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sn-scm-3 zeolite molecular sieve and preparation method thereof

A technology of molecular sieves and molar ratios, applied in molecular sieves and base exchange compounds, chemical instruments and methods, inorganic chemistry, etc., can solve problems that have not yet been seen

Active Publication Date: 2017-09-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical composition of SCM-3 can contain a certain amount of boron or a small amount of aluminum, but there is no SCM-3 molecular sieve doped with tin on the skeleton.

Method used

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  • sn-scm-3 zeolite molecular sieve and preparation method thereof
  • sn-scm-3 zeolite molecular sieve and preparation method thereof
  • sn-scm-3 zeolite molecular sieve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1 gram of Kenyaite material with a molar ratio of B2O3 / SiO2 of 0.04 was mixed with 20 milliliters of 0.1M hydrochloric acid, stirred at 20°C for 24 hours, washed, solid-liquid separated and dried to obtain a hydrochloric acid-treated solid product, and 2 grams The Kenyaite obtained by hydrochloric acid treatment was mixed with 0.045 g of stannous oxalate and ground, and the solid mixture after grinding was roasted at 600°C for 5 hours to obtain Sn-SCM-3 molecular sieve, whose X-ray diffraction lines are shown in Table 1. In the product, Sn The / Si molar ratio was 0.006.

Embodiment 2

[0042] 1 gram of Kenyaite material with a molar ratio of B2O3 / SiO2 of 0.04 was mixed with 20 milliliters of 10M hydrochloric acid, stirred at 20°C for 24 hours, washed, solid-liquid separated and dried to obtain a hydrochloric acid-treated solid product. The Kenyaite obtained by hydrochloric acid treatment was mixed with 0.089 g of stannous oxalate and ground, and the solid mixture after grinding was roasted at 600°C for 5 hours to obtain Sn-SCM-3 molecular sieve, whose X-ray diffraction line was similar to Table 1. In the product, Sn / Si The molar ratio is 0.009.

Embodiment 3

[0044] 1 gram of Kenyaite material with a molar ratio of B2O3 / SiO2 of 0.04 was mixed with 20 milliliters of 10M hydrochloric acid, and airtightly stirred at 100°C for 24 hours. After washing, solid-liquid separation and drying, the hydrochloric acid-treated solid product was obtained. 2 grams The Kenyaite obtained by hydrochloric acid treatment was mixed with 0.089 gram of stannous oxalate and ground, and the ground solid mixture was roasted at 600° C. for 5 hours to obtain Sn-SCM-3 molecular sieve, whose X-ray diffraction line was similar to Table 1. In the product, Sn / The molar ratio of Si is 0.013.

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Abstract

The invention relates to an Sn-SCM-3 zeolite molecular sieve and a preparation method therefor and mainly solves the technical problem in the prior art that a novel zeolite molecular sieve Sn-SCM-3 is not involved. The invention provides a novel Sn-SCM-3 zeolite molecular sieve. The technical problem is better solved by adopting a technical scheme that the Sn-SCM-3 zeolite molecular sieve is composed of chemical compositions in the following molar ratio: SiO2: nSnO2: mX2O3, wherein n is greater than or equal to 0.001 but less than or equal to 0.12, m is less than 0.10, and X is one of two elements Al and B; according to the Sn-SCM-3 zeolite molecular sieve, diffracted intensity maximum values of X ray diffraction peaks appear at d=16.66+ / 1.7 angstrom, d=8.49+ / 0.25 angstrom, d=7.24+ / 0.15 angstrom, d=6.30+ / 0.12 angstrom, d=5.36+ / 0.06 angstrom, d=3.68+ / 0.06 angstrom, d=3.60+ / 0.06 angstrom and d=3.38+ / 0.06 angstrom and the relative intensity is greater than 1.0%. The synthesized Sn-SCM-3 zeolite molecular sieve has a relatively good application prospect in the aspect of an organic catalytic reaction.

Description

technical field [0001] The invention relates to a Sn-SCM-3 zeolite molecular sieve and a preparation method thereof. Background technique [0002] Zeolite molecular sieve is a crystalline porous silicate material. Its basic structural unit is silicon-oxygen tetrahedron, which forms a three-dimensional network structure of molecular sieve by sharing an oxygen atom. Silicon-oxygen tetrahedron can also be Partially replaced by other kinds of tetrahedra, such as aluminum oxide tetrahedron and germanyl oxide tetrahedron. The most common zeolite molecular sieve is composed of silicon-oxygen tetrahedron and aluminum-oxygen tetrahedron. Since the aluminum-oxygen tetrahedron has electronegativity, the presence of cations is required in the holes of the molecular sieve to compensate for the charge. The common cations are alkali metal ions , can also be H+, NH4+, and organic cations. One of the most important characteristics of zeolite molecular sieves is the characteristic pore arra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/46
Inventor 袁志庆陶伟川滕加伟
Owner CHINA PETROLEUM & CHEM CORP
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