CN103950964A - Method for preparing nano calcium carbonate particles with different aspect ratios by means of adjusting number of carbonization times - Google Patents
Method for preparing nano calcium carbonate particles with different aspect ratios by means of adjusting number of carbonization times Download PDFInfo
- Publication number
- CN103950964A CN103950964A CN201410177942.7A CN201410177942A CN103950964A CN 103950964 A CN103950964 A CN 103950964A CN 201410177942 A CN201410177942 A CN 201410177942A CN 103950964 A CN103950964 A CN 103950964A
- Authority
- CN
- China
- Prior art keywords
- calcium carbonate
- carbonate particles
- carbonization
- nano
- regulating
- 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
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 57
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 41
- 239000002245 particle Substances 0.000 title claims abstract description 35
- 238000003763 carbonization Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000008367 deionised water Substances 0.000 claims abstract description 21
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 21
- 230000032683 aging Effects 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000005406 washing Methods 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000005119 centrifugation Methods 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000011575 calcium Substances 0.000 claims description 13
- 239000006228 supernatant Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims description 6
- 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 claims description 5
- 229930006000 Sucrose Natural products 0.000 claims description 5
- 239000005720 sucrose Substances 0.000 claims description 5
- 230000029087 digestion Effects 0.000 claims description 3
- 239000013078 crystal Substances 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract 2
- 239000000920 calcium hydroxide Substances 0.000 abstract 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 abstract 2
- 235000011116 calcium hydroxide Nutrition 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000004090 dissolution Methods 0.000 abstract 1
- 238000007873 sieving Methods 0.000 abstract 1
- 238000003483 aging Methods 0.000 description 12
- 238000013019 agitation Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- 229910021532 Calcite Inorganic materials 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 150000005323 carbonate salts Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention relates to a method for preparing nano calcium carbonate particles with different aspect ratios by means of adjusting the number of carbonization times. The method comprises the following steps: adding deionized water at the temperature of 80-85 DEG C into CaO; stirring for reacting for 20-30 minutes; ageing at room temperature; sieving; adding deionized water to obtain a Ca(OH)2 solution; under the condition of a water bath, adding a crystal form control agent into the Ca(OH)2 solution; stirring for dissolution; introducing carbon dioxide gas for carbonization and stirring until a different reaction stage is reached; if carbonization needs to be performed for multiple times, continuously adding carbon dioxide gas after ageing, and stirring until the pH reaches 7; centrifugally washing; and drying, thereby obtaining the nano calcium carbonate particles with different aspect ratios. The method has the characteristics of being simple to operate, low in cost, excellent in repeatability, low in requirement on temperature and the like, the reaction conditions are easy to control and the product quality is good; the prepared nano calcium carbonate particles are uniform in particle size distribution and excellent in dispersibility, and has a good application prospect.
Description
Technical field
The invention belongs to the preparation method field of nano-calcium carbonate particles, particularly a kind of by regulating carbonization number of times to prepare Different Diameter to than the method for nano-calcium carbonate particles.
Background technology
Calcium carbonate is a kind of important chemical industry basic raw material and typical biomineral, has the features such as the simple and application performance of abundant raw material, production technique is good, is widely used in the industry such as rubber, plastics, ink, papermaking, medicine and food as filler.
Calcium carbonate has calcite, aragonite and three kinds of different crystal habits of vaterite, adheres to the orthogonal and isometric system of tripartite separately, and wherein calcite is the most stable, and aragonite and vaterite belong to non-steady crystalline state, and their energy reduces successively, and solubleness also reduces successively.
At present, about nanometer CaCO
3preparation method have a lot, calcium carbonate preparation method is divided into liquid phase reaction method and carborization.Liquid phase reaction method is prepared calcium carbonate by reaction between calcium salt and carbonate salt or two kinds of solution of supercarbonate, more regular and the more greatly micron order of particle size of the most of patterns of products obtained therefrom, because the reaction volume of its use is few and the unmanageable limitation of preparation process, application is difficult to be magnified.Carborization is the main method of current industrial production nano-calcium carbonate, and these method raw material sources are extensive, are mainly through selected Wingdale.Wingdale obtains CaO through calcining; Then CaO digestion passed into CO
2, adding chemical additives, carbonization is to terminal; Final product obtains nano-calcium carbonate calcium product through processes such as dehydration, dry, surface treatments.According to CO
2with Ca (OH)
2the difference of the suspension liquid way of contact, can be divided into carborization intermittently carborization, multilevel spray carbonization and high-gravity carbonation method.
