CN114560488A - Sucrose assisted CO2Method for preparing calcium carbonate by mineralization - Google Patents
Sucrose assisted CO2Method for preparing calcium carbonate by mineralization Download PDFInfo
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- CN114560488A CN114560488A CN202210380633.4A CN202210380633A CN114560488A CN 114560488 A CN114560488 A CN 114560488A CN 202210380633 A CN202210380633 A CN 202210380633A CN 114560488 A CN114560488 A CN 114560488A
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- calcium carbonate
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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 105
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 49
- 229930006000 Sucrose Natural products 0.000 title claims abstract description 44
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 title claims abstract description 41
- 239000005720 sucrose Substances 0.000 title claims abstract description 40
- 230000033558 biomineral tissue development Effects 0.000 title claims description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000002893 slag Substances 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000006477 desulfuration reaction Methods 0.000 claims description 11
- 230000023556 desulfurization Effects 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 239000012295 chemical reaction liquid Substances 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000009628 steelmaking Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 229960004793 sucrose Drugs 0.000 abstract description 34
- 239000011575 calcium Substances 0.000 abstract description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052791 calcium Inorganic materials 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000001089 mineralizing effect Effects 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 30
- 229910002092 carbon dioxide Inorganic materials 0.000 description 13
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 8
- 239000000920 calcium hydroxide Substances 0.000 description 8
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 5
- 229910001424 calcium ion Inorganic materials 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 238000003760 magnetic stirring Methods 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- 125000000185 sucrose group Chemical group 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N hydrochloric acid Substances Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000009919 sequestration Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
-
- 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
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- 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
-
- 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
-
- 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
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses sucrose-assisted CO2The mineralizing process for preparing calcium carbonate includes mixing desulfurized dregs with cane sugar solution, reaction, introducing CO into the clear liquid2Gas, generating calcium carbonate. The method not only realizes the effective utilization of the calcium-containing components in the solid waste desulphurization slag, but also produces the calcium carbonate product, and has certain economic value and environmental protection significance.
Description
Technical Field
The invention relates to the technical field of carbon capture, utilization and sequestration (CCUS), in particular to cane sugar assisted CO2A method for preparing calcium carbonate by mineralization.
Background
The phenomenon of global warming caused by excessive emission of greenhouse gases is becoming more serious, which not only causes a series of ecological environmental problems, but also causes huge economic losses. CO in all greenhouse gases2The content is highest, accounting for about 82% of the total emission, and the service life is longer. At present, due to CO2The problems of greenhouse effect and the like caused by excessive emission have been achievedOf continuing concern, CO2Emission reduction becomes a worldwide problem to be solved. Carbon dioxide Post Combustion Capture (PCC) based on chemical absorption has proven to be a very effective abatement strategy, enabling significant reductions in carbon dioxide emissions from coal-fired power plants. The method for absorbing carbon dioxide by using alkaline compounds in the desulfurization slag has the characteristics of environmental protection, safety and low cost, but because the desulfurization slag has complex components, the components such as calcium hydroxide and the like in the desulfurization slag are wrapped in desulfurization slag particles and are difficult to fully dissolve out, and the absorption of CO by using the desulfurization slag is prevented2The study of (1).
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide cane sugar auxiliary CO2A method for preparing calcium carbonate by mineralization.
The purpose of the invention is realized by the following technical scheme: sucrose assisted CO2A method for preparing calcium carbonate by mineralization, comprising:
carrying out saccharification reaction, namely mixing the desulphurization residue with a sucrose solution for reaction;
mineralization reaction, introducing CO into the clear liquid obtained by the reaction2Gas, generating calcium carbonate.
Preferably, in the mineralization reaction, CO is introduced into the clear liquid obtained by the reaction2And after the gas is generated, filtering, washing and drying the reaction liquid containing the calcium carbonate in sequence to obtain the calcium carbonate.
Preferably, the pH in the saccharification reaction step is 11-14.
Preferably, the mass fraction of the sucrose solution in the saccharification reaction step is 5-50%.
Preferably, the pH at the end of the mineralization reaction is between 9 and 10.
Preferably, the saccharification reaction temperature is 4-60 ℃ and the reaction time is 0.5-2 h.
Preferably, the grain size of the desulfurization slag is less than 50 μm.
