Method for preparing electronic grade high-purity chlorine gas with industrial liquid chlorine as raw material

Abstract

The invention discloses a preparation method for electronic-grade high-purity chlorine from industrial liquid chlorine. The electronic-grade high-purity chlorine with purity of more than 99.999% is prepared from industrial liquid chlorine through gasification, multistage physical drying, removal of carbon dioxide through adsorption, compression condensation and rectification for removal of low-boiling-point gas like nitrogen, oxygen, hydrogen, carbon monoxide and methane. The preparation method has the advantages of low cost, high benefits and capacity of preparing a high-purity product; and the product is extensively applicable to preparation of optical fiber communication, microelectronic and high temperature superconducting materials.

Description

technical field [0001] The invention relates to a method for preparing electronic-grade high-purity chlorine gas, in particular to a method for purifying and preparing electronic-grade high-purity chlorine gas by using industrial liquid chlorine as a raw material. Background technique [0002] High-purity chlorine is an indispensable basic material in the preparation of optical fiber communication, microelectronics, and high-temperature superconducting materials. In 2012, the output of optical fiber was nearly 150 million kilometers. In 2015, it is estimated that the optical fiber preform will exceed 4,500 tons. With the rapid development of etc., the amount of high-purity chlorine is increasing, and the requirements are getting higher and higher. However, the domestic purification technology is weak, and the high-purity chlorine used in optical fibers is basically dependent on imports, which is expensive. [0003] In recent years, while the quality of optical fiber is impro...

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Problems solved by technology

[0002] High-purity chlorine is an indispensable basic material in the preparation of optical fiber communication, microelectronics, and high-temperature superconducting materials. In 2012, the output of optical fiber was nearly 150 million kilometers. In 2015, it is estimated that the optical fiber preform will exceed 4,500 tons. With the rapid development of etc., the amount of high-purity chlorine is increasing, and the requirements are getting higher and higher. However, domestic purification technology is weak, and high-purity chlorine for optical fibers basically relies on imports, which are expensive.

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