Technique for reclaiming and utilizing product gas absorbed by molecular sieve in the separation process of neon isotope

A technology of isotope separation and molecular sieve, which is applied in the field of recovery and utilization of molecular sieve adsorption product gas, can solve the problems of packaging failure, air leakage, high impurities, etc., and achieve the effect of reducing product loss, high purification efficiency and simple process

Inactive Publication Date: 2009-12-23
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] In the prior art, no reports have been found specifically for the recovery and purification of product gas with high impurities
[0003] Separation of Stable Isotopes by Thermal Diffusion 22 In the production of Ne, due to the use of molecular sieves to purify impurities at low temperature, a large amount of product gas remains in the final molecular sieves, thus wasting a large amount of products; at the same time, due to the inevitable leakage of a small amount of air in the system, O 2 , N 2 , CO 2 In addition, there are accidents such as packaging failure, high impurity or unqualified abundance in the separation process
In order to ensure the purity of the product is 99.99%, molecular sieves are generally used for low-temperature purification, but at the same time, 20% of the product is lost

Method used

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  • Technique for reclaiming and utilizing product gas absorbed by molecular sieve in the separation process of neon isotope
  • Technique for reclaiming and utilizing product gas absorbed by molecular sieve in the separation process of neon isotope

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Such as figure 1 shown, a 22 The recovery and utilization process of molecular sieve adsorption product gas in Ne separation, the process includes the recovery of molecular sieve adsorption product gas, the purification of recovered gas and other process steps; the flow chart of the recovery step of molecular sieve adsorption product gas is not shown, and the recovery The equipment for the gas purification step includes a purification bottle 1, a circulating gas inlet 2, a sampling port (also a molecular sieve adsorption gas inlet and a purified product gas outlet) 3, a water injection port 4, an electric furnace 5, Cu chips 6, a sponge Ti 7, and a circulation Gas outlet 8, water (or lye) 9, drain outlet 10, purification column 11; described purification column 11 is vertically arranged, and its center is filled with sponge Ti7, and both ends are Cu chips 6, and described electric furnace 5 is arranged on On both sides of the purification column 11, the gas in the puri...

Embodiment 2

[0036] Such as figure 1 shown, a 22 The recovery and utilization process of molecular sieve adsorption product gas in Ne separation, the process includes the recovery of molecular sieve adsorption product gas, the purification of recovered gas and other process steps; the flow chart of the recovery step of molecular sieve adsorption product gas is not shown, and the recovery The equipment of the gas purification step is the same as in Example 1.

[0037] There are 9000ml99% 22 The neon isotopic gas with a Ne purity of 95% is purified on a purification column equipped with a 400mm sponge Ti, with 100mm Cu chips on the upper and lower sides, and an inner diameter of 10mm. After 24h, the purity reached 98%, and 99% after 48h. 8600ml99% available 22 Ne, transfer the gas to the packaging system to get 8 x 800ml of 99% with a purity of 99.99% 22 Ne isotopic products.

Embodiment 3

[0039] Such as figure 1 shown, a 22 The recovery and utilization process of molecular sieve adsorption product gas in Ne separation, the process includes the recovery of molecular sieve adsorption product gas, the purification of recovered gas and other process steps; the flow chart of the recovery step of molecular sieve adsorption product gas is not shown, and the recovery The equipment of the gas purification step is the same as in Example 1.

[0040]Due to the cascade leakage of the tower, the impurity of the 9000ml initial product in the gas collecting bottle is too high, and the purity is 90%. In order to meet the purity requirements, the initial product is transferred into a purification bottle; it is purified with the same purification column in parallel with another bottle of secondary product with high impurities (purity 95%). The column is 800mm in length, 15mm in inner diameter, equipped with 500mm sponge body, and has 100mm of Cu chips on the upper and lower sid...

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PUM

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Abstract

The present invention relates to the recovery and utilization process of molecular sieve adsorption product gas in neon isotope separation. In the process, molecular sieve adsorption gas adopts segmental desorption to recover 90-95%, and the recovery gas purification adopts chemical method to remove O2 from metal Cu scraps and sponge Ti. , N2, H2, the purification column is placed vertically, both ends are filled with Cu chips, the middle is sponge Ti, CO2 is absorbed by NaOH solution, the gas in the purification column is naturally circulated by thermosiphon principle, and the gas purity can be purified from 70 to 98% to 99%; The process of the invention is simple, the purification efficiency is high, no excessive manual operation is required, and the cost can be saved by about 20%.

Description

technical field [0001] The invention relates to thermal diffusion method for separating stable isotopes 22 The supplementary process of Ne production process, especially related to the recovery and utilization process of molecular sieve adsorption product gas in neon isotope separation. Background technique [0002] In the prior art, there is no report specifically aimed at the recovery and purification of product gas with high impurities. [0003] Separation of Stable Isotopes by Thermal Diffusion 22 In the production of Ne, due to the use of molecular sieves to purify impurities at low temperature, a large amount of product gas remains in the final molecular sieves, thus wasting a large amount of products; at the same time, due to the inevitable leakage of a small amount of air in the system, O 2 , N 2 , CO 2 In addition, there are accidents such as packaging failure, high impurity or unqualified abundance in the separation process. In order to ensure the purity of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D59/16B01D59/26
Inventor 李虎林陈仙送李良君杜晓宁
Owner SHANGHAI RES INST OF CHEM IND
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