A catalyst for preparing methacrolein by oxidation of isobutylene and its preparation and application

A technology of methacrolein and isobutylene, which is applied in the field of isobutene oxidation to prepare methacrolein catalyst and its preparation and application, and can solve the problems of catalyst activity and selectivity decline, catalyst overheating, sublimation loss of active components, etc.

Active Publication Date: 2022-04-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the catalyst for the reaction of isobutene oxidation to methacrolein is mainly Mo-Bi-Fe-Co composite oxide catalyst. This composite metal catalyst has two problems that are difficult to overcome. One is that the oxidation of isobutene to methacrolein is an exothermic process. reaction, the traditional Mo-Bi-Fe-Co composite oxide catalyst has a small specific surface area of ​​3-20m 3 / g, the specific surface of the catalyst is small and the active components are too concentrated, which will easily lead to local overheating of the catalyst during reaction, which will lead to the sublimation loss of the active component Mo in the catalyst, resulting in a decrease in catalyst activity and selectivity

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1.4g ammonium molybdate was dissolved in 8.0g water to obtain solution A;

[0021] 0.5g bismuth nitrate, 0.3g iron nitrate, 1.6g cobalt nitrate, 0.01g nickel nitrate, 0.05g cesium nitrate, 0.01g potassium nitrate were dissolved in 2.0g 10wt% nitric acid aqueous solution to obtain solution B;

[0022] 40g of alumina and 50g of water were evenly stirred at 45°C to obtain solution C.

[0023] Add solution B and solution A to solution C at the same time, stir evenly to obtain solution D.

[0024] Solution D and 6 g of spherical silica were stirred and mixed uniformly to obtain solution E.

[0025] Stir and age solution E for 0.1-24 hours, dry at 90-110°C for 3-24 hours, and dry at 180-300°C for 3-6 hours to obtain a solid powder, then roast the solid powder at 500°C for 3.5 hours, and analyze it by scanning electron microscope and BET specific surface area , to obtain a specific surface area of ​​122m 3 / g of core-shell catalysts.

[0026] Take 1ml of core-shell catalys...

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

A method for preparing methacrolein catalysts for the oxidation of isobutylene, using precursor solutions of molybdenum, bismuth, cobalt, nickel, iron, manganese and basic metals and carrier 1 to fully mix to form a slurry, and then mix the obtained The slurry and the carrier 2 are fully mixed and roasted to obtain a catalyst with a core-shell morphology. The catalyst with this morphology solves the technical problems of local overheating of the catalyst, sublimation loss of the active component Mo, and deep oxidation during the oxidation process. At the same time, the morphology The catalyst has good mechanical strength, good hydrothermal stability, high selectivity to products, and good industrial application value.

Description

technical field [0001] The present invention relates to a preparation method for the preparation of methacrolein catalyst for the oxidation of isobutene, in particular to the method of fully mixing the precursor solution of molybdenum, bismuth, cobalt, nickel, iron, manganese and basic metal with the carrier 1 to form a slurry , and then fully mixed the obtained mixed slurry with the carrier 2 and then roasted to obtain a catalyst with a core-shell morphology. Background technique [0002] Methacrolein (MAL) is an important intermediate for the synthesis of methacrylic acid (MAA) and methyl methacrylate (MMA), and is also an important fine chemical intermediate for the synthesis of pharmaceuticals and pesticides. Isobutene oxidation to MAL is a key step in the preparation of MAA and MMA (referred to as isobutene oxidation). Compared with the traditional ACH method, the isobutene oxidation method for the preparation of MAA has better technical and economical efficiency. This ...

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): B01J23/887B01J35/10C07C45/35C07C47/22
CPCB01J23/8876B01J23/002B01J35/008B01J35/0093B01J35/1019C07C45/35B01J2523/00C07C47/22B01J2523/13B01J2523/15B01J2523/31B01J2523/41B01J2523/54B01J2523/68B01J2523/842B01J2523/845B01J2523/847
Inventor 高爽张毅吕迎
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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