Production method for cultivating high-quality diamond by using hair

Abstract

The invention relates to the technical field of diamonds, in particular to a production method for cultivating high-quality diamonds by using hair, which comprises the following steps: step 1, hair pretreatment: cleaning and crushing the collected hair; 2, carbon extraction and purification; step 3, diamond synthesis; according to the production method for cultivating the high-quality diamond through the hair, the diamond is cultivated through the hair, a brand-new diamond source approach is developed, the hair serves as a renewable resource, is wide in source and can be obtained in a large number, sustainable utilization of the resource is facilitated, meanwhile, in the production process, the design of all links is reasonable, and the production cost is low. According to the method, the conversion from the hair to the diamond can be efficiently and stably carried out, for example, in the carbon extraction and purification stage, the quality of subsequent diamond synthesis is effectively improved by accurately controlling pyrolysis conditions and an effective purification means, and the economic consumption of diamond production is also reduced, so that the diamond production benefit is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of diamonds, in particular to a production method for cultivating high-quality diamonds using hair. Background Art

[0002] Traditional diamonds are usually obtained through natural mining or artificial synthesis. However, the formation of natural diamonds requires specific geological conditions and a long time, the resources are scarce and the mining process has a great impact on the environment. Although artificial synthetic diamonds have alleviated the resource problem to a certain extent, the production process is complicated and the cost is high.

[0003] Artificial diamonds, also known as cultured diamonds, are polycrystalline diamonds formed by the aggregation of diamond crystals with a diameter of 10 to 30 nanometers. Cultured diamonds have the same physical and chemical properties as natural diamonds, but their price is only about one-third of that of natural diamonds. With the maturity of artificial diamond production technology, their cost is low and they can produce diamonds of various colors, making them emerging in the jewelry market. Among them, hair diamonds are synthetic diamonds that use biological hair as a carbon source, and are a type of gem-grade biological carbon source synthetic diamonds.

[0004] However, the existing hair diamond production methods have many shortcomings. In the hair raw material processing stage, the removal of impurities in the hair is not thorough enough. For example, some chemical residues and tiny dust particles attached to the hair are difficult to completely clean, which may introduce impurities in the subsequent carbon extraction and diamond cultivation process, affecting the purity and quality of the diamonds. On the other hand, in the carbon extraction process, the technical means used are often inefficient and cannot fully and accurately extract the carbon element in the hair in a suitable state, resulting in insufficient effective carbon sources that can be used to cultivate diamonds, which in turn affects the output of diamonds, reduces the quality of diamond production, and causes a large amount of economic consumption.

[0005] In view of this, there is an urgent need for a production method using hair to grow high-quality diamonds to meet the needs of environmental protection, sustainable utilization of resources, and efficient and stable production of high-quality diamonds, and to improve the shortcomings of existing technologies. Summary of the invention

[0006] The object of the present invention is to provide a production method for cultivating high-quality diamonds using hair to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides a method for growing high-quality diamonds using hair, comprising the following steps:

[0008] S1. Hair pretreatment: washing and crushing the collected hair;

[0009] S2. Carbon extraction and purification: The carbon element is extracted from the hair by high temperature pyrolysis and purified by chemical washing or physical adsorption, wherein:

[0010] Chemical washing requires the use of chemical reagents to soak and wash the carbon obtained from pyrolysis to remove impurities and other residual elements;

[0011] Physical adsorption uses adsorbents to adsorb and filter carbon, further removing tiny impurities and improving the purity of carbon;

[0012] S3, diamond synthesis: the purified carbon powder is synthesized by adding a catalyst under high pressure and high temperature conditions;

[0013] S4. Diamond processing and post-processing: Processing, cleaning and quality inspection of synthetic diamond roughs.

[0014] As a further improvement of the technical solution, in S1, the hair pretreatment comprises the following steps:

[0015] S1.1. The hair comes from human hair and pet hair, and the hair is collected;

[0016] S1.2. Rinse the hair with detergent and water;

[0017] S1.3, drying the washed hair;

[0018] S1.4. Put the dried hair into a grinder and grind it into powder.

[0019] As a further improvement of the present technical solution, in S1.2, the number of times of hair washing is 6 to 10 times.

[0020] As a further improvement of the technical solution, in S1.4, the hair becomes powder and is controlled to be in the range of 200-400 meshes.

