Preparation method and application of novel sub-mesoporous zeolite molecular sieve adsorbent

A technology of zeolite molecular sieve and adsorbent, which is applied in the field of preparation of new sub-medium pore zeolite molecular sieve adsorbent, and achieves the effect of strong adsorption capacity

Pending Publication Date: 2021-02-26
FUYU ZHANGJIAGANG NEW MATERIALS TECH CO LTD
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Problems solved by technology

[0006] For this reason, the present invention provides a preparation method and application of a novel sub-medium pore zeolite molecular sieve adsorbent to overco

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  • Preparation method and application of novel sub-mesoporous zeolite molecular sieve adsorbent
  • Preparation method and application of novel sub-mesoporous zeolite molecular sieve adsorbent
  • Preparation method and application of novel sub-mesoporous zeolite molecular sieve adsorbent

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Embodiment Construction

[0031] In order to make the objects and advantages of the present invention clearer, the present invention will be further described below in conjunction with the examples; it should be understood that the specific examples described here are only for explaining the present invention, and are not intended to limit the present invention.

[0032] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.

[0033] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "left", "right", "inner", "outer" and other indicated directions or positional relationships are based on the terms shown in the accompanying drawings. The direction or positional relationship shown is ...

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Abstract

The invention relates to a preparation method of a novel sub-mesoporous zeolite molecular sieve adsorbent. The preparation method comprises the following steps: step 1, preparing the sub-mesoporous zeolite molecular sieve adsorbent from natural stilbite mineral powder through structural stabilization modification; and 2, partially replacing calcium ions in the mineral powder obtained by mechanically crushing the natural stilbite through multiple times of cation exchange of a salt or dilute mineral acid aqueous solution, and heating to 350-600 DEG C for 1-2 hours to prepare the sub-mesoporous zeolite molecular sieve adsorbent. In the step 1, the natural stilbite is subjected to structure stabilization modification, so that the natural stilbite has relatively high methane adsorption capacityand nitrogen adsorption selectivity which are rarely possessed by zeolite molecular sieves with other structure types, and the natural stilbite is subjected to adsorption separation of small molecular gas or organic matters and removal of toxic and harmful molecules; the method has important industrial application prospects in the fields of chemical engineering and environmental protection such as concentration and enrichment of methane in coalbed methane and oilfield gas.

Description

technical field [0001] The invention relates to the technical field of zeolite molecular sieve adsorbent, in particular to a preparation method and application of a novel sub-medium pore zeolite molecular sieve adsorbent. Background technique [0002] Zeolite adsorbent is a fine chemical widely used in industry and daily life. It is often used in drying dehydrating agent, adsorption of gas and organic molecules, separation of isomer molecules, ion exchange, etc. The zeolite molecular sieve adsorbent is widely used and has a huge market demand. It is expected that the global annual demand will exceed 2 million tons in 2023. Zeolite molecular sieves are divided according to their pore size and framework silicon-aluminum molar ratio SAR and pore size range. Common industrial adsorbents can be roughly divided into low-silicon small-pore zeolites such as LTA-type zeolite, referred to as A zeolite, and low-silicon large-pore zeolites such as FAU-type zeolite. Referred to as X zeo...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/28B01J20/30B01D53/02
CPCB01J20/186B01J20/28011B01J20/28073B01D53/02Y02C20/40
Inventor 龙英才濮鹏翔沈飞沈威张含新
Owner FUYU ZHANGJIAGANG NEW MATERIALS TECH CO LTD
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