Zeolite molecular sieve containing TON/MTT skeleton topology structure and preparation method of zeolite molecular sieve

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: 2017-12-01
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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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  • Zeolite molecular sieve containing TON/MTT skeleton topology structure and preparation method of zeolite molecular sieve
  • Zeolite molecular sieve containing TON/MTT skeleton topology structure and preparation method of zeolite molecular sieve
  • Zeolite molecular sieve containing TON/MTT skeleton topology structure and preparation method of zeolite molecular sieve

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Embodiment 1

[0029] Add potassium hydroxide to deionized water, stir to completely dissolve, add ethylmethylamine and sodium borate successively, continue stirring until the mixture is completely dissolved, add dimethylamine and silica sol in order to form an initial gel with the following molar ratio Mixture (silicon source with SiO 2 Calculated, boron source is B 2 O 3 Based on OH - Count), 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 to the initial gel mixture obtained, and the addition amount is the silicon source (with SiO 2 Calculate) 1wt.%, and placed in an ultrasonic device, at 25 ℃, ultrasonic frequency 40kHz, ultrasonic power 100W, ultrasonic vibration for 180 minutes; the mixture obtained after ultrasonic is placed in a high-pressure microwave with PTFE lining In the reactor, use microwave radiation (microwave radiation frequency is 900MHz) to heat to 140℃, and crystallize under autog...

Embodiment 2

[0031] Add potassium hydroxide to deionized water, stir to dissolve completely, add diethylamine, potassium borate successively, continue to stir until the mixture is completely dissolved, add dimethylformamide, n-propylamine and silicone gel in order to form a mole Proportioning initial gel mixture (silicon source with SiO 2 Calculated, boron source is B 2 O 3 Based on OH - Count), 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 to the resulting initial gel mixture as crystal Species, the addition amount is the added silicon source (with SiO 2 Calculate) 2wt.%, and placed in an ultrasonic device, at 25 ℃, ultrasonic frequency 40kHz, ultrasonic power 100W conditions for ultrasonic oscillation for 180 minutes; the mixture obtained after ultrasound is placed in a high-pressure microwave with a polytetrafluoroethylene lining In the reactor, us...

Embodiment 3

[0033] Add potassium hydroxide to deionized water, stir to dissolve completely, add 1,6-hexamethylene diamine, boric acid successively, continue stirring until the mixture is completely dissolved, add isopropylamine, methyl orthosilicate and ethyl orthosilicate in order , The initial gel mixture (silicon source with SiO 2 Calculated, boron source is B 2 O 3 Based on OH - Count), SiO 2 : B 2 O 3 :1,6-Hexanediamine: Isopropylamine: OH - : Deionized water = 1 (methyl orthosilicate: ethyl orthosilicate = 1:4, molar ratio, based on SiO 2 Calculate): 0.025: 0.2: 3.0: 0.02: 20.0; add all-silicon ZSM-22 as a seed crystal to the initial gel mixture obtained, and the addition amount is the silicon source (with SiO 2 Calculate) 5wt.%, and placed in an ultrasonic device, at 30 ℃, ultrasonic frequency 50kHz, ultrasonic power 500W, ultrasonic oscillation for 120 minutes; the mixture obtained after ultrasonic is placed in a high-pressure microwave with a polytetrafluoroethylene lining In the re...

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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 a TON / MTT framework topology structure 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 lubricants for new machinery and equipment has gradually increased, and the quality requirements have become higher and higher. Therefore, it is imperative for the quality of lubricating oil to develop into Group II and III oils with low nitrogen, low sulfur, low ash content, high oxidation resistance, high cleanliness, dispersibility, low volatility, good viscosity-temperature properties and low-temperature fluidity. As a result, the base oil production process based on solvent refining and catalytic dewaxing is gradually replaced by the isomeric dewaxing process. The isomeric dewaxing reaction converts the long side chains of wa...

Claims

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Application Information

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Patent Type & Authority Applications(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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