Preparation method of suspended nano-calcium carbonate for food

A nano-calcium carbonate, calcium carbonate technology, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of side effects, unfavorable absorption, large particle size and other problems of stone disease, and achieve no three wastes discharge, high production efficiency and simple production process Effect

Inactive Publication Date: 2010-11-10
HENAN KELI NEW MATERIALS
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AI Technical Summary

Problems solved by technology

[0004] However, ordinary calcium carbonate (ordinary light calcium or heavy calcium) is not conducive to the absorption of the human body due to its relatively large particle size, and has side effects on cardiovascular and stone diseases, while ultra-fine suspended nano-calcium carbonate has a large particle size due to its own particle size. Fine, with a particle size of 60-120 nanometers, it can be suspended in liquid and exists in microscopic nano-scale particle size, which is conducive to the absorption of the human body. Therefore, suspended nano-calcium carbonate for food is an ideal calcium source for calcium supplementation

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] Carbonization: 1.5 cubic meters of clean calcium hydroxide slurry with a concentration of 8% is added to a 2 cubic meter reactor, the initial temperature of carbonization is 20°C, carbon dioxide gas with a volume fraction of 35% is introduced for carbonization, carbonization After 10 minutes, add 0.4kg of sucrose and 0.6kg of sodium citrate, and then continue the carbonization reaction until the pH value of the calcium carbonate slurry reaches 7, then the reaction can be stopped, and then the slurry is press-filtered, washed and then heated at 110- Perform flash drying at 120°C, and then pulverize and classify to obtain the finished product.

[0024] The particle size of the finished product is 60-80nm, and the measured specific surface area is 23.15m 2 / g, the powder particle size of this product is less than 4μm reaches 98%, and the suspension performance is excellent.

Embodiment 2

[0026] Carbonization: Add 1.5 cubic meters of clean calcium hydroxide slurry with a concentration of 6% in a 2 cubic meter reactor, the initial temperature of carbonization is 15°C, and carbon dioxide gas with a volume fraction of 25% is introduced for carbonization, carbonization After 15 minutes, add 0.8 kg of sodium tripolyphosphate, and then continue the carbonization reaction until the pH value of the calcium carbonate slurry reaches 7, then the reaction can be stopped, and then the slurry is press-filtered, washed and then carried out at 110°C-120°C The finished product can be obtained after flash drying, crushing and classification.

[0027] The particle size of the finished product is 60-80nm, and the measured specific surface area is 23.67m 2 / g, the powder particle size of this product is less than 4μm reaches 98%, and the suspension performance is excellent.

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Abstract

The invention discloses a preparation method of suspended nano-calcium carbonate for food. The method comprises the steps of high-temperature calcining limestone, taking out optimum quicklime, digesting, sieving and removing impurities, introducing CO2 gas, and adding a crystal form control agent for carbonization reaction under stirring; and then press filtering, washing, drying, crushing and classifying, and preparing the suspended nano-calcium carbonate for food. The method for producing the suspended nano-calcium carbonate for food has high efficiency, no environment pollution and good quality.

Description

technical field [0001] The invention discloses a preparation method of nano-calcium carbonate, in particular a preparation method of suspended nano-calcium carbonate for food. Background technique [0002] According to the 2002 "Nutrition and Health of Chinese Residents" survey report, the calcium deficiency of Chinese people is very serious, and the per capita daily calcium intake of residents is 391 mg, which is only equivalent to 41% of the recommended intake. [0003] The selection of calcium supplements is based on the principles of safety, no side effects, high calcium content, and high absorption rate. Calcium carbonate, as a natural, high calcium content, and easy-to-absorb calcium source, is favored by domestic and global calcium supplement companies. , its absorption rate can reach 39%, soluble in gastric acid, has become a calcium supplement with many dosage forms and applications, and combined with vitamin D3 can better promote calcium absorption. [0004] Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18
Inventor 王初哲熊维湘朱跃斌王建伟马跃东
Owner HENAN KELI NEW MATERIALS
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