CN114212814A - Preparation method of nano calcium carbonate - Google Patents
Preparation method of nano calcium carbonate Download PDFInfo
- Publication number
- CN114212814A CN114212814A CN202111544971.9A CN202111544971A CN114212814A CN 114212814 A CN114212814 A CN 114212814A CN 202111544971 A CN202111544971 A CN 202111544971A CN 114212814 A CN114212814 A CN 114212814A
- Authority
- CN
- China
- Prior art keywords
- calcium carbonate
- carbon dioxide
- nano calcium
- preparing nano
- calcium
- 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.)
- Granted
Links
Images
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
-
- 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
- C01F11/181—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by control of the carbonation conditions
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Abstract
The invention discloses a preparation method of nano calcium carbonate, which takes calcium carbonate ore as a raw material, calcines the calcium carbonate ore to decompose the calcium carbonate ore into calcium oxide, then carries out digestion and aging, adds a crystal form control agent, and introduces carbon dioxide gas to carry out water bath reaction, monitors the pH value of the solution, continues introducing the carbon dioxide gas when the pH value reaches 7 to ensure that the carbon dioxide gas is over-carbonized until the pH value reaches 6 or below, stops introducing the gas, and carries out filtering, washing and drying in time to prepare the nano calcium carbonate. The invention continuously introduces carbon dioxide after the calcium hydroxide is consumed, so that the nanometer calcium carbonate at the weaker chain part in the chain nanometer calcium carbonate is re-dissolved to generate calcium bicarbonate, and the particles are separated to obtain the monodisperse nanometer calcium carbonate. The method is simple and controllable, is suitable for industrial production, and can prepare the nano calcium carbonate with good monodispersity and uniform particles.
Description
Technical Field
The invention belongs to the technical field of inorganic nano material preparation, and relates to a preparation method of nano calcium carbonate, in particular to a method for preparing nano calcium carbonate with uniform particles and good dispersibility based on over-carbonization.
Background
The nano calcium carbonate is a functional filling material, is widely applied to industries such as rubber, plastic, papermaking, adhesives and the like, can play a role in filling and reducing cost, has a semi-reinforcing or reinforcing role, and endows a matrix with a certain special function.
According to the production method, calcium carbonate can be classified into heavy calcium carbonate and light calcium carbonate, and the heavy calcium carbonate is obtained by reducing the particle size of calcium carbonate particles by physical grinding, and it is difficult to make the particle size of calcium carbonate less than 1000nm due to the limitation of grinding equipment. The light calcium carbonate is prepared by a chemical reaction method, and the prepared calcium carbonate is in a nanometer scale. Due to the nanometer size, the nanometer calcium carbonate has the properties of nanometer materials, such as volume effect, surface effect, quantum size effect and the like. The special properties of the nano calcium carbonate greatly develop the application field of the calcium carbonate.
Nano calcium carbonate, as an abrasive used in toothpaste, has a particle size that, if too large, tends to excessively abrade enamel, resulting in breakage and defects of the tooth surface, resulting in more stains and bacteria being attached and growing thereon. And the nano calcium carbonate can not cause excessive abrasion, and can be firmly adsorbed on the surface of the tooth or filled in an abrasion part to form a protective layer due to high surface activity. After other easily-corroded enamel components such as acid and the like enter the oral cavity, the teeth are protected from erosion, and then the nano calcium carbonate protective layer is supplemented while food residues are removed through tooth brushing.
At present, most of crystal form control agents adopted in industrial production of nano calcium carbonate are acid (sulfuric acid, acetic acid, phosphoric acid, pyrophosphoric acid and the like) and salt (sodium citrate, aluminum sulfate, zinc sulfate, sodium tripolyphosphate and the like), and the acid crystal form control agents influence the growth of the calcium carbonate through the adsorption of acid radical ions (sulfate radicals, carboxylic acid and the like); when the ions of the salt crystal form control agent and the ions of the calcium carbonate crystals are similar in crystal structure, mass points of the crystal form control agent are easy to enter the crystals, and the particles with the larger similarity are easy to enter the crystals, so that the internal structure of the crystals is changed, and meanwhile, the addition of the salt crystal form control agent can destroy the ionization balance of a system, change the nucleation rate, change the growth capability of crystal nuclei in certain directions, inhibit the growth in other directions, and generate the calcium carbonate with a specific shape. However, the waste liquid containing the crystal form control agents pollutes the environment, and is difficult to ensure complete removal in the cleaning process, and residues in the product may cause harm to human bodies, so that the product cannot be applied to the field of food and medicine, and the application range is limited. In addition, the existing preparation method of the nano calcium carbonate is often complicated in steps, so that the preparation method of the nano calcium carbonate provided by the invention is non-toxic and harmless and has extremely simple steps.
