Preparation method of modified carrier, composite metal oxide catalyst and acrylic acid

A composite metal and oxide technology, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, preparation of organic compounds, physical/chemical process catalysts, etc., can solve the problem that the catalyst cannot be catalyzed efficiently for a long time, and achieve the depth of inhibition Oxidation side reaction, high activity, good modification effect

Inactive Publication Date: 2018-07-27
SHANGHAI DONGHUA ENVIRONMENT ENG +1
View PDF11 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the existing catalysts cannot efficiently catalyze the oxidation of acrolein to produce acrylic acid for a long time, so as to provide a catalyst that does not change the activity of the catalyst in the direction of the catalyst bed, even in the presence of "hot spots". Catalyst that can catalyze the oxidation of acrolein to produce acrylic acid for a long time and efficiently

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
  • Preparation method of modified carrier, composite metal oxide catalyst and acrylic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] This embodiment provides a composite metal oxide catalyst. The preparation method is specifically as follows: heating 1500 mL of deionized water to 80° C., and adding 500 g of ammonium paramolybdate, 44.3 g of ammonium paratungstate, 96.7 g of ammonium metavanadate, and 1.91g potassium nitrate, 7.6g cesium nitrate, stir until completely dissolved to obtain solution A, add 300mL deionized water in another container, under heating and stirring conditions, add 91.7g copper nitrate, 10.2g antimony trioxide and 37.7 g titanium dioxide to obtain solution B, and drop solution B into solution A to obtain slurry C. Take out 270 mL of slurry C, immerse 1500 g of inert alumina carrier in slurry C, dry, and calcinate at 450° C. for 5 hours to obtain a modified carrier. The remaining slurry C was evaporated to dryness, dried at 120°C, and pulverized into 80 mesh particles, which were loaded on the surface of the modified carrier by centrifugal flow coating, and calcined at 390°C for ...

Embodiment 2

[0067] This embodiment provides a composite metal oxide catalyst. The preparation method is specifically as follows: heating 1500 mL of deionized water to 80° C., and adding 500 g of ammonium paramolybdate, 95 g of ammonium paratungstate, 96.7 g of ammonium metavanadate, 3.6 g potassium nitrate, 13.9g strontium nitrate, stir until completely dissolved to obtain solution A, add 300mL deionized water in another container, under heating and stirring conditions, add 137.6g copper nitrate, 13.6g antimony trioxide and 75.4g Titanium dioxide, solution B is obtained, and solution B is added dropwise to solution A to obtain slurry C. After raising the temperature to 100°C and keeping the temperature constant for 2 hours, stop heating, take out 270mL slurry C, immerse 1500g of inert alumina carrier in slurry C, dry, and calcinate at 550°C for 6 hours to obtain a modified support. The remaining slurry C was evaporated to dryness, dried at 120°C, and pulverized into 80 mesh particles, and ...

Embodiment 3

[0070] This embodiment provides a composite metal oxide catalyst. The preparation method is specifically as follows: heat 1500 mL of deionized water to 80°C, and add 500 g ammonium paramolybdate, 114 g ammonium paratungstate, 96.7 g ammonium metavanadate, and 5.7 g potassium nitrate, 21.8g strontium nitrate, stir until completely dissolved to obtain solution A, add 300mL deionized water in another container, under heating and stirring conditions, add 183.5g copper nitrate, 20.4g antimony trioxide and 113g titanium dioxide , Obtain solution B, drop solution B into solution A, obtain slurry C. The temperature was raised to 100°C and kept at a constant temperature for 30 minutes, then the heating was stopped, 270mL of slurry C was taken out, 1500g of inert alumina carrier was immersed in slurry C, dried, and calcined at 500°C for 5 hours to obtain a modified carrier. The remaining slurry C was evaporated to dryness, dried at 120°C, and pulverized into 80 mesh particles, and loaded...

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
diameteraaaaaaaaaa
lengthaaaaaaaaaa
load ratioaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of catalyst preparation, and particularly relates to a preparation method of a modified carrier, a composite metal oxide catalyst and acrylic acid. The modified carrier is a composite metal oxide with the general formula of Mo12VaAbBcCdDeEfFgOn impregnated and adsorbed on an inert carrier; the catalyst is formed by spraying the composite metal oxide with the general formula of Mo12VaAbBcCdDeEfFgOn on the modified carrier surface. Compared with an ordinary molybdenum-vanadium catalyst, the catalyst has more catalyst active sites; the catalyst activity is higher; meanwhile, the concentration of local reaction active sites of the catalyst is also reduced; the possibility that the catalyst generates a large amount of heat in local regions is effectively avoided; the sublimation loss of molybdenum elements in the catalyst is greatly inhibited to a certain degree; the catalyst activity is stabilized; the service life of the catalyst is prolonged.

Description

Technical field [0001] The invention belongs to the technical field of catalyst preparation, and specifically relates to a preparation method of a modified carrier, a composite metal oxide catalyst and acrylic acid. Background technique [0002] In recent years, the development of oil and natural gas has led to the rapid development of fine chemicals. Acrylic acid and its esters, as one of the important fine chemical raw materials, are widely used in coatings, building materials, adhesives, textiles, leather, papermaking, oil extraction and water treatment, etc. field. With the development of construction, electronics, automobile and other industries, the demand and production capacity of acrylic acid continue to increase. [0003] At present, the mainstream technical route for acrylic acid production is still the industrialized two-step selective oxidation process of propylene in the 1970s, that is, acrolein is further selectively oxidized to acrylic acid after the partial oxidat...

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 Applications(China)
IPC IPC(8): B01J23/887B01J23/888B01J27/057C07C51/235C07C57/055
CPCB01J23/002B01J23/8877B01J23/8885B01J27/0573B01J2523/00C07C51/235B01J2523/13B01J2523/17B01J2523/24B01J2523/31B01J2523/47B01J2523/53B01J2523/55B01J2523/68B01J2523/69B01J2523/22B01J2523/845B01J2523/25B01J2523/48C07C57/04
Inventor 李鹏王亮黄勇郭薇赵小平郭耀星
Owner SHANGHAI DONGHUA ENVIRONMENT ENG
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