CN113549341A - Preparation method of core-shell type silicon dioxide coated nano calcium carbonate - Google Patents
Preparation method of core-shell type silicon dioxide coated nano calcium carbonate Download PDFInfo
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- CN113549341A CN113549341A CN202110708820.6A CN202110708820A CN113549341A CN 113549341 A CN113549341 A CN 113549341A CN 202110708820 A CN202110708820 A CN 202110708820A CN 113549341 A CN113549341 A CN 113549341A
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- calcium carbonate
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- silicon dioxide
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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 86
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 46
- 239000000377 silicon dioxide Substances 0.000 title claims abstract description 23
- 239000011258 core-shell material Substances 0.000 title claims abstract description 18
- 235000012239 silicon dioxide Nutrition 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 28
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 239000002002 slurry Substances 0.000 claims abstract description 17
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 14
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 11
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000032683 aging Effects 0.000 claims abstract description 10
- 238000003763 carbonization Methods 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000007670 refining Methods 0.000 claims abstract description 8
- 239000000725 suspension Substances 0.000 claims abstract description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 6
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 6
- 239000000292 calcium oxide Substances 0.000 claims abstract description 6
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 3
- 239000007822 coupling agent Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 7
- 235000019353 potassium silicate Nutrition 0.000 claims description 6
- 150000007524 organic acids Chemical class 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- RSWGJHLUYNHPMX-UHFFFAOYSA-N 1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid Chemical compound C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 4
- 239000004115 Sodium Silicate Substances 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 4
- 239000004111 Potassium silicate Substances 0.000 claims description 3
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 3
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 3
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 3
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 3
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 2
- 235000021355 Stearic acid Nutrition 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 2
- 239000008117 stearic acid Substances 0.000 claims description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 239000002253 acid Substances 0.000 abstract description 10
- 238000009776 industrial production Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003973 paint Substances 0.000 abstract description 3
- 239000004744 fabric Substances 0.000 abstract description 2
- 239000004816 latex Substances 0.000 abstract description 2
- 229920000126 latex Polymers 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000004945 emulsification Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 2
- 238000010000 carbonizing Methods 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- JUWGUJSXVOBPHP-UHFFFAOYSA-B titanium(4+);tetraphosphate Chemical compound [Ti+4].[Ti+4].[Ti+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O JUWGUJSXVOBPHP-UHFFFAOYSA-B 0.000 description 2
- 238000001132 ultrasonic dispersion Methods 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229910004074 SiF6 Inorganic materials 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012767 functional filler Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- -1 organic acid sodium oleate Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
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
- 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
- C09C1/022—Treatment with inorganic compounds
-
- 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
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
- C09C3/066—Treatment or coating resulting in a free metal containing surface-region
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Silicon Compounds (AREA)
Abstract
The invention relates to a preparation method of core-shell type silicon dioxide coated nano calcium carbonate, which comprises the following specific steps: firstly, slaking and refining quicklime into calcium hydroxide slurry, introducing cellar gas containing carbon dioxide, and then refining to form a nano calcium carbonate suspension; then adding silicate into the system, and stirring for reaction; generating core-shell type silicon dioxide coated nano calcium carbonate along with the carbonization reaction, then heating and adding a coating agent for coating treatment, and continuing the carbonization reaction for 2-3 h; and (3) aging the reaction system, and then filtering, washing and drying the obtained slurry to obtain the core-shell type silicon dioxide coated nano calcium carbonate. The product obtained by the invention has good acid resistance and dispersibility, the physical and chemical properties of the product are obviously improved, the operation is simple, the industrial production is easy, and the invention is applied to the fields of latex paint, manufacturing coating, fabric paper coating and the like.
Description
The technical field is as follows:
the invention relates to a preparation method of nano calcium carbonate, in particular to a preparation method of core-shell type silicon dioxide coated nano calcium carbonate.
Background art:
nano active calcium carbonate as a functional filler in paint, rubber, plastic and other industries3The surface of the material is adsorbed with a layer of calcium ions, which is alkalescent and has poor acid resistance, and the material can only be applied to a neutral or alkaline system, thereby limiting the application range. Nano CaCO surface treated by inorganic substance with good acid resistance3And a complete and compact coating layer is formed on the surface of the coating layer, so that the acid resistance of the coating layer can be improved. At present, the inorganic surface is modified with nano CaCO3The study of (2) is not many.
