CN101037214A - Preparation method of novel nano calcium carbonate - Google Patents
Preparation method of novel nano calcium carbonate Download PDFInfo
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- CN101037214A CN101037214A CN 200710038418 CN200710038418A CN101037214A CN 101037214 A CN101037214 A CN 101037214A CN 200710038418 CN200710038418 CN 200710038418 CN 200710038418 A CN200710038418 A CN 200710038418A CN 101037214 A CN101037214 A CN 101037214A
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- calcium carbonate
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Abstract
The present invention relates to a novel preparation method of nanometer calcium carbonate, which comprises at least the following steps of that: (1)calcium oxide is generated by calcining limestone and is send into a feeder to produce Ca(OH)2 solution which is separated by a screen with 160~320 meshes to obtain Ca(OH)2 fine slurry, and then the Ca(OH)2 fine slurry is diluted to a concentration of 100~150 g/l; (2) the Ca(OH)2 fine slurry obtained in step (1) is injected into a carburizing reaction kettle, at the same time, white granulated sugar having a solid content of 0.1~1% is added into the Ca(OH)2 fine slurry; (3) a mixture gas of carbon dioxide and air, which has a temperature of 10~20 DEG C, is injected into the Ca(OH)2 fine slurry, wherein the volume concentration of carbon dioxide is 15~30% and the flow rate of the carbon dioxide is 200~500 ml/min, and a water-solubility inorganic salt solution is trickled into the Ca(OH)2 fine slurry at the same time, wherein the solute content of Ca(OH)2 is 1~7%, and the trickling is completed within 10~20 min. The present invention can simplify the reaction procedures and reduce energy consumption, besides the obtained product has a grain size of 70~120 nm detected by TEM detecting, an integrate cube and an excellent dispersity.
Description
Technical field
The present invention relates to a kind of new technology for preparing nano-calcium carbonate, especially a kind of by adding the water-soluble inorganic salts solution, simplification reactions steps, the method for producing nano-calcium carbonate of minimizing energy consumption.
Background technology
At present, domestic more complete in order to produce crystal formation, reach the nano-calcium carbonate of certain size requirement.Often adopt and improve carbon dioxide content, improve carbonization temperature, adopt into a series of measures such as metallization processes.Thereby caused complex process, cost improves, the problem that output minimizing etc. makes producer relatively have a headache.
Summary of the invention
The objective of the invention is to overcome a series of problems that existing nano-calcium carbonate is produced, a kind of nano-calcium carbonate new preparation technology is provided, this technology can be with simple technology, and cheap cost is prepared the nano-calcium carbonate of complete in crystal formation, narrowly distributing.
The present invention is achieved through the following technical solutions: a kind of novel method of producing nano-calcium carbonate is characterized in that: drip the water-soluble inorganic salts solution in logical carbonic acid gas, may further comprise the steps successively:
(1) calcined limestone generates calcium oxide, and calcium oxide is sent into material feeder, is digested to Ca (OH) then
2Solution obtains Ca (OH) through 160～320 order sieving separating
2Refining, dilution Ca (OH)
2Refining to concentration is 100～150g/l;
(2) with the Ca (OH) of (1) gained
2Refining joins in the carburizing reagent still, adds Ca (OH)
2The white sugar of refining solid content 0.1～1%;
(3) the feeding temperature is 10～20 ℃ carbonic acid gas and an Air mixing gas, and wherein, the volumetric concentration of carbonic acid gas is 15～35%, and flow is 200～500ml/ minute, drips the water-soluble inorganic salts solution simultaneously, and its solutes content is Ca (OH)
21～7% of solid content, overall solution volume is reaction Ca (OH)
20.5～1% of overall solution volume dripped 10～20 minutes, to reacting completely.
Described Ca (OH)
2The reacting initial temperature of refining is 15～25 ℃.
Described water-soluble inorganic salt is dissolved in the water, and overall solution volume is reaction Ca (OH)
20.5～1% of overall solution volume, described inorganic salt can be the good inorganic salt of solvability in the water such as Repone K, sodium-chlor.
