Device for producing high-purity hydrogen bromide by ammonia heat pump rectification and production method thereof

Abstract

The invention belongs to a device for producing high-purity hydrogen bromide by ammonia heat pump rectification and a production method thereof. The device comprises a raw material liquid storage tank, a heat pump and a product tank, wherein the raw material liquid storage tank is sequentially connected with a first rectifying tower and a second rectifying tower through a decompression part, and a liquid phase outlet in the bottom of the second rectifying tower is connected with the product tank and a first raw material gas inlet of the first rectifying tower through a sampling part; an outlet of the heat pump is respectively connected with an inlet of a first reboiler at the bottom of the first rectifying tower and an inlet of a second reboiler at the bottom of the second rectifying tower through an ammonia-oil separator; and an outlet of the first reboiler and an outlet of the second reboiler are respectively connected with a recycle gas inlet of a main condenser, and a recycle gas outlet of the main condenser is connected with an inlet of the heat pump. The device and the method have the characteristics that the unit power consumption of the product is low, and the product purity can be improved to 99.999% electronic grade; guarantee is provided for research of special gas in the electronic industry and development of the semiconductor field, and good economic and social benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of high-purity hydrogen bromide production, and in particular relates to a device and a production method for producing high-purity hydrogen bromide by ammonia heat pump rectification. Background technique [0002] Electronic specialty gases are known as the "blood" and "food" of the electronics industry. They are important raw materials for manufacturing industries such as large-scale integrated circuits, polysilicon, and optical fibers. However, electronic special gases have been monopolized by foreign companies for a long time in the past, seriously affecting the development of my country's semiconductor industry, and also affecting the international competitiveness of my country's integrated circuits and semiconductor-related products. In recent years, due to the rapid development of the electronics industry, it is required to provide high-purity hydrogen bromide products, the hydrogen bromide content is...

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Problems solved by technology

[0003] In order to meet the needs of related domestic industries, some enterprises have begun to try to prepare hydrogen bromide gas products. At present, the more common preparation method is to prepare high-purity bromine by combining a drying tower (filled with phosphoric acid or molecular sieve) and low-temperature rectification. Hydrogen; the above method has the following problems: it is easy to introduce new impurities, hydrogen bromide is highly corrosive to the molecular sieve binder, the adsorption capacity of the adsorbent to water is reduced, and the drying tower absorbs a large amount of gas hydrogen bromide, resulting in waste of resources and product failure. The purity can only reach 99.8%

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