For this reason, attention has been paid to the study of the acid resistance of calcium carbonate, and US5043017 treated CaCO with hexametaphosphoric acid3The particles are applied to the manufacture of neutral paper and acid paper, obtain better effect, but have more pollution to water; h for Kim et al2SiF6·nH2O-modified CaCO3In CaCO3Surface coated with amorphous silicon (Si) and calcium fluoride (CaF)2) To a certain extent, improves CaCO3Acid resistance of (1), expected to broaden CaCO3The modifier can cause little environmental pollution in the application range. Chinese patent 02115028.1 describes a preparation method of adding sodium silicate to calcium carbonate slurry, then performing ultrasonic dispersion, then adding dilute sulfuric acid solution, and forming silica-coated calcium carbonate surface under strong stirring, which is difficult to be realized in large-scale industrial production by using ultrasonic dispersion, and meanwhile, the addition of strong acid sulfuric acid is easy to cause the calcium carbonate slurry to be dissolved due to excessive local acidity, and is not beneficial to industrial production.
The invention content is as follows:
the invention aims to provide a preparation method of core-shell silica coated nano calcium carbonate for overcoming the defects of the prior art.
The technical scheme of the invention is as follows: a preparation method of core-shell silica coated nano calcium carbonate comprises the following specific steps:
(1) slaking and refining quicklime into calcium hydroxide slurry, introducing cellar gas containing carbon dioxide at a controlled reaction temperature, and then refining to form a nano calcium carbonate suspension; adding silicate into the system, and stirring and reacting by using an emulsification pump;
(2) gradually reducing the pH value of the system along with the progress of the carbonization reaction, generating core-shell type silicon dioxide coated nano calcium carbonate when the pH value of the carbonization reaction system is 6.5-7, then heating to 40-70 ℃, adding a coating agent for coating treatment, continuing the carbonization reaction for 2-3h, and stopping introducing cellar gas containing carbon dioxide;
(3) and (3) aging the reaction system, and then filtering, washing and drying the obtained slurry to obtain the core-shell type silicon dioxide coated nano calcium carbonate.
Preferably, the reaction temperature in the step (1) is 15-35 ℃. Preferably, the weight solid content of the nano calcium carbonate suspension in the step (1) is 5.0-10.0%.
Preference is given to CO in the kiln gas2The volume concentration of (A) is 15-30%; the flow rate of cellar gas is 1-5 m/s.
Preferably, the silicate is water glass, sodium metasilicate or potassium silicate; silicate addition as CaCO3The weight is 2.0-5.0%.
Preferably, the coating agent is an aqueous solution with the mass concentration of 4-15% prepared by a coupling agent or organic acid; the addition amount of the coating agent is CaCO by controlling the addition weight of the solute3The weight is 2.0-5.0%. Preferably, the coupling agent is one of titanate coupling agents such as TC-311, titanate coupling agents such as TC-114, water-soluble borate coupling agents such as SBW-98, phosphate titanium coupling agents, water-soluble chelate-type phosphate titanium coupling agents such as 560; the organic acid is one of sodium oleate, stearic acid or resin acid rosin.
Preferably, the aging temperature is 40-50 ℃, and the aging time is 1.5-2.5 h.
Preferably, the drying temperature in the step (3) is 80-90 ℃, and the drying time is 1.5-3.5 h.
Has the advantages that:
the surface of the prepared nano calcium carbonate is uniformly coated with a layer of silica sol separated out by hydrolysis, so that the acid resistance of the nano calcium carbonate is improved; on the basis, the composite surface treatment of the coupling agent and the organic acid is carried out, the dispersibility of the product in the polymer is improved, and the core-shell type silicon dioxide coated nano calcium carbonate product with excellent quality is produced on an industrial device. The core-shell type silicon dioxide coated nanometer active calcium carbonate synthesized by the method has good acid resistance and dispersibility. The method is simple to operate and easy for industrial production. The method is applied to the fields of latex paint, manufacturing and coating, fabric paper coating and the like.
