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A graphite purification and graphite technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve environmental hazards, environmental pollution and other problems, and achieve the effects of small environmental pollution, shortened time, and convenient operation
Inactive Publication Date: 2018-11-06
山东领军科技集团有限公司
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High-purity graphite has played a supporting role in modern human science and technology and the national defense industry. High-purity graphite is required as a processing raw material for industrial production in the fields of nuclear industry, high-energy batteries, and electrodes. Graphite deep-processing enterprises continue to increase. At the same time, the problem of environmental pollution is becoming more and more serious. The existing graphite purification process often uses hydrofluoric acid method, so a large amount of fluorine-containing wastewater will be generated, and excessive fluorine-containing wastewater will be discharged into the water body, which will cause harm to the environment.
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Embodiment 1
[0019] A kind of graphite purification method comprises the following steps:
[0020] 1) Preparation of raw materials:
[0021] 1. raw material preparation: prepare 100 parts of graphite, 40 parts of sodium hydroxide, a sufficient amount of deionized water, and 40 parts of hydrochloric acid with a concentration of 1mol / L by weight;
[0022] ②Equipment and tooling preparation: crucible, box-type resistance furnace, magnetic stirrer, vacuum drying oven;
[0023] 2) The purification process is as follows:
[0024] ①Put the graphite and sodium hydroxide prepared in stage 1) step ① into the crucible together, and add 100 parts of deionized water into the crucible, and stir evenly with a glass rod;
[0025] ②Put the crucible prepared in stage 1) step ① into the box-type resistance furnace, keep the heating rate at 10°C / min, until the temperature in the box-type resistance furnace reaches 600°C, keep it warm for 2 hours, and then let the box-type resistance furnace naturally Cooli...
Embodiment 2
[0028] A graphite purification method, comprising the following steps:
[0029] 1) Preparation of raw materials:
[0030] 1. raw material preparation: prepare 200 parts of graphite, 80 parts of sodium hydroxide, sufficient amount of deionized water, and 80 parts of hydrochloric acid with a concentration of 1mol / L by weight;
[0031] ②Equipment and tooling preparation: crucible, box-type resistance furnace, magnetic stirrer, vacuum drying oven;
[0032] 2) The purification process is as follows:
[0033] ①Put the graphite and sodium hydroxide prepared in stage 1) step ① into the crucible together, and add 150 parts of deionized water into the crucible, and stir evenly with a glass rod;
[0034] ②Put the crucible prepared in stage 1) step ① into the box-type resistance furnace, keep the heating rate at 10°C / min, until the temperature in the box-type resistance furnace reaches 800°C, keep it for 4 hours, and then let the box-type resistance furnace naturally Cooling, take out ...
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Abstract
The invention discloses a graphite purifying method. The graphite purifying method comprises the following steps that graphite and sodium hydroxide are placed into a crucible together, deionized wateris added and stirred to be uniform by using a glass rod; and the crucible is placed in a chamber electric resistance furnace to be roasted, after the crucible is naturally cooled, the graphite in thecrucible is poured into a beaker, the deionized water is added to wash the graphite, till the graphite is neutral, hydrochloric acid is added to react for a period of time, then the deionized water is utilized for washing the graphite to be neutral, and the purified graphite can be obtained after complete drying is conducted. The graphite purifying method firstly adopts sodium hydroxide to be subjected to a chemical reaction with graphite under the heating condition, the impurities such as silicate and aluminosilicate in the graphite are removed, a compound being water soluble is generated, and impurities in the graphite are removed after the compound is washed. Hydrochloric acid is utilized to remove basic oxide impurities in the graphite, the method is simple, and convenient to operate,the graphite purifying and production efficiency is high, the requirement to the equipment is low, the pollution to the environment is less, and the graphite purifying method has the extremely high practical popularization value.
Description
technical field [0001] The invention relates to the technical field of graphite chemical industry, in particular to a graphite purification method. Background technique [0002] Graphite is known as "black gold" and is an important strategic resource. It has very important value in the development of national economy and modernization. At present, my country's research on graphite can only meet the needs of the electronics industry and light industry, and most of them focus on processing, mining and selection processes. The technology is not advanced enough, and the needs of cutting-edge technology industries and national defense still rely on large quantities of foreign imports. The purity of graphite produced in my country is often low, which is a cheap primary product with low economic added value and lack of market competitiveness. However, the imported high-purity graphite is expensive, and the annual trade deficit caused by this is as high as hundreds of millions of yu...
Claims
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