Device for preparing nitrogen trifluoride by electrolysis melting of ammonium bifluoride
A technology of nitrogen trifluoride and ammonium bifluoride, which is applied in the direction of nitrogen and non-metallic compounds, can solve the problems of poor nitrogen trifluoride gas quality, imperfect electrolytic cell structure design, and difficult long-term operation and production, and achieve product quality High, reasonable structure design, stable operation effect
Inactive Publication Date: 2014-07-02
天津东方宜信物流有限公司
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Problems solved by technology
During the contact reaction process, the melt acidity value of the ammonium bifluoride liquid is reduced, and the reaction product stream is discharged, and the mixed gas of elemental fluorine and hydrogen fluoride is in contact with the ammonium bifluoride bulk liquid, so that the initial melt acidity value in the reaction zone is greater than that of the ammonium bifluoride bulk liquid In the above-mentioned device, especially due to the imperfect structural design of the electrolytic cell, the quality of the produced nitrogen trifluoride gas is poor, the yield is low, and the operation is complicated, so it is not easy to run continuously for a long time.
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[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0011] refer to figure 1 , a device for preparing nitrogen trifluoride by electrolyzing and melting ammonium bifluoride, including an electrolytic cell 1, an activated carbon adsorption tower 9, a buffer tank 2, ammonium fluoride and hydrogen fluoride storage tanks, etc., and the electrolytic cell 1 is assembled in an outer heating plate box 20 , the negative electrode 18 and the anode 19 are housed on it, and the electrolytic cell is connected with the buffer tank 2, the hydrogen fluoride condensation tower 3, the left sodium fluoride adsorption tower 4, the right sodium fluoride adsorption tower 5, and the defluorination through the connecting pipeline 17 and successively according to its functions. Tower 6, alkali washing tower 7, molecular sieve adsorption tower 8, activated carbon adsorption tower 9, sodium peroxide adsorption tower 10, sodium thio...
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The invention relates to a device for preparing nitrogen trifluoride by electrolysis melting of ammonium bifluoride. The device comprises an electrolytic cell, an active carbon adsorbing tower, a buffer tank and the like, and is characterized in that the electrolytic cell is assembled in an external heating plate box body, a cathode and an anode are arranged on the electrolytic cell, and the electrolytic cell is sequentially connected serially with the buffer tank, a hydrogen fluoride condensing tower, a left sodium fluoride adsorbing tower, a right sodium fluoride adsorbing tower, a defluorination tower, a molecular screen adsorbing tower, an active carbon adsorbing tower, a sodium peroxide adsorbing tower, a low-temperature rectifying tower, a gas storing tank, a compressor, a filling platform and the like into a whole through a connecting pipeline according to functions. The device has the advantages of reasonable structure design, simple equipment, stable operation, strong maneuverability and high product quality, the purity of the produced nitrogen trifluoride gas reaches above 98 percent, and the problem of environment pollution is solved.
Description
technical field [0001] The invention belongs to a device for producing chemical products, in particular to a device for preparing nitrogen trifluoride by electrolyzing and melting ammonium bifluoride. Background technique [0002] In the prior art, the device for preparing nitrogen trifluoride using the molten salt method is roughly composed of an electrolytic cell, a reactor, a melt regenerator, a separator, a cooler, etc., and the above devices are connected as a whole through connecting pipes . The fluorine-containing feed stream and the ammonium bifluoride liquid are contacted in a reaction zone for a period of time under conditions sufficient to generate nitrogen trifluoride. During the contact reaction process, the melt acidity value of the ammonium bifluoride liquid is reduced, and the reaction product stream is discharged, and the mixed gas of elemental fluorine and hydrogen fluoride is in contact with the ammonium bifluoride bulk liquid, so that the initial melt a...
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IPC IPC(8): C01B21/083
Inventor 梁喜乐
Owner 天津东方宜信物流有限公司