[0021] As a further improvement of the present technical solution, in S2, the high-temperature pyrolysis method requires placing the crushed hair in a pyrolysis furnace and performing high-temperature pyrolysis in an inert gas environment; the pyrolysis temperature is controlled at 500°C-1000°C, and the pyrolysis time is controlled at 2h-8h.

[0022] As a further improvement of the present technical solution, in S2, the chemical reagent can be one of dilute hydrochloric acid and sodium hydroxide solution. When using dilute hydrochloric acid for soaking and washing, the soaking and washing is 2 to 5 times, each time for 1 hour. When using sodium hydroxide solution for washing, the soaking and washing is 1 to 3 times, and then washed with clean water 3 to 10 times.

[0023] As a further improvement of the technical solution, in S3, the amount of the catalyst is 0.1%-1% of the mass of the carbon powder.

[0024] As a further improvement of the present technical solution, in S3, diamond synthesis includes placing carbon powder and a catalyst into a high-pressure and high-temperature synthesis device, the pressure is controlled at 5GPa-10GPa, the temperature is controlled at 1200℃-2000℃, the crystal structure of carbon undergoes a transformation, and diamond crystals are gradually formed, and the synthesis time is 8d-16d.

[0025] As a further improvement of the technical solution, in S4, the diamond rough processing includes taking out the synthesized diamond rough from the synthesis device and processing it using diamond cutting and polishing technology.

[0026] As a further improvement of the technical solution, in S4, the cleaning of synthetic diamonds uses a cleaning agent to clean the processed diamonds; the quality inspection of synthetic diamonds uses inspection equipment and technology to inspect the hardness, refractive index and purity of diamonds.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] In the production method of using hair to cultivate high-quality diamonds, a new source of diamonds is opened up by using hair to cultivate diamonds. In addition, hair, as a renewable resource, is widely available and can be obtained in large quantities, which is conducive to the sustainable use of resources. At the same time, in the production process, the design of each link is relatively reasonable, so that the conversion from hair to diamond can be carried out efficiently and stably. For example, in the carbon extraction and purification stage, the quality of subsequent diamond synthesis is effectively improved by precisely controlling the pyrolysis conditions and effective purification methods, and the economic consumption of diamond production is reduced, thereby improving the efficiency of diamond production. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a flowchart of the production method of using hair to grow high-quality diamonds according to the present invention;

[0030] Figure 2 The bar graph is a bar graph for testing purity, crystallization rate, stability and physicochemical properties of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0032] according to Figure 1As shown, the embodiment of the present invention provides a production method of cultivating high-quality diamonds using hair, comprising the following steps:

[0033] Step 1: Hair pretreatment: washing and crushing the collected hair; wherein the hair pretreatment includes the following steps:

[0034] (1) The hair comes from human hair and pet hair. The hair comes from a wide range of sources, including human hair, pet hair, etc. The cost is relatively low, and the hair is collected;

[0035] (2) Rinse the hair with detergent and clean water to thoroughly remove dirt, grease, dust and possible chemical residues and other impurities on the surface. Rinse the hair 6 to 10 times;

[0036] (3) Dry the cleaned hair to ensure that it is dry and free of water stains;

[0037] (4) putting the dried hair into a grinder for grinding to make it into powder, and the hair powder is controlled to be 200-400 mesh;

[0038] Step 2, carbon extraction and purification: The carbon element is extracted from the hair by high-temperature pyrolysis. The high-temperature pyrolysis method requires that the crushed hair is placed in a pyrolysis furnace and pyrolyzed at high temperature in an inert gas environment (such as nitrogen, argon, etc.); the pyrolysis temperature is controlled at 500°C-1000°C, and the pyrolysis time is controlled at 2h-8h. In this process, the organic matter in the hair is decomposed by heat, and the carbon element is extracted; and a purification treatment is performed; the purification treatment includes one of chemical washing and physical adsorption, wherein:

[0039] Chemical washing requires the use of chemical reagents to soak and wash the carbon obtained by pyrolysis to remove impurities and other residual elements. The chemical reagent can be one of dilute hydrochloric acid and sodium hydroxide solution. When using dilute hydrochloric acid for soaking and washing, soak and wash 2 to 5 times, each time for 1 hour. When using sodium hydroxide solution for washing, soak and wash 1 to 3 times, and then wash with clean water 3 to 10 times;

[0040] The carbon is adsorbed and filtered by an adsorbent to further remove tiny impurities and improve the purity of the carbon;

