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A kind of preparation method and application of heu type molecular sieve

A technology of molecular sieve and molecular weight, which is applied in separation methods, chemical instruments and methods, and other chemical processes, can solve the problems that the safety factor cannot meet the production and transportation, and the safety factor is reduced, and achieves excellent separation ability and large dynamic adsorption capacity.

Active Publication Date: 2019-04-02
LUOYANG JALON MICRO NANO NEW MATERIALS CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, for coalbed methane, increasing the pressure will reduce the safety factor, especially for low-concentration coalbed methane, the safety factor may not meet the requirements of production and transportation

Method used

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  • A kind of preparation method and application of heu type molecular sieve
  • A kind of preparation method and application of heu type molecular sieve
  • A kind of preparation method and application of heu type molecular sieve

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Embodiment 1

[0035] (1) Preparation of K-HEU: 50g of artificially synthesized HEU raw powder (Al 2 o 3 8.2SiO2 2 0.45K 2 O 0.38Na 2 O 0.11CaO 0.06MgO 3H 2O) Mix with 15g of potassium chloride in a beaker, add 500ml of distilled water, heat to 80°C while stirring, exchange for 1h, filter and wash, bake at 80°C for more than 12h to obtain K-HEU, K 2 The molar ratio of O in the ion is 99.8%.

[0036] (2) Preparation of K / Na-HEU: Mix 40g of K-HEU prepared in step (1) with 160g of sodium chloride in a beaker, add 800ml of distilled water, heat to 75°C while stirring, and exchange for 45min. Repeat the above steps for the second exchange of the filter cake obtained by filtering and washing. After filtering and washing, bake at 80°C for more than 12 hours to obtain K / Na-HEU, Na 2 The molar ratio of O in the ion is 81.4%, K 2 The molar proportion of O is 18.6%.

[0037] (3) Preparation of K / Na / Mg / Ca-HEU: Mix 15g of K / Na-HEU prepared in step (2) with 15g of magnesium chloride and 7g of calc...

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Abstract

The invention provides a preparation method and application of an HEU (Heulandite) type molecular sieve. The preparation method comprises the following steps: firstly, carrying out complete exchange by adopting K ions; secondly, carrying out Na exchange and exchanging Ca and Mg finally; controlling exchange conditions so as to enable the mol ratios of each ion calculated by oxide to be as follows: 15 percent to 35 percent of K2O, 20 percent to 45 percent of Na2O, 15 percent to 45 percent of MgO and 15 percent to 35 percent of CaO; finally, obtaining K / Na / Mg / Ca-HEU raw powder. An HEU type molecular sieve adsorbent prepared by the invention has accurate pore channel control effect and relatively strong ion acting force on O2 and has an excellent O2 / CH4 separation capability under low pressure (smaller than or equal to 0.1MPa), so that dynamic O2 / CH4 separation becomes possible; the acting force on the O2 by the adsorbent is adjusted by utilizing the difference of acting forces on the O2 of K, Na, Mg and Ca, so that the dynamic adsorption capability is the greatest.

Description

technical field [0001] The invention relates to a technology in the field of molecular sieve material preparation, in particular to a preparation method and application of an HEU type molecular sieve. Background technique [0002] my country is a large coalbed methane production country, but because of low methane content and high oxygen content, a large amount of coalbed methane is directly evacuated as waste gas. This not only causes a waste of resources, but also causes serious environmental problems. Oxygen removal in coalbed methane has always been a key issue in the safe utilization of coalbed methane. Existing oxygen removal in coalbed methane mainly focuses on catalytic method and cryogenic method. These two methods are relatively mature, but they face problems such as high catalyst cost, high energy consumption, and complicated process, and their scope of application is limited. For many coal mines with small gas volume and poor continuity, it is necessary to find...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18C10L3/10B01D53/02B01J20/30
CPCB01D53/02B01D2257/104B01D2258/05B01J20/186C10L3/101
Inventor 余成磊魏渝伟王勇兵
Owner LUOYANG JALON MICRO NANO NEW MATERIALS CO LTD
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