Disclosure of Invention
The invention aims to provide a method for preparing nano calcium carbonate aiming at the defects of the prior art, which is extremely simple, is suitable for industrial production, and can prepare the nano calcium carbonate with good monodispersity and uniform particles.
The technical scheme adopted by the invention is as follows:
a process for preparing nano calcium carbonate includes such steps as calcining calcium carbonate ore as raw material, decomposing to obtain calcium oxide, digesting, ageing, adding crystal-type control agent, introducing carbon dioxide gas for water bath reaction, monitoring pH value of solution, continuously introducing carbon dioxide gas for carbonizing until pH value is 6 or less, stopping introducing gas, filtering, washing and drying.
Specifically, calcium carbonate ore mined in a mine field can be subjected to preliminary crushing and screening, calcined and decomposed into calcium oxide, water is added to enable the mass fraction of the calcium oxide to be 3-5%, the calcium oxide is heated in a water bath at 70-80 ℃, and is fully digested under the stirring of 900-1000 rpm to obtain calcium hydroxide slurry, and then aging is carried out for at least 24 hours;
the crystal form control agent contains hydroxyl, aldehyde or carbonyl. Mainly utilizes the electrostatic adsorption effect of oxygen in oxygen-containing functional groups on calcium ions, taking hydroxyl as an example, the outermost electron orbit of oxygen is 2s2p4Oxygen has stronger electronegativity than hydrogen, so that 2 electrons are attracted to fill the outermost orbit of the oxygen to form an 8-electron stable structure; the outermost electron orbital of calcium is 4s2After losing two electrons, calcium ions are formed and empty orbitals appear. The oxygen on the hydroxyl provides two electrons to occupy the vacant orbit to form a coordination bond, so that the oxygen is electrostatically adsorbed with calcium ions. The growth direction of the calcium ions is controlled by the adsorbed calcium ions due to the steric hindrance effect, so that the aim of controlling the appearance of the calcium carbonate is fulfilled. The crystal form control agent can adopt xylitol and other sugar substitutes, even if the crystal form control agent in the final product has residues, the crystal form control agent is also friendly to human bodies and can be used in the fields of food, medicines and the like.
The mass fraction of the crystal form control agent in the total mixed system is not less than 0.2%.
The ratio of the ventilation volume per minute (milliliters per minute) of the carbon dioxide to the volume of the calcium oxide substance is 1: 40 to 50.
The temperature of the water bath reaction is kept at 0-25 ℃.
The method accurately controls the carbon dioxide aeration process and the treatment process of the product after the aeration is stopped, fully utilizes the carbonization, firstly leads the calcium carbonate to grow into chain calcium carbonate along a certain direction under the limit of a crystal form control agent, then leads excessive carbon dioxide to carry out further reaction, leads the long-chain calcium carbonate to be gradually broken and decomposed into granular nano calcium carbonate, ensures that all chain forms are completely broken to form granules by accurately controlling the pH value of the solution, and filters the reaction liquid in time to obtain the nano calcium carbonate with uniform granules and good dispersibility, wherein the grain diameter of the nano calcium carbonate is 40-60 nm.
Compared with the prior art, the invention has the following beneficial effects:
1) the crystal form control agent can adopt substances containing hydroxyl, aldehyde or carbonyl, particularly sugar substitutes such as xylitol and the like, and other substances which are not easy to remove or toxic and harmful to the environment are not required to be added as the crystal form control agent to control the growth of the calcium carbonate. The nano calcium carbonate product prepared by the invention has no negative effect even if the crystal form control agent remains, and can be used as an additive for food, medicine and the like which needs to ensure the safety of human bodies.