The specific implementation mode is as follows:
example 1
In a 30 cubic meter reaction kettle, a certain amount of quicklime is digested and refinedForming calcium hydroxide slurry, reacting at 35 deg.C, introducing cellar gas containing carbon dioxide, and introducing CO2At a flow rate of 1m/s, forming a suspension of nano calcium carbonate (25 cubic meters) with a solids content by weight of 5%, i.e. 1.38 tons. Adding 280 kg of water glass (the weight content of silicon dioxide is 25%) with the modulus of 3.1, controlling the pH to be 6.8 under the circulating action of a high-shear emulsification pump, hydrolyzing silicate under the action of carbon dioxide gas to separate out silica sol, and uniformly coating the silica sol on the surface of the nano calcium carbonate to form a layer of core-shell-shaped silicon dioxide coated on the nano calcium carbonate. The slurry is heated to 45 ℃, titanate coupling agent TC-311(35 kg of TC-311 is dissolved in 800 kg of water to prepare coating agent solution) is added for surface treatment, core-shell silica is obtained to be coated on the nano active calcium carbonate, and the reaction is finished after 3h of carbonization. Aging the reaction system at 40 ℃ for 2h, filtering the slurry, and drying at 90 ℃ for 3.5h to obtain the product. The oil absorption value of the product is 25.3 by adopting the method specified by Shanghai's enterprise standard (Q/IMOK 01-2007).
Example 2
Digesting and refining a certain amount of quicklime into calcium hydroxide slurry in a reaction kettle of 30 cubic meters at the reaction temperature of 25 ℃, introducing cellar gas containing carbon dioxide, CO2At a flow rate of 3m/s, forming a suspension of nano calcium carbonate (25 cubic meters) with a solids content by weight of 7%, i.e. 1.9 tons. Adding 75 kg of sodium metasilicate, controlling the pH to be 7 by carbonization under the circulating action of a high-shear emulsification pump, hydrolyzing the silicate under the action of carbon dioxide gas to separate out silica sol, and uniformly coating the silica sol on the surface of the nano calcium carbonate to form a layer of core-shell silica coated on the nano calcium carbonate. Heating the slurry to 60 ℃, adding a coupling agent TC-114(60 kilograms of TC-114 are dissolved in 750 kilograms of water to prepare a coating agent solution) for surface treatment to obtain core-shell-shaped silicon dioxide coated with nano activated calcium carbonate, carbonizing for 2.5 hours to finish reaction, aging a reaction system at 45 ℃ for 2 hours, filtering the slurry, and drying at 80 ℃ for 1.5 hours to obtain the product. The oil absorption value of the product is 24.2 by adopting the method specified by Shanghai's enterprise standard (Q/IMOK 01-2007).
Example 3
Digesting and refining a certain amount of quicklime into calcium hydroxide slurry in a reaction kettle of 30 cubic meters, wherein the reaction temperature is 15 ℃, introducing cellar gas containing carbon dioxide, and CO2At a flow rate of 5m/s, forming a suspension of nano calcium carbonate (25 cubic meters) with a solids content by weight of 10%, i.e. 2.8 tons. 60 kilograms of potassium silicate is added, the mixture is carbonized under the circulating action of a high-shear emulsification pump until the PH value is 6.6, and the silicate is hydrolyzed under the action of carbon dioxide gas to separate out silica sol which is uniformly coated on the surface of the nano calcium carbonate to form a layer of core-shell silica coated on the nano calcium carbonate. Heating the slurry to 650 ℃, adding organic acid sodium oleate (135 kg of sodium oleate is dissolved in 900 kg of water to prepare a coating agent solution) for surface treatment to obtain core-shell-shaped silicon dioxide coated with nano active calcium carbonate, carbonizing for 2h to finish the reaction, aging the reaction system at 50 ℃ for 2h, filtering the slurry, and drying at 85 ℃ for 2.5h to obtain the product. The oil absorption value of the product is 27.3 by adopting the method specified by Shanghai's enterprise standard (Q/IMOK 01-2007).
Claims (8)
1. A preparation method of core-shell silica coated nano calcium carbonate comprises the following specific steps:
(1) slaking and refining quicklime into calcium hydroxide slurry, introducing cellar gas containing carbon dioxide at a controlled reaction temperature, and then refining to form a nano calcium carbonate suspension; then adding silicate into the system, and stirring for reaction;
(2) with the progress of the carbonization reaction, when the pH value of a carbonization reaction system is 6.5-7, generating core-shell type silicon dioxide coated nano calcium carbonate, then heating to 40-70 ℃, adding a coating agent for coating treatment, continuing the carbonization reaction for 2-3h, and stopping introducing cellar gas containing carbon dioxide;
(3) and (3) aging the reaction system, and then filtering, washing and drying the obtained slurry to obtain the core-shell type silicon dioxide coated nano calcium carbonate.
