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

Method for improving Y-shaped molecular sieve water heat stability by employing cage heteroatom

A technology of hydrothermal stability and thermal stability, applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the reaction process, crystallinity and hydrothermal properties of heteroatom Y molecular sieves that cannot be applied to catalytic cracking Low stability and other problems, to achieve the effect of improving thermal stability and hydrothermal stability, and improving the stability of the skeleton

Inactive Publication Date: 2010-09-08
CHINA UNIV OF PETROLEUM (BEIJING)
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the introduction of heteroatoms into Y molecular sieves is mainly through gas-solid replacement or liquid-solid replacement, that is, various heteroatoms are introduced into the framework of Y molecular sieves in the ultra-stable process ("Secondary Synthesis and Characterization of Heteroatom Zeolites I , II", "Molecular Catalysis", 1992, 04, 05 issues), but because the crystallinity and hydrothermal stability of the heteroatom Y molecular sieve synthesized by the secondary synthesis are far lower than the pure silicon aluminum Y molecular sieve, resulting in the heteroatom Y molecular sieve Molecular sieves cannot be applied to the reaction process of catalytic cracking

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
  • Method for improving Y-shaped molecular sieve water heat stability by employing cage heteroatom
  • Method for improving Y-shaped molecular sieve water heat stability by employing cage heteroatom
  • Method for improving Y-shaped molecular sieve water heat stability by employing cage heteroatom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Preparation and ultra-stable treatment of TiY molecular sieve

[0031] Step 1: Preparation of crystallization directing agent

[0032] According to 15Na 2 O: Al 2 o 3 : 2Ti(SO 4 ) 2: 15SiO 2 : 230H 2 The ratio of O is water glass (Beijing Red Star Soda Soda Factory, modulus: 3.1~3.4), NaOH (Beijing Chemical Plant, chemically pure, effective content ≮82%), NaAlO 2 (Beijing Chemical Plant, chemically pure), Ti(SO 4 ) 2 (Beijing Chemical Plant, chemically pure) and H 2 After mixing O evenly, age at 30°C for 3 days to obtain the liquid phase directing agent.

[0033] Step 2: Synthesis of TiY molecular sieve

[0034] According to 3.5Na 2 O: Al 2 o 3 : Ti(SO 4 ) 2 : 9SiO 2 : 320H 2 The raw material ratio of O is water glass (same as above), NaOH (same as above), aluminum sulfate (Beijing chemical plant, chemically pure), Ti (SO 4 ) 2 (Beijing chemical plant, chemically pure), directing agent (the amount of directing agent added is Al in the reac...

Embodiment 2

[0041] Example 2: Preparation and ultra-stable treatment of the comparative sample Y molecular sieve

[0042] Step 1: Preparation of crystallization directing agent

[0043] According to 15Na 2 O: Al 2 o 3 : 15SiO 2 : 230H 2 The ratio of O is water glass (Beijing Red Star Soda Soda Factory, modulus: 3.1~3.4), NaOH (Beijing Chemical Plant, chemically pure, effective content ≮82%), NaAlO 2 (Beijing Chemical Plant, chemically pure) and H 2 After mixing O evenly, age at 30°C for 3 days to obtain the liquid phase directing agent.

[0044] Step 2: Synthesis of Y molecular sieve

[0045] According to 3.5Na 2 O: Al 2 o 3 : 9SiO 2 : 320H 2 The raw material proportioning of O, with water glass (same as above), NaOH (same as above), aluminum sulfate (Beijing chemical plant, chemically pure), directing agent (directing agent add-on is Al in the reaction system 2 o 3 10% of the total substance mass) and H 2 O mixed evenly to obtain an opaque milky white gel. The obtained gel...

Embodiment 3

[0052] Embodiment 3: Preparation and ultra-stable treatment of FeY molecular sieve

[0053] Step 1: Preparation of crystallization directing agent

[0054] With embodiment 1 step one, the heteroatom source Ti(SO 4 ) 2 Replaced by Fe(NO 3 ) 3 .

[0055] Step 2: Synthesis of FeY molecular sieve

[0056] With embodiment 1 step 2, the heteroatom source Ti(SO 4 ) 2 Replaced by Fe(NO 3 ) 3 , the content of Fe atoms in the crystallized product is 4.2wt%, and the Na in the crystallized product is analyzed by X-ray fluorescence detection. 2 O content is 15.2wt%, Al 2 o 3 Content is 22.9wt%, SiO 2 The content is 57.6wt%, Fe 2 o 3 The content is 4.3wt%, and the crystallinity of the FeY molecular sieve is 80% as detected by XRD.

[0057] Step 3: Ultra-stable treatment of FeY molecular sieve

[0058] With step 3 of embodiment 1, the heteroatom Y molecular sieve USFeY1 and USFeY2 of ultra-stable treatment are obtained through bis-cross-baking, wherein USFeY1 adds a small amo...

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

PropertyMeasurementUnit
transmittivityaaaaaaaaaa
crystallinityaaaaaaaaaa
Login to View More

Abstract

The present invention provides process of selecting proper hetero atom to modify the skeleton of Y-type molecular sieve and to raise the heat stability and hydrothermal stability of Y-type molecular sieve. The process includes direct hydrothermal crystallizing, adding proper amount of hetero atom to prepare MY-type molecular sieve containing skeleton hetero atom, performing the secondary ion exchange and secondary roasting of MY-type molecular sieve after adding small amount of hetero atom in the same kind to obtain USMY type molecular sieve with very high heat stability and hydrothermal stability. The molecular sieve with very high heat stability and hydrothermal stability is applied in the catalysts for catalytic cracking, hydrogenation cracking, etc of hydrocarbons.

Description

technical field [0001] The invention relates to a method for improving the hydrothermal stability of Y-type molecular sieves by using skeleton heteroatoms, belonging to the technical field of chemical industry. Background technique [0002] Y-type molecular sieve has a hollow skeleton structure, large specific surface area, good structural stability, and low production cost. Currently, it is mainly used as an active component of catalytic cracking catalysts for petroleum processing. [0003] Due to the harsh operating conditions of the catalytic cracking reaction, there is an environment of high temperature and high water vapor, so the cracking catalyst, especially the active component of the catalyst (such as Y molecular sieve) is required to have high thermal stability and hydrothermal stability. For the Y-type molecular sieve used in this kind of catalytic cracking reaction, in order to improve its hydrothermal stability, the usual treatment method is to perform ion excha...

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): C01B39/24B01J29/08
Inventor 沈志虹鞠雅娜赵俊桥朱俊哲陈然赵佳周冬严
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com