A kind of beta molecular sieve and preparation method thereof

A technology of beta molecular sieve and silicon atom, applied in the field of beta molecular sieve and its preparation, can solve the problems of low catalytic activity of catalyst, affect molecular sieve skeleton structure, reduce molecular sieve crystallinity, etc., and achieve high catalytic activity, isomerization ability, condensation point Low and uniform skeleton silicon-alumina structure

Active Publication Date: 2017-08-22
CHINA PETROLEUM & CHEM CORP +1
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is to burn the original powder of β molecular sieve at high temperature to remove the template agent, which will affect the skeleton structure of the molecular sieve, greatly reduce the crystallinity of the molecular sieve, and also affect the acidity of the molecular sieve. The catalytic activity of the catalyst prepared by this method is not high. , the product quality of aviation fuel and diesel middle distillates still needs to be further improved

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
  • A kind of beta molecular sieve and preparation method thereof
  • A kind of beta molecular sieve and preparation method thereof
  • A kind of beta molecular sieve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The preparation method of β molecular sieve of the present invention comprises the following steps:

[0031] (1) Contact the original powder of β molecular sieve with normal pressure and dynamic water vapor, the contact temperature is 500~650℃, and the time is 5~10 hours;

[0032] (2) Contacting the product obtained in step (1) with ammonium fluorosilicate, then filtering, washing with water and drying to obtain β molecular sieve.

[0033] In step (1), the method of contacting the original powder of β molecular sieve with normal pressure and dynamic water vapor is preferably to place the original powder of β molecular sieve in a container, then introduce water vapor from one end of the container, and pass through the original powder of β molecular sieve from The other end of the container is drained. In order to make the molecular sieve treatment more uniform, it is best to place the molecular sieve in a rotating container such as a tube furnace. The water vapor enters...

Embodiment 1

[0099] Take the original powder of β molecular sieve (synthesized by hydrothermal method using tetraethylammonium hydroxide as template agent, the weight content of the template agent in the original powder of β molecular sieve is about 11.8%, provided by Sinopec Catalyst Fushun Branch), its chemical SiO 2 / Al 2 o 3 The molar ratio is 25.5, Na 2 O content is 2.45wt%, in its skeleton structure, through 29 Si MAS NMR spectrum, the distribution of silicon atoms in different coordination states is obtained as follows: Si (4Al) is 7.6%, Si (3Al) is 30.6%, Si (2Al) is 32.3%, Si (1Al) is 21.0% %, Si (0Al) is 8.5%. Take 1000g of the above-mentioned β molecular sieve raw powder, put it into a tube furnace, adopt the method of temperature program (heating rate is 100°C / hour), and start to introduce 100wt% water vapor when the temperature of the tube furnace rises to 300°C, water vapor The flow rate is 50L / hour, the tube furnace is heated to 550°C, and the constant temperature time ...

Embodiment 2

[0101] Get the former powder of β molecular sieve with embodiment 1. Take 1000g of the above-mentioned molecular sieve, put it into a tube furnace, adopt the method of temperature program (heating rate: 100°C / hour), and start to introduce 100wt% water vapor when the temperature of the tube furnace rises to 300°C, the flow rate of water vapor is 70L / hour, the tube furnace is heated to 600°C, and the constant temperature time is 8 hours. The obtained molecular sieve number is BS-2.

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
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a beta molecular sieve, a preparation method thereof and a hydrogenation catalyst containing the beta molecular sieve. The properties of the β molecular sieve are as follows: SiO 2 / Al 2 o 3 The molar ratio is 30~150, the non-framework aluminum accounts for less than 2% of the total aluminum, and the silicon atoms coordinated by the Si(0Al) structure account for more than 95% of the silicon atoms in the skeleton structure. The preparation method comprises: contacting the original powder of beta molecular sieve with normal pressure and dynamic steam, and then contacting with ammonium fluorosilicate. The β molecular sieve of the present invention is suitable as an acidic component of a diesel oil hydrogenation upgrading catalyst and a hydrocracking catalyst.

Description

technical field [0001] The invention relates to a beta molecular sieve and a preparation method thereof. The β molecular sieve can be used as an active component of a hydrocracking catalyst, and can be used as an active component of a diesel hydrogenation upgrading catalyst. Background technique [0002] Hydrocracking technology has the characteristics of strong adaptability of raw materials, great flexibility of product schemes, high selectivity of target products, good product quality, and high added value. It can directly convert various heavy and low-quality raw materials into clean fuel oil and high-quality chemical raw materials , has become one of the most important heavy oil deep processing technologies in the modern oil refining and petrochemical industry, and has been increasingly widely used in countries all over the world. Hydrocracking technology has become the core technology of the combination of "oil-chemical-fiber" in the modern oil refining industry. Hydro...

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): C01B39/02B01J32/00B01J29/06B01J29/076B01J29/80C10G45/12C10G47/20
Inventor 刘昶王珂琦王凤来杜艳泽赵红关明华
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap