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SCM-5 molecular sieve and preparation method thereof

A technology of SCM-5 and molecular sieve, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of undiscovered materials and insufficient stability of Magadiite structure, and achieve good application prospects and high thermal stability

Active Publication Date: 2015-03-25
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Magadiite is a layered silicate material with the molecular formula Na 2 O·14SiO 2 10H 2 O, the structure of Magadiite itself is not stable enough at high temperature, which limits its practical application
The present invention obtains SCM-5 molecular sieve by acidifying Magadiite and carrying out high-temperature treatment. At present, no material with the same X-ray diffraction crystal structure as SCM-5 molecular sieve has been found

Method used

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  • SCM-5 molecular sieve and preparation method thereof

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Embodiment 1

[0032] 0.41 g of NaCl, 1.6762 g of 30% aqueous sodium hydroxide solution, 10 g of 50% PEG 300 (polyethylene glycol with an average molecular weight of about 300) solution, 33 g of water and 8.1 ml of 40% silica sol The solution is mixed evenly, and the molar ratio of the resulting mixture is:

[0033] 10SiO2: 1.0NaCl: 0.9Na 2 O: 2.5PEG300: 300H2O

[0034] Move the above mixture into the reactor at 150 oC was crystallized for 96 hours, washed and dried after the reaction, and was identified as Magadiite material by XRD (see figure 1 ).

[0035] 1 gram of the above-mentioned Magadiite material 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 the hydrochloric acid-treated solid product was obtained at 700 ℃ for 3 hours to obtain SCM-5 molecular sieve, and its X-ray diffraction lines are shown in Table 1.

[0036]

Embodiment 2

[0038] 0.41 g of NaCl, 1.6762 g of 30% aqueous sodium hydroxide solution, 10 g of 50% PEG 300 (polyethylene glycol with an average molecular weight of about 300) solution, 33 g of water and 8.1 ml of 40% silica sol The solution is mixed evenly, and the molar ratio of the resulting mixture is:

[0039] 10SiO2: 1.0NaCl: 0.9Na 2 O: 2.5PEG300: 300H2O

[0040] Move the above mixture into the reactor at 150 o C was crystallized for 96 hours. After the reaction was completed, it was washed and dried, and was identified as Magadiite material by XRD.

[0041] Mix 1 gram of the above-mentioned Magadiite material with 20 ml of 0.1M oxalic acid, stir at room temperature for 24 hours, wash, separate solid from liquid and dry to obtain a solid product, which is roasted at 700°C for 3 hours to obtain SCM-5 Molecular sieves, whose X-ray diffraction lines are shown in Table 2.

[0042]

Embodiment 3

[0044] 0.41 g of NaCl, 1.6762 g of 30% aqueous sodium hydroxide solution, 10 g of 50% PEG 300 (polyethylene glycol with an average molecular weight of about 300) solution, 33 g of water and 8.1 ml of 40% silica sol The solution is mixed evenly, and the molar ratio of the resulting mixture is:

[0045] 10SiO2: 1.0NaCl: 0.9Na 2 O: 2.5PEG300: 300H2O

[0046] Move the above mixture into the reactor at 150 o C was crystallized for 96 hours. After the reaction was completed, it was washed and dried, and was identified as Magadiite material by XRD.

[0047] 1 gram of the above-mentioned Magadiite material 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 the hydrochloric acid-treated solid product was obtained at 750 ℃ for 3 hours to obtain SCM-5 molecular sieve, and its X-ray diffraction lines are shown in Table 3.

[0048]

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Abstract

The invention relates to an SCM-5 molecular sieve and a preparation method thereof, for mainly solving the problems of porous materials of novel structures which are not related to in the prior art. By adopting the technical scheme that the SCM-5 molecular sieve is prepared from the following chemical components in a mole ratio: xO2 and nY2O3, wherein X is silicon or germanium, Y is at least one of the elements such as aluminum, boron, gallium and iron, n is greater than or equal to 0.0 and less than or equal to 0.40, the interplanar spacing of the SCM-5 molecular sieve has maximum values of X-ray diffraction peaks when d is equal to 11.20+ / -1.0., 7.35+ / -0.20., 5.50+ / -0.15., 3.60+ / -0.10. and 3.39+ / -0.04., the technical problem is relatively well solved, and the prepared SCM-5 molecular sieve has a relatively good application prospect in catalytic cracking of heavy oil and isomerization of organic molecules.

Description

technical field [0001] The invention relates to an SCM-5 molecular sieve and a preparation method thereof. Background technique [0002] Zeolite molecular sieve is a crystalline silicate material in which silicon can also be partially replaced by other elements, especially some trivalent or tetravalent elements such as Al, B, Ga, Ge, etc., due to its structure and chemical properties With some particularities, zeolite molecular sieves are widely used in the fields of catalysis, adsorption and ion exchange. A key factor that determines the application performance of molecular sieves is its channel or cage characteristics, and these characteristics are determined by the intrinsic crystal structure of molecular sieves. Therefore, obtaining molecular sieves with new crystal structures is of great significance for developing the application of molecular sieves. . [0003] Some molecular sieves can be obtained from nature, however, most of the molecular sieves that have been pra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/02
Inventor 袁志庆滕加伟何欣杨为民
Owner CHINA PETROLEUM & CHEM CORP
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