2. The method according to claim 1, wherein the reaction temperature in the step (1) is 15 to 35 ℃.
3. The preparation method according to claim 1, wherein the weight solid content of the nano calcium carbonate suspension in the step (1) is 5.0-10.0%.
4. The method of claim 1, wherein the CO in the kiln gas is2The volume concentration of (A) is 15-30%; the flow rate of cellar gas is 1-5 m/s.
5. The method according to claim 1, wherein the silicate is water glass, sodium metasilicate or potassium silicate; silicate addition as CaCO3The weight is 2.0-5.0%.
6. The preparation method according to claim 1, wherein the coating agent is an aqueous solution with a mass concentration of 4-15% prepared from a coupling agent or an organic acid; the addition amount of the coating agent is CaCO by controlling the addition weight of the solute3The weight is 2.0-5.0%.
7. The method according to claim 6, wherein the coupling agent is a titanate coupling agent, a water-soluble borate coupling agent, or a silicone coupling agent; the organic acid is one of sodium oleate, stearic acid or resin acid rosin.
8. The method according to claim 1, wherein the aging temperature is 40 to 50 ℃ and the aging time is 1.5 to 2.5 hours.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113999543A (en) * | 2021-10-29 | 2022-02-01 | 广西华纳新材料科技有限公司 | Preparation method of calcium-silicon core-shell structure nano calcium carbonate |
| CN114604883A (en) * | 2022-03-16 | 2022-06-10 | 郭立杰 | Method for purifying whitening calcium carbonate by using core-shell structure |
| CN114853049A (en) * | 2022-05-30 | 2022-08-05 | 广西华纳新材料股份有限公司 | Preparation method of high-stability nano calcium carbonate |
| CN115057466A (en) * | 2022-08-04 | 2022-09-16 | 安徽进化硅纳米材料科技有限公司 | Modified nano zinc oxide composite material and preparation method and application thereof |
| CN115353752A (en) * | 2022-09-23 | 2022-11-18 | 广西华纳新材料股份有限公司 | Acid-resistant coated nano calcium carbonate and preparation method thereof |
| CN116731397A (en) * | 2023-07-20 | 2023-09-12 | 浙江钦堂钙业有限公司 | Modified shell-core structure calcium carbonate with flame retardant function |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114604883A (en) * | 2022-03-16 | 2022-06-10 | 郭立杰 | Method for purifying whitening calcium carbonate by using core-shell structure |
| CN114604883B (en) * | 2022-03-16 | 2023-09-08 | 郭立杰 | Method for purifying and whitening calcium carbonate by core-shell structure |
| CN114853049A (en) * | 2022-05-30 | 2022-08-05 | 广西华纳新材料股份有限公司 | Preparation method of high-stability nano calcium carbonate |
| CN114853049B (en) * | 2022-05-30 | 2023-11-03 | 广西华纳新材料股份有限公司 | Preparation method of high-stability nano calcium carbonate |
| CN115057466A (en) * | 2022-08-04 | 2022-09-16 | 安徽进化硅纳米材料科技有限公司 | Modified nano zinc oxide composite material and preparation method and application thereof |
| CN115057466B (en) * | 2022-08-04 | 2024-03-08 | 安徽进化硅纳米材料科技有限公司 | Modified nano zinc oxide composite material and preparation method and application thereof |
| CN115353752A (en) * | 2022-09-23 | 2022-11-18 | 广西华纳新材料股份有限公司 | Acid-resistant coated nano calcium carbonate and preparation method thereof |
| CN115353752B (en) * | 2022-09-23 | 2023-09-26 | 广西华纳新材料股份有限公司 | Acid-resistant coated nano calcium carbonate and preparation method thereof |
| CN116731397A (en) * | 2023-07-20 | 2023-09-12 | 浙江钦堂钙业有限公司 | Modified shell-core structure calcium carbonate with flame retardant function |
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