Nano-calcium carbonate shows the physics unusual or unusual with ordinary calcium carbonate difference, chemical property at aspects such as magnetic, catalyzer, photo-thermal resistance and fusing points, and in the property of the application aspect such as increasing tougheness, reinforcement, the transparency, thixotropy, levelling property and disinfection, be volume effect, surface and interface effect, quantum size effect and the macro quanta tunnel effect because it has.And nano-calcium carbonate radially than difference, make particle diametric plane content difference, total diametric plane difference, causes above-mentioned character to change.So this is also that different field needs one of reason of different-shape.In production, main controlling factor has Ca (OH)
2emulsion concentration, CO
2flow, temperature of reaction, additive types etc.By controlling different conditions, the unit's of preparing particle diameter (or minor axis) is greater than the multiple nano-calcium carbonate calcium product of 10nm at present, and crystal shape has chain, needle-like, spherical, cube, sheet, spins taper etc.But, up to now, also do not seen about by regulating carbonization number of times to prepare Different Diameter to than nanometer CaCO
3the method of particle.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of by regulating the features such as carbonization number of times is prepared Different Diameter to than the method for nano-calcium carbonate particles, and the method is simple to operate, reproducible, and reaction conditions is easily controlled, and temperature requirement is low; The size distribution of the calcite type nano-calcium carbonate particles of preparing is even, and particle diameter is controlled, has a good application prospect.
Of the present invention a kind of by regulating carbonization number of times to prepare Different Diameter to than the method for nano-calcium carbonate particles, comprising:
(1) deionized water of 80-85 DEG C is added in CaO, stirring reaction 20-30min, room temperature ageing, sieves, and adds deionized water, obtains Ca (OH)
2solution;
(2), under water bath condition, chemical additives is added to above-mentioned Ca (OH)
2in solution, stirring and dissolving, passes into carbon dioxide and carries out carbonization, and stirs, and stops to the differential responses stage; Carbonization repeatedly time, continues logical carbon dioxide and stirs after ageing, to reaction soln pH be 7, wash centrifugally, dry, obtain Different Diameter to than nano-calcium carbonate particles.
In described step (1), the proportionlity of CaO and 80-85 DEG C of deionized water is 6.05g:30ml.
In described step (1), digestion time is 12-48h; Sieve order number is 200 orders.
Ca (OH) in described step (1)
2the mass percentage concentration of solution is 4-8%.
In described step (2), chemical additives is sucrose, and add-on is theoretical CaCO
31.5% of output.
In described step (2), carbon dioxide is 1.5L/min, and maintenance bath temperature is 18.0-25.0 DEG C.
In described step (2), the stirring and dissolving time is 5-10min.
In described step (2), carbonization number of times is 1 time, 2 times or 3 times.
Described step is carried out ageing according to carbonization number of times in (2), and Aging Temperature is 65-70 DEG C, and ageing total time is 10-16h.
In described step (2), washing centrifugal is that ethanol, deionized water alternately wash centrifugal, be specially: first use absolute ethanol washing, the centrifugal removal supernatant liquor of centrifugation 8-10min under 10000rpm, use again deionized water wash, under 10000rpm the centrifugal removal supernatant liquor of centrifugation 8-10min, finally use absolute ethanol washing, centrifugation 8-10min is centrifugal under 10000rpm.In described step (2), drying temperature is 80-85 DEG C.
beneficial effect
(1) the present invention have simple to operate, reproducible, the feature such as reaction conditions is easily controlled, and temperature requirement is low;
(2) size distribution of the calcite type nano-calcium carbonate particles that the present invention prepares is even, and particle diameter is controlled, has a good application prospect.
