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SCM-3 molecular sieve and preparation method thereof

A SCM-3, molecular sieve technology, applied in molecular sieves and alkali exchange compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of undiscovered materials, the Kenyaite structure is not stable enough, etc., and achieve good application prospects and high thermal stability. Effect

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] Kenyaite is a layered silicate material with a molecular formula of Na 2 O 22SiO 2 10H 2 O, Kenyaite's own structure is not stable enough at high temperature, which limits its practical application
In the present invention, SCM-3 molecular sieves are obtained by acidifying Kenyaite containing heteroatoms and then subjected to high-temperature treatment. At present, no material with the same X-ray diffraction crystal structure as SCM-3 molecular sieves has been found

Method used

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  • SCM-3 molecular sieve and preparation method thereof
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  • SCM-3 molecular sieve and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0031] With 0.863 grams of boric acid, 0.41 grams of NaCl, 1.1175 grams of 30% sodium hydroxide aqueous solution, 10 grams of 50% PEG 300 (polyethylene glycol with an average molecular weight of about 300) solution, 11 grams of water and 8.1 milliliters of 40% silica sol solution is mixed evenly, and the molar proportion of gained mixture is:

[0032] 10SiO 2 : 0.4B 2 o 3 : 1.0NaCl: 0.6Na 2 O: 2.5PEG 300: 175H 2 o

[0033] Move the above mixture into the reactor at 180 o C was crystallized for 40 hours, washed and dried after the reaction, and identified as Kenyaite material by XRD, see figure 1 .

[0034] Mix 1 gram of the above-mentioned Kenyaite material with 20 ml of 0.1M hydrochloric acid, stir at 20°C for 24 hours, wash, separate solid from liquid, and dry to obtain a solid product treated with hydrochloric acid. Calcined for 3 hours to obtain SCM-3 molecular sieve, the X-ray diffraction lines of which are shown in Table 1.

[0035]

Embodiment 2

[0037] With 0.863 grams of boric acid, 0.41 grams of NaCl, 1.1175 grams of 30% sodium hydroxide aqueous solution, 10 grams of 50% PEG 300 (polyethylene glycol with an average molecular weight of about 300) solution, 11 grams of water and 8.1 milliliters of 40% silica sol solution is mixed evenly, and the molar proportion of gained mixture is:

[0038] 10SiO 2 : 0.4B 2 o 3 : 1.0NaCl: 0.6Na 2 O: 2.5PEG 300: 175H 2 o

[0039] Move the above mixture into the reactor at 180 o C was crystallized for 40 hours, washed and dried after the reaction, and was identified as Kenyaite material by XRD.

[0040] Mix 1 gram of the above-mentioned Kenyaite material with 20 ml of 0.5M acetic acid, stir in a closed system at 80°C for 24 hours, wash, separate solid-liquid and dry to obtain a solid product, and roast the solid product at 700°C for 3 hours , to obtain SCM-3 molecular sieve, whose X-ray diffraction lines are shown in Table 2.

[0041]

Embodiment 3

[0043] With 0.863 grams of boric acid, 0.41 grams of NaCl, 1.1175 grams of 30% sodium hydroxide aqueous solution, 10 grams of 50% PEG 300 (polyethylene glycol with an average molecular weight of about 300) solution, 11 grams of water and 8.1 milliliters of 40% silica sol solution is mixed evenly, and the molar proportion of gained mixture is:

[0044] 10SiO 2 : 0.4B 2 o 3 : 1.0NaCl: 0.6Na 2 O: 2.5PEG 300: 175H 2 o

[0045] Move the above mixture into the reactor at 180 o C was crystallized for 40 hours, washed and dried after the reaction, and was identified as Kenyaite material by XRD.

[0046] Mix 1 gram of the above-mentioned Kenyaite material with 20 ml of 0.1M hydrochloric acid, stir at 20°C for 24 hours, wash, separate solid from liquid, and dry to obtain a hydrochloric acid-treated solid product. The hydrochloric acid-treated solid product is obtained in Calcined at 800° C. for 3 hours to obtain SCM-3 molecular sieve, whose X-ray diffraction lines are shown in Ta...

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Abstract

The invention relates to an SCM-3 molecular sieve and a preparation method thereof, which mainly solve the technical problems of the molecular sieve SCM-3 having a new structure not involved in the prior art. The invention provides a technical scheme of a new SCM-3 molecular sieve which comprises the following chemical compositions in mole ratio: XO2:nY2O3, wherein X is silicon or germanium; Y is at least one of elements such as aluminum, boron, gallium, iron and the like; 0.002<=n<=0.25; and the maximum value of an X-ray diffraction peak exists when the interplanar distance of the SCM-3 molecular sieve d=16.70+ / -1.7A, d=8.24+ / -0.23A, d=7.24+ / -0.15A, d=6.22+ / -0.12A, d=3.59+ / -0.06A, d=3.48+ / -0.06A and d=3.38+ / -0.06A. Thus, the technical scheme well solves the technical problems. The synthesized SCM-3 molecular sieve has favorable application prospects in the aspects of catalytic cracking of heavy oil and isomerization reaction of organic molecules.

Description

technical field [0001] The invention relates to an SCM-3 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): C01B39/48
CPCC01B39/46C01P2002/72
Inventor 袁志庆杨为民滕加伟陶伟川
Owner CHINA PETROLEUM & CHEM CORP
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