Method for purifying diamond synthetic block

A purification method and diamond technology, which is applied in the field of purification of diamond synthetic block materials, can solve the problems of inability to disperse, slow reaction, and long time consumption, and achieve the effects of saving electric heating costs, improving efficiency, and reducing the amount of acid used

Inactive Publication Date: 2007-06-13
ZHENGZHOU ARTIFICIAL DIAMOND & PROD ENG TECH RES CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the synthetic process of synthetic diamond, sometimes there will be lumpy products tightly combined with diamond, metal and graphite, which are difficult to be cleaned by conventional acid treatment procedures and cannot be dispersed.
Traditional crafts use aqua regia or other strong acids to boil and soak repeatedly, even after more than ten times, it is difficult to handle thoroughly
The existing treatment process reacts slowly, takes a long time, and consumes a large amount of acid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1, put into 100 grams of diamond synthetic block material+20 grams of ammonium chloride+400mL water+180mL concentrated nitric acid in the 3000-5000ml glass beaker and mix, the reaction proceeds intensely, and the reaction time is 3 hours. The reaction product was rinsed with water, dried, sieved, and the weight of the sieve was weighed: 9 grams, and 91% of the material was scattered.

Embodiment 2

[0008] Embodiment 2, put 100 grams of diamond synthetic blocks + 40 grams of ammonium chloride + 200 mL of water + 200 mL of concentrated nitric acid in a 3000-5000 ml glass beaker and mix well, the reaction will proceed violently, add 200 ml of water to cool down the reaction speed, and the reaction will be slow , continue to heat, the temperature rises, and after part of the water evaporates, the reaction proceeds violently, indicating that the water should not be too much. After 3 hours, the reaction was still intense, and after washing with water, the blocks were all scattered.

Embodiment 3

[0009] Example 3: Put 100 grams of diamond synthetic block material + 30 grams of ammonium chloride + 200 mL of water + 180 mL of concentrated nitric acid in a 3000-5000 ml glass beaker and mix well, the reaction will proceed vigorously, the reaction time is 2.5 hours, and the reaction product is rinsed with water , dried, sieved, said the weight of the sieve: 10 grams, 90% of the material scattered.

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PUM

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Abstract

This invention relates to a purifying method for composing diamond blocks including: 1, mixing a mixture of amine salt solution and HNO3 with a diamond combined block, adding 20-40g NH4Cl, 100-200 ml HNO3 and 200-400 ml water reacting for 2-3 h, 2, post process including washing, filtration, baking, meshing and the residual blocks enter into re-purification.

Description

technical field [0001] The invention belongs to the technical field of diamond synthesis, and in particular relates to a method for purifying diamond synthesis blocks. Background technique [0002] During the synthetic process of synthetic diamond, sometimes there will be massive products of diamond, metal and graphite tightly combined, which are difficult to be cleaned by conventional acid treatment procedures and cannot be dispersed. Traditional crafts use aqua regia or other strong acids to boil and soak repeatedly for many times, and it is difficult to treat thoroughly even after more than ten times. The existing treatment process reacts slowly, takes a long time, and consumes a large amount of acid. Contents of the invention [0003] The object of the present invention is to provide a method for purifying diamond synthetic blocks with mild conditions and capable of quickly removing metals in the diamond synthetic blocks. [0004] For reaching above-mentioned method,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/06
Inventor 邵静茹赵清国张召
Owner ZHENGZHOU ARTIFICIAL DIAMOND & PROD ENG TECH RES CENT
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