[0041] Step 3, diamond synthesis: add a catalyst to the purified carbon powder under high pressure and high temperature conditions for synthesis; the amount of the catalyst is 0.1%-1% of the mass of the carbon powder, and the catalyst can be iron, nickel and other metal powders. Diamond synthesis includes putting the carbon powder and the catalyst into a high pressure and high temperature synthesis device, the pressure is controlled at 5GPa-10GPa, the temperature is controlled at 1200℃-2000℃, the crystal structure of the carbon changes, and diamond crystals are gradually formed. The synthesis time is 8d-16d;

[0042] Step 4: Diamond processing and post-processing: Processing, cleaning and quality inspection of synthetic diamond roughs; Diamond rough processing includes taking the synthetic diamond roughs out of the synthesis device, processing them using diamond cutting and polishing techniques, and processing them into finished diamonds with a certain shape (such as round, square, etc.) and gloss according to the purpose and design requirements of the diamonds; Cleaning of synthetic diamonds, using cleaning agents to clean the processed diamonds, remove impurities and processing marks remaining on the surface of the diamonds, and improve the transparency and gloss of the diamonds; Quality inspection of synthetic diamonds, using testing equipment and technology to test the hardness, refractive index and purity of diamonds.

[0043] In the invention, the hair is firstly subjected to comprehensive pretreatment, including understanding the source of the hair and collecting it, washing it with detergent and water for multiple times to remove various impurities, and crushing it into powder with a specific mesh size after drying; this can not only provide pure raw materials with appropriate particle size for subsequent carbon extraction, ensuring the high efficiency and stability of carbon element extraction, but also, in the carbon extraction and purification steps, through high-temperature pyrolysis, chemical washing, physical adsorption and other purification treatments, impurities can be effectively removed to obtain high-purity carbon powder; such as using high-temperature pyrolysis to decompose organic matter in hair to extract carbon elements, using chemical reagents for immersion washing and activated carbon adsorption to filter impurities, it can also effectively improve the quality and success rate of diamond synthesis.

[0044] Moreover, in the high-temperature pyrolysis stage, organic substances such as keratin in hair undergo thermal decomposition reactions under high temperature (500℃-1000℃) and inert gas environment, the chemical bonds of organic macromolecules break, and the decomposition produces carbon elements and other small molecular gaseous substances escape. The reaction mechanism is a heat-driven chemical bond breaking and recombination process, which converts the complex organic structure into a carbon-based substance. In the diamond synthesis stage, under the action of high pressure (5GPa-10GPa), high temperature (1200℃-2000℃) and catalysts (metal powders such as iron and nickel), the carbon atoms in the carbon powder undergo structural rearrangement, gradually transforming from disordered or other crystal structures to the crystal structure of diamond. This is a complex physical and chemical process. The catalyst plays a role in reducing the activation energy of the reaction and promoting the orderly arrangement and crystallization of carbon atoms. The specific reaction path involves a multi-step process of diffusion of carbon atoms under high temperature and pressure, adsorption on the catalyst surface, and nucleation and crystal growth at the active sites of the catalyst.

[0045] By using hair to cultivate diamonds, a new source of diamonds has been opened up. In addition, hair is a renewable resource with a wide range of sources and can be obtained in large quantities, which is conducive to the sustainable use of resources. At the same time, in the production process, the design of each link is relatively reasonable, so that the conversion from hair to diamond can be carried out efficiently and stably. For example, in the carbon extraction and purification stage, by precisely controlling the pyrolysis conditions and effective purification methods, the quality of subsequent diamond synthesis is effectively improved, and the economic consumption of diamond production is reduced, thereby improving the efficiency of diamond production.

[0046] According to different raw material dosages, the present invention is further described through the following specific embodiments for using hair to grow high-quality diamonds.

[0047] Embodiment 1:

[0048] 80 g of human hair was collected, washed, dried, and crushed to 300 mesh;

[0049] In a nitrogen environment, the carbon was pyrolyzed at 700 °C for 5 h, and the pyrolyzed carbon was washed with dilute hydrochloric acid for 3 times, each time for 1 h, and then filtered with activated carbon for adsorption;

[0050] The purified carbon powder was mixed with 0.4 g of iron powder and placed in a synthesis device. The pressure was set to 9 GPa and the temperature was set to 1800 °C for 12 days.

[0051] After cutting and polishing, a 0.15g oval diamond was obtained.