Brief description of the drawings
Fig. 1 is the TEM figure of the nano-calcium carbonate particles of embodiment 1 gained;
Fig. 2 is the TEM figure of the nano-calcium carbonate particles of embodiment 2 gained;
Fig. 3 is the TEM figure of the nano-calcium carbonate particles of embodiment 3 gained;
Fig. 4 is the XRD figure of the nano-calcium carbonate particles of embodiment 3 gained.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment 1
(1) take 6.05g CaO, add about 30ml85.0 DEG C deionized water, the about 30min of magnetic agitation.More than ageing 24h.
(2) add deionized water to 200ml, and by Ca (OH)
2solution is crossed 200 mesh sieve.
(3) water-bath magnetic agitation in room temperature water, adds sucrose 0.162g (theoretical calcium carbonate output 0.15%), after 10min, and logical CO
21.5L/min, in the time that pH decline is approximately 7, stopped reaction.
(4) reaction finishes, centrifuge washing.First use absolute ethanol washing, the centrifugal removal supernatant liquor of centrifugation 8min under 10000rpm, use again deionized water wash, the centrifugal removal supernatant liquor of centrifugation 8min under 10000rpm, so circulation 3 times, finally uses absolute ethanol washing, centrifugation 8min is centrifugal under 10000rpm.
(5) in 80.0 DEG C of drying in oven.
TEM by Fig. 1 schemes, and estimates being about as 54.07nm of product by figure, the wide 40.56nm that is about, and length-to-diameter ratio is about 1.333.
Embodiment 2
(1) take 6.05g CaO, add about 30ml85.0 DEG C deionized water, the about 30min of magnetic agitation.More than ageing 24h.
(2) add deionized water to 200ml, and by Ca (OH)
2solution is crossed 200 mesh sieve.
(3) water-bath magnetic agitation in room temperature water, adds sucrose 0.162g (theoretical calcium carbonate output 0.15%), after 10min, and logical CO
21.5L/min, in the time that pH drops to 9.5-10.5, stops and starting ageing 16h in 65 DEG C of water-bath.
(4) magnetic agitation, is down to room temperature.Continue logical CO
21.5L/min, in the time that pH is approximately 7, stopped reaction.
(5) reaction finishes, centrifuge washing.First use absolute ethanol washing, the centrifugal removal supernatant liquor of centrifugation 8min under 10000rpm, use again deionized water wash, the centrifugal removal supernatant liquor of centrifugation 8min under 10000rpm, so circulation 3 times, finally uses absolute ethanol washing, centrifugation 8min is centrifugal under 10000rpm.
(6) in 80.0 DEG C of drying in oven.
TEM by Fig. 2 schemes, and estimates being about as 131.7nm of product by figure, the wide 58.96nm that is about, and length-to-diameter ratio is about 2.233.
Embodiment 3
(1) take 6.05g CaO, add about 30ml85.0 DEG C deionized water, the about 30min of magnetic agitation.More than ageing 24h.(2) add deionized water to 200ml, and by Ca (OH)
2solution is crossed 200 mesh sieve.
(3) water-bath magnetic agitation in room temperature water, adds sucrose 0.162g (theoretical calcium carbonate output 0.15%).
(4) after 10min, logical CO
21.5L/min, stops after 8min.And 65.0 DEG C of water-bath ageings.
(5) after 6h, stop ageing, and be down to room temperature, continue logical CO
21.5L/min, stops after 15min.And 65.0 DEG C of water-bath ageings.
(6) after 10h, stop ageing, be cooled to room temperature, stir, continue logical CO
21.5L/min, in the time that pH is approximately 7, stopped reaction.
(7) reaction finishes, centrifuge washing.First use absolute ethanol washing, the centrifugal removal supernatant liquor of centrifugation 8min under 10000rpm, use again deionized water wash, the centrifugal removal supernatant liquor of centrifugation 8min under 10000rpm, so circulation 3 times, finally uses absolute ethanol washing, centrifugation 8min is centrifugal under 10000rpm.
(8) in 80.0 DEG C of drying in oven.
By the TEM figure of Fig. 3 and the XRD figure of Fig. 4, estimate being about as 174.16nm of product by figure, the wide 39.72nm that is about, length-to-diameter ratio is about 4.385, and is all the nano-calcium carbonate particles of calcite type.
