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

A kind of acrylonitrile catalyst and its preparation method and application

A technology of acrylonitrile catalyst and oxide, which is applied in the direction of catalyst activation/preparation, hydrocarbon ammoxidation preparation, chemical instruments and methods, etc., to achieve the effects of improving the operating cycle of the device, reducing the load, and high conversion rate of propylene

Active Publication Date: 2020-06-02
YINGKOU XIANGYANG CATALYST
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since most of the acrylonitrile plants have undergone capacity expansion and transformation, the production capacity has increased by 60% on the original basis, and the main equipment of these plants has not changed

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 acrylonitrile catalyst and its preparation method and application
  • A kind of acrylonitrile catalyst and its preparation method and application
  • A kind of acrylonitrile catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0050] The first embodiment of the present invention provides an acrylonitrile catalyst comprising a metal oxide represented by the following general formula (1),

[0051] Bi a Fe b Ni c Mg d Ce e A f B g C h Mo 12 o x (1)

[0052] in:

[0053] A is one or more elements selected from the group consisting of lithium, sodium, potassium, rubidium and cesium;

[0054] B is one or more elements selected from the group consisting of praseodymium, europium, terbium, and dysprosium;

[0055] C is one or two elements selected from the group consisting of vanadium and cadmium;

[0056] a, b, c, d, e, f, g and h represent the number of atoms of each element;

[0057] a is 1.2 to 3.0;

[0058] b is 1.0 to 2.7;

[0059] c is 3 to 8;

[0060] d is 0.3 to 1.6;

[0061] e is 0.4~1.8;

[0062] The contents of f, g and h are respectively 0.01-0.4;

[0063] x is the number of oxygen atoms required to satisfy the valence of other elements.

[0064] One of the purposes of this...

no. 2 approach

[0078] The second embodiment of the present invention provides a method for preparing the acrylonitrile catalyst of the first embodiment, specifically comprising the following steps:

[0079] Preparation process: taking the raw materials for preparing the acrylonitrile catalyst, dissolving them in water and mixing them with the carrier to obtain the precursor slurry;

[0080] Drying process: drying the precursor slurry to obtain dry particles;

[0081] Roasting process: roasting the dry particles to obtain a roasted product;

[0082] Preferably, the conductivity of the water is less than 1 μs / cm.

[0083] The invention can make the conductivity of water less than 1 μs / cm by using sand filtration, active carbon adsorption and membrane permeation filtration.

[0084] Specifically, in the preparation step, the soluble active component raw material can be dissolved into a certain amount of pure water with a conductivity less than 1 μs / cm to make a mixed solution, and then mixed ...

no. 3 approach

[0092] The third embodiment of the present invention provides an application of the acrylonitrile catalyst of the first embodiment of the present invention or the acrylonitrile catalyst prepared by the preparation method of the second embodiment in the preparation of acrylonitrile by ammoxidation of propylene.

[0093]Specifically, the acrylonitrile catalyst of the present invention can produce acrylonitrile using a fluidized bed. Acrylonitrile catalyst can be used in continuous production process or batch production process, but it is best to choose continuous production process when using large reactors. In addition, it is desirable to periodically regenerate or activate the acrylonitrile catalyst, for example by blowing air at a certain temperature to achieve this.

[0094] The reactants required to prepare acrylonitrile by using the acrylonitrile catalyst of the present invention are oxygen, ammonia, propylene and their mixtures. The required oxygen can be pure oxygen or ...

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides an acrylonitrile catalyst as well as its preparation method and application. The acrylonitrile catalyst comprises a metal oxide represented by the following general formula (1), Bi a Fe b Ni c Mg d Ce e A f B g C h Mo 12 o x (1) Among them: A is selected from one or more than two elements in the group consisting of lithium, sodium, potassium, rubidium, and cesium; B is selected from one or two elements in the group consisting of praseodymium, europium, terbium, and dysprosium more than one element; C is selected from one or two elements in the group consisting of vanadium and cadmium; a, b, c, d, e, f, g and h represent the number of atoms of each element; a is 1.2 ~3.0; b is 1.0~2.7; c is 3~8; d is 0.3~1.6; e is 0.4~1.8; the contents of f, g and h are 0.01~0.4 respectively; x is used to meet the valence of other elements number of oxygen atoms. The acrylonitrile catalyst of the present invention has the following effects: 1) it can meet the requirement of high catalyst load of an industrial expansion device; 2) it reduces the amount of carbonyl compounds acrolein and acrylic acid produced, and improves the operating cycle of the device.

Description

technical field [0001] The invention relates to an acrylonitrile catalyst, a preparation method and application thereof, and belongs to the field of catalysts. Background technique [0002] Acrylonitrile (AN) is a raw material monomer for synthetic fiber acrylic fibers, and is also a raw material for thermoplastic synthetic resins such as ABS and SAN, nitrile rubber, adiponitrile, acrylamide and other derivatives, and is one of the important products of petrochemical industry . The process technology of propylene ammoxidation to produce acrylonitrile has become increasingly mature, and the development of acrylonitrile catalysts with excellent performance is a hot spot in the acrylonitrile industry. [0003] Regarding the stability of the catalyst, the current catalyst can run continuously for 4-5 years in the fluidized bed reactor without the need to be replaced as a whole, which is significantly improved compared to the past, which can only be used for 1-1.5 years and need...

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): B01J23/887B01J35/10C07C253/26C07C255/08
CPCB01J23/887B01J35/10C07C253/26C07C255/08Y02P20/52B01J23/8876B01J35/023B01J35/1042B01J37/0201B01J37/08C07C255/06
Inventor 王立才
Owner YINGKOU XIANGYANG CATALYST
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