BEA type binder-free dewatering silica-rich zeolite adsorbent and preparation method thereof
A technology of adsorbent and binder, which is applied in the field of hydrophobic high-silica zeolite adsorbent and its preparation, and can solve the problems of low adsorption separation efficiency and weak adsorption force
Active Publication Date: 2011-09-21
SHANGHAI FUXU MOLECULAR SIEVE
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Problems solved by technology
However, for isomers with smaller molecular diameters, the adsorption force is obviously weak, and the adsorption and separation efficiency is low.
Method used
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Embodiment Construction
[0025] Further describe the present invention by embodiment below:
[0026] 1. Sorbent Forming
[0027] serial number
binder
Binder / Zeolite
Raw powder silicon aluminum molar ratio
1
Silica sol
0.18
5
2
Silica-alumina glue
0.25
100
3
Silica
0.35
200
4
0.43
300
5
water glass
0.18
5
6
0.25
100
7
0.35
200
[0028] 2. Adsorbent crystallization
[0029]
[0030] 3. Acid desodium dealumination and hydrophobization treatment
[0031]
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Abstract
The invention relates to a BEA type binder-free dewatering silica-rich zeolite adsorbent and a preparation method thereof, belonging to the technical field of adsorbents. The preparation method of the BEA type binder-free dewatering silica-rich zeolite adsorbent comprises the following steps of: adding amorphous alumino silica gel bonder which is rich in silicon dioxide into market purchased sodium BEA type zeolite powder as a raw material to form into a granule shape; rotating crystals of granules in situ under a hydrothermal condition; then eliminating sodium and aluminum by an inorganic acid; and carrying out hydrophobization processing in high-temperature water vapour to prepare the BEA type binder-free dewatering silica-rich zeolite adsorbent. The BEA type binder-free dewatering silica-rich zeolite adsorbent can effectively separate organics with the diameters of 0.6-0.7 nm.
Description
technical field [0001] The invention belongs to the technical field of adsorbents, and in particular relates to a hydrophobic high-silica zeolite adsorbent and a preparation method thereof. Background technique [0002] Hydrophobic silicalite adsorbents have special adsorption properties of organophilicity and hydrophobicity, and have shape selectivity for adsorbed molecules (ie, adsorbate). Because of its high structural thermal stability, acid resistance, regeneration after use, long life and many other advantages, it is widely used in the fields of isomer separation, biomass concentration and purification, and environmental protection. Chinese patent ZL92113807.5 introduces a method for preparing a hydrophobic silica zeolite molecular sieve. The topological structure type of the zeolite adsorbent prepared by the method is MFI type (ZSM-5). ZSM-5 zeolite is a medium-pore molecular sieve, which contains ten-membered ring straight channels (pore diameter 0.53nm×0.56nm) and ...
Claims
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IPC IPC(8): B01J20/16B01J20/30
Inventor 龙英才程晓维汪靖沈浩然
Owner SHANGHAI FUXU MOLECULAR SIEVE