CN110615434B - Method for preparing artificial diamond by using bone ash and product thereof - Google Patents

Method for preparing artificial diamond by using bone ash and product thereof Download PDF

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CN110615434B
CN110615434B CN201911040782.0A CN201911040782A CN110615434B CN 110615434 B CN110615434 B CN 110615434B CN 201911040782 A CN201911040782 A CN 201911040782A CN 110615434 B CN110615434 B CN 110615434B
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bone ash
temperature
pressure
acid solution
deposition chamber
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CN110615434A (en
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钟柳
钟佳俊
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Jiangxi Hui Shan Crafts Co ltd
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    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00Carbon; Compounds thereof
    • C01B32/25Diamond
    • C01B32/26Preparation

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Abstract

The invention discloses a method for preparing artificial diamond by using bone ash and a product thereof, wherein the preparation steps are as follows: (1) Sieving the bone ash with a 500-mesh sieve, grinding the bone ash on the sieve until the particle size is less than 50 mu m; (2) acid treatment: pouring acid solution into the bone ash until the pH value is 3.3-3.4, stirring and soaking for 3-6h; (3) heating the acid solution and blowing gas into the acid solution; (4) Collecting gas overflowing from the acid solution, introducing the gas into a vacuum vapor deposition chamber, arranging a silicon substrate at the bottom of the deposition chamber, introducing hydrogen into the deposition chamber, discharging by microwave plasma, wherein the pressure of the deposition chamber is 1-10 kPa, the temperature is 800-1100 ℃, and the time is 15-20min; (5) obtaining the carbon-containing material deposited on the silicon base, and crushing; and injecting the crushed carbon-containing material into a high-pressure reaction chamber, and preparing the artificial diamond under high temperature and high pressure. The obtained product has good hardness, good glossiness, good appearance, and long shelf life.