2) A crystal form control agent is added into the calcium hydroxide slurry, and the crystal form control agent can attract calcium ions in a form of coordinate bonds (wherein oxygen in an oxygen-containing functional group provides lone-pair electrons, and the calcium ions provide empty orbitals). Then, after carbon dioxide is introduced, hydroxyl ions react with the carbon dioxide to produce carbonate ions, and the carbonate ions and calcium ions are combined in an ionic bond form to produce calcium carbonate. Both the calcium ions adsorbed by the crystal form control agent and the free calcium ions react with the carbonate ions to generate calcium carbonate ion clusters. Free calcium carbonate ion clusters are also connected under the electrostatic attraction effect of calcium ions adsorbed by the crystal form control agent to form a structure which is connected by taking the crystal form control agent as a center and is diffused outwards. As the reaction progresses, calcium ions and carbonate ions between structures grow and are connected together gradually, and simultaneously, due to the orientation effect of the lower-energy crystalline phase of the calcium carbonate, the calcium carbonate grows to be chain-shaped along a certain direction, and the chain links are positions occupied by the crystal form control agent. Then dehydrating and crystallizing, the crystal lattice is ordered, calcium carbonate crystals are formed, and the crystal lattice formed by the surrounding calcium carbonate at the chain link is disordered due to the existence of the crystal form control agent, so that the energy is higher. After the hydroxyl ions are consumed by the subsequently introduced carbon dioxide, the carbon dioxide starts to further react with the calcium carbonate to generate calcium bicarbonate to be dissolved, so that the chain links are broken, the nano calcium carbonate with single particles is finally obtained, the introduced carbon dioxide also reacts with the calcium carbonate except the chain links, and the particles of the calcium carbonate are more uniform and fine through the erosion carving effect.
3) In the traditional preparation method, the pH value of less than or equal to 7 (or 6.8) after uniform stirring is taken as a reaction end point index, namely, the calcium hydroxide is completely reacted, so that calcium carbonate is generated by the complete reaction of the calcium hydroxide. Through a great deal of research, the inventor finds that a carbonization means is further adopted on the basis of the method to ensure that sufficient carbon dioxide is introduced, calcium carbonate is enabled to generate calcium bicarbonate, all chain shapes are broken to generate granular shapes, and the method can effectively obtain nano calcium carbonate with uniform particles even if the pH value of a solution system reaches 6 or below.
4) After the carbonization and aeration are finished, if the carbonization and aeration are not carried out in time, carbon dioxide gas can gradually escape after long-time aging, calcium bicarbonate can be decomposed again to generate calcium carbonate, the regenerated calcium carbonate is adsorbed due to the crosslinking effect of the crystal form control agent in the calcium carbonate, and a plurality of chain-shaped calcium carbonate can be generated again, so that the carbonization significance is proved from the side.
Drawings
FIG. 1 is a topographical view of a product produced in example 1 of the present invention;
FIG. 2 is a graph showing the morphology of the product obtained in example 2 of the present invention, wherein A-F are the aeration time from the start of the reaction to the calcium hydroxide slurry (A) 15min (B), the aeration time to the calcium hydroxide slurry (A) 30min (C), the aeration time to the calcium hydroxide slurry (A) 45min (D), the aeration time to the calcium hydroxide slurry (E) 60min (E), and the aeration time to the calcium hydroxide slurry (E) 75min, respectively, and (F) aging is carried out for 1h after the aeration is stopped.
Detailed Description
The invention will now be further described with reference to specific examples and figures.
Example 1
The method comprises the following steps: and (3) calcining the crushed, ground and screened calcium carbonate raw material in a muffle furnace at 1000 ℃.
Step two: dissolving 5.6g of calcined calcium oxide with 200ml of deionized water, pouring into a three-neck flask, digesting in a water bath at 70 ℃, vigorously stirring for 3 hours at 1000rpm by using a magnetic stirrer, and aging for 24 hours after digestion is completed.
Step three: the flask was placed in a water bath at 25 ℃ and stirred vigorously with a magnetic stirrer at 1000 rpm.
Step four: the conduit with porous quartz stone connected to the head is inserted below the liquid level, and carbon dioxide is introduced as close to the bottom as possible at a rate of 50 ml/min.
Step five: ventilating for 45min until the pH of the solution is 7, continuously ventilating for 30min, ventilating for 75min until the pH of the solution is 6.78, stopping ventilating, filtering, washing, and drying to obtain calcium carbonate as shown in figure 1. The final product has no crystal form control agent added, so that the appearance is not ideal due to free growth, the agglomeration phenomenon is serious, and the micron scale is achieved.
Example 2
The method comprises the following steps: and (3) calcining the crushed, ground and screened calcium carbonate raw material in a muffle furnace at 1000 ℃.