Its TEM test result of described nano-calcium carbonate is 70～120nm.
Advantage of the present invention is:
Simplify reactions steps, reduce energy consumption, the product of making by above-mentioned reaction process is 70～120nm through the TEM test result, and cubes is complete, and is scattered.
Embodiment
Embodiment 1
A kind of novel method of producing nano-calcium carbonate may further comprise the steps:
(1) gets the bucket that lime 3000g puts into 20L, add hot water and be digested to Ca (OH)
2Solution, after separating with 200 purpose sieve after 1 hour Ca (OH)
2Refining, dilution Ca (OH)
2Refining, making its concentration is 120g/l;
(2) with concentration be the Ca (OH) of 120g/l
2Refining 8L joins in the carburizing reagent still (strap clamp cover) of 10L, start agitator on the reactor, open the cooling water switch of reactor, make the temperature of slurries be reduced to 25 ℃, 70ml solution (solutes content 20g) is joined in the separating funnel of reactor top, preparation drips after the reaction beginning, adds Ca (OH) simultaneously
2The white sugar of refining solid content 0.2%;
(3) the feeding temperature is 10～20 ℃ carbonic acid gas and an Air mixing gas, and wherein, the volumetric concentration of carbonic acid gas is 25%, flow is 300ml/ minute, opens air compressor machine and air door simultaneously, the beginning carbonization, drip the water-soluble inorganic salts solution simultaneously, its solutes content is Ca (OH)
21～7% of solid content, overall solution volume is reaction Ca (OH)
20.5～1% of overall solution volume dripped 15 minutes, to the phenolphthalein bleach, reacted completely.Entire reaction is controlled in 1～2 hour and finishes.
Embodiment 2
A kind of novel method of producing nano-calcium carbonate may further comprise the steps:
(1) lime 3000g is put into 20L the bucket, add hot water and be digested to Ca (OH)
2Solution, after separating with 200 purpose sieve after 1 hour Ca (OH)
2Refining, dilution Ca (OH)
2Refining, making its concentration is 130g/l;
(2) with (1) gained concentration be the Ca (OH) of 130g/l
2Refining 8L joins in the carburizing reagent still (strap clamp cover) of 10L, starts agitator on the reactor, opens the cooling water switch of reactor, makes the temperature of slurries be reduced to 20 ℃.100ml solution (solutes content 25g) is joined in the separating funnel of reactor top, prepare after the reaction beginning, to drip.Add Ca (OH) simultaneously
2The white sugar of refining solid content 0.1%;
(3) the feeding temperature is 10～20 ℃ carbonic acid gas and an Air mixing gas, and wherein, the volumetric concentration of carbonic acid gas is 25%, flow is 200ml/ minute, opens air compressor machine and air door simultaneously, the beginning carbonization, drip the water-soluble inorganic salts solution simultaneously, its solutes content is Ca (OH)
21～7% of solid content, overall solution volume is reaction Ca (OH)
20.5～1% of overall solution volume dripped 10 minutes, to the phenolphthalein bleach, reacted completely.Entire reaction is controlled in 1～2 hour and finishes.
The nano-calcium carbonate that embodiment is made carries out the TEM test, and the TEM test result is 70～120nm, and cubes is complete, and is scattered.
Claims (4)
1, a kind of novel method of producing nano-calcium carbonate may further comprise the steps at least in regular turn:
(1) calcined limestone generates calcium oxide, and calcium oxide is sent into material feeder, is digested to Ca (OH)
2Solution gets Ca (OH) after 160～320 order sieving separating
2Refining, dilution Ca (OH)
2Refining to concentration is 100～150g/l;
(2) with the Ca (OH) of (1) gained
2Refining joins in the carburizing reagent still, simultaneously, adds Ca (OH)
2The white sugar of refining solid content 0.1～1%;
(3) the feeding temperature is 10～20 ℃ carbonic acid gas and an Air mixing gas, and the volumetric concentration of carbonic acid gas is 15～35%, and flow is 200～500ml/ minute, drips the water-soluble inorganic salts solution simultaneously, and its solutes content is Ca (OH)
21～7% of solid content, rate of addition was finished at 10～20 minutes.