Description

Method for preparing artificial diamond by using bone ash and product thereof
Technical Field
The invention relates to a process for extracting raw carbon of organism diamond and a product thereof, in particular to a process for extracting carbon by taking bone ash as a raw material to prepare organism diamond.
Background
A new funeral and interment law is issued in 2016, people in the country in China must be cremated after death in a legal form, traditional burial is not allowed any more, and in recent years, along with the change of cognition, the mode of cremating remains and storing bone ash is gradually accepted by the masses. Therefore, people in the country face the problem of how to store and store the bone ash of ancestors and relatives for a long time. At present, the state also advocates new green funeral and interment modes actively, such as: sea burial, tree burial and other methods are used for solving the problem of bone ash placement, but the methods are not accepted by people at present and cannot express thoughts and memory of relatives. The bone ash is processed into precious stones, and the precious stones are made into various collectibles, souvenirs and artware, such as rings, bracelets, pendant, bracelet, chains, statues and ornaments in various shapes, and the precious stones are made from one part of the human body, so the precious stones have unique commemorative value and unique significance.
At present, diamond has the excellent performances of maximum hardness, maximum thermal conductivity, minimum compressibility, widest light-transmitting wave band, fastest sound velocity, large carrier mobility and the like, and is widely applied to the fields of industry, science and technology, national defense, medical treatment and the like. Meanwhile, the diamond is a symbol of wealth and glowing due to the hard, rare and uniform bright visual effect, and various ornaments made of the diamond are deeply loved by people. However, because of the scarcity of natural diamonds, the demand of people for diamonds cannot be met, and artificial diamonds are produced. The artificial diamond is generally made of graphite, so that the carbon-containing substance can be made into diamond. All organisms in the world are rich in carbon elements, and the carbon element content in the human and all animal bodies is about 18%. All other 'living' substances also contain a certain amount of carbon, for example, the main component of plant chlorophyll is carbon, the main component of tree trunks is carbon, energy sources for maintaining human life, namely sugar, fat and grease, are composed of three elements of carbon, hydrogen and oxygen, and the main components of protein and vitamin are also carbon elements. Therefore, without carbon, life does not exist, so carbon is the source of life. The bone ash produced by cremation of human and animal remains contains rich carbon in addition to elements such as calcium, phosphorus and the like, and carbon-containing gas such as carbon dioxide or carbon monoxide and the like is generated by combustion in the cremation process. If the carbonaceous matter generated in the process of cremation of the remains of the human or animal is converted into the artificial diamond, various souvenirs such as diamond rings, necklaces, artworks and the like are made, which is the best souvenir for deceased relatives, deceased pets and the like.
Disclosure of Invention
The invention aims to provide a method for preparing artificial diamond by using bone ash and a product thereof, which are scientific, reasonable, simple and feasible, and the obtained product is hard, good in glossiness, attractive in appearance and long in storage time.
The invention relates to a method for preparing artificial diamond by using bone ash, which comprises the following steps:
(1) Sieving the bone ash with a 500-mesh sieve, and grinding the bone ash on the sieve until the particle size is less than 50 mu m;
(2) Acid treatment: pouring acid solution into the bone ash until the pH value is 3.3-3.4, stirring, and soaking for 3-6h;
(3) Heating the acid solution and bubbling a gas into the acid solution;
(4) Collecting gas overflowing from the acid solution, introducing into a vacuum vapor deposition chamber, arranging silicon substrate at the bottom of the deposition chamber, introducing hydrogen into the deposition chamber, discharging by microwave plasma, wherein the pressure of the deposition chamber is 1-10 kPa, the temperature is 800-1100 ℃, and the time is 15-20min;
(5) Obtaining a carbon-containing material deposited on the silicon substrate, and crushing; and injecting the crushed carbon-containing material into a high-pressure reaction chamber, and preparing the artificial diamond under high temperature and high pressure.
The screen mesh in the step (1) is arranged in a hearth of the bone ash pyrolysis furnace and is made of graphite.
And (3) the gas in the step (2) is collected in the cremation process.
And (3) the gas in the step (2) is carbon dioxide gas obtained through separation and chemical replacement.
And (5) heating and pressurizing step by step in the high-pressure reaction chamber, heating to 30-35MPa at a constant speed, heating to 600-800 ℃, keeping for 5-10min, continuously pressurizing to 100-110MPa, heating to 1500-1700 ℃ at a constant speed, preserving heat for 12-15h, cooling to 600-800 ℃, releasing pressure, and continuously cooling to normal temperature and normal pressure to obtain the artificial diamond.
An artificial diamond obtained by the above method.
Compared with the prior art, the invention has the following beneficial effects:
after the bone ash is changed into the artificial diamond and is stored in a home, a cemetery does not need to be purchased any more, the county management fee of endless cemetery does not need to be paid, and the bone ash can be stored in the home as a biographical treasure, so that the land is saved for the country, the activity of people on the deceased can be kept, the country is benefited, and in addition, the discomfort brought by directly storing the cinerary casket in the home is solved.
The invention is scientific and reasonable, is suitable for popularization, has simple process and excellent product quality. The invention can obtain the bone ash part of the elapsed relatives or pets which people hope to store more by collecting the bone ash on the screen and crushing the bone ash. Blowing the acid-containing solution by using carbon dioxide gas collected in the cremation process, and allowing carbon-containing gas in the acid-containing solution and the carbon dioxide gas to enter a vapor deposition chamber together for deposition to obtain a carbon material containing diamond and graphite; the artificial diamond is prepared by heating and pressurizing step by step after crushing, two different processes are combined, and the energy consumption of the process conditions is greatly reduced.
