Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

ZSM-22/ZSM-23 composite molecular sieve and preparation method

A composite molecular sieve, ZSM-23 technology, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of not achieving the effect, and achieve the effect of low pour point, high yield and high viscosity index

Inactive Publication Date: 2009-09-23
PETROCHINA CO LTD +1
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, it is hoped that a catalyst has multiple functions of shape-selective cracking and isomerization at the same time, and good results cannot be achieved if a single molecular sieve is used

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
  • ZSM-22/ZSM-23 composite molecular sieve and preparation method
  • ZSM-22/ZSM-23 composite molecular sieve and preparation method
  • ZSM-22/ZSM-23 composite molecular sieve and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 4.4 g NaAlO 2 (Al 2 o 3 36.3%, Na 2 O 32.5%) was added in the mixture of 4.1 gram NaOH and 474 gram water, stirred 4 hours, then added the sodium type ZSM-22 molecular sieve synthesized by 15 gram comparative example, stirred 3 hours, added 66 gram pyrrolidine, stirred 1 hour , and finally add 261.1 grams of 30% silica sol to obtain the initial colloid. The molar composition of the initial colloid is: SiO 2 / Al 2 o 3 =83, R / SiO 2 =0.7,OH - / SiO 2 =0.08,H 2 O / SiO 2 =25, the addition of ZSM-22 molecular sieve is 0.2 of the silica weight. After stirring for 12 hours, it was transferred to a 1000 ml autoclave, and after sealing, the stirring speed was adjusted to 300 rpm, and the temperature was raised to 165° C. in 4 hours, followed by hydrothermal crystallization for 72 hours. After the crystallization was completed, the autoclave was placed in water for rapid cooling, the product was filtered and washed until the pH of the filtrate was neutral, and then drie...

Embodiment 2

[0040] 6.1 g NaAlO 2 (Al 2 o 3 36.3%, Na 2 O 32.5%) was added in the mixture of 4.1 gram NaOH and 1232 gram water, stirred 4 hours, then added the hydrogen type ZSM-22 molecular sieve synthesized by 45 gram comparative example, stirred 3 hours, added 283 gram pyrrolidine, stirred 1 hour , and finally add 261.1 grams of 30% silica sol to obtain the initial colloid. The molar composition of the initial colloid is: SiO 2 / Al 2 o 3 =60, R / SiO 2 =3,OH - / SiO 2 =0.08,H 2 O / SiO 2 =65, the addition of ZSM-22 molecular sieve is 0.6 of the silica weight. After stirring for 12 hours, it was transferred to a 2000 ml high-pressure reactor. After sealing, the stirring speed was adjusted to 300 rpm, and the temperature was raised to 165° C. in 4 hours, and hydrothermal crystallization was carried out for 72 hours. After the crystallization was completed, the autoclave was placed in water for rapid cooling, the product was filtered and washed until the pH of the filtrate was neut...

Embodiment 3

[0042] 1.2 g NaAlO 2 (Al 2 o 3 36.3%, Na 2 O 32.5%) was added in the mixture of 25.6 gram NaOH and 474 gram water, stirred 4 hours, then added the sodium type ZSM-22 molecular sieve synthesized by 0.75 gram comparative example, stirred 3 hours, added 4.7 gram pyrrolidine, stirred 1 hour , and finally add 261.1 grams of 30% silica sol to obtain the initial colloid. The molar composition of the initial colloid is: SiO 2 / Al 2 o 3 =300, R / SiO 2 =0.05,OH - / SiO 2 =0.5,H 2 O / SiO 2 =25, the addition of ZSM-22 molecular sieve is 0.01 of the silica weight. After stirring for 12 hours, it was transferred to a 1000 ml autoclave, and after sealing, the stirring speed was adjusted to 300 rpm, and the temperature was raised to 165° C. in 4 hours, followed by hydrothermal crystallization for 72 hours. After the crystallization was completed, the autoclave was placed in water for rapid cooling, the product was filtered and washed until the pH of the filtrate was neutral, and 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 relates to a ZSM-22 / ZSM-23 composite molecular sieve and a synthesis method thereof. The silica-alumina colloid obtained by mixing silicon source, aluminum source, inorganic alkali, water and template is mixed with ZSM-22 molecular sieve. The molar composition of silica-alumina colloid is: SiO2 / Al2O3=60~300, R / SiO2=0.05~3, OH- / SiO2=0.05~0.5, H2O / SiO2=10~65, the amount of ZSM-22 molecular sieve added is 0.01~0.6 of the weight of silica, and the template agent is one of pyrrolidine, isopropylamine and isobutylamine or several. The obtained reaction mixture is hydrothermally crystallized to obtain a composite molecular sieve. The composite molecular sieve of the invention exhibits excellent catalytic performance when used in the isomerization dewaxing process of lubricating oil.

Description

technical field [0001] The invention relates to a composite molecular sieve, in particular to a ZSM-22 / ZSM-23 composite molecular sieve. [0002] The present invention also relates to the preparation method of the composite molecular sieve. Background technique [0003] Zeolite molecular sieve materials have special shape-selective catalytic properties due to their uniform composition, regular structure, adjustable surface acidity and molecular size pores, and are used as catalytic materials, gas separation and adsorbents, ion exchangers, etc. It has been widely used in the fields of oil and natural gas processing, fine chemicals, environmental protection and nuclear waste treatment. The catalytic function of molecular sieves has also developed from simple acid catalysis to base catalysis, acid-base bifunctional catalysis, oxidation-reduction catalysis and metal catalysis. The basis of molecular sieve catalytic functionalization and application expansion is the development...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/02
Inventor 王炳春田志坚徐云鹏徐竹生林励吾
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products