Method for efficiently preparing oxygen production molecular sieve

A molecular sieve and high-efficiency technology, applied in the direction of molecular sieves and base exchange compounds, oxygen preparation, chemical instruments and methods, etc., can solve the problems of molecular sieve structure damage, reduce molecular sieve performance, etc., and achieve high production capacity, which is conducive to large-scale production and high adjustment The effect of exchange efficiency

Pending Publication Date: 2022-02-11
JIANGSU TIANNUO NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Reactors are traditionally used to prepare oxygen-producing molecular sieves. Molecular sieves are soaked in the exchange solution for too long, which destroys the structure of the molecular sieves, thereby reduc...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 30m to the solution batching tank in advance 3 water, start stirring, put in 220kg of lithium sulfate solid, stir for 30 minutes until lithium sulfate is completely dissolved, add a small amount of ammonia water to adjust the pH of the solution to 9, open the steam valve to heat, and heat the lithium sulfate solution to 80°C for use; Add 8m to the beating tank 3 Water, start stirring, put in 2 tons of LSX molecular sieve filter cake with a solid content of about 50%, and replenish water to 10m 3 , beat for 2 hours, then turn on the belt filter for ion exchange, turn on the belt filter and vacuum unit according to the program, turn on the beating tank for stirring, turn on the secondary, tertiary, and quaternary lithium exchange liquid pumps, and control the pump outlets and The opening of the reflux valve is used to adjust the reflux flow at all levels, the lithium exchange liquid feed pump and the slurry transfer pump are turned on, and the slurry flow range is co...

Embodiment 2

[0029] Add 30m to the solution batching tank in advance 3 water, start stirring, put in 510kg of lithium chloride solid, stir for 30 minutes until lithium chloride is completely dissolved, add a small amount of ammonia water to adjust the pH of the solution to 11, open the steam valve for heating, and heat the lithium chloride solution to 90°C for use; then Add 3m to the beating tank 3 Water, start stirring, put in 2 tons of LSX molecular sieve filter cake with a solid content of about 50%, and replenish water to 5m 3 , beat for 2 hours, then turn on the belt filter for ion exchange, turn on the belt filter and vacuum unit according to the program, turn on the beating tank for stirring, turn on the secondary, tertiary, and quaternary lithium exchange liquid pumps, and control the pump outlets and The opening of the reflux valve is used to adjust the reflux flow at all levels, and the lithium exchange liquid feed pump and slurry transfer pump are turned on to control the slurr...

Embodiment 3

[0031] Add 20m in advance to the solution batching tank 3 water, start stirring, put in 510kg lithium chloride solid, stir for 30 minutes until lithium chloride is completely dissolved, add a small amount of ammonia water to adjust the pH of the solution to 10, open the steam valve for heating, and heat the lithium chloride solution to 90°C for use; then Add 3m to the beating tank 3 Water, start stirring, put in 2 tons of LSX molecular sieve filter cake with a solid content of about 50%, and replenish water to 5m 3 , beat for 2 hours, then turn on the belt filter for ion exchange, turn on the belt filter and vacuum unit according to the program, turn on the beating tank for stirring, turn on the secondary, tertiary, and quaternary lithium exchange liquid pumps, and control the pump outlets and The opening of the reflux valve is used to adjust the reflux flow at all levels, and the lithium exchange liquid feed pump and slurry transfer pump are turned on to control the slurry f...

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PUM

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Abstract

The invention discloses a method for efficiently preparing an oxygen production molecular sieve, the method comprises the following steps: preparing a high-temperature lithium salt solution in advance, wherein the temperature of the lithium salt solution is more than 60 DEG C, the lithium ion concentration is more than 0.4 mol/L, adjusting the pH value of the lithium solution to 9-11 by using ammonia water, wherein the mass ratio of the lithium salt solution to the molecular sieve is (10: 1)-(40: 1), and carrying out lithium ion exchange on an LSX type molecular sieve by using a belt filter, pulping by using a pulping tank before the LSX is fed, wherein the solid content of the slurry is between 5% and 30%, after the molecular sieve slurry is fed into a belt filter, performing spraying exchange with lithium liquid, washing and drying, and obtaining the LiLSX type molecular sieve. The method is simple and efficient, one-step operation is realized, the exchange contact time is short, and the oxygen production performance of the molecular sieve can be improved while the high crystallinity of the molecular sieve is ensured.

Description

technical field [0001] The invention relates to the technical field of molecular sieve preparation methods, in particular to a method for efficiently preparing oxygen-producing molecular sieves. Background technique [0002] Low silicon-aluminum ratio X-type molecular sieve (LSX) has a low silicon-aluminum ratio, developed pores, good adsorption performance and nitrogen and oxygen separation effect, and has water adsorption, CO 2 Wide range of applications such as adsorption and gas separation. Lithium ion exchange (LiLSX), calcium ion exchange (CaLSX), silver ion exchange (AgLSX), etc., are carried out through the sodium potassium type (Na, KLSX) or sodium type (NaLSX) low-silicon X molecular sieve synthesized by the hydrothermal method. It can significantly improve the pore structure and nitrogen and oxygen separation performance of LSX molecular sieve, so controlling the ion exchange conditions has a direct impact on the oxygen production performance of the final product...

Claims

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Application Information

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IPC IPC(8): C01B39/02C01B13/02
CPCC01B39/02C01B39/026C01B13/027C01P2006/80
Inventor 孙玄玄张伟冯承刚曹金朋魏丙峰
Owner JIANGSU TIANNUO NEW MATERIAL TECH
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