When the carbon-containing material is used for preparing the diamond, the invention adopts heating and pressurizing step by step, and strictly controls the pressurizing and heating time and the temperature range, so that the pressure control of the process is more accurate, and the seed crystal is ensured to grow up quickly and continuously.
Detailed Description
The present invention is further described below with reference to examples.
Example 1
(1) Sieving the bone ash with a 500-mesh sieve, grinding the bone ash on the sieve until the particle size is 30 mu m;
(2) Acid treatment: pouring acid solution into the bone ash until the pH value is 3.3, stirring and soaking for 4 hours;
(3) Heating the acid solution, and blowing carbon dioxide gas collected and purified during cremation into the acid solution;
(4) Collecting gas overflowing from the acid solution, introducing the gas into a vacuum vapor deposition chamber, arranging a silicon substrate at the bottom of the deposition chamber, introducing hydrogen into the deposition chamber, discharging by microwave plasma, wherein the pressure of the deposition chamber is 3kPa, the temperature is 1100 ℃, and the time is 15min;
(5) Obtaining a carbon-containing material deposited on the silicon substrate, and crushing; injecting the crushed carbon-containing material into a high-pressure reaction chamber, pressurizing to 30MPa, heating to 800 ℃ at a constant speed, keeping for 6min, continuously pressurizing to 100MPa, heating to 1700 ℃ at a constant speed, preserving heat for 12h, then cooling to 600 ℃, starting pressure relief, simultaneously continuously cooling to normal temperature and normal pressure, and thus obtaining the artificial diamond.
Example 2
(1) Sieving the bone ash with a 500-mesh sieve, grinding the bone ash on the sieve until the particle size is 10 mu m;
(2) Acid treatment: pouring acid solution into the bone ash until the pH value is 3.4, stirring and soaking for 6 hours;
(3) Heating the acid solution, and blowing carbon dioxide gas collected and purified during cremation into the acid solution;
(4) Collecting gas overflowing from the acid solution, introducing the gas into a vacuum vapor deposition chamber, arranging a silicon substrate at the bottom of the deposition chamber, introducing hydrogen into the deposition chamber, discharging by microwave plasma, and allowing the pressure of the deposition chamber to be 10kPa, the temperature to be 800 ℃ and the time to be 20min;
(5) Obtaining a carbon-containing material deposited on the silicon substrate, and crushing; injecting the crushed carbon-containing material into a high-pressure reaction chamber, pressurizing to 35MPa, heating to 600 ℃ at a constant speed, keeping for 10min, continuously pressurizing to 110MPa, heating to 1500 ℃ at a constant speed, preserving heat for 15h, then cooling to 800 ℃, starting pressure relief, simultaneously continuously cooling to normal temperature and normal pressure, and thus obtaining the artificial diamond.
Example 3
(1) Sieving the bone ash with a 500-mesh sieve, grinding the bone ash on the sieve until the particle size is 45 mu m;
(2) Acid treatment: pouring acid solution into the bone ash until the pH value is 3.4, stirring and soaking for 3 hours;
(3) Heating the acid solution, and blowing carbon dioxide gas collected and purified during cremation into the acid solution;
(4) Collecting gas overflowing from the acid solution, introducing the gas into a vacuum vapor deposition chamber, arranging a silicon substrate at the bottom of the deposition chamber, introducing hydrogen into the deposition chamber, discharging microwave plasma, and allowing the pressure of the deposition chamber to be 5kPa, the temperature to be 1000 ℃ and the time to be 18min;
(5) Obtaining a carbon-containing material deposited on the silicon substrate, and crushing; injecting the crushed carbon-containing material into a high-pressure reaction chamber, pressurizing to 35MPa, heating to 700 ℃ at a constant speed, keeping for 8min, continuously pressurizing to 110MPa, heating to 1600 ℃ at a constant speed, preserving heat for 13h, then cooling to 700 ℃, starting pressure relief, simultaneously continuously cooling to normal temperature and normal pressure, and thus obtaining the artificial diamond.
Example 4
(1) Sieving the bone ash with a 500-mesh sieve, grinding the bone ash on the sieve until the particle size is 2 mu m;
(2) Acid treatment: pouring acid solution into the bone ash until the pH value is 3.4, stirring and soaking for 5 hours;
(3) Heating the acid solution, and blowing carbon dioxide gas collected and purified during cremation into the acid solution;
(4) Collecting gas overflowing from the acid solution, introducing the gas into a vacuum vapor deposition chamber, arranging a silicon substrate at the bottom of the deposition chamber, introducing hydrogen into the deposition chamber, discharging by microwave plasma, wherein the pressure of the deposition chamber is 1kPa, the temperature is 1100 ℃, and the time is 20min;
(5) Obtaining a carbon-containing material deposited on the silicon substrate; injecting a carbon-containing material into a high-pressure reaction chamber, pressurizing to 34MPa, heating to 800 ℃ at a constant speed, keeping for 10min, continuously pressurizing to 110MPa, heating to 1500 ℃ at a constant speed, keeping for 12h, cooling to 600 ℃, releasing pressure, and continuously cooling to normal temperature and normal pressure to obtain the artificial diamond.
TABLE 1 Artificial Diamond parameters
Refractive index Dispersion (S) of a light beam Gloss index Mohs hardness Toughness of
Example 1 2.25 0.055 17.6% 9.20 Good taste
Example 2 2.33 0.050 18.6% 9.15 Good taste
Example 3 2.21 0.056 17.4% 8.97 Good taste
Example 4 2.30 0.058 18.3% 9.14 Good taste
In summary, the present invention provides a method and product for preparing artificial diamond by using bone ash, which can improve the traditional bone ash cremation preservation method, save a large amount of storage space, reduce the requirement for funeral land to maintain the environmental quality, and can be mass-produced by the method, which is easy to process and form, and can effectively reduce the production cost, and can make the bone ash of relatives and friends or pets reach the permanent preservation utilization value, thereby making the production of the invention more advanced, more practical and more in line with the needs of users.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention; all simple and equivalent changes and modifications made according to the claims and the contents of the specification of the present invention should be covered by the scope of the present invention.

