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Synthesis method of interface micro-pore sequence structure LSX (low-silica X-zeolite) molecular sieve for spatially dividing oxygen-enriched adsorbent

A synthesis method and adsorbent technology are applied in the synthesis field of LSX molecular sieve with meso-microporous sequence structure to achieve the effects of good nitrogen adsorption performance, high nitrogen-to-oxygen separation ratio and large adsorption capacity

Inactive Publication Date: 2013-04-24
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, domestic oxygen generators basically still use traditional 5A and 13X molecular sieves as oxygen-enriched adsorbents, and new high-efficiency adsorbents need to be further developed.

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  • Synthesis method of interface micro-pore sequence structure LSX (low-silica X-zeolite) molecular sieve for spatially dividing oxygen-enriched adsorbent
  • Synthesis method of interface micro-pore sequence structure LSX (low-silica X-zeolite) molecular sieve for spatially dividing oxygen-enriched adsorbent
  • Synthesis method of interface micro-pore sequence structure LSX (low-silica X-zeolite) molecular sieve for spatially dividing oxygen-enriched adsorbent

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with specific embodiments.

[0034] 1. Synthetic molecular sieve raw powder

[0035] The present embodiment adopts the static hydrothermal synthesis method, with water glass (SiO 2 26%, Na 2 O8.2%) as silicon source, with sodium metaaluminate (Al 2 o 3 49%, Na 2 O38%) is the aluminum source, a certain amount of amphiphilic polymer is added during the synthesis, and a series of molecular sieve samples are statically synthesized in a stainless steel reactor.

[0036] Specific steps:

[0037] First dissolve 5.55g of sodium metaaluminate in water and stir until fully dissolved, then dissolve 6.06g of KOH and 8.65g of NaOH in water and stir until completely dissolved. Mix the above two solutions evenly, and add 12.31g of water glass, then add amphiphilic polymer PEG400 (polyethylene glycol) and water, mix well under stirring until gel; transfer the gel to a Put it in a stainless steel reaction kett...

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Abstract

The invention discloses a synthesis method of an interface micro-pore sequence structure LSX (low-silica X-zeolite) molecular sieve for spatially dividing oxygen-enriched adsorbent. The method comprises the following steps: A1, synthesizing molecular sieve raw powder; and A2, carrying out lithium ion exchange, namely, firstly exchanging the prepared Na-LSX molecular sieve with the NH<4+>, and then exchanging with the Li<+1> after roasting. The molecular sieve with an interface micro-pore structure is prepared by adopting an one-step method synthesis process, based on the oleophylic and hydrophilic characters, the amphipathic macromolecule is used as a template agent of the synthesis of the molecular sieve, a set of advanced production process which is simpler, more environment-friendly, and lower in energy consumption is explored, the product production process is simple and easy to control, and the energy consumption is reduced over 50%.

Description

technical field [0001] The invention relates to a method for preparing a LSX molecular sieve with a mesoporous layered structure, in particular to a method for synthesizing a mesoporous layered structure LSX molecular sieve used as an air separation oxygen-enriched adsorbent. Background technique [0002] Oxygen is widely used in medical treatment, metallurgy, papermaking, waste water treatment, metal cutting and welding, chemical industry and other industries due to its strong oxidizing and life-sustaining properties. With the continuous improvement of technology and industrial level, the demand for oxygen is increasing rising trend year by year. Before the emergence of pressure swing adsorption technology, air separation oxygen nitrogen production has been monopolized by refrigeration separation technology, and this situation has been maintained until the 1970s; after that, pressure swing adsorption technology began to be applied in the field of air separation and has deve...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/30B01D53/02C01B13/02
Inventor 张妍于建强王宗花朱玉坤汲生荣
Owner QINGDAO UNIV