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Preparation method of superfine tricalcium phosphate

A technology of fine tricalcium phosphate and phosphoric acid, applied in the field of preparation of ultrafine tricalcium phosphate, can solve the problems of slow absorption, low fluency, large particle size, etc. Effect

Inactive Publication Date: 2013-05-01
LIANYUNGANG DEBANG FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the particle size of tricalcium phosphate superfine powder is generally relatively large, the fluency is low, and the human body absorbs it slowly, which cannot meet the needs of modern people for high nutrition.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, a kind of preparation method of superfine tricalcium phosphate, its steps are as follows:

[0015] (1) Use phosphoric acid and calcium carbonate as raw materials for neutralization reaction, and then dry the neutralized solution with a spray dryer at a drying temperature of 370°C to obtain crude tricalcium phosphate;

[0016] (2) Put the crude tricalcium phosphate into the cyclone type high-pressure airflow pulverizer for crushing and grading. The air pressure is 0.7Mpa during the airflow pulverization. Enter the classifier with the updraft, classify at the classification frequency of 55HZ, and classify to obtain ultra-fine tricalcium phosphate with a particle size of 2~3um;

[0017] (3) Pass the ultrafine tricalcium phosphate through 10 sieves, and then perform magnetic separation to obtain the finished ultrafine tricalcium phosphate.

Embodiment 2

[0018] Embodiment 2, a kind of preparation method of superfine tricalcium phosphate, its steps are as follows:

[0019] (1) Use phosphoric acid and calcium carbonate as raw materials for neutralization reaction, then dry the neutralization solution with a spray dryer at a drying temperature of 400°C to obtain crude tricalcium phosphate;

[0020] (2) Put the crude tricalcium phosphate into the cyclone type high-pressure airflow mill for crushing and grading. When the airflow is crushed, the air pressure is 0.8Mpa, and the air is sprayed into the crushing chamber through the supersonic nozzle of the cyclone type high-pressure airflow mill, and the crushed materials Enter the classifier with the updraft, classify at a classifying frequency of 65HZ, and classify to obtain ultrafine tricalcium phosphate with a particle size of 2~3um;

[0021] (3) Pass the ultrafine tricalcium phosphate through a 40-mesh sieve, and then perform magnetic separation to obtain the finished ultrafine tr...

Embodiment 3

[0022] Embodiment 3, a kind of preparation method of superfine tricalcium phosphate, its steps are as follows:

[0023] (1) Use phosphoric acid and calcium carbonate as raw materials for neutralization reaction, and then dry the neutralized solution with a spray dryer at a drying temperature of 390°C to obtain crude tricalcium phosphate;

[0024] (2) Put the crude tricalcium phosphate into the cyclone type high-pressure airflow mill for crushing and grading. The air pressure is 0.75Mpa when the airflow is crushed. Enter the classifier with the updraft, classify at a classifying frequency of 60HZ, and classify to obtain ultrafine tricalcium phosphate with a particle size of 2~3um;

[0025] (3) Pass the ultrafine tricalcium phosphate through a 20-mesh sieve, and then perform magnetic separation to obtain the finished ultrafine tricalcium phosphate.

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Abstract

The invention discloses a preparation method of superfine tricalcium phosphate, which comprises the steps that raw materials (phosphoric acid and calcium carbonate) are used for neutralization reaction; a neutralization solution is dried by a spraying dryer at 370-400 DEG C; a crude tricalcium phosphate product is prepared by drying; the crude tricalcium phosphate product is put into a cyclonic high-pressure airflow crusher for crushing and classification; the pressure of air is 0.7-0.8 MPa when the airflow crushing is conducted; the air is sprayed towards a crushing chamber through a supersonic nozzle of the cyclonic high-pressure airflow crusher; crushed materials enter a classifier with upward airflows; the classification is conducted at classification frequency of 55-65Hz; superfine tricalcium phosphate with a particle size of 2-3 micrometers is obtained by the classification; superfine tricalcium phosphate is allowed to pass through a 10-40-mesh sieve; and finished superfine tricalcium phosphate is obtained after magnetic separation. According to the method, a technology is more reasonable; the particle size and the production cost of superfine tricalcium phosphate can be controlled effectively; and prepared superfine tricalcium phosphate has good fluency and is absorbed by a human body easily.

Description

technical field [0001] The invention relates to a preparation method of tricalcium phosphate, in particular to a preparation method of superfine tricalcium phosphate. Background technique [0002] Tricalcium phosphate is a safe nutritional enhancer with an approximate chemical composition of 10CaO·3P 2 o 5 ·H 2 O, the appearance is white powder, insoluble in water and ethanol, soluble in strong acid and medium strong acid. It is mainly added in food to strengthen the intake of calcium, and it can also be used to prevent or treat the symptoms of calcium deficiency. At present, the particle size of tricalcium phosphate superfine powder is generally relatively large, the fluidity is low, and the human body absorbs it slowly, which cannot meet the needs of modern people for high nutrition. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a preparation method of ultrafine tricalcium phosphate with more reasonable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C19/06
Inventor 赵祥海
Owner LIANYUNGANG DEBANG FINE CHEM
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