[0052] Embodiment 2:

[0053] Collect 60g of pet hair, wash, dry and crush to 250 mesh;

[0054] Pyrolyze at 900 °C for 3 h in argon, wash the carbon powder twice with sodium hydroxide solution, rinse with water five times, and filter by activated carbon adsorption;

[0055] Mixed with 0.2g nickel powder, synthesized at 6GPa and 1500℃ for 14d;

[0056] 0.12 g of pear-shaped diamond was obtained.

[0057] Embodiment 3:

[0058] Collect 120g of human hair and pet hair (1:1), wash, dry and crush to 400 mesh;

[0059] Pyrolysis at 600℃ for 7h under nitrogen, soaking and washing with dilute hydrochloric acid for 4 times, and adsorption on activated carbon;

[0060] Add 0.6g iron powder, pressure 7GPa, temperature 1300℃, synthesize for 16d;

[0061] Made into a 0.25g heart-shaped diamond.

[0062] In order to verify that the high-quality diamond grown from hair prepared in the embodiment of the present invention has good purity and stability, the high-quality diamond grown from hair provided in the embodiment of the present invention is described through the following test examples.

[0063] Test example:

[0064] The purpose of this test group is to explore the effects of different ingredient ratios on hair-grown high-quality diamonds.

[0065] Test objective: To detect the purity, crystallization rate, stability and physical and chemical properties of the hair-grown high-quality diamonds of the present invention.

[0066] Test method: Test group A, test group B and test group C respectively use the composition ratios of hair-grown high-quality diamonds provided in Examples 1-3; the control example uses control group A, control group B and control group C, wherein:

[0067] Control group A:

[0068] 100 grams of human hair was collected, simply washed without thoroughly removing impurities, dried and crushed to 100 mesh; pyrolyzed at 800°C for 4 hours under nitrogen, and the carbon after pyrolysis was not chemically washed, only activated carbon was adsorbed and filtered; mixed with 0.5g of iron powder, synthesized at a pressure of 8GPa and a temperature of 1600°C for 10 days; the obtained diamonds were of poor quality, had more impurities, and had low transparency.

[0069] Control group B:

[0070] 50g of pet hair was collected, washed, dried and crushed to 200 mesh; pyrolyzed at 600℃ in argon for 6h, the carbon powder was washed once with sodium hydroxide solution but not rinsed thoroughly with water, and filtered by activated carbon adsorption; mixed with 0.3g of nickel powder, synthesized at a pressure of 7GPa and a temperature of 1800℃ for 15d; there were residual impurities inside the diamond, the color was yellowish and the clarity was low.

[0071] Control group C:

[0072] 80g of human hair was collected, washed, dried and crushed into 300 mesh; pyrolysis was carried out at 700℃ for 5h in a nitrogen environment, and the carbon powder after pyrolysis was soaked and washed with dilute hydrochloric acid for 3 times, each time for 1h, without adsorption and filtration with activated carbon; the purified carbon powder was mixed with 0.4g of iron powder and put into a synthesis device, the pressure was set to 9GPa, the temperature was 1800℃, and the synthesis was carried out for 12d; tiny impurity particles were attached to the surface of the diamond, and the glossiness was poor.

[0073] Specific detection indicators are shown in Table 1.

[0074] Table 1: Test indicators of each sample

[0075] purity(%) Crystallinity (%) stability(%) Physicochemical properties (%) Experimental Group A 95 88 93 91 Test Group B 90 86 87 88 Test Group C 94 85 90 90 Control group A 75 60 65 70 Control group B 78 64 68 73 Control group C 80 67 70 75

[0076] As shown in Table 1, the test groups A, B, and C (using the composition ratio of the embodiment of the present invention) are significantly superior to the control groups A, B, and C in terms of purity, crystallization rate, stability, and physicochemical properties.

[0077] In terms of purity, the test group generally reached 90% or above, while the control group was only 80% at most. The present invention effectively removes impurities and ensures the high purity of diamonds through more sophisticated hair pretreatment (thorough cleaning, appropriate mesh crushing), carbon extraction and purification (standardized pyrolysis, sufficient chemical washing and physical adsorption) and other steps.

[0078] In terms of crystallization rate, the test groups A, B, and C reached 88%, 86%, and 85%, respectively, while the control group was in the range of 60%-67%. The precise synthesis condition control of the present invention (appropriate pressure, temperature, catalyst dosage and synthesis time) promoted the orderly arrangement and crystallization of carbon atoms and improved the crystallization rate.

