CN1061392A - A kind of method of making crystal calcium carbonate - Google Patents
A kind of method of making crystal calcium carbonate Download PDFInfo
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- CN1061392A CN1061392A CN 91109763 CN91109763A CN1061392A CN 1061392 A CN1061392 A CN 1061392A CN 91109763 CN91109763 CN 91109763 CN 91109763 A CN91109763 A CN 91109763A CN 1061392 A CN1061392 A CN 1061392A
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- reaction
- ammonium chloride
- temperature
- caco
- ammonium
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Abstract
A kind of method of manufacturing carbonate, particularly lime carbonate is to adopt under the existence of ammonium chloride or mixed-ammonium salt or other ammonium salts, reacts to decompose Wingdale or rhombspar is made the quality lime carbonate identical with acid hydrolyzation under 100～600 ℃ of temperature.
Description
The present invention relates to a kind of method of making crystal calcium carbonate, particularly adopt ammonium salt under the condition of lesser temps, to decompose, hydrogenchloride of generation (HCl) and Wingdale (CaCO
3) reaction generation calcium chloride (CaCl
2), and then with reaction process in intermediate product bicarbonate of ammonia (NH
4HCO
3) and ammonium hydroxide (NH
4OH) reaction (can see in the reaction formula below) makes crystal calcium carbonate.
Be to adopt Wingdale and hydrochloric acid to react to produce CaCl in the prior art
2, and then and NH
4OH and CO
2Lime carbonate is made in reaction, and its reaction formula is as follows:
The shortcoming of this method is that raw material consumption is big, as produces one ton of CaCO
3Need 2.6 tons of 30% hydrochloric acid, 2 tons of 20% ammoniacal liquor, cost is too high.
Characteristics of the present invention are to utilize ammonium salt to decompose hydrogenchloride and the CaCO that produces under lower temperature
3Reaction generates CaCl rapidly
2, and then with circulation in carbon ammonium salt reaction produce pure CaCO
3, its quality can compare favourably with the hydrochloric acid decomposition method of prior art, its reaction formula following (salt is example with ammonium chloride):
(1) formula
(2) formula
(3) formula
Concrete steps are seen example 1: flow process is seen Fig. 1,1-reactor, 2-resorber, 3-strainer, 4-CaCO
3Synthesizer, 5-CaCO
3Separator, 6-ammonium chloride saturex.
With CaCO
3Content is at the Wingdale 100Kg more than 95%, 30～50 ℃ of saturated ammonium chloride solution 100Kg, solid particulate ammonium chloride 70Kg put into reactor 1 in the lump in (input amount is 130Kg for the first time), the equipment 6, heating, and it is being reacted more than 100 ℃, along with the carrying out of reaction, temperature is brought up to 600 ℃ gradually and made CaCO
3Decompose the CO of generation fully
2, NH
3And H
2O absorbs in equipment 2 with the 200Kg30 in the equipment 6～40 ℃ saturated ammonium chloride solution.Get 30～40 ℃ of saturated ammonium chloride solution 400～700Kg in the slave unit 6, divide to add in the reactor 1 for several times and leach CaCl
2, leaching liquid puts into that equipment 3 filters, static purification and activated carbon decolorizing, tell impurity after solution move in the synthesis device 4, under 50～80 ℃ of temperature, the absorption liquid reaction with equipment 2 generates pure CaCO
3Tell finished product CaCO through separator 5 and through cleaning
3, pack after the drying.Solution in the equipment 4 moves into equipment 6 and cools off.For the balance that keeps water and ammonium chloride should be with make up water and ammonium chloride constantly.
Wanting ben here be that temperature in the reaction formula (1) is reacted between 100 ℃～600 ℃, and its reason is NH
4Cl generates NH under 100 ℃ of heating under saturated solution
4OH and HCl facilitate HCl and CaCO
3Reaction, along with the carrying out of reaction, after the moisture content of reaction solution had been consumed, solid ammonium chloride was decomposed into NH in the time of 338 ℃
3And HCl, such HCl that produces continues and CaCO
3Reaction is carried out can making solid CaCO fully for making reaction
3Decompose, so temperature should be brought up to about 600 ℃.The NH that this method produced
3And CO
2Can be used as the raw material of manufacturing caustic soda and soda ash, urea.
