CN106587125A - Preparation method for light calcium carbonate - Google Patents
Preparation method for light calcium carbonate Download PDFInfo
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- CN106587125A CN106587125A CN201611077379.1A CN201611077379A CN106587125A CN 106587125 A CN106587125 A CN 106587125A CN 201611077379 A CN201611077379 A CN 201611077379A CN 106587125 A CN106587125 A CN 106587125A
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- Prior art keywords
- calcium carbonate
- gas
- light calcium
- droplets
- liquid
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- 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
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/30—Three-dimensional structures
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
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- 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
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
- C01P2004/32—Spheres
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- 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
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- 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)
Abstract
The invention discloses a preparation method for light calcium carbonate. In the method, a Ca(OH)2 turbid liquid and CO2 compressed gas respectively pass through two fluid atomizing spray nozzles, wherein the Ca(OH)2 turbid liquid is dispersed into micron-scale droplets by high-pressure CO2, and meanwhile, a carbonization reaction is carried out to generate the light calcium carbonate, which is rapidly dried by hot air flow to directly prepare light calcium carbonate powder. Compared with a conventional carbonization method, in the method, the Ca(OH)2 droplets, being a dispersion phase, and the CO2 gas, being a continuous phase, are contacted in forward direction, so that because the atomized Ca(OH)2 turbid liquid has small droplets, contact area of gas-liquid two-phase mass transfer is effectively increased. Meanwhile, gas-liquid mass transfer rate is increased since the Ca(OH)2 droplets have large speed difference from the CO2 gas, thereby completing the carbonization reaction in a short time. The sprayed droplets are rapidly dried by hot air flow after the carbonization reaction, thereby producing the light calcium carbonate powder.
Description
Technical field
The present invention relates to a kind of method for continuously preparing precipitated calcium carbonate.
Background technology
Precipitated calcium carbonate is widely used in plastics, rubber, adhesive, painting as a kind of important inorganic powder material
The fields such as material, cosmetics, textile and sewage purification, industrial requirement grows with each passing day.The preparation method of precipitated calcium carbonate is with carbon
Based on change method and double decomposition, in addition with microemulsion method, emulsion liquid membrane, sol-gal process.Carbonizatin method is nano-calcium carbonate
The core process of production, it is by CO2With Ca (OH)2Gas liquid reaction between slurry prepares calcium carbonate.In industrial production,
Generally first by selected limestone calcination, quick lime and kiln gas are obtained.Quick lime obtains Ca (OH) through digestion process2Suspend
Liquid；Kiln gas then passes through purification, used as CO2Source and Ca (OH)2Suspension reacts.After reaching carbonization terminal, by the calcium carbonate for obtaining
Dewatering slurries are dried, that is, obtain nano-calcium carbonate product.Carbonizatin method can be with effectively utilizes mineral resources, low cost and environmental protection
The method being most widely used in industry at present.
At present, the carbonizatin method for studying comparative maturity prepares the process of precipitated calcium carbonate and has interval bubbling carbonation method, many
Level multilevel spray carbonization and high-gravity carbonation method.Interval bubbling carbonation method process is simple, equipment investment is few, but gas-liquid mass transfer is paid no attention to
Think, Granularity Distribution width.Precipitated calcium carbonate particle diameter distribution prepared by high-gravity carbonation method is narrower, and the carburizing reagent time is short.But
It is that the method energy consumption is big, technology controlling and process is difficult, and equipment cost is high.Multi-stage spray carbonizatin method is more beneficial for the mass transfer of gas, production
Ability is big, stable operation, the crystalline form of easily controllable product and granularity.But this carbonization technique generally needs point multistage to carry out carbon
Change, and the product slurry that obtains of carbonization is still to through the process step such as dehydrating, and production process is complicated.
The content of the invention：
This patent provides a kind of method for continuously preparing precipitated calcium carbonate.
A kind of continuous preparation method of precipitated calcium carbonate, comprises the steps：
By the Ca (OH) of certain mass2Deionized water is dissolved in, the Ca (OH) that mass fraction is 0.05 ~ 1wt% is configured to2Suspension.
By Ca (OH)2Suspension and CO2Compressed gas are connected on respectively the liquid feeding end and inlet end of two fluid atomizing nozzles, using two fluids
Atomizer mixes come the microcosmic for realizing gas-liquid two-phase, strengthens gas-liquid mass transfer process and carries out carburizing reagent.CO2Gas stream
Amount control is in the range of 3 ~ 12 L/min.Ca(OH)2Liquid is by CO2Good pressure distribution into micron order drop while, be carbonized
Reaction, generates precipitated calcium carbonate, and is dried rapidly by 150 ~ 400 DEG C of stream of hot air, directly obtains precipitated calcium carbonate dry powder.