The desulfurization slag is generally prepared from calcium sulfite, calcium sulfate, calcium carbonate, calcium hydroxide, calcium oxide, calcium chloride, fly ash and the like, wherein the fly ash mainly contains silicon dioxide (SiO)2) Oxygen, oxygenAluminium (Al)2O3) And iron oxide (Fe)2O3) And the like, which has little or no hydraulic gelation performance, but can react with calcium hydroxide or other alkaline earth metal hydroxides to generate a compound with the hydraulic gelation performance when powdery and water exist, so that the compound becomes a material with increased strength and durability, and the desulphurization slag contains more calcium-based compounds, so that the calcium-based compounds can perform hydration reaction with active ingredients such as silicon dioxide, aluminum oxide, ferric oxide and the like to form crystals and provide strength, and the desulphurization slag has a tendency of self-hardening. The steelmaking blast furnace slag also contains components such as calcium oxide, calcium hydroxide, aluminum oxide and the like, and the property is similar to that of the desulfurized slag.
The sucrose solution in the present invention may be used with CaO or Ca (OH)2Fixing and trapping CO from alkaline waste residue of component2At the same time realize CO2The mineralizing and dissolving assistant solvent regeneration and calcium carbonate separation principle is as follows:
and (3) saccharification process: nCa (OH)2 + C12H22O11 = CanC12H22-2nO11 + 2nH2O （1）
The mineralization regeneration process: canC12H22-2nO11 + nCO2 + nH2O = C12H22O11 + nCaCO3 （2）
The general reaction formula is as follows: CO 23 2- +Ca2+ ⇌ CaCO3 （3）
Reaction (1) is a saccharification mechanism, and sucrose neutralizes calcium ions in an alkaline aqueous solution to generate calcium sucrose. Reaction (2) sucrose calcium mineralization regeneration mechanism, solution absorption of CO2Later, calcium carbonate and cane sugar are generated; reaction (3) is the overall reaction.
The invention has the following advantages:
the desulfurization residue has complicated components, wherein alkaline components such as calcium oxide and calcium hydroxide are partially wrapped in insoluble components such as calcium carbonate and are hidden in the skeleton obtained by self-hardening of the desulfurization residue, so thatThe method adopts the sucrose solution, can not be influenced by the self-hardening tendency of raw materials, the calcium ions in the sucrose solution almost reach the complete extraction degree, and the whole process does not need heating, can obtain purer calcium carbonate and the sucrose solution which can be used for circulation, wherein CO is used for preparing the calcium carbonate, and the calcium carbonate is used for the circulation of the sucrose solution, wherein CO is used for preparing the calcium carbonate, and the calcium carbonate is used for dissolving the alkaline components in the sucrose solution, and the alkaline components are dissolved in the sodium hydroxide at the temperature of 80-100 ℃ or the calcium oxide, the calcium hydroxide and other soluble calcium ion components in the sucrose solution are difficult to dissolve by adopting a strong acid such as hydrochloric acid2Preservation as calcium carbonate solids does not risk leakage.
Calcium carbonate particles are continuously separated out in the mineralization process, and agglomeration may occur among the particles to cause the larger particle size of the calcium carbonate product, but the particle size of the obtained product is below 2 microns on the premise that no surfactant is added.
The method can further utilize the calcium hydroxide in the desulfurization slag to obtain a purer aragonite calcium carbonate product which can be used in the industries of rubber, paint, paper making, plastics and the like, thereby realizing the comprehensive utilization of solid wastes.
In the prior art, the crystal form control agent is required to be additionally added into the reaction liquid for obtaining the aragonite calcium carbonate product, the aragonite calcium carbonate can be obtained without additionally adding the crystal form control agent in the application, and the purity of the aragonite calcium carbonate is more than 98 wt%.
The method realizes the utilization of calcium hydroxide and CO in the alkaline waste residue2The mineralization and the obtaining of useful products are carried out at normal temperature and normal pressure, the process flow is shortened, and the process is simple and safe.
The method of the invention carries out the mineralization process of calcium sucrose under the controllable pH value, thereby leading the sucrose solution to be completely carbonized, completely separating calcium carbonate, preventing the decomposition of the sucrose and being more beneficial to the next circulation.
Drawings
FIG. 1 shows sucrose assisted CO of the present invention2A process flow chart of a method for preparing calcium carbonate by mineralization.
FIG. 2 is a graph showing the relationship between the extraction rate of calcium ions from a sucrose solution and the number of cycles.
Fig. 3 is a thermogravimetric plot of the resulting calcium carbonate.
