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Preparation method and application for micron vaterite type food-grade calcium carbonate

A technology of calcium carbonate and vaterite, applied in the direction of calcium carbonate/strontium/barium, applications, food ingredients, etc., can solve problems such as unevenness, increase costs, increase processing procedures, etc., achieve uniform dispersion, reduce requirements, and improve carbonization efficiency Effect

Inactive Publication Date: 2016-08-17
WUHAN INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve this problem, a certain amount of food stabilizer is generally added when using calcium carbonate, and the surface of the calcium carbonate product is modified again, relying on increasing the viscosity to improve the floating effect, but at this time, the addition is not only uneven, but also improves Cost and increased processing procedures, so calcium carbonate with food stabilizer added when preparing calcium carbonate is more popular with manufacturers, and the market competitiveness is large

Method used

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  • Preparation method and application for micron vaterite type food-grade calcium carbonate
  • Preparation method and application for micron vaterite type food-grade calcium carbonate
  • Preparation method and application for micron vaterite type food-grade calcium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1): Grinding and pulverizing the limestone into limestone powder with a fineness of 150 mesh.

[0030] Step 2): Add 5 mol / L hydrochloric acid solution to the limestone powder in step 1 at a molar ratio of hydrochloric acid:limestone of 1:1, and stir for 60 minutes at room temperature. CO collected from the reaction 2 gas.

[0031] Step 3): In the solution that step 2 obtains, add according to impurity Fe:H 2 o 2 Add H at a molar ratio of 2:1 2 o 2 , after the reaction is complete, press Ba 2+ with H 2 SO 4 Add H at a molar ratio of 1:1 2 SO 4 , heated to 80°C, and kept at a constant temperature for 20 minutes to precipitate barium ions. Then add Ca(OH) 2 , adjust the pH value to 11.5, remove Si, Fe, Mg, Al, Cd, Hg, Mn and other ions, and obtain CaCl by suction filtration 2 Clear solution.

[0032] Step 4): Press Ca to Step 3 2+ : The molar ratio of ammonia water is 1:2, adding 10mol / L ammonia water, and adding phosphoric acid with a volume percentage ...

Embodiment 2

[0039] Step 1): Grinding and pulverizing the limestone into limestone powder with a fineness of 100 mesh.

[0040] Step 2): Add 5 mol / L hydrochloric acid solution to the limestone powder in step 1 at a molar ratio of hydrochloric acid:limestone of 1.5:1, and stir for 60 minutes at room temperature. CO collected from the reaction 2 gas.

[0041] Step 3): In the solution that step 2 obtains, add according to impurity Fe:H 2 o 2 Add H at a molar ratio of 2:1 2 o 2 , after the reaction is complete, press Ba 2+ with H 2 SO 4 Add H at a molar ratio of 1:1 2 SO 4 , heated to 80°C, and kept at a constant temperature for 20 minutes to precipitate barium ions. Then add CaO, adjust the pH value to 11.5, remove Si, Fe, Mg, Al, Cd, Hg, Mn ions, and obtain CaCl by suction filtration 2 Clear solution.

[0042] Step 4): Press Ca to step 3 2+ : The molar ratio of ammonia water is 1:2, adding 10mol / L ammonia water, and adding sodium pyrophosphate with a volume percentage of 0.05%, ...

Embodiment 3

[0046] Step 1): Grinding and pulverizing the limestone into limestone powder with a fineness of 100 mesh.

[0047] Step 2): Add 5 mol / L hydrochloric acid solution to the limestone powder in step 1 at a molar ratio of hydrochloric acid:limestone of 2:1, and stir for 60 minutes at room temperature. CO collected from the reaction 2 gas.

[0048] Step 3): In the solution that step 2 obtains, add according to impurity Fe:H 2 o 2 Add H at a molar ratio of 2:1 2 o 2 , after the reaction is complete, press Ba 2+ with H 2 SO 4 Add H at a molar ratio of 1:1 2 SO 4 , heated to 80°C, and kept at a constant temperature for 20 minutes to precipitate barium ions. Then add ammonia water, adjust the pH value to 12, remove Si, Fe, Mg, Al, Cd, Hg, Mn ions, and obtain CaCl by suction filtration 2 Clear solution.

[0049] Step 4): Press Ca to Step 3 2+ : The molar ratio of ammonia water is 1:1, adding 10mol / L ammonia water, and adding sodium tripolyphosphate with a volume percentage o...

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Abstract

The invention discloses a preparation method and application for micron vaterite type food-grade calcium carbonate. By adopting a gas-liquid two-phase carbonization process and an in-situ surface modification process to prepare vaterite type food-grade calcium carbonate, the preparation method concretely comprises the following steps: with limestone as a raw material, grinding the raw material into powder, carrying out dissolving by utilizing acid, then adding H2O2, H2SO4, Ca(OH)2 and the like, and removing impurities like Fe, Ba, Mg, Al, Cd and Hg so as to obtain a pure calcium solution; and adding ammonia water, a controlling agent with a food-grade crystal form and an anti-settling agent into a CaCl2 solution, introducing CO2, and carrying out gas-liquid two-phase carbonization reaction so as to prepare the micron vaterite type food-grade calcium carbonate with good dispersion and suspension performances, wherein the micron vaterite type food-grade calcium carbonate is micron spherical calcium carbonate and has a stable crystal form. The calcium carbonate product prepared by using the method provided by the invention is spherical particles, is fine and uniform, has good dispersity and suspension property and strong settlement resistance, can be directly used as a calcium strengthening agent in liquid beverages like milk, soymilk and fruit juice.

Description

technical field [0001] The invention belongs to the technical field of food grade chemical industry, and mainly relates to a preparation method and application of micron vaterite type food calcium carbonate. Background technique [0002] Calcium carbonate has few side effects, is relatively cheap, and has a high absorption rate. It is listed in the National Pharmacopoeia. It is the first calcium supplement recommended by the Chinese Nutrition Society, and it is also a calcium preparation that is generally recognized internationally. Calcium carbonate crystals have three crystal phases: calcite, vaterite, and aragonite; among them, vaterite calcium carbonate has a large specific surface area, high solubility and dispersion properties, and a small specific gravity, precisely because these characteristics can meet Food-grade calcium carbonate has requirements for its specific surface area, specific gravity, dispersibility, and solubility, and can improve the physical properties...

Claims

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Application Information

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IPC IPC(8): C01F11/18A23L33/16
CPCC01F11/18A23V2002/00C01P2002/72C01P2004/03C01P2004/61A23V2250/1578
Inventor 池汝安王芬余军霞肖春桥张锦
Owner WUHAN INSTITUTE OF TECHNOLOGY
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