Unlock instant, AI-driven research and patent intelligence for your innovation.

Synthesis method of nano ZSM-22 molecular sieve

A synthesis method and molecular sieve technology are applied in molecular sieves and alkali exchange compounds, nanotechnology, chemical instruments and methods, etc., to achieve the effect of simple and easy synthesis method, low price and uniform grain size.

Inactive Publication Date: 2019-03-22
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
View PDF6 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although many documents and patents have reported about the synthesis method of nanometer ZSM-22 molecular sieves, the convenient and low-cost synthesis of ZSM-22 molecular sieves with grain size less than 100nm has not been reported yet.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Synthesis method of nano ZSM-22 molecular sieve
  • Synthesis method of nano ZSM-22 molecular sieve
  • Synthesis method of nano ZSM-22 molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Pre-crystallization.

[0036] Mix silica sol (silicon source), aluminum sulfate (aluminum source), potassium hydroxide (alkali source), 1,6-hexanediamine (template agent) and deionized water to form an initial gel with the following molar ratio: Glue mixture, silicon source (as SiO 2 In terms of): aluminum source (as Al 2 o 3 Calculated): template agent: alkali source (in OH - Calculated): deionized water = 1: 0.0125: 0.3: 0.2: 40. The obtained mixture was subjected to hydrothermal dynamic crystallization under autogenous pressure at 160°C for 12 hours; after the crystallization was completed, the solid product was separated by filtration, washed with deionized water until neutral, and dried to obtain a pre-crystallized solid.

[0037] 2. Secondary crystallization.

[0038] Mix the precrystallized solid, potassium hydroxide (alkali source), 1,6-hexanediamine (template) and deionized water obtained by the above precrystallization, and stir for 1 hour. The molar r...

Embodiment 2

[0041] 1. Pre-crystallization.

[0042] Mix silica sol (silicon source), aluminum sulfate (aluminum source), potassium hydroxide (alkali source), 1,6-hexanediamine (template agent) and deionized water to form an initial gel with the following molar ratio: Glue mixture, silicon source (as SiO 2 In terms of): aluminum source (as Al 2 o 3 Calculated): template agent: alkali source (in OH - Calculated): deionized water = 1: 0.005: 0.15: 0.1: 20. The obtained mixture was hydrothermally statically crystallized at 140° C. under autogenous pressure for 12 hours; after the crystallization was completed, the solid product was separated by filtration, washed with deionized water until neutral, and dried to obtain a precrystallized solid.

[0043] 2. Secondary crystallization.

[0044] Mix the precrystallized solid obtained from the above precrystallization, potassium hydroxide (alkali source), 1,6-hexanediamine (template) and deionized water evenly, and stir for 1 hour. The molar ra...

Embodiment 3

[0047] 1. Pre-crystallization.

[0048] Mix silica sol (silicon source), aluminum sulfate (aluminum source), potassium hydroxide (alkali source), 1,6-hexanediamine (template agent) and deionized water to form an initial gel with the following molar ratio: Glue mixture, silicon source (as SiO 2 In terms of): aluminum source (as Al 2 o 3 Calculated): template agent: alkali source (in OH - Calculated): deionized water = 1: 0.016: 0.6: 0.4: 80. The obtained mixture was subjected to hydrothermal dynamic crystallization under autogenous pressure at 180°C for 8 hours; after the crystallization was completed, the solid product was separated by filtration, washed with deionized water until neutral, and dried to obtain a pre-crystallized solid.

[0049] 2. Secondary crystallization.

[0050] Mix the precrystallized solid obtained from the above precrystallization, potassium hydroxide (alkali source), 1,6-hexanediamine (template) and deionized water evenly, and stir for 1 hour. The ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a synthesis method of a nano ZSM-22 molecular sieve. The synthesis method comprises the following steps of: uniformly mixing a silicon source, an aluminum source, an alkali source, a template agent and deionized water to form an initial gel mixture, carrying out hydrothermal crystallization under self-generated pressure at 140-180 DEG C to obtain precrystallized solid, thenuniformly mixing the precrystallized solid, the alkali source, the template agent and deionized water to form a mixture, carrying out hydrothermal crystallization under self-generated pressure at 140-180 DEG C, washing, drying and roasting to obtain the nano ZSM-22 molecular sieve. The synthesis method is low in cost, and is simple, convenient and feasible; the grain size of the synthesized nanoZSM-22 molecular sieve is less than 100 nm; meanwhile, the synthesized nano ZSM-22 molecular sieve has the advantage of uniform grain size distribution.

Description

technical field [0001] The invention relates to a preparation method of nano ZSM-22 molecular sieve and application of nano ZSM-22 molecular sieve. Background technique [0002] With the development of automobile and machinery industry, the performance requirements of mechanical equipment for lubricating oil are also increasing. The demand for Class II and III lubricating oils with low sulfur, low nitrogen, high oxidation resistance, cleanness, good viscosity-temperature and low-temperature fluidity is increasing year by year. Isomerization dewaxing technology is an important technical means to produce high-quality lubricating base oil. Hydroisomerization of long-chain alkanes into branched alkanes can obtain high viscosity index and oil yield while having a lower pour point. The core of isomerization dewaxing technology is the hydroisomerization catalyst, and the design and optimization of the hydroisomerization catalyst is the key to obtain high-quality oil products. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01B39/48B82Y40/00
CPCB82Y40/00C01B39/48C01P2002/72C01P2004/03C01P2004/64
Inventor 李德宝牛鹏宇侯博王乐郗宏娟陈晓燕林明桂贾丽涛
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com