2, a kind of novel method of producing nano-calcium carbonate according to claim 1 is characterized in that: described Ca (OH)
2The reacting initial temperature of refining is 15～25 ℃.
3, a kind of novel method of producing nano-calcium carbonate according to claim 1 and 2 is characterized in that: overall solution volume is reaction Ca (OH)
20.5～1% of overall solution volume, described inorganic salt can be Repone K, sodium-chlor.
4, a kind of novel nano-calcium carbonate that obtains according to one of claim 1 to 3 method, it is characterized in that: described nano-calcium carbonate size distribution is 70～120nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710038418 CN101037214A (en) | 2007-03-23 | 2007-03-23 | Preparation method of novel nano calcium carbonate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200710038418 CN101037214A (en) | 2007-03-23 | 2007-03-23 | Preparation method of novel nano calcium carbonate |
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| CN101037214A true CN101037214A (en) | 2007-09-19 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102910661A (en) * | 2012-09-14 | 2013-02-06 | 芮城新泰纳米材料有限公司 | Preparation method of high-reinforcement nanometer CaCO3 for silicone sealant |
| CN103395812A (en) * | 2013-07-11 | 2013-11-20 | 大连理工大学 | Method for controlling shape of calcium carbonate in solid carbonization process |
| CN104495902A (en) * | 2014-12-12 | 2015-04-08 | 安徽雪城超细碳酸钙有限公司 | Method for producing special nano calcium carbonate for tires |
| CN105217673A (en) * | 2015-10-21 | 2016-01-06 | 常山县南方碳酸钙有限公司 | A kind of preparation method of high thixotropic silicone adhesive special-purpose nanometer activated Calcium carbonate |
| CN107555461A (en) * | 2017-09-30 | 2018-01-09 | 广西华洋矿源材料有限公司 | A kind of Nano calcium carbonate dedicated preparation method of plastics |
| CN112032229A (en) * | 2020-09-14 | 2020-12-04 | 来安县隆华摩擦材料有限公司 | High-temperature-resistant nano calcium carbonate automobile clutch friction plate and production method thereof |
| CN116477653A (en) * | 2023-03-14 | 2023-07-25 | 建德华明科技有限公司 | Preparation method of nano calcium carbonate |
-
2007
- 2007-03-23 CN CN 200710038418 patent/CN101037214A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102910661A (en) * | 2012-09-14 | 2013-02-06 | 芮城新泰纳米材料有限公司 | Preparation method of high-reinforcement nanometer CaCO3 for silicone sealant |
| CN103395812A (en) * | 2013-07-11 | 2013-11-20 | 大连理工大学 | Method for controlling shape of calcium carbonate in solid carbonization process |
| CN104495902A (en) * | 2014-12-12 | 2015-04-08 | 安徽雪城超细碳酸钙有限公司 | Method for producing special nano calcium carbonate for tires |
| CN104495902B (en) * | 2014-12-12 | 2016-02-03 | 安徽雪城超细碳酸钙有限公司 | The production method that a kind of tire is Nano calcium carbonate dedicated |
| CN105217673A (en) * | 2015-10-21 | 2016-01-06 | 常山县南方碳酸钙有限公司 | A kind of preparation method of high thixotropic silicone adhesive special-purpose nanometer activated Calcium carbonate |
| CN107555461A (en) * | 2017-09-30 | 2018-01-09 | 广西华洋矿源材料有限公司 | A kind of Nano calcium carbonate dedicated preparation method of plastics |
| CN112032229A (en) * | 2020-09-14 | 2020-12-04 | 来安县隆华摩擦材料有限公司 | High-temperature-resistant nano calcium carbonate automobile clutch friction plate and production method thereof |
| CN116477653A (en) * | 2023-03-14 | 2023-07-25 | 建德华明科技有限公司 | Preparation method of nano calcium carbonate |
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Open date: 20070919 |