethylene glycol, OPEO 8%, dibenzyl by mass percentage
Base cumenyl phenol 3%, double, tributyl phenol polyoxyethylene ether 4%, gelatin 33%, three second
Hydramine 15%, glycerin polyoxyethylene ether polyoxypropylene ether fatty acid ester 10%, alkylaryl sulphur
Acid sodium 12%；
(4) in the product that (3) obtain, enter mix acid liquor, and be passed through lime-kiln gas and be allowed to
PH value, at 6.5-6.8, is sufficiently stirred for 10-20 minute, mix acid liquor and the weight of (3) product
Amount ratio is at 1:15-1:20, and mix acid liquor includes the levulic acid 15% of percentage by weight, lactic acid
45%, oxalic acid 40%；
(5) product that (4) obtain was entered dehydration, be dried, surface process after obtain papermaking
It is coated with flake ultrafine calcium carbonate.
Case study on implementation 2:
The papermaking coating preparation method of flake ultrafine calcium carbonate, step includes:
(1) limestone qualified for quality is inserted in calcining furnace, is passed through 3.8Mpa superheated steam,
Pressure in calcining furnace is reduced to 3.0MPa by regulation valve, carries out heating and makes lime carbonate slaking,
Heating and temperature control is at 800 DEG C-1200 DEG C；
(2) product first (1) obtained is pulverized, and the float (1) obtained sends into height
Speed cutting mill, by rotational speed regulation to 6000-7000 rev/min, is crushed to particle diameter and is existed
Below 50 μm, multistage rotary filter press removes the impurity particle of calcined material, obtains calcium hydroxide and hangs
Supernatant liquid is also diluted to 4.0mol/L；
(3) it is passed through enough CO (carbon monoxide converter) gas, and adds into brilliant agent until carbonization is complete,
Brilliant agent is become to include 13% ethylene glycol, OPEO 10%, two by mass percentage
Benzyl cumenyl phenol 5%, double, tributyl phenol polyoxyethylene ether 4%, gelatin 31%, three
Ethanolamine 10%, glycerin polyoxyethylene ether polyoxypropylene ether fatty acid ester 15%, alkylaryl
Sodium sulfonate 12%；
(4) in the product that (3) obtain, enter mix acid liquor, and be passed through lime-kiln gas and be allowed to
PH value, at 6.5-6.8, is sufficiently stirred for 10-20 minute, mix acid liquor and the weight of (3) product
Amount ratio is at 1:15-1:20, and mix acid liquor includes the levulic acid 20% of percentage by weight, lactic acid
50%, oxalic acid 30%；
(5) product that (4) obtain was entered dehydration, be dried, surface process after obtain papermaking
It is coated with flake ultrafine calcium carbonate.
Above-described embodiment, only for technology design and the feature of the explanation present invention, its object is to allow ripe
The personage knowing this art will appreciate that present invention and is carried out, and can not limit with this
Protection scope of the present invention processed.All equivalences made according to spirit of the invention change or repair
Decorations, all should contain within the scope of the present invention.
Claims (5)
1. the papermaking coating preparation method of flake ultrafine calcium carbonate, it is characterised in that step
Including:
(1) limestone qualified for quality is inserted in calcining furnace, be passed through 3.6-3.9Mpa overheated
Steam, the pressure in calcining furnace is reduced to 2.3～3.1MPa, carries out heating and make stone by regulation valve
Lime stone digests；
(2) multiple stage separation removes the impurity particle of calcined material, obtains calcium hydroxide suspension also
It is diluted to 1.5-4.5mol/L；
(3) it is passed through enough CO (carbon monoxide converter) gas, and adds into brilliant agent until carbonization is complete,
Brilliant agent is become to include 10%-20% ethylene glycol, OPEO by mass percentage
5%-10%, dibenzyl cumenyl phenol 1%-5%, double, tributyl phenol polyoxyethylene ether
1%-5%, gelatin 30%-50%, triethanolamine 10%-20%, glycerin polyoxyethylene ether polyoxy
Propylene ether fatty acid ester 10%-15%, sodium alklyarylsulfonate 10%-15%；
(4) in the product that (3) obtain, enter mix acid liquor, and be passed through lime-kiln gas and be allowed to
PH value, at 6.5-6.8, is sufficiently stirred for 10-20 minute, mix acid liquor and the weight of (3) product
Amount ratio at 1:15-1:20, mix acid liquor include percentage by weight levulic acid 10%-20%,
Lactic acid 30%-50%, oxalic acid 30%-40%；
(5) product that (4) obtain was entered dehydration, be dried, surface process after obtain papermaking
It is coated with flake ultrafine calcium carbonate.