Compared with the preparation method of traditional lightweight calcium carbonate, the present invention has advantages below：Building-up process is simple, it is not necessary to
Multistage carbonation can be carbonized completely；Gas-liquid mass transfer effect is good, and the carburizing reagent time is short；Product is calcium carbonate powder rather than slurry,
Without the need for extra drying steps；Can continuous operation, it is easy to commercially produce.
Description of the drawings
Fig. 1 is the scanning electron microscope diagram piece of the calcium carbonate of embodiment 1.
Fig. 2 is the X ray diffracting spectrum of the calcium carbonate of embodiment 1.
Specific embodiment
With reference to specific embodiment, the present invention will be further elaborated
Embodiment 1
By 1 g Ca (OH)2Pressed powder is dissolved in 999 g deionized waters, is configured to the Ca (OH) that mass fraction is 0.1wt%2
Solution.Control CO2Gas flow is 3 L/min, Ca (OH)2Solution Jing peristaltic pumps, are pumped to two fluid atomizing nozzles, by CO2Point
Micron order drop is dissipated into, is then dried by 400 DEG C of stream of hot air.Obtain precipitated calcium carbonate powder.Shone by Fig. 1 ESEMs
Piece finds out that calcium carbonate prepared by the present invention is ball shape structure, and particle size is several microns, by calcite and vaterite two
Plant the calcium carbonate composition of crystal formation.
Embodiment 2
By 3 g Ca (OH)2Pressed powder is dissolved in 997 g ionized waters, is configured to the Ca (OH) that mass fraction is 0.3wt%2
Solution.Control CO2Gas flow is 12 L/min, Ca (OH)2Solution Jing peristaltic pumps, are pumped to two fluid atomizing nozzles, by CO2
Micron order drop is dispersed into, is then dried by 300 DEG C of stream of hot air.Obtain spherical light calcium carbonate powder.
Embodiment 3
By 6 g Ca (OH)2Pressed powder is dissolved in 994 g deionized waters, is configured to the Ca (OH) that mass fraction is 0.6wt%2
Solution.Control CO2Gas flow is 6 L/min, Ca (OH)2Solution Jing peristaltic pumps, are pumped to two fluid atomizing nozzles, by CO2Point
Micron order drop is dissipated into, is then dried by 200 DEG C of stream of hot air.Obtain spherical light calcium carbonate powder.
Embodiment 4
By 8 g Ca (OH)2Pressed powder is dissolved in 992 g deionized waters, is configured to the Ca (OH) that mass fraction is 0.8wt%2
Solution.Control CO2Gas flow is 12 L/min, Ca (OH)2Solution Jing peristaltic pumps, are pumped to two fluid atomizing nozzles, by CO2
Micron order drop is dispersed into, is then dried by 300 DEG C of stream of hot air.Obtain precipitated calcium carbonate powder.
Embodiment 5
By 0.5 g Ca (OH)2Pressed powder is dissolved in 999.5 g deionized waters, is configured to the Ca that mass fraction is 0.05wt%
(OH)2Solution.Control CO2Gas flow is 12 L/min, Ca (OH)2Solution Jing peristaltic pumps, are pumped to two fluid atomizing nozzles,
By CO2Micron order drop is dispersed into, is then dried by 150 DEG C of stream of hot air.Obtain spherical light calcium carbonate powder.
The present invention is by using two fluid atomizing nozzles, using high pressure CO2Gas is by Ca (OH)2Suspension is dispersed into micron order
Drop, carburizing reagent is completed within a very short time, greatly improves carburizing reagent efficiency.The positive contact of gas-liquid two-phase, it is to avoid
Pneumatic jack phenomenon when throughput is excessive.By controlling Ca (OH)2Turbid liquid concentration, CO2Gas flow and stream of hot air temperature this three
Individual technological parameter, can be obtained light calcium carbonate powder with a step, greatly simplify the production process of precipitated calcium carbonate.
Claims (4)
1. a kind of preparation method of precipitated calcium carbonate, it is characterised in that comprise the following steps：
By Ca (OH)2Suspension and CO2Compressed gas are respectively by two fluid atomizing nozzles, Ca (OH)2Liquid is by high pressure CO2Dispersion
While into micron order drop, there is carburizing reagent, generate precipitated calcium carbonate, and be dried by stream of hot air rapidly, directly obtain
Light calcium carbonate powder.
2. precipitated calcium carbonate preparation method according to claim 1, it is characterised in that Ca (OH)2Suspension mass fraction is
0.05~1wt%。
3. precipitated calcium carbonate preparation method according to claim 1, it is characterised in that CO2Flow is 3 ~ 12 L/min.
