Preparation method for electronic-grade high-purity chlorine from industrial liquid chlorine

An electronic-grade, liquid chlorine technology, applied in chlorine/hydrogen chloride, chlorine/hydrogen chloride purification and other directions, can solve the problems of dependence on imports, high price, weak purification technology, etc., and achieve the effect of high income, low cost and high purity

Active Publication Date: 2014-03-12
HANGZHOU ELECTROCHEM GROUP
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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

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  • Preparation method for electronic-grade high-purity chlorine from industrial liquid chlorine

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Embodiment 1

[0031] figure 1 It is a process flow diagram of the preparation method of the present invention. Such as figure 1 Shown, preparation method of the present invention comprises the following steps:

[0032] a. Chlorine gasification of raw material industry, removal of most metal ions, at 0.4MP pressure and 20°C temperature at 1 M 3 The flow rate of / h enters from the bottom of the first-stage drying tower 1 equipped with 13X zeolite molecular sieve numbered DH05, and comes out from the top of the tower after removing most of the water through adsorption;

[0033] b. Then enter the bottom of the secondary drying tower equipped with 13X type zeolite molecular sieve numbered DH06, after deep dehydration, remove trace moisture and come out from the top of the tower. After removal, the moisture content in chlorine gas is less than 0.5ppm;

[0034] c. Then it enters from the bottom of the adsorption tower equipped with SSZ-13 zeolite molecular sieve, absorbs and removes carbon d...

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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...

Claims

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Application Information

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IPC IPC(8): C01B7/07
Inventor 卢孔燎郑琪章意坚万波
Owner HANGZHOU ELECTROCHEM GROUP
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