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Extraction solution for preparing active light calcium carbonate, application and preparation method of active light calcium carbonate

An active light calcium carbonate technology, applied in calcium carbonate/strontium/barium, separation methods, solvent extraction, etc., can solve the problems of low concentration of calcium solution, low purity of calcium carbonate, difficulty in promotion and application of calcium carbonate, etc.

Active Publication Date: 2020-02-07
厦门市汇创源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor water solubility of calcium hydroxide, using this method to separate calcium and magnesium in dolomite requires a large amount of water to leach calcium, which is extremely inefficient, and the calcium solution obtained has a very low concentration and contains impurities, so the obtained calcium carbonate low purity
[0012] The above method utilizes calcium carbide slag or dolomite to prepare active light CaCO 3 Especially nano CaCO 3 There are many technical defects in the process, which makes the further promotion and application of calcium carbonate more difficult. Therefore, how to comprehensively utilize dolomite, calcium carbide slag or low-grade Ca(OH) at low cost, high efficiency and high added value 2 It is still a problem that plagues all enterprises

Method used

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  • Extraction solution for preparing active light calcium carbonate, application and preparation method of active light calcium carbonate
  • Extraction solution for preparing active light calcium carbonate, application and preparation method of active light calcium carbonate
  • Extraction solution for preparing active light calcium carbonate, application and preparation method of active light calcium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] (1) Take 270g of 4-heptanone, 21g of dibutylamine, and 9g of propionic acid, mix them uniformly, and prepare an organic extraction solution.

[0116] (2) Mix the prepared organic extraction solution with 8% Ca(OH) 2 Mixing calcium carbide slurry to control Ca in calcium carbide slurry 2+ The molar ratio of propionic acid to the organic extract solution is 1:2. After fully reacting, filter out the insoluble matter, stand and separate layers, the upper layer will get an organic solution containing dibutylamine and 4-heptanone, and the lower layer will get an organic solution containing calcium propionate of aqueous solution.

[0117] (3) Put pure CO 2 The gas of step 2) fully contacts with the organic solution that obtains, controls CO 2 with Ca 2+ The molar ratio was 0.9:1, and the organic phase obtained dibutylamine carbonate.

[0118] (4) Add the organic solution containing dibutylamine carbonate that step 2) obtains to the calcium propionate aqueous solution and ...

Embodiment 2

[0121] (1) Get 180g of n-octanol, 72g of dodecylamine, and 15g of formic acid, mix them uniformly, and prepare an organic extraction solution.

[0122] (2) Mix the prepared organic extraction solution with 10% Ca(OH) 2 Mixing calcium carbide slurry to control Ca in calcium carbide slurry 2+ The molar ratio with formic acid in the organic extraction solution is 1:2.2. After fully reacting, filter out the insoluble matter, stand and separate layers, the upper layer will obtain an organic solution containing dodecylamine and n-octanol, and the lower layer will obtain an aqueous solution containing calcium formate.

[0123] (3) Will contain 20wt% CO 2 The flue gas is in full contact with the organic solution obtained in step 2), and the CO is controlled 2 with Ca 2+ The molar ratio is 1:1, and the organic phase obtains dodecylamine carbonate.

[0124] (4) Add the calcium formate aqueous solution obtained in step 2) and the organic solution containing dodecylamine carbonate obt...

Embodiment 3

[0127] (1) Get 50g of butyl acrylate, 172g of octadecylamine, and 25g of acetic acid, mix them uniformly, and prepare an organic extraction solution.

[0128] (2) the prepared organic extraction solution and 20wt% Ca(OH) 2 Lime milk mixed to control Ca in lime milk 2 + The molar ratio with acetic acid in the organic extraction solution is 1:2.3. After fully reacting, filter out the insoluble matter, stand and separate layers, the upper layer will obtain an organic solution containing octadecylamine and butyl acrylate, and the lower layer will obtain an aqueous solution containing calcium acetate.

[0129] (3) Put pure CO 2 The gas of step 2) fully contacts with the organic solution that obtains, controls CO 2 with Ca 2+ The molar ratio is 1.1:1, and the organic phase obtains octadecylamine carbonate.

[0130] (4) Add the calcium acetate aqueous solution obtained in step 2) and the organic solution containing octadecylamine carbonate obtained in step 3) to the reactor and ...

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Abstract

The invention relates to an extraction solution for preparing active light calcium carbonate, application and a preparation method of the active light calcium carbonate. The extraction solution is selected from any one of a first extraction solution and a second extraction solution; the first extraction solution comprises an organic extraction solvent, organic amine and carboxylic acid, the organic extraction solvent is difficult to dissolve in water and can dissolve the organic amine, the organic amine is difficult to dissolve in water and easy to dissolve in the organic extraction solvent, and organic amine carboxylate formed by organic amine and carboxylic acid is easy to dissolve in the organic extraction solvent, calcium carboxylate obtained by reacting carboxylic acid with calcium hydroxide is easy to dissolve in water and difficult to dissolve in the organic extraction solvent; the second extraction solution comprises an organic extraction solvent, organic amine and carboxylic acid, the organic amine is difficult to dissolve in water and easy to dissolve in the organic extraction solvent, and calcium carboxylate obtained by reacting carboxylic acid with calcium hydroxide iseasy to dissolve in the organic extraction solvent and difficult to dissolve in water. According to the extraction solution disclosed by the invention, CaCO3 synthesis and surface treatment are combined into one, so that superfine CaCO3, particularly nano CaCO3, can be easily obtained.

Description

technical field [0001] The present invention relates to an extracting solution for preparing active light calcium carbonate, its use and a preparation method of active light calcium carbonate, more specifically a kind of extraction solution selected from calcium carbide slag slurry, milk of lime and dolomite slurry A method for preparing nano calcium carbonate as a calcium source. Background technique [0002] Light calcium carbonate is mainly divided into ordinary light calcium and active light calcium. Due to the disadvantages of poor dispersion, high oil absorption value, and poor fluidity, ordinary light calcium can only act as a filler and its application fields are limited. Active light calcium, especially nano-calcium carbonate, can be used as functional fillers such as fillers, reinforcing agents, and active agents because of its good dispersibility, smoothness, fluidity, and hydrophobicity. It is widely used in papermaking, coatings, Ink, chemical building material...

Claims

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Application Information

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IPC IPC(8): B01D11/04C01F11/18
CPCB01D11/04B01D11/0492C01F11/183
Inventor 钟劲光钟俊
Owner 厦门市汇创源科技有限公司
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