4. precipitated calcium carbonate preparation method according to claim 1, it is characterised in that the heat for being dried spray droplet is empty
The temperature of air-flow is 150 ~ 400 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611077379.1A CN106587125B (en) | 2016-11-30 | 2016-11-30 | A kind of preparation method of precipitated calcium carbonate |
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| CN201611077379.1A CN106587125B (en) | 2016-11-30 | 2016-11-30 | A kind of preparation method of precipitated calcium carbonate |
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| CN106587125B CN106587125B (en) | 2018-05-04 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249466A (en) * | 2018-01-28 | 2018-07-06 | 宁波普莱斯帝金属制品有限公司 | A kind of preparation method of calcium oxide-calcium carbonate core shell nanoparticles |
| CN108264077A (en) * | 2018-01-28 | 2018-07-10 | 宁波普莱斯帝金属制品有限公司 | A kind of preparation method of the core shell nanoparticles package assembly with calcium carbonate shell |
| CN108314072A (en) * | 2018-01-28 | 2018-07-24 | 宁波普莱斯帝金属制品有限公司 | A kind of preparation method of the core shell nanoparticles with calcium carbonate shell |
| CN108328639A (en) * | 2018-01-28 | 2018-07-27 | 宁波普莱斯帝金属制品有限公司 | A kind of preparation method of calcium carbonate bone rod-like nano particle |
| CN108390031A (en) * | 2018-01-28 | 2018-08-10 | 宁波普莱斯帝金属制品有限公司 | A kind of preparation method of the core shell nanoparticles composite material with calcium carbonate shell |
| CN112774611A (en) * | 2021-01-18 | 2021-05-11 | 广西大学 | Hypergravity micro-interface mass transfer enhanced reaction-crystallization drying coupling all-in-one machine |
| CN112875739A (en) * | 2021-03-18 | 2021-06-01 | 长兴谐源化工助剂有限公司 | Preparation method of active light calcium carbonate |
| CN115974125A (en) * | 2022-12-24 | 2023-04-18 | 宣城新威华化工科技有限公司 | Preparation method of active light nano calcium carbonate |
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| CN103058248A (en) * | 2013-01-05 | 2013-04-24 | 刘立文 | Equipment and process for preparing nano calcium carbonate by gypsum |
| CN104326498A (en) * | 2014-08-25 | 2015-02-04 | 凌庭生 | Device utilizing high-temperature flue gas with high CO2 content to produce ultrafine active calcium powder and production method thereof |
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| CN103058248A (en) * | 2013-01-05 | 2013-04-24 | 刘立文 | Equipment and process for preparing nano calcium carbonate by gypsum |
| CN104326498A (en) * | 2014-08-25 | 2015-02-04 | 凌庭生 | Device utilizing high-temperature flue gas with high CO2 content to produce ultrafine active calcium powder and production method thereof |
Non-Patent Citations (2)
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249466A (en) * | 2018-01-28 | 2018-07-06 | 宁波普莱斯帝金属制品有限公司 | A kind of preparation method of calcium oxide-calcium carbonate core shell nanoparticles |
| CN108264077A (en) * | 2018-01-28 | 2018-07-10 | 宁波普莱斯帝金属制品有限公司 | A kind of preparation method of the core shell nanoparticles package assembly with calcium carbonate shell |
| CN108314072A (en) * | 2018-01-28 | 2018-07-24 | 宁波普莱斯帝金属制品有限公司 | A kind of preparation method of the core shell nanoparticles with calcium carbonate shell |
| CN108328639A (en) * | 2018-01-28 | 2018-07-27 | 宁波普莱斯帝金属制品有限公司 | A kind of preparation method of calcium carbonate bone rod-like nano particle |
| CN108390031A (en) * | 2018-01-28 | 2018-08-10 | 宁波普莱斯帝金属制品有限公司 | A kind of preparation method of the core shell nanoparticles composite material with calcium carbonate shell |
| CN112774611A (en) * | 2021-01-18 | 2021-05-11 | 广西大学 | Hypergravity micro-interface mass transfer enhanced reaction-crystallization drying coupling all-in-one machine |
| CN112774611B (en) * | 2021-01-18 | 2024-01-30 | 广西大学 | Super-gravity micro-interface mass transfer strengthening reaction-crystallization drying coupling integrated machine |
| CN112875739A (en) * | 2021-03-18 | 2021-06-01 | 长兴谐源化工助剂有限公司 | Preparation method of active light calcium carbonate |
| CN112875739B (en) * | 2021-03-18 | 2022-10-14 | 长兴谐源化工助剂有限公司 | Preparation method of active light calcium carbonate |
| CN115974125A (en) * | 2022-12-24 | 2023-04-18 | 宣城新威华化工科技有限公司 | Preparation method of active light nano calcium carbonate |
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| CN106587125B (en) | 2018-05-04 |
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