[0079] In terms of stability, the test group data was 87%-93%, while the control group data was only 65%-70%, indicating that the production process of the present invention can make the diamond crystal structure more stable, thanks to the strict parameter setting of each link to reduce crystal defects.

[0080] In terms of physical and chemical properties, the values ​​of the test group were 88%-91%, and those of the control group were 70%-75%. The comprehensive treatment process of the present invention makes the diamonds perform better in physical and chemical properties such as hardness and refractive index, and the overall quality is higher.

[0081] It can be seen that through the operation of the hair pretreatment stage, as well as the control of carbon extraction and purification, diamond synthesis and other links, the purity, crystallization rate, stability and physical and chemical properties of diamonds are far superior to the control group using traditional or imperfect processes; this not only improves the product quality of diamonds, making them more crystal clear and glossy in appearance, and the internal crystal structure more perfect and stable, but also effectively reduces production costs, reduces the waste of raw materials caused by impurities and repeated process adjustments, improves production efficiency, and thus increases the economic benefits of diamond production.

[0082] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for producing high-quality diamonds using hair, characterized in that: The following steps are involved: S1. Hair pretreatment: washing and crushing the collected hair, the hair including human hair, pet hair, or a mixture of human hair and pet hair; S2. Carbon extraction and purification: The carbon element is extracted from the hair by high temperature pyrolysis and purified by chemical washing or physical adsorption, wherein: Chemical washing requires the use of chemical reagents to soak and wash the carbon obtained from pyrolysis to remove impurities and other residual elements; Physical adsorption uses adsorbents to adsorb and filter carbon, further removing tiny impurities and improving the purity of carbon; S3, diamond synthesis: the purified carbon powder is synthesized by adding a catalyst under high pressure and high temperature conditions; S4. Diamond processing and post-processing: Processing, cleaning and quality inspection of synthetic diamond roughs.

2. The method for producing high-quality diamonds using hair according to claim 1, characterized in that: In S1, the hair pretreatment comprises the following steps: S1.

1. The hair comes from human hair and pet hair, and the hair is collected; S1.

2. Rinse the hair with detergent and water; S1.3, drying the washed hair; S1.

4. Put the dried hair into a grinder and grind it into powder.

3. The method for producing high-quality diamonds using hair according to claim 2, characterized in that: In said S1.2, the hair is rinsed 6 to 10 times.

4. The method for producing high-quality diamonds using hair according to claim 2, characterized in that: In the above S1.4, the hair is powdered and the size is controlled to be between 200 mesh and 400 mesh.

5. The method for producing high-quality diamonds using hair according to claim 1, characterized in that: In S2, the high-temperature pyrolysis method requires placing the crushed hair in a pyrolysis furnace and performing high-temperature pyrolysis in an inert gas environment; the pyrolysis temperature is controlled at 500°C-1000°C, and the pyrolysis time is controlled at 2h-8h.

6. The method for producing high-quality diamonds using hair according to claim 1, characterized in that: In S2, the chemical reagent can be one of dilute hydrochloric acid and sodium hydroxide solution. When dilute hydrochloric acid is used for immersion washing, the immersion washing is performed 2 to 5 times, each time for 1 hour. When sodium hydroxide solution is used for washing, the immersion washing is performed 1 to 3 times, and then cleaned with clean water 3 to 10 times.

7. The method for producing high-quality diamonds using hair according to claim 1, characterized in that: In the step S3, the amount of the catalyst used is 0.1% to 1% of the mass of the carbon powder.

8. The method for producing high-quality diamonds using hair according to claim 1, characterized in that: In S3, diamond synthesis includes placing carbon powder and a catalyst into a high-pressure and high-temperature synthesis device, with the pressure controlled at 5GPa-10GPa and the temperature controlled at 1200°C-2000°C. The crystal structure of carbon undergoes a transformation to gradually form diamond crystals, and the synthesis time is 8d-16d.

9. The method for producing high-quality diamonds using hair according to claim 1, characterized in that: In S4, the diamond rough processing includes taking out the synthesized diamond rough from the synthesis device and processing it using diamond cutting and polishing technology.

10. The method for producing high-quality diamonds using hair according to claim 1, characterized in that: In S4, the synthetic diamonds are cleaned by using a cleaning agent to clean the processed diamonds; the synthetic diamonds are quality tested by using testing equipment and technology to test the hardness, refractive index and purity of the diamonds.

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