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A kind of process of preparing toothpaste grade calcium hydrogen phosphate with bovine bone

A calcium hydrogen phosphate, toothpaste-grade technology, applied in the fields of microorganisms and biochemistry, can solve the problems of high cost of extractants, immature food-grade calcium hydrogen phosphate technology, etc., to achieve stable product quality, reduced mining, and less environmental pollution.

Active Publication Date: 2016-05-18
BAOTOU DONGBAO BIO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purified phosphoric acid obtained by the former method is not mature enough for food or for the preparation of food-grade calcium hydrogen phosphate
The purity of phosphoric acid obtained by the latter method is slightly higher, but the cost of the extraction agent used is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Detect the pH value and acid concentration of the calcium water, adjust the pH value to 4.05, and the acid content is 0.3%. Pump 500L of calcium water and 10% coagulant solution-polyferric sulfate from the liquid storage tank into the mixing tank for mixing. The dosage of coagulant is 50L, and then add food-grade For non-ionic polyacrylamide, add 3L and mix for 1min. The supernatant after flocculation enters the filter tank through overflow, and is filtered with activated alumina as the filter medium.

[0025] The calcium water treated with activated alumina is continuously entered into the microfiltration membrane reactor under the suction of the suction pump, and then the aeration device at the bottom of the reactor is opened for continuous aeration. The aeration rate during operation is 6L / h. Adjust the intake valve, control the gas-water ratio to 5:1, and discharge excess gas from the bypass. The membrane inlet pressure is 1.5MPa, and the membrane outlet pressure ...

Embodiment 2

[0032] Detect the pH value and acid concentration of the calcium water, adjust the pH value to 4.35, and the acid content is 0.28%. Pump 500L of calcium water and 10% coagulant solution-polyferric sulfate from the liquid storage tank into the mixing tank for mixing. The dosage of coagulant is 52L, and then add food-grade For non-ionic polyacrylamide, add 3.5L and mix for 1min. The supernatant after flocculation enters the filter tank through overflow, and is filtered with activated alumina as the filter medium.

[0033] The calcium water treated with activated alumina is continuously entered into the microfiltration membrane reactor under the suction of the suction pump, and then the aeration device at the bottom of the reactor is opened for continuous aeration. The aeration rate during operation is 6L / h. Adjust the intake valve, control the gas-water ratio to 5:1, and discharge excess gas from the bypass. The membrane inlet pressure is 1.5MPa, and the membrane outlet pressu...

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Abstract

The invention relates to a process for preparing toothpaste grade calcium hydrogen phosphate by ox bones. The process is used for preparing the toothpaste grade calcium hydrogen phosphate by raw materials, namely the ox bones in a gelatin production process, and mainly comprises the following steps: (1) processing calcium water of the ox bones, subjected to demineralization, through a coagulation and flocculation device; (2) filtering overflowed calcium water through a filtering groove; (3) aerating and micro-filtering the filtered calcium water; (4) preprocessing unslaked lime; (5) neutralizing; (6) neutralizing for generating calcium hydrogen phosphate sediments, standing, adsorbing the calcium water on an upper layer, and adding a stabilizer by stirring for treatment; (7) filtering the sediments treated with the stabilizer, washing, carrying out spin-drying through a centrifugal machine, and carrying out airflow drying to obtain finished toothpaste grade calcium hydrogen phosphate. According to the process, the shortcomings of high fluorine, arsenic and lead content and the like are overcome, the pollution of a production process on an environment is low, and the comprehensive cost is low.

Description

technical field [0001] The invention relates to a process for preparing toothpaste-grade calcium hydrogen phosphate from bovine bones, which belongs to the fields of biochemistry and microorganisms, in particular to a process for preparing toothpaste-grade calcium hydrogen phosphate from bovine bones. Background technique [0002] Toothpaste grade calcium hydrogen phosphate is an internationally recognized high-quality friction agent. Compared with ordinary toothpaste abrasives-calcium carbonate, it has moderate friction value, low corrosion coefficient, no damage to tooth enamel, good compatibility with drugs, and has a relatively good effect on other ingredients. Good adsorption and other advantages. At present, developed countries have banned the use of calcium carbonate as a toothpaste abrasive, so the demand for toothpaste-grade calcium hydrogen phosphate in the international market is increasing day by day, and now the main manufacturers of toothpaste in China are also...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/32
Inventor 杨瑞婷钟伟王富荣
Owner BAOTOU DONGBAO BIO TECH CO LTD
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