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Method for purifying graphite by co-heating hexafluoromanganate and antimony pentafluoride generating fluorine gas

A technology of potassium hexafluoromanganate and antimony pentafluoride, applied in fluorine/hydrogen fluoride, chemical instruments and methods, fluorine, etc., can solve problems such as adverse effects, achieve high environmental performance, simple process, and optimized equipment structure

Inactive Publication Date: 2018-09-11
SINOSTEEL NEW MATERIAL ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies of the prior art, and to provide a method for purifying graphite by co-heating potassium hexafluoromanganate and antimony pentafluoride to produce fluorine gas, by adding chemical reactions in the graphite purification process, utilizing hexafluoromanganese Potassium and antimony pentafluoride co-heat to produce fluorine gas to replace the freon used in the purification process in the existing process, which ensures good purification effect and avoids the adverse impact on the environment during the use of freon

Method used

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  • Method for purifying graphite by co-heating hexafluoromanganate and antimony pentafluoride generating fluorine gas

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Embodiment 1

[0050] like figure 1 Shown, the method for the purification of graphite of potassium hexafluoromanganate and antimony pentafluoride co-heating produces fluorine gas, is characterized in that, comprises the following production steps:

[0051] (a) Vacuum part: vacuumize the fluorine gas reactor to remove the air in the reactor;

[0052](b) Feed reaction part: take antimony pentafluoride and potassium hexafluoromanganate at a mass ratio of 2 to 3:1, and add them to the reactor to react to generate fluorine gas, and the reaction temperature is 480 to 520°C;

[0053] (c) Graphitization / purification part: Arrange multiple groups of graphite products in the graphitization furnace according to the required spacing, fill in insulation material and resistance material in turn, and heat the graphitization furnace until the temperature of the furnace core is 1800 At ~1900°C, nitrogen gas is introduced to remove the air in the furnace core, and the heating rate is 10-30°C / min; when the g...

Embodiment 2

[0060] like figure 2 As shown, the system for co-heating potassium hexafluoromanganate and antimony pentafluoride to produce fluorine gas to purify graphite is characterized in that it includes a fluorine gas reaction unit I, and the fluorine gas reaction unit I includes:

[0061] Reactor 1 and a vacuum pump 2 for evacuating the inside of the reactor 1, a resistance heater 3 for heating the reactor 1 is installed on the outside of the reactor 1, and a thermocouple is arranged on the top of the reactor 1 5, the thermocouple 5 is used to monitor the heating temperature of the resistance heater 3; and

[0062] Furnace body unit II, the furnace body unit II includes:

[0063] Furnace body 9, furnace bottom material 91 is arranged at the bottom of said furnace body 9, graphite product is placed at furnace core 92, resistance material 93 is arranged around graphite product, heat insulating material 94 is arranged on the outside of resistance material 93, said One side of the furn...

Embodiment 3

[0070] like image 3 As shown, the system for co-heating potassium hexafluoromanganate and antimony pentafluoride to produce fluorine gas to purify graphite is characterized in that it includes a fluorine gas reaction unit I, and the fluorine gas reaction unit I includes:

[0071] Reactor 1 and a vacuum pump 2 for evacuating the inside of the reactor 1, a resistance heater 3 for heating the reactor 1 is installed on the outside of the reactor 1, and a thermocouple is arranged on the top of the reactor 1 5, the thermocouple 5 is used to monitor the heating temperature of the resistance heater 3; and

[0072] Furnace body unit II, the furnace body unit II includes:

[0073] Furnace body 9, furnace bottom material 91 is arranged at the bottom of said furnace body 9, graphite product is placed at furnace core 92, resistance material 93 is arranged around graphite product, heat insulating material 94 is arranged on the outside of resistance material 93, said One side of the furna...

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Abstract

The invention relates to a method for purifying graphite by co-heating hexafluoromanganate and antimony pentafluoride generating fluorine gas, which comprises the following steps of: vacuumizing a fluorine gas reactor, and removing air in the reactor; taking materials of antimony pentafluoride and hexafluoromanganate according to the mass ratio of 2-3:1 and adding into a reactor for reaction to generate fluorine gas; arranging a plurality of groups of graphite products in a graphitization furnace according to required spacing, sequentially filling a heat preservation material and a resistor material, heating the graphitization furnace to furnace center temperature of 1,800-1,900 DEG C after the furnace loading is finished, and introducing nitrogen into the furnace core to remove the air inthe furnace center; when the temperature is raised to 1,900-2,000 DEG C, the chlorine is stopped, and the chlorine is converted to be introduced; when the temperature is raised to 2,300-2,500 DEG C,the fluorine gas generated by the reaction is communicated into the graphitization furnace. The method for purifying graphite by co-heating hexafluoromanganate and antimony pentafluoride generating fluorine gas uses hexafluoromanganate and antimony pentafluoride to produce fluorine gas instead of freon used in the purification process in the prior art, so that the problem that the adverse effect on the environment in the use process of the freon is avoided while the purification effect is good.

Description

Technical field: [0001] The invention relates to the technical field of graphite purification, in particular to a method for purifying graphite by co-heating potassium hexafluoromanganate and antimony pentafluoride to produce fluorine gas. Background technique: [0002] Existing technical status: the current purified graphite is purified by gas heat in graphitization, and most metal halides have relatively low melting and boiling points, especially some high-boiling impurities such as boron, vanadium, molybdenum, silicon, etc. must pass through Chlorination and fluorination can be removed. During graphitization and purification, nitrogen is generally introduced when the temperature of the furnace core reaches a certain level, the air in the furnace core is removed, and then chlorine gas is introduced. The high boiling point impurities form compounds and then reduce the boiling point and discharge with the gas. [0003] However, the freon used in the prior art will destroy ...

Claims

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Application Information

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IPC IPC(8): C01B32/215C01B7/20
CPCC01B32/215C01B7/20
Inventor 黄岱杨辉沈华平肖绍懿
Owner SINOSTEEL NEW MATERIAL ZHEJIANG
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