The preparation method of papermaking coating flake ultrafine calcium carbonate the most according to claim 1,
It is characterized in that, (1) heating and temperature control is at 800 DEG C-1200 DEG C.
The preparation method of papermaking coating flake ultrafine calcium carbonate the most according to claim 1,
It is characterized in that, the product powder that (1) is first obtained before multiple stage separation removes calcined material by (2)
Broken.
The preparation method of papermaking coating flake ultrafine calcium carbonate the most according to claim 3,
It is characterized in that, the pulverizing of (2): the float (1) obtained is sent into high-speed cutting and pulverized
Machine, by rotational speed regulation to 6000-7000 rev/min, be crushed to particle diameter 50 μm with
Under.
The preparation method of papermaking coating flake ultrafine calcium carbonate the most according to claim 1,
It is characterized in that, (2) multiple stage separation uses the operation of multistage rotary filter press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610218715.3A CN105883880A (en) | 2016-04-07 | 2016-04-07 | Preparation method of sheet superfine calcium carbonate for paper coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610218715.3A CN105883880A (en) | 2016-04-07 | 2016-04-07 | Preparation method of sheet superfine calcium carbonate for paper coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105883880A true CN105883880A (en) | 2016-08-24 |
Family
ID=57012549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610218715.3A Pending CN105883880A (en) | 2016-04-07 | 2016-04-07 | Preparation method of sheet superfine calcium carbonate for paper coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105883880A (en) |
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|---|---|---|---|---|
| CN1080909A (en) * | 1993-07-15 | 1994-01-19 | 北京化工学院 | Preparation method of flaky crystal light calcium carbonate |
| CN1178545A (en) * | 1995-03-15 | 1998-04-08 | 矿业技术有限公司 | Recycling of mineral fillers from residue of paper deinking plant |
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| CN1262223A (en) * | 1999-12-29 | 2000-08-09 | 李根福 | Process for preparing nm-class calcium carbonate by ultrasonic cavitation technique |
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| CN1552959A (en) * | 2003-05-26 | 2004-12-08 | 青海海兴科技开发有限公司 | Preparing process for calcium carbonate crystal whisker |
| CN1657413A (en) * | 2004-12-03 | 2005-08-24 | 天津化工研究设计院 | Preparation method of lamellar crystal light calcium carbonate for paper making coating |
| CN101475199A (en) * | 2009-01-21 | 2009-07-08 | 山东海泽纳米材料有限公司 | Industrial preparation of calcium carbonate nano bead string |
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| CN101575114A (en) * | 2009-03-30 | 2009-11-11 | 上海东升新材料有限公司 | Light calcium carbonate carbonizing plant and industrial application thereof |
| CN101774623A (en) * | 2010-01-19 | 2010-07-14 | 上海卓越纳米新材料股份有限公司 | Industrial preparation method of rice-shaped ultra-fine activated calcium carbonate |
| CN102674423A (en) * | 2012-04-17 | 2012-09-19 | 池州凯尔特纳米科技有限公司 | Preparation method of flake superfine calcium carbonate for paper coating |
| CN103153863A (en) * | 2009-12-14 | 2013-06-12 | 卡西技术合成矿物有限公司 | Production of calcium carbonate from waste sludge |
| CN103717681A (en) * | 2011-06-21 | 2014-04-09 | 欧米亚国际集团 | Process for the production of precipitated calcium carbonate, precipitated calcium carbonate and uses thereof |
-
2016
- 2016-04-07 CN CN201610218715.3A patent/CN105883880A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080909A (en) * | 1993-07-15 | 1994-01-19 | 北京化工学院 | Preparation method of flaky crystal light calcium carbonate |
| CN1178545A (en) * | 1995-03-15 | 1998-04-08 | 矿业技术有限公司 | Recycling of mineral fillers from residue of paper deinking plant |
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