Step two: dissolving 5.6g of calcined calcium oxide with 200ml of deionized water, pouring into a three-neck flask, digesting in a water bath at 70 ℃, vigorously stirring for 3 hours at 1000rpm by using a magnetic stirrer, and aging for 24 hours after digestion is completed.
Step three: 0.304g of xylitol was added to a three-necked flask, which was placed in a water bath at 25 ℃ and vigorously stirred at 1000rpm using a magnetic stirrer.
Step four: the conduit with porous quartz stone connected to the head is inserted below the liquid level at the right side, and carbon dioxide is introduced as close to the bottom as possible at a rate of 50 ml/min. And taking a sample every 15min for appearance observation.
Step five: and (3) after the pH value of the solution is 7, continuing ventilating for 30min, stopping ventilating when the pH value of the solution is 6, filtering the product by suction, washing and drying to obtain the nano calcium carbonate, wherein the picture is 2. In the figure, (A) is from the reaction start to the slurry in 15min, the presence of more long chain nanometer calcium carbonate, reaction is insufficient, the pH is 13.08, calcium hydroxide is not completely consumed. (B) The slurry was aerated for 30min from the start of the reaction and the pH was 12.67. (C) The slurry is aerated for 45min from the beginning of the reaction, the pH is 6.90, the consumption of the calcium hydroxide is finished, the long-chain calcium carbonate is obviously reduced, and the particle proportion is improved. (D) To aerate the slurry for 60min from the start of the reaction, at a pH of 6.23, this time for 15min after over aeration, calcium carbonate was consumed to form calcium bicarbonate. (E) The slurry was aerated for 75min from the start of the reaction at pH 6.02, and at this time, calcium carbonate was consumed to produce calcium bicarbonate by aeration for 30min in excess, thereby promoting the formation of particles by breaking long chains. (F) In order to stop ventilation, the appearance is aged for 1h, and the proportion of the long chain calcium carbonate is increased again, because carbon dioxide in the solution escapes at the moment, so that the calcium bicarbonate is decomposed into calcium carbonate, and the dispersed particles are adhered into a chain shape.
Claims (8)
1. A process for preparing nano calcium carbonate includes such steps as calcining calcium carbonate ore as raw material, decomposing to obtain calcium oxide, digesting, ageing, adding crystal-type control agent, introducing carbon dioxide gas for water bath reaction, monitoring pH value of solution, continuously introducing carbon dioxide gas for carbonizing until pH value is 6 or less, stopping introducing gas, filtering, washing and drying.
2. The method for preparing nano calcium carbonate according to claim 1, wherein calcium carbonate ore mined from a mine site is subjected to preliminary crushing and screening, calcined and decomposed into calcium oxide, water is added to make the mass fraction of the calcium oxide be 3-5%, the calcium oxide is heated in a water bath at 70-80 ℃ and fully digested under stirring at 900-1000 rpm to obtain calcium hydroxide slurry, and then aging is performed for at least 24 hours.
3. The method for preparing nano calcium carbonate according to claim 1, wherein the crystal form control agent contains hydroxyl, aldehyde or carbonyl.
4. The method for preparing nano calcium carbonate according to claim 1, wherein the mass fraction of the crystal form control agent in the total mixed system is not less than 0.2%.
5. The method for preparing nano calcium carbonate according to claim 1, wherein the ratio of the aeration rate of carbon dioxide per minute to the amount of the calcium oxide substance is 1: 40 to 50.
6. The method for preparing nano calcium carbonate according to claim 1, wherein the temperature of the water bath reaction is kept between 0 and 25 ℃.
7. The method for preparing nano calcium carbonate according to claim 1, wherein the particle size of the prepared nano calcium carbonate is 40-60 nm.