Fig. 4 is an SEM image of the generated calcium carbonate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
The application provides sucrose-assisted CO2A method for preparing calcium carbonate by mineralization, comprising:
carrying out saccharification reaction, namely mixing the desulphurization residue with a sucrose solution for reaction, wherein the mass fraction of the sucrose solution is 5-50%, the granularity of the desulphurization residue is less than 50 mu m, the reaction pH is 11-14, the reaction temperature is 4-60 ℃, and the reaction time is 0.5-2 h;
mineralization reaction, introducing CO into the clear liquid obtained by the reaction2And (3) gas is carried out until the pH value is 9-10, and the reaction liquid containing the calcium carbonate is sequentially filtered, washed and dried.
Example 1:
preparing 430ml of 11% sucrose solution in a 500ml beaker, adding 40g of desulfurized slag, performing magnetic stirring reaction at room temperature for 2 hours, filtering, taking clear liquid in a 750ml four-mouth culture flask, keeping the temperature of the solution at 25 ℃, and introducing 800ml/mCO of in2：N2And (3) mixed gas of =0.12, and the reaction is stopped when the pH value of the solution is reduced to 9-10. Filtering to obtain solid phase calcium carbonate and liquid phase sucrose solution, recycling the sucrose solution obtained by mineralization reaction, obtaining the relation between extraction rate and cycle frequency as shown in figure 2, almost reaching the complete extraction degree, obtaining the thermogravimetric curve and SEM (scanning electron microscope) graph of calcium carbonate products as shown in figures 3 and 4, wherein the obtained products are aragonite calcium carbonate with particle size below 2 microns.
Example 2:
preparing 430ml of 5% sucrose solution in 500ml beaker, adding 40g of desulfurized slag, reacting for 0.5h under magnetic stirring at room temperature, filtering, placing the clear solution in 750ml four-mouth method culture flask, keeping the solution at 4 ℃ and introducing 800ml/min of CO2And gas, and stopping the reaction when the pH value of the solution is reduced to 9-10. The solid phase obtained by filtering is calcium carbonate, and the liquid phase is sucrose solution.
Example 3:
preparing 430ml of 50% sucrose solution in a 500ml beaker, adding 40g of desulfurized slag, performing magnetic stirring reaction at room temperature for 2h, filtering, taking clear liquid in a 750ml four-mouth culture flask, keeping the temperature of the solution at 60 ℃, and introducing 800ml/min CO2：N2The reaction is stopped when the pH value of the solution is reduced to 9-10 by using mixed gas of = 0.01. The solid phase obtained by filtering is calcium carbonate, and the liquid phase is sucrose solution.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (7)
1. Sucrose assisted CO2The method for preparing calcium carbonate by mineralization is characterized by comprising the following steps:
carrying out saccharification reaction, namely mixing the desulphurization slag or the steelmaking blast furnace slag with a sucrose solution for reaction;
mineralization reaction, reaction ofIntroducing CO into the obtained clear liquid2Gas, generating calcium carbonate.
2. The sucrose-assisted CO of claim 12The method for preparing calcium carbonate by mineralization is characterized by comprising the following steps: the particle size of the desulfurization slag is less than 50 μm.
3. The sucrose-assisted CO of claim 12The method for preparing calcium carbonate by mineralization is characterized by comprising the following steps: the pH value in the saccharification reaction step is 11-14.
4. The sucrose-assisted CO of claim 12The method for preparing calcium carbonate by mineralization is characterized by comprising the following steps: the mass fraction of the sucrose solution in the saccharification reaction step is 5-50%.
5. The sucrose-assisted CO of claim 12The method for preparing calcium carbonate by mineralization is characterized by comprising the following steps: the saccharification reaction temperature is 4-60 ℃, and the reaction time is 0.5-2 h.
6. The sucrose-assisted CO of claim 12The method for preparing calcium carbonate by mineralization is characterized by comprising the following steps: in the mineralization reaction, CO is introduced into clear liquid obtained by the reaction2And after the gas is generated, filtering, washing and drying the reaction liquid containing the calcium carbonate in sequence to obtain the calcium carbonate.
7. The sucrose-assisted CO of claim 12The method for preparing calcium carbonate by mineralization is characterized by comprising the following steps: the pH value at the end of the mineralization reaction is 9-10.
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| CN103172100A (en) * | 2011-12-23 | 2013-06-26 | 杨晓林 | Method for preparing calcium carbonate in different grain sizes |
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2022
- 2022-04-12 CN CN202210380633.4A patent/CN114560488A/en active Pending
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| CN103172100A (en) * | 2011-12-23 | 2013-06-26 | 杨晓林 | Method for preparing calcium carbonate in different grain sizes |
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