Claims (5)

1. A method for preparing artificial diamond by using bone ash comprises the following steps:
(1) Sieving the bone ash with a 500-mesh sieve, and grinding the bone ash on the sieve until the particle size is less than 50 mu m;
(2) Acid treatment: pouring acid solution into the bone ash until the pH value is 3.3-3.4, stirring, and soaking for 3-6h;
(3) Heating the acid solution and bubbling a gas into the acid solution;
(4) Collecting carbon-containing gas overflowing from the acid solution, introducing the carbon-containing gas into a vacuum vapor deposition chamber, arranging a silicon substrate at the bottom of the deposition chamber, introducing hydrogen into the deposition chamber, discharging by microwave plasma, and allowing the pressure of the deposition chamber to be 1-10 kPa, the temperature to be 800-1100 ℃ and the time to be 15-20min;
(5) Obtaining a carbon-containing material deposited on the silicon substrate, and crushing; injecting the crushed carbon-containing material into a high-pressure reaction chamber, and preparing the artificial diamond under high temperature and high pressure;
the high-pressure reaction chamber is heated and pressurized step by step, the pressure is firstly increased to 30-35MPa, then the temperature is increased to 600-800 ℃ at a constant speed, the temperature is kept for 5-10min, the pressure is continuously increased to 100-110MPa, the temperature is increased to 1500-1700 ℃ at a constant speed, the temperature is kept for 12-15h, then the temperature is reduced, the pressure is released after the temperature is reduced to 600-800 ℃, and the temperature is continuously reduced to normal temperature and normal pressure.
2. The method according to claim 1, wherein the screen of step (1) is made of graphite and is disposed in the hearth of the bone ash pyrolysis furnace.
3. The method of claim 1, wherein the gas of step (3) is a gas collected during the cremation process.
4. The method according to claim 3, wherein the gas is carbon dioxide gas obtained by separation and chemical replacement.
5. An artificial diamond obtained by the method of any one of claims 1 to 4.
CN201911040782.0A 2019-10-30 2019-10-30 Method for preparing artificial diamond by using bone ash and product thereof Active CN110615434B (en)

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CN113247892A (en) * 2021-06-07 2021-08-13 杭州宝照晶体技术有限公司 Method for preparing artificial diamond and crystal from mineral, bone ash and recycled material
CN113754423B (en) * 2021-09-09 2022-12-30 喵石科技(宁波)有限公司 Gem-like crystal based on animal skeleton bone and preparation method thereof
CN115849343A (en) * 2022-12-22 2023-03-28 富耐克超硬材料股份有限公司 Biological carbon powder, extraction method of biological carbon powder and preparation method of diamond

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