Claims (10)
1. by regulating carbonization number of times to prepare Different Diameter to than a method for nano-calcium carbonate particles, comprising:
(1) deionized water of 80-85 DEG C is added in CaO, stirring reaction 20-30min, room temperature ageing, sieves, and adds deionized water, obtains Ca (OH)
2solution;
(2), under water bath condition, chemical additives is added to above-mentioned Ca (OH)
2in solution, stirring and dissolving, passes into carbon dioxide and carries out carbonization, and stirs, and stops to the differential responses stage; Carbonization repeatedly time, continues logical carbon dioxide and stirs after ageing, to reaction soln pH be 7, wash centrifugally, dry, obtain Different Diameter to than nano-calcium carbonate particles.
2. according to claim 1 a kind of by regulating carbonization number of times to prepare Different Diameter to than the method for nano-calcium carbonate particles, it is characterized in that: in described step (1), the proportionlity of CaO and 80-85 DEG C of deionized water is 6.05g:30ml.
3. according to claim 1 a kind of by regulating carbonization number of times to prepare Different Diameter to than the method for nano-calcium carbonate particles, it is characterized in that: in described step (1), digestion time is 12-48h; Sieve order number is 200 orders.
4. according to claim 1 a kind of by regulating carbonization number of times to prepare Different Diameter to than the method for nano-calcium carbonate particles, it is characterized in that: Ca (OH) in described step (1)
2the mass percentage concentration of solution is 4-8%.
5. according to claim 1 a kind of by regulating carbonization number of times to prepare Different Diameter to than the method for nano-calcium carbonate particles, it is characterized in that: in described step (2), chemical additives is sucrose, and add-on is theoretical CaCO
31.5% of output.
6. according to claim 1 a kind of by regulating carbonization number of times to prepare Different Diameter to than the method for nano-calcium carbonate particles, it is characterized in that: in described step (2), carbon dioxide is 1.5L/min, and bath temperature is 18.0-25.0 DEG C.
7. according to claim 1 a kind of by regulating carbonization number of times to prepare Different Diameter to than the method for nano-calcium carbonate particles, it is characterized in that: in described step (2), carbonization number of times is 1 time, 2 times or 3 times.
8. according to claim 1 a kind of by regulating carbonization number of times to prepare Different Diameter to than the method for nano-calcium carbonate particles, it is characterized in that: described step is carried out ageing according to carbonization number of times in (2), Aging Temperature is 65-70 DEG C, and ageing total time is 10-16h.
9. according to claim 1 a kind of by regulating carbonization number of times to prepare Different Diameter to than the method for nano-calcium carbonate particles, it is characterized in that: in described step (2), washing centrifugal is that ethanol, deionized water alternately wash centrifugal, be specially: first use absolute ethanol washing, the centrifugal removal supernatant liquor of centrifugation 8-10min under 10000rpm, use again deionized water wash, under 10000rpm the centrifugal removal supernatant liquor of centrifugation 8-10min, finally use absolute ethanol washing, centrifugation 8-10min is centrifugal under 10000rpm.
