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Binder-free sub-mesoporous high-silicon FER zeolite adsorbent and preparation method thereof

A binder-free and adsorbent-free technology, applied in chemical instruments and methods, silicate, aluminum silicate, etc., can solve problems such as adverse side effects, achieve large adsorption capacity, high temperature resistance and organic solvent erosion, and avoid adverse effects side effects

Pending Publication Date: 2021-12-10
FUYU ZHANGJIAGANG NEW MATERIALS TECH CO LTD
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Problems solved by technology

[0005] For this reason, the present invention provides a binder-free sub-mesoporous high-silica FER zeolite adsorbent and its preparation method, which can solve the technical problems of adsorption and separation of high-silica FER zeolite and some adverse side effects caused by binders

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  • Binder-free sub-mesoporous high-silicon FER zeolite adsorbent and preparation method thereof
  • Binder-free sub-mesoporous high-silicon FER zeolite adsorbent and preparation method thereof
  • Binder-free sub-mesoporous high-silicon FER zeolite adsorbent and preparation method thereof

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[0042] 1. Preparation process

[0043] 1. Preparation of raw materials: FER zeolite molecular sieve raw powder is self-made by the R&D Center of Fuyu Company, and the preparation scale is kg / batch; the amorphous silica binder is silica sol for molding produced in Qingdao, with a silica content of 40wt%; chemically pure n-propylamine The organic template agent is the product of Shanghai Chemical Reagent Company; the forming extrusion aid is Tianjing powder.

[0044] 2. Molding: Using silica sol as binder and safflower powder as extrusion aid, weigh a certain amount of FER molecular sieve raw powder, silica sol for molding with a silica content of 40%, and add a small amount of scallion powder to mix uniform. The ratio of each raw material is as follows: FER powder: dry basis of silica sol: scallop powder = 4:1:0.16. Add an appropriate amount of water to the above mixture and knead it into a "dough" with a suitable consistency. Put the "dough" in an extruder and extrude it int...

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Abstract

The invention relates to a high-silicon binder-free zeolite adsorbent and a preparation method thereof. The high-silicon binder-free zeolite adsorbent is structurally characterized by having the structure type of FER type zeolite, the molar ratio of silicon oxide to aluminum oxide of the high-silicon binder-free zeolite adsorbent is 261, the compressive strength of the high-silicon binder-free zeolite adsorbent is 57.6 N / CM, XRD powder diffraction of the FER type zeolite has five characteristic diffraction peaks. The preparation method of the high-silicon binder-free zeolite adsorbent comprises the following steps of: mixing high-silicon FER zeolite raw powder and an amorphous silicon dioxide binder, performing molding, drying and roasting to prepare an adsorbent precursor; and carrying out hydrothermal reaction in organic amine steam to obtain the high-silicon binder-free zeolite adsorbent. Compared with an adsorbent with a binder, the adsorbent provided by the invention has the advantages of large effective adsorption capacity, high temperature resistance and organic solvent erosion resistance, capability of avoiding some adverse side effects caused by the binder in adsorption separation, and the like.

Description

technical field [0001] The invention relates to the field of zeolite adsorbents, in particular to a binder-free sub-mesoporous high-silicon FER zeolite adsorbent and a preparation method thereof. Background technique [0002] FER zeolite is a kind of natural zeolite found in natural minerals. After determining its crystal structure, Vaughan, P.A. named it Ferrierite (Chinese name is also known as Ferrierite) [Acta Crystallolor., 1966, 21,983-990]. The artificially synthesized FER zeolite in the reactant system containing an organic template is also called ZSM-35. [0003] High silica FER zeolites exhibit hydrophobic / organophilic properties, and their framework collapse temperature exceeds 1300°C. The FER zeolite framework has two kinds of intersecting channels, namely, the ten-membered ring elliptical main channel along the [001] direction with a size of 0.54X0.42nm, and the eight-membered ring elliptical channel along the [010] direction with a size of 0.48X0. 35nm, the t...

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Application Information

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IPC IPC(8): B01J20/16B01J20/30
CPCB01J20/165
Inventor 李亨利龙英才林德昌
Owner FUYU ZHANGJIAGANG NEW MATERIALS TECH CO LTD
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