gis type zeolite
A zeolite and spectral technology, applied in other chemical processes, separation methods, products, etc., can solve the problem of unobserved carbon dioxide adsorption and achieve high selectivity of adsorption
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[0103] [Preparation process of hybrid gel]
[0104] The preparation process of the mixed gel is not particularly limited, and may include, for example: a mixing process of mixing a silica source, an aluminum source, an alkali metal source, water, and if necessary, an organic structure specifying agent in one or multiple stages; and the mixing The aging process of the mixture obtained in the process.
[0105] In the mixing step, these components including a silicon oxide source, an aluminum source, an alkali metal source, water and, if necessary, an organic structure specifying agent may be mixed in one step or in multiple stages.
[0106] The order at the time of multistage mixing is not limited, and may be appropriately selected according to the conditions used. When mixing in multiple stages, it may be performed with or without stirring.
[0107] When stirring, it will not specifically limit as long as it is a stirring method used normally, As a specific example, the metho...
Embodiment 1
[0179] Water 259.10g, sodium hydroxide (NaOH, manufactured by Wako Pure Chemical Industries, Ltd.) 0.98g, sodium aluminate (NaAlO 2 , Wako Pure Chemical Industries, Ltd.) 20.50 g and 310.4 g of water glass No. 3 (manufactured by Kishida Chemical) were mixed and stirred for 45 minutes to prepare a mixed gel. The composition of the hybrid gel is α=SiO 2 / Al 2 o 3 =12.0, β=Na 2 O / Al 2 o 3 =3.0, γ=P 2 o 5 / Al 2 o 3 =0.0, δ=H 2 O / Al 2 o 3 =200, ε=R / Al 2 o 3 =0.0. The mixed gel was put into a 1000 mL stainless steel autoclave with a fluororesin inner cylinder, hydrothermally synthesized at 110° C. for 2 days without stirring, and the product was filtered and dried at 120° C. to obtain powdery zeolite.
[0180] 1 g of the obtained zeolite was added to 500 mL of a 0.1 N potassium nitrate aqueous solution, and stirred at 60° C. at 400 rpm for 3 hours. The product was filtered and dried at 120°C to obtain a powdery zeolite in which a part of the cations were exchanged fo...
Embodiment 2
[0184] 258.2 g of water, 3.32 g of sodium hydroxide, 11.2 g of potassium hydroxide, 10.67 g of sodium aluminate, and 165.5 g of No. 3 water glass were mixed and stirred for 1 hour, and a zeolite was synthesized in the same manner as in Example 1, except that the mixture was stirred for 1 hour. The composition of the hybrid gel is α=SiO 2 / Al 2 o 3 =12.30, β=Na 2 O / Al 2 o 3 =5.13, γ=P 2 o 5 / Al 2 o 3 =0.0, δ=H 2 O / Al 2 o 3 =307.5, ε=R / Al 2 o 3 =0.0.
[0185] According to the XRD pattern of the obtained GIS type zeolite, the diffraction peak of (1 0 1) is 12.62°, and the diffraction peak of (3 1 2) is 34.02°. A / B is 1.80.
[0186] For the CO of the obtained GIS-type zeolite 2 and CH 4 The adsorption isotherm was measured, and the adsorption amount under the conditions of 25°C and 760mmHg was respectively CO 2 : 32.2cm 3 / g, CH 4 : 0.2cm 3 / g,N 2 : 0.3cm 3 / g, the adsorption selectivity (a / b) was 161, and the adsorption selectivity (a / c) was 107.3. The alum...
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