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Hydroxyapatite and preparation method thereof

A technology of hydroxyapatite and biogas residue, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of high cost of raw materials, easy product agglomeration, and large consumption.

Pending Publication Date: 2022-01-07
深圳基荣新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process needs to consume a large amount of calcium oxide, phosphoric acid and ammonia water, the cost of raw materials is high, and the product is easy to agglomerate
[0005] On the other hand, one of the main treatment methods for organic waste such as kitchen waste is anaerobic fermentation. Although this process can produce a part of biogas as energy for subsequent use, it can only achieve a partial reduction of organic solid waste, and there will still be A large amount of biogas residue needs to be further processed
Due to the high moisture content and high salt content of biogas residues, current methods such as landfilling or incineration face many problems due to environmental risks or high energy consumption

Method used

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  • Hydroxyapatite and preparation method thereof
  • Hydroxyapatite and preparation method thereof
  • Hydroxyapatite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0064] Parallel example 1:

[0065] 1) Take every 1kg of biogas residue and add 1L of water, stir evenly, put it into a hydrothermal kettle, keep it warm at 160°C for 6 hours, after cooling, filter it with a 200-mesh filter sieve, and set it in a drying oven at 60°C to dry. After drying, the first product was obtained and set aside.

[0066] 2) The first product obtained after drying is placed in a calciner for calcination, the calcination temperature is set at 700° C., and the calcination treatment time is 2 hours, then the second product is obtained.

[0067] 3) Perform an X-ray diffraction test on the second product obtained in Parallel Example 1, and compare its characteristic peaks with those of hydroxyapatite, so as to determine whether the second product is hydroxyapatite.

[0068] 4) Using an electronic scale, the mass of the second product obtained in Parallel Example 1 was taken as 18 g, and a field emission scanning electron microscope was used to scan the image of...

Embodiment 1

[0079] 1) Add 3L of water to every 1kg of biogas residue, stir it evenly, put it into a hydrothermal kettle, keep it warm at 170°C for 6 hours, and after cooling, filter it with a 200-mesh filter sieve, and set it in a drying oven at 60°C for drying. After drying, the first product was obtained and set aside.

[0080] 2) The first product obtained after drying is placed in a calciner for calcination, the calcination temperature is set at 700° C., and the calcination treatment time is 2 hours, then the second product is obtained.

[0081] 3) Carry out an X-ray diffraction test on the second product calcined in Example 1, and compare its characteristic peaks with those of hydroxyapatite, so as to determine whether the second product is hydroxyapatite.

[0082] 4) By means of an electronic scale, the mass of the second product obtained in Example 1 is 18 g, and the images of each parallel example and example are scanned by a field emission scanning electron microscope.

[0083] ...

Embodiment 2

[0086] 1) Add 4.5L of water to every 1kg of biogas residue, stir evenly, put it into a hydrothermal kettle, keep it warm at 160°C for 6h, after cooling, filter it with a 200-mesh filter sieve, and dry it in a drying oven at 60°C. The first product is obtained after drying, and is set aside.

[0087] 2) The first product obtained after drying is placed in a calciner for calcination, the calcination temperature is set at 800° C., and the calcination treatment time is 2 hours, then the second product is obtained.

[0088] 3) Carry out an X-ray diffraction test on the second product calcined in Example 2, and compare its characteristic peaks with those of hydroxyapatite, so as to determine whether the second product is hydroxyapatite.

[0089] 4) By means of an electronic balance, the mass of the second product obtained in Example 2 is taken as 18 g, and a field emission scanning electron microscope is used to scan an image of the second product obtained in Example 2.

[0090] 5)...

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Abstract

The invention provides hydroxyapatite and a preparation method thereof, and the method comprises the following steps: providing biogas residues, and in the presence of water, carrying out a hydrothermal reaction on the biogas residues to obtain hydroxyapatite. The biogas residues are solid wastes left after anaerobic fermentation of organic garbage substances, and the organic garbage substances are usually kitchen wastes, garden wastes, municipal sludge and other organic wastes. According to the method, the biogas residues left after biogas is generated through anaerobic fermentation of organic garbage substances are utilized, after water is added into the biogas residues, phosphate radicals and calcium ions in a solution can form substances such as calcium hydrogen phosphate under the hydrothermal condition, and the substances are further gradually converted, crystallized and grown into hydroxyapatite under the high-temperature calcination condition to form hydroxyapatite.

Description

technical field [0001] The application relates to the field of preparation of biological materials, in particular to a hydroxyapatite and a preparation method thereof. Background technique [0002] Hydroxyapatite, as a calcium phosphate salt with good biocompatibility and stability, has a wide range of applications in the fields of medical treatment, environmental restoration and governance. Its global market is showing a trend of continuous growth. The market size will exceed 800 million yuan in 2019. It is expected to reach about 1.15 billion yuan at an annual growth rate of 6.5% in the next five years, with huge room for growth. [0003] At present, it is mainly used for orthopedic and dental implants. With the continuous development of its application technology in the environmental field, especially in sewage treatment and soil remediation, its market will show a blowout growth. [0004] At present, the main preparation method of hydroxyapatite is co-precipitation meth...

Claims

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Application Information

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IPC IPC(8): C01B25/32
CPCC01B25/32C01P2002/72C01P2004/03
Inventor 詹志豪
Owner 深圳基荣新能源科技有限公司
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