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Method for preparing composite material of pillared layered silicate and MFI type molecular sieve

A layered silicate, composite material technology, applied in molecular sieves and alkali exchange compounds, chemical instruments and methods, silicon compounds, etc., can solve the lack of microporous system, limited application in the field of catalysis, layered silicates and other problems to achieve the effect of good application prospects

Active Publication Date: 2018-08-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the layered silicate in the prior art has a single pore size and lacks an ordered microporous system, thus limiting its application in the field of catalysis

Method used

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  • Method for preparing composite material of pillared layered silicate and MFI type molecular sieve
  • Method for preparing composite material of pillared layered silicate and MFI type molecular sieve
  • Method for preparing composite material of pillared layered silicate and MFI type molecular sieve

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Experimental program
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Effect test

Embodiment 1

[0025] 532ml deionized water, 9.1gNaF, 10.7gH 3 BO 3 , 8.66g NaOH, and 141ml PEG300 (polyethylene glycol with an average molecular weight of about 300) were mixed evenly, and 250ml of 40% silica sol solution was slowly added under vigorous stirring, transferred to a closed reaction kettle, and reacted at 160°C for 70 hours. After the reaction was completed, it was separated, washed with deionized water, and dried, and was identified as Kenyaite phyllosilicate by XRD. The product was named Ken-1.

Embodiment 2

[0027] Mix 15g of Ken-1, 24g of cetyltrimethylammonium bromide, and 300g of deionized water, stir for 2 hours, then add 15g of 25% tetrapropylammonium hydroxide solution, the weight ratio of the resulting mixture is: layered silicic acid Salt: cetyltrimethylammonium bromide: tetrapropylammonium hydroxide: water = 10:16:2.5:207.5. The mixture was reacted at 80°C for 24 hours. After the reaction was completed, it was separated, washed and dried, and the product was named Ken-swell.

[0028] The XRD pattern of Ken-swell is shown in figure 1 ,Depend on figure 1 It can be seen that after puffing, the layer spacing of Kenyaite phyllosilicate increases to about

Embodiment 3

[0030] Mix 15g Ken-1, 75g cetyltrimethylammonium bromide, and 465g deionized water, stir for 2 hours, add 60g 25% tetrapropylammonium hydroxide solution, the weight ratio of the obtained mixture is: Kenyaite layered silicon Salt: cetyltrimethylammonium bromide: tetrapropylammonium hydroxide: water = 10:50:10:340. The mixture was reacted at room temperature for 72 hours. After the reaction was completed, it was separated, washed and dried, and the product was named Ken-swell-2.

[0031] Ken-swell-2 has a Kenyaite layered structure identified by XRD, and the interlayer spacing increases to about

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Abstract

The invention relates to a composite of pillared phyllosilicate and an MFI type molecular sieve and a preparation method of the composite, and mainly solves the problem that in the prior art, the application of phyllosilicate in the catalytic field is limited as the phyllosilicate has a single pore diameter and lacks an ordered microporous system. The composite has two symbiotic phases, and is characterized in that an XRD diffraction spectrogram has a maximum spacing value d at the angstroms of 38.37+ / -4.8, 11.12+ / -0.67, 9.95+ / -0.45, 3.86+ / -0.07, 3.83+ / -0.06, 3.75+ / -0.06, 3.72+ / -0.06, 3.64+ / -0.06 and 3.42+ / -0.05. The composite has a relatively good application prospect in the aspects of catalytic cracking and heavy oil cracking reaction.

Description

technical field [0001] The invention relates to a method for preparing a composite material of pillared layered silicate and MFI molecular sieve. Background technique [0002] Kenyaite is a layered silicate material, which can be obtained from natural minerals or artificially synthesized. Its chemical formula is Na 2 O 22SiO 2 10H 2 O, where Na can also be replaced by other alkali metal elements, such as K, Rb and Cs, and Si can also be partially replaced by other elements, generally trivalent elements, including B, Al, Fe and Ga. The interlayer spacing of Kenyaite phyllosilicates is Because of its large interlayer distance, it can allow larger molecules to freely enter and exit between its layers, so it has broad application prospects in adsorption, catalysis, and preparation of inorganic-polymer symbiosis. [0003] The layers of Kenyaite are packed disorderly, which makes most of its layer surfaces inaccessible to reactant molecules. At the same time, the thermal st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/44C01B39/46
Inventor 陶伟川袁志庆
Owner CHINA PETROLEUM & CHEM CORP
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