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Technology for preparing nitrogen trifluoride by direct fluorination of molten salt

A technology of nitrogen trifluoride and fluorination method, applied in the direction of nitrogen and non-metallic compounds, can solve problems such as environmental pollution, and achieve the effect of convenient use and reasonable design

Inactive Publication Date: 2011-07-27
天津东方宜信物流有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology not only has reasonable process and simple preparation, but also has good product quality. The purity of the produced nitrogen trifluoride gas is over 98%, and it solves the problem of environmental pollution.

Method used

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  • Technology for preparing nitrogen trifluoride by direct fluorination of molten salt
  • Technology for preparing nitrogen trifluoride by direct fluorination of molten salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] refer to figure 1 , make an integrated upper reaction tower 2 and connect and install the upper reaction tower outlet pipe 1, connect with the lower reaction tower 6 through the middle outlet pipe 4 of the lower reaction tower, the gas atomizer 5 is connected by the connecting pipeline 3, and one end is connected with the upper reaction tower 2, The other end is connected with the lower reaction tower 6 and assembled into one body.

[0013] Implement the technical work flow of the present invention to be:

[0014] First, the fluorine gas reaches the gas atomizer 5 through the connection line 3, and thus enters the lower reaction tower 6, the lower reaction tower 6 is characterized by a relatively high aspect ratio and low power input, and the aspect ratio of this area is 10 to 100 with a power input of 500W / m 3 Below, this area is used for reacting fluorine gas under relatively high concentration, and the conversion ratio of fluorine gas is 45%-65%, and then gas enter...

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Abstract

The invention discloses a technology for preparing nitrogen trifluoride by direct fluorination of molten salt. A reaction tower outlet pipe is connected on an integrated upper reaction tower, the upper reaction tower is connected with a lower reaction tower through a lower reaction tower intermediate outlet pipe, a gas sprayer is connected through a connecting pipeline, one end of the gas sprayer is connected with the upper reaction tower, the other end of the gas sprayer is connected with the lower reaction tower, and all the parts are assembled to form a whole. The technology has reasonable design, is convenient to use, and is an ideal nitrogen trifluoride preparation technology.

Description

Technical field [0001] The invention relates to a process technology for preparing chemical product-nitrogen trifluoride, in particular to a technology for preparing nitrogen trifluoride by direct fluorination of molten salt, which is suitable for chemical synthesis of high-purity nitrogen trifluoride. Background technique [0002] At present, the preparation of nitrogen trifluoride by the molten salt method is to contact the fluorine-containing raw material stream and ammonium bifluoride liquid in the reaction zone for a period of time under conditions sufficient to generate nitrogen trifluoride. In the contacting step, the melt acidity value of the ammonium bifluoride liquid is reduced, the reaction product stream is discharged, 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 Melt acidity v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/083
Inventor 李中元
Owner 天津东方宜信物流有限公司