Example 1 above-mentioned is to adopt ammonium chloride, and other ammonium salt and mixture also can react by above-mentioned steps, and its corresponding conditions is as follows shown in the face form:
| Embodiment | Name of material | Reaction conditions | Yield % |
| Example 1 example 2 examples 3 examples 4 examples 5 examples 6 examples 7 | Ammonium chloride ammonium chloride+ammonium nitrate ammonium chloride+ammonium acetate ammonium chloride ammonium acetate ammonium chloride+nitric acid dolomite (MgCO3） | T=100～600 ℃ liquid phase and solid phase reaction 70 T=100～130 ℃ of liquid phase reactor 5-10 T=100～130 ℃ of liquid phase reactor 5-10 T=100～130 ℃ of liquid phase reactor 5-8 T=100～130 ℃ of liquid phase reactor 3-7 T＞100 ℃ of liquid phase reactors, pressure＜10Kg/cm2＞5 T=100～600 ℃ liquid phase and solid state reaction 70 | |
The characteristics of above-mentioned flow process also can be seen being provided with to discharge and carry out under the waste water.The CaCO that is produced
3Content reaches more than 98%, and free alkali does not have, and granularity is below 45 μ, can decompose fully under hydrochloric acid.
Claims (5)
1, a kind of method of making carbonate is characterized in that utilizing ammonium salt, carries out under 100～600 ℃ of temperature of reaction.
2, according to the method for claim 1, it is characterized in that utilizing ammonium chloride, make lime carbonate down for 100～600 ℃ in temperature of reaction.
3, according to the method for claim 1, it is characterized in that utilizing ammonium acetate, make lime carbonate down for 100～130 ℃ in temperature of reaction.
4, according to the method for claim 1, the NH that it is characterized in that wherein utilizing in the reaction formula and given birth to
3And CO
2Can be used as the raw material of preparation caustic soda and soda ash and urea.
5, according to the method for claim 1, it is characterized in that utilizing ammonium chloride and ammonium nitrate, make lime carbonate down for 100～130 ℃ in temperature of reaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91109763 CN1025555C (en) | 1991-10-19 | 1991-10-19 | Process for manufacture of crystal calcium carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91109763 CN1025555C (en) | 1991-10-19 | 1991-10-19 | Process for manufacture of crystal calcium carbonate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1061392A true CN1061392A (en) | 1992-05-27 |
| CN1025555C CN1025555C (en) | 1994-08-03 |
Family
ID=4909976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91109763 Expired - Fee Related CN1025555C (en) | 1991-10-19 | 1991-10-19 | Process for manufacture of crystal calcium carbonate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1025555C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267713A (en) * | 2011-07-07 | 2011-12-07 | 贵州大学 | Method for producing high-quality light calcium carbonate by ammonium salt circulation process |
| CN104843756A (en) * | 2015-03-26 | 2015-08-19 | 龙岩紫云化学科技有限公司 | Decomposition method of carbonatite |
| CN112110469A (en) * | 2020-10-14 | 2020-12-22 | 河北工业大学 | Method for preparing vaterite type calcium carbonate |
-
1991
- 1991-10-19 CN CN 91109763 patent/CN1025555C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267713A (en) * | 2011-07-07 | 2011-12-07 | 贵州大学 | Method for producing high-quality light calcium carbonate by ammonium salt circulation process |
| CN102267713B (en) * | 2011-07-07 | 2013-07-24 | 贵州大学 | Method for producing high-quality light calcium carbonate by ammonium salt circulation process |
| CN104843756A (en) * | 2015-03-26 | 2015-08-19 | 龙岩紫云化学科技有限公司 | Decomposition method of carbonatite |
| CN112110469A (en) * | 2020-10-14 | 2020-12-22 | 河北工业大学 | Method for preparing vaterite type calcium carbonate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1025555C (en) | 1994-08-03 |
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