8. The method for preparing nano calcium carbonate according to claim 1, wherein the timely filtration is to filter the raw reaction solution within 30min after the ventilation is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111544971.9A CN114212814B (en) | 2021-12-16 | 2021-12-16 | Preparation method of nano calcium carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111544971.9A CN114212814B (en) | 2021-12-16 | 2021-12-16 | Preparation method of nano calcium carbonate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114212814A true CN114212814A (en) | 2022-03-22 |
| CN114212814B CN114212814B (en) | 2023-08-01 |
Family
ID=80703110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111544971.9A Active CN114212814B (en) | 2021-12-16 | 2021-12-16 | Preparation method of nano calcium carbonate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114212814B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115057463A (en) * | 2022-06-29 | 2022-09-16 | 广西华纳新材料股份有限公司 | Micron-sized polyhedral calcium carbonate and preparation method thereof |
| CN116239903A (en) * | 2023-03-06 | 2023-06-09 | 湖北工业大学 | Preparation method of carbide slag-based carbonized inorganic refrigeration coating |
| CN116375071A (en) * | 2023-03-30 | 2023-07-04 | 苏州盛耀塑胶新材料有限公司 | Production process of superfine calcium carbonate |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050026158A (en) * | 2003-09-09 | 2005-03-15 | 김미현 | The process of manufacturing nano technology used high density antibiotic stone |
| BR0305049A (en) * | 2003-08-05 | 2005-05-17 | Carbomil S A Mineracao E Ind | Process for producing precipitated calcium carbonate |
| WO2007078017A1 (en) * | 2005-12-31 | 2007-07-12 | Korea Institute Of Geoscience And Mineral Resources | Novel manufacturing method of aragonite calcium carbonate |
| CN102491397A (en) * | 2011-12-09 | 2012-06-13 | 广东嘉维化工实业有限公司 | Preparation method of nano-calcium carbonate SCC-2 special for silicone sealant |
| WO2016185397A1 (en) * | 2015-05-21 | 2016-11-24 | Stora Enso Oyj | Production of nanosized precipitated calcium carbonate and use in improving dewatering of fiber webs |
| CN107724171A (en) * | 2017-09-30 | 2018-02-23 | 广西华洋矿源材料有限公司 | A kind of Nano calcium carbonate dedicated preparation method of papermaking |
| CN109879303A (en) * | 2019-03-29 | 2019-06-14 | 桂林理工大学 | A kind of preparation method of the nanometer calcium carbonate of the dispersion of stable suspersion in aqueous solution |
| CN110484022A (en) * | 2019-09-09 | 2019-11-22 | 青州宇信钙业股份有限公司 | A kind of production technology of the nanometer calcium carbonate of transparent membrane |
| CN111268712A (en) * | 2018-12-04 | 2020-06-12 | 天津大学 | Method for preparing nano calcium carbonate by using crystal form control agent for regulation and control |
| CN111960455A (en) * | 2020-09-14 | 2020-11-20 | 荆门市东宝区凯龙矿业股份有限公司 | Preparation method and detection method of high-viscosity high-yield-value nano calcium carbonate |
| CN113247936A (en) * | 2021-06-25 | 2021-08-13 | 安徽前江超细粉末科技有限公司 | Method for reducing energy consumption in production of nano calcium carbonate |
| CN113443645A (en) * | 2021-07-19 | 2021-09-28 | 合肥工业大学 | Preparation and modification process of nano calcium carbonate |
-
2021
- 2021-12-16 CN CN202111544971.9A patent/CN114212814B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR0305049A (en) * | 2003-08-05 | 2005-05-17 | Carbomil S A Mineracao E Ind | Process for producing precipitated calcium carbonate |
| KR20050026158A (en) * | 2003-09-09 | 2005-03-15 | 김미현 | The process of manufacturing nano technology used high density antibiotic stone |
| WO2007078017A1 (en) * | 2005-12-31 | 2007-07-12 | Korea Institute Of Geoscience And Mineral Resources | Novel manufacturing method of aragonite calcium carbonate |
| CN102491397A (en) * | 2011-12-09 | 2012-06-13 | 广东嘉维化工实业有限公司 | Preparation method of nano-calcium carbonate SCC-2 special for silicone sealant |
| WO2016185397A1 (en) * | 2015-05-21 | 2016-11-24 | Stora Enso Oyj | Production of nanosized precipitated calcium carbonate and use in improving dewatering of fiber webs |
| CN107724171A (en) * | 2017-09-30 | 2018-02-23 | 广西华洋矿源材料有限公司 | A kind of Nano calcium carbonate dedicated preparation method of papermaking |
| CN111268712A (en) * | 2018-12-04 | 2020-06-12 | 天津大学 | Method for preparing nano calcium carbonate by using crystal form control agent for regulation and control |
