Cs-supported silica-based catalyst and preparation method and application thereof

A catalyst, supported technology, applied in molecular sieve catalysts, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of high equipment requirements, easy corrosion, high price of propylene, etc., achieve simple preparation process, maintain catalytic activity, The effect of high catalytic activity

Inactive Publication Date: 2014-05-21
SHANGHAI HUAYI GRP CO
View PDF5 Cites 39 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above production methods have the following disadvantages: the first method uses strong acid, which is easy to corrode and has high requirements for equipment; with the continuous rise of international oil prices, the price of petrochemical product propylene also increases greatly, and the cost rises. The one-step oxidation requires high catalyst per...

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
  • Cs-supported silica-based catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 0.7280g CsNO 3 Dissolve in 12ml of deionized water, and evenly impregnate the solution in 10g of 40-60 mesh SiO 2 Put it on, stir, let it stand for 1 hour, and evaporate excess water in a 60°C water bath. Transfer to a vacuum drying oven, dry at 50°C for 12 hours, and then bake at 450°C for 5 hours in an air atmosphere to prepare the catalyst 5 (wt%) Cs / SiO 2 .

[0036] In a fixed bed reactor, at 390°C, carrier gas flow 50ml / min, methyl acetate: formaldehyde: methanol molar ratio 1:2:2, space velocity 5h -1 , Feed volume 0.03ml / min, catalyst dosage is under the condition of 0.5000g, prepare methyl acrylate, the one-pass conversion rate of methyl acetate is 43.2%, the selectivity of methyl acrylate is 92.1%, the one-pass yield of methyl acrylate was 39.8%.

Embodiment 2

[0038] Weigh 0.7280g CsNO 3 Dissolve in 12ml of deionized water, dip the solution evenly on 10g of 40-60 mesh SBA-15, stir, let it stand for 1 hour, and evaporate excess water in a 60°C water bath. Transfer to a vacuum drying oven, dry at 50°C for 12 hours, and then bake at 450°C for 5 hours in an air atmosphere to prepare catalyst 5 (wt%) Cs / SBA-15.

[0039] In a fixed bed reactor, at 390°C, carrier gas flow 50ml / min, methyl acetate: formaldehyde: methanol molar ratio 1:2:2, space velocity 5h -1 , feed volume 0.03ml / min, catalyst dosage is under the condition of 0.5000g, prepare methyl acrylate, the one-pass conversion rate of methyl acetate is 48.4%, the selectivity of methyl acrylate is 95.0%, the one-pass yield of methyl acrylate was 46.0%.

Embodiment 3

[0041] Weigh 0.7280g CsNO 3 Dissolve in 12ml of deionized water, evenly impregnate the solution on 10g of 40-60 mesh silica prepared by the silica sol method, stir, let stand for 1 hour, and evaporate excess water in a 60°C water bath. Transfer to a vacuum drying oven, dry at 50°C for 12 hours, and then bake at 450°C for 5 hours in an air atmosphere to prepare catalyst 5 (wt%) Cs / Silica gel (silicon dioxide prepared by silica sol method).

[0042] In a fixed bed reactor, at 390°C, carrier gas flow 50ml / min, methyl acetate: formaldehyde: methanol molar ratio 1:2:2, space velocity 5h -1 , feed volume 0.03ml / min, catalyst dosage is under the condition of 0.5000g, prepare methyl acrylate, the one-pass conversion rate of methyl acetate is 28.9%, the selectivity of methyl acrylate is 94.8%, the one-pass yield of methyl acrylate was 27.4%.

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

No PUM Login to view more

Abstract

The invention provides a Cs-supported silica-based catalyst. One of SBA-15, SiO2 or silicon dioxide prepared by a silica sol method is used as a carrier, the support is selected from one of Cs salt and a mixture of Cs and modified elements, the catalyst is prepared by a dipping method, the Cs content is 0.1wt%-10wt%, and the content of the modified elements is 0-2wt%. Meanwhile, the invention further provides a preparation method of the Cs-supported silica-based catalyst and application of the Cs-supported silica-based catalyst to the process of preparing methyl acrylate by catalyzing condensation reaction of methyl acetate and a methanal gas phase. The prepared catalyst is capable of realizing the aldol condensation of the methyl acetate and the methanal gas phase under proper conditions so as to prepare the methyl acrylate, wherein the activity of the Cs/SBA-15 catalyst is higher than that of other Cs-supported silica-based catalysts, and the selectivity on the methyl acrylate is good.

Description

technical field [0001] The invention relates to a Cs-loaded silicon-based catalyst and a preparation method thereof, as well as the application of catalyzing the gas-phase condensation reaction of methyl acetate and formaldehyde to prepare methyl acrylate. Background technique [0002] Methyl acrylate, molecular formula C 4 h 6 o 2 , a colorless liquid with a pungent smell, slightly soluble in water, soluble in ethanol and ether, is an important intermediate in organic synthesis and an organic monomer in polymer synthesis, widely used in the copolymerization of rubber, prepared with A new type of rubber with high temperature resistance and oil resistance; it can be copolymerized with methyl methacrylate and olefins to obtain high-performance coatings; it can be polymerized with acrylonitrile to improve the spinnability, dyeability and plasticization of polyacrylonitrile fibers; In addition, methyl acrylate also has applications in chemical fibers, leather, resins, coating...

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
IPC IPC(8): B01J23/04B01J29/035C07C69/54C07C67/343
Inventor 王振旅颜见标张文祥张春雷唐勇宁春利张怡
Owner SHANGHAI HUAYI GRP CO
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