10. according to claim 1 a kind of by regulating carbonization number of times to prepare Different Diameter to than the method for nano-calcium carbonate particles, it is characterized in that: in described step (2), drying temperature is 80-85 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410177942.7A CN103950964B (en) | 2014-04-29 | 2014-04-29 | It is a kind of to prepare method of the different radial directions than nano-calcium carbonate particles by adjusting carbonization number |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410177942.7A CN103950964B (en) | 2014-04-29 | 2014-04-29 | It is a kind of to prepare method of the different radial directions than nano-calcium carbonate particles by adjusting carbonization number |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103950964A true CN103950964A (en) | 2014-07-30 |
| CN103950964B CN103950964B (en) | 2018-02-23 |
Family
ID=51328357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410177942.7A Expired - Fee Related CN103950964B (en) | 2014-04-29 | 2014-04-29 | It is a kind of to prepare method of the different radial directions than nano-calcium carbonate particles by adjusting carbonization number |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103950964B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417564A (en) * | 2015-09-14 | 2016-03-23 | 广西大学 | Preparation method for petal sheet-like calcium carbonate crystals |
| CN107416884A (en) * | 2017-09-30 | 2017-12-01 | 广西华洋矿源材料有限公司 | A kind of production method of high-quality superfine light calcium carbonate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583483A (en) * | 2012-02-22 | 2012-07-18 | 常州碳酸钙有限公司 | Preparation method of micrometer spindle composite nano-calcium carbonate |
| CN102674425A (en) * | 2012-05-19 | 2012-09-19 | 祁阳建明化工有限责任公司 | Production technique of nano calcium carbonate by normal temperature method |
| CN103663527A (en) * | 2012-09-25 | 2014-03-26 | 上海华明高技术（集团）有限公司 | Preparation method of cubic ultra-fine calcium carbonate particles |
-
2014
- 2014-04-29 CN CN201410177942.7A patent/CN103950964B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583483A (en) * | 2012-02-22 | 2012-07-18 | 常州碳酸钙有限公司 | Preparation method of micrometer spindle composite nano-calcium carbonate |
| CN102674425A (en) * | 2012-05-19 | 2012-09-19 | 祁阳建明化工有限责任公司 | Production technique of nano calcium carbonate by normal temperature method |
| CN103663527A (en) * | 2012-09-25 | 2014-03-26 | 上海华明高技术（集团）有限公司 | Preparation method of cubic ultra-fine calcium carbonate particles |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417564A (en) * | 2015-09-14 | 2016-03-23 | 广西大学 | Preparation method for petal sheet-like calcium carbonate crystals |
| CN107416884A (en) * | 2017-09-30 | 2017-12-01 | 广西华洋矿源材料有限公司 | A kind of production method of high-quality superfine light calcium carbonate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103950964B (en) | 2018-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103950965B (en) | A kind of method using kind of crystallization to prepare different size nano-calcium carbonate | |
| CN103663527B (en) | The preparation method of cubic ultra-fine calcium carbonate particle | |
| CN105836781B (en) | A kind of carbonization-activation integrated apparatus and method for producing nano-calcium carbonate | |
| US20090169456A1 (en) | Apparatus for Manufacturing Nanoporous Silica Method Thereof | |
| CN104911688B (en) | The preparation method of anhydrous calcium sulfate whisker | |
| CN104229901B (en) | A kind of preparation method of magnetic ferroferric oxide nano-particles | |
| CN104030335A (en) | Method for preparing Sm(OH)3/ZnO nano-composite by using homogeneous hydrothermal method | |
| CN106542557B (en) | A kind of preparation technology of nano-calcium carbonate | |
| CN106348332B (en) | A kind of method and device that vaterite is prepared using dynamic magnetic agitating paddle | |
| CN103738993A (en) | Carbonation reactor of energy-efficient nano calcium carbonate and preparation method of energy-efficient nano calcium carbonate | |
| CN102189267A (en) | Method for preparing highly-dispersed regular octahedral platinum nano particles | |
| CN108862355A (en) | A kind of method that microchannel method prepares barium sulfate particle | |
| CN106928753A (en) | A kind of preparation method for PVC automobile chassis stone-impact-proof paint modified calcium carbonates | |
| CN106167270B (en) | A kind of preparation method of mesoporous θ aluminum oxide ball type carrier | |
| CN103435097B (en) | Preparation method and application of nano zirconia | |
| CN103950964A (en) | Method for preparing nano calcium carbonate particles with different aspect ratios by means of adjusting number of carbonization times | |
| CN108483478A (en) | A method of preparing three kinds of crystal configuration calcium carbonate granules | |
| CN105600833A (en) | Spherical mesoporous iron oxide and preparation method thereof | |
| CN104609453B (en) | A kind of preparation method of cubic winnofil | |
| CN109292790A (en) | The preparation method of alkali formula antifungin nanometer rods | |
| CN103466643A (en) | Method for preparing white carbon black by circularly using mother liquor | |
| CN105399128A (en) | Micron spindle-fiber-like structure vaterite calcium carbonate preparation method | |
| CN102285676A (en) | Method for preparing nano calcium carbonate from epoxypropane saponification waste water by chlorhydrin method | |
| CN116002743B (en) | Hollow tubular nano barium sulfate and preparation method and application thereof | |
| CN107098374A (en) | Dispersed bulk morphologies carbonic acid cerium crystal and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180223 |