A kind of method of drying hydrogen bromide gas

A hydrogen bromide and gas technology, applied in the field of inorganic chemical industry and hydrogen bromide gas purification, can solve the problems of high dehydration depth, little significance for industrial production, high energy consumption, etc., and achieve high dehydration efficiency

Active Publication Date: 2014-10-01
中昊光明化工研究设计院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of partially liquefying hydrogen bromide at -70°C has a high dehydration depth, requires low-temperature refrigeration, consumes a lot of energy, is difficult to control, and has little significance for industrial production.

Method used

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  • A kind of method of drying hydrogen bromide gas

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Effect test

Embodiment 1

[0022] Hydrogen bromide gas produced by burning bromine in hydrogen, with a flow rate of 10NM 3 / h, water content 1500-2000ppm, using two-stage series-connected packing drying tower for drying, the nominal diameter of the packing drying tower is 200mm, and the height is 1200mm. After drying, the water content in the hydrogen bromide gas is 10ppm after defogging.

Embodiment 2

[0024] Hydrogen bromide gas produced by burning bromine in hydrogen, with a flow rate of 10NM 3 / h, water content 1500-2000ppm, using two-stage series-connected packing drying tower for drying, the nominal diameter of the packing drying tower is 200mm, and the height is 1200mm. The percentage concentration is 10% phosphorous acid), and the secondary dehydrating agent uses phosphorus tribromide liquid circulation with a mass percentage concentration of 99%. After secondary dehydration and drying, the water content in the hydrogen bromide gas after defogging is 12ppm.

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Abstract

A method of dried bromide gases belongs to the field of inorganic chemical and hydrogen gaseous purification technology.This method of dried bromide gases allows the hydrogen gases containing moisture to enter the drying tower of the filler from the bottom, and connect the liquid inorganic bromide, triglycetic phosphorus and hydrogen bromide from the top of the drying tower of the fillerThe gas is in the inverse flow of the drying tower in the drying tower. The two -stage series of filler drying tower is dried. After passing the dehomato, the water content is lower than 20 ppm dry bromide gases. At the same timeEssenceTrilyarized phosphorus liquids can be used circularly, but after the concentration is less than 80%, vacuum distillation can be used to recycle and use it.This method is more efficient than the current method. The dehydration efficiency is higher. The water content of hydrogenation can be less than 20PPM. It is suitable for the case where the hydrogen gaseous pressure is relatively small in the production process. It is especially suitable for bromine bromine bromine in hydrogen.The removal of water in hydrogen gases.

Description

technical field [0001] The invention relates to a method for drying hydrogen bromide gas, belonging to the technical fields of inorganic chemical industry and hydrogen bromide gas purification. Background technique [0002] Hydrogen bromide gas is widely used in medicine, chemical industry, lighting, semiconductor, solar photovoltaic, especially silicon or chip etching. At present, there are many methods for preparing hydrogen bromide gas, such as bromine burning in hydrogen at high temperature, bromine aromatic hydrocarbon substitution method, bromine-red phosphorus wet method, hydrobromic acid-phosphorus pentoxide dehydration method, phosphorus tribromide water solution and so on. No matter which production method is adopted, the produced gas contains a high concentration of moisture, and the removal of moisture becomes the most important link in the purification of hydrogen bromide gas, which restricts the liquefaction and filling of hydrogen bromide gas into steel cylin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B7/09
Inventor 范正林任少科
Owner 中昊光明化工研究设计院有限公司
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