| CN109879303A (en) * | 2019-03-29 | 2019-06-14 | 桂林理工大学 | A kind of preparation method of the nanometer calcium carbonate of the dispersion of stable suspersion in aqueous solution |
| CN110484022A (en) * | 2019-09-09 | 2019-11-22 | 青州宇信钙业股份有限公司 | A kind of production technology of the nanometer calcium carbonate of transparent membrane |
| CN111960455A (en) * | 2020-09-14 | 2020-11-20 | 荆门市东宝区凯龙矿业股份有限公司 | Preparation method and detection method of high-viscosity high-yield-value nano calcium carbonate |
| CN113247936A (en) * | 2021-06-25 | 2021-08-13 | 安徽前江超细粉末科技有限公司 | Method for reducing energy consumption in production of nano calcium carbonate |
| CN113443645A (en) * | 2021-07-19 | 2021-09-28 | 合肥工业大学 | Preparation and modification process of nano calcium carbonate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115057463A (en) * | 2022-06-29 | 2022-09-16 | 广西华纳新材料股份有限公司 | Micron-sized polyhedral calcium carbonate and preparation method thereof |
| CN115057463B (en) * | 2022-06-29 | 2023-12-29 | 青川华纳新材料有限公司 | Micron-sized polyhedral calcium carbonate and preparation method thereof |
| CN116239903A (en) * | 2023-03-06 | 2023-06-09 | 湖北工业大学 | Preparation method of carbide slag-based carbonized inorganic refrigeration coating |
| CN116375071A (en) * | 2023-03-30 | 2023-07-04 | 苏州盛耀塑胶新材料有限公司 | Production process of superfine calcium carbonate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114212814B (en) | 2023-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114212814B (en) | Preparation method of nano calcium carbonate | |
| CN107555405B (en) | Preparation method of calcium phosphate nano powder with controllable length-diameter ratio and calcium-phosphorus ratio | |
| TWI483899B (en) | Magnesium oxide powder having good dispersibility and method for producing same | |
| EA001032B1 (en) | Spherical hydroxyapatite particles and process for the production thereof | |
| Geng et al. | Sonochemical synthesis of PbWO4 crystals with dendritic, flowery and star-like structures | |
| CN1217856C (en) | Nanometer hydroxyapatite powder preparation method | |
| CN109650430A (en) | A kind of method of high content of magnesium lime stone preparation nanometer calcium carbonate | |
| JP2001247310A (en) | Silica-calcium carbonate composite particle and method for producing the composite particle | |
| CN107954623B (en) | Preparation method for in-situ growth of nano particles on surface of solid waste | |
| CN101544412A (en) | Aquaculture water purifying agent and preparation method thereof | |
| CN108083314A (en) | A kind of preparation method of rice-shaped precipitated calcium carbonate | |
| JP3058255B2 (en) | Method for producing precipitated calcium carbonate | |
| CN108658047B (en) | Method for preparing high-content nano magnesium peroxide by one-pot precipitation method and product thereof | |
| CN110127741A (en) | A kind of nm-class active calcium carbonate preparation method applied to pvc plastisol | |
| JP2010037188A (en) | Method for preparing decolored aqueous sodium aluminate solution | |
| CN109692648A (en) | The adsorbent and preparation method thereof of sulfate ion in efficient absorption water | |
| CN107792872A (en) | A kind of preparation technology of spindle nano-calcium carbonate | |
| KR100929402B1 (en) | Antimicrobial Porous Beads and Manufacturing Method Thereof | |
| CN112023875A (en) | Preparation method of Hg (II) ion high-efficiency adsorbent | |
| CN1680492A (en) | Composite liquid additive of nano photocatalyst/Tuomalin and its preparation | |
| JP4441252B2 (en) | Calcium carbonate having an uneven surface and method for producing the same | |
| CN1415537A (en) | Adulterated hydroxyapatite and its production method | |
| JPH1036106A (en) | Porous bulk apatite carbonate and its production | |
| CN110104666B (en) | Method for preparing anhydrous magnesium carbonate based on hydrothermal carbonization reaction | |
| CN114314629B (en) | Preparation method of nano calcium carbonate based on surface potential control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Shang Dengkui Inventor after: Zhou Nifan Inventor after: Dai Zhengguan Inventor after: Song Nengyu Inventor after: Du Piyi Inventor after: Wang Zongrong Inventor before: Shang Dengkui Inventor before: Zhou Nifan Inventor before: Dai Zhengguan Inventor before: Song Nengyu Inventor before: Du Piyi Inventor before: Wang Zongrong |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |