A kind of zeolite molecular sieve containing ton/mtt framework topology and preparation method thereof

A technology of zeolite molecular sieve and topology structure, applied in the direction of molecular sieve catalyst, crystalline aluminosilicate zeolite, molecular sieve and alkali exchange compound, etc., can solve the problems of low catalyst yield, poor adaptability of molecular sieve, difficult relative content, etc., and achieve uniform particle size , excellent catalytic performance, good repeatability

Active Publication Date: 2019-11-05
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Looking at this type of TON / MTT silica-alumina composite molecular sieve, due to the considerable amount of silica-alumina ZSM-23 structure, the surface of the composite molecular sieve is relatively acidic, so the cracking is often more obvious in the process of hydroisomerization, and the catalyst yield is lower. ; At the same time, conventional synthesis methods are difficult to accurately control the relative content of ZSM-22 and ZSM-23, and the adaptability of molecular sieves is relatively poor

Method used

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  • A kind of zeolite molecular sieve containing ton/mtt framework topology and preparation method thereof
  • A kind of zeolite molecular sieve containing ton/mtt framework topology and preparation method thereof
  • A kind of zeolite molecular sieve containing ton/mtt framework topology and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] Add potassium hydroxide to deionized water, stir to dissolve completely, add ethylmethylamine and sodium borate successively, continue to stir until the mixture is completely dissolved, then add dimethylamine and silica sol in order to form an initial gel with the following molar ratio Mixture (silicon source with SiO 2 In terms of boron source as B 2 o 3 In terms of alkali source in OH - meter), SiO 2 :B 2 o 3 : Ethylmethylamine: Dimethylamine: OH - : Deionized water=1: 0.1: 0.05: 5.0: 0.005: 10.0; Add all-silicon ZSM-22 as a seed crystal in the initial gel mixture of the gained, and the addition amount is the added silicon source (in the form of SiO 21wt.%, and placed in an ultrasonic device, ultrasonic vibration was carried out for 180 minutes at 25°C, ultrasonic frequency 40kHz, and ultrasonic power 100W; the mixture obtained after ultrasonic was placed in a high-pressure microwave with a polytetrafluoroethylene liner In the reaction kettle, use microwave rad...

Embodiment 2

[0031] Add potassium hydroxide to deionized water, stir to dissolve completely, then add diethylamine and potassium borate successively, continue to stir until the mixture is completely dissolved, then add dimethylformamide, n-propylamine and silica gel in sequence to form Proportioned initial gel mixture (silicon source with SiO 2 In terms of boron source as B 2 o 3 In terms of alkali source in OH - meter), SiO 2 :B 2 o 3 : Diethylamine: Dimethylformamide + n-Propylamine: OH - : deionized water = 1: 0.05: 0.1: 4.0 (dimethylformamide: n-propylamine = 3: 1, molar ratio): 0.01: 30.0; add all-silicon ZSM-22 as a crystal to the resulting initial gel mixture species, the amount added is the added silicon source (as SiO 2 2wt.%, and placed in an ultrasonic device, ultrasonic vibration was carried out for 180 minutes at 25°C, ultrasonic frequency 40kHz, and ultrasonic power 100W; the mixture obtained after ultrasonic was placed in a high-pressure microwave with a polytetrafluo...

Embodiment 3

[0033] Add potassium hydroxide to deionized water, stir to dissolve completely, add 1,6-hexamethylenediamine, boric acid successively, continue to stir until the mixture is completely dissolved, then add isopropylamine, methyl orthosilicate and ethyl orthosilicate in order , forming an initial gel mixture with the following molar ratio (silicon source to SiO 2 In terms of boron source as B 2 o 3 In terms of alkali source in OH - meter), SiO 2 :B 2 o 3 : 1,6-hexanediamine: Isopropylamine: OH - : Deionized water = 1 (methyl orthosilicate: ethyl orthosilicate = 1:4, molar ratio, with SiO 2 Total): 0.025: 0.2: 3.0: 0.02: 20.0; Add all-silicon ZSM-22 as a seed crystal to the obtained initial gel mixture, and the addition amount is the added silicon source (measured as SiO 2 5wt.%, and placed in an ultrasonic device, ultrasonic vibration was carried out for 120 minutes at 30°C, ultrasonic frequency 50kHz, and ultrasonic power 500W; the mixture obtained after ultrasonic was pl...

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Abstract

The invention relates to a non-aluminium zeolite molecular sieve containing a TON / MTT skeleton topology structure and a preparation method of the zeolite molecular sieve. The preparation method comprises the steps of dissolving an inorganic alkaline source by using deionized water, then adding a template agent A, a boron source, an iron source or a gallium source, dissolving completely, then adding a template agent B or a silicon source, and adding an-all silicon ZSM-22 molecular sieve as seed crystal into obtained initial gel and then performing ultrasound; utilizing microwave radiation to heat a mixture subjected to the ultrasound so as to obtain a non-aluminum zeolite molecular sieve with a TON / MTT composite topology structure after crystallization. According to the method, the non-aluminium zeolite molecular sieve replaced with a heteroatom is utilized, the acidity is moderate, and the multilevel acidity distribution is adjustable; by adopting the preparation method provided by the invention, the synthesis time is short, the miscellaneous crystal is less, the particle size is uniform, and the repeatability is good. The composite molecular sieve has a huge potential application value in the aspects such as hydrocracking and isomerization.

Description

technical field [0001] The invention relates to a zeolite molecular sieve containing TON / MTT skeleton topology and a preparation method thereof. Background technique [0002] With the increasingly stringent requirements of environmental protection regulations and the rapid development of the automobile industry, the demand for high-quality lubricating oil is gradually increasing for new types of machinery and equipment, and the quality requirements are also getting higher and higher. Therefore, it is imperative to develop lubricating oil quality to II and III oils with low nitrogen, low sulfur, low ash content, high oxidation resistance, high detergency, dispersibility, low volatility, good viscosity temperature and low temperature fluidity , so that the base oil production process based on solvent refining and catalytic dewaxing is gradually replaced by isomerization dewaxing process. The isomerization dewaxing reaction is to convert the long side chains of wax molecules a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/48C01B39/08C01B39/12B82Y40/00B01J29/80
CPCB01J29/80B82Y40/00C01B39/082C01B39/087C01B39/12C01B39/48C01P2002/72C01P2004/03C01P2004/61C01P2004/64C01P2006/12
Inventor 李德宝林明桂侯博贾丽涛郗宏娟陈晓燕
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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