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

A kind of methyl acrylate hydrogenation methyl propionate catalyst and its preparation and application

A technology for preparing methyl acrylate and methyl propionate, which is applied in catalyst activation/preparation, carboxylate preparation, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of low selectivity of methyl propionate, High reaction temperature, difficult separation and other problems, to achieve the effect of good dispersion, low reaction temperature and low pressure

Active Publication Date: 2021-03-16
SOUTHWEST RES & DESIGN INST OF CHEM IND
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of this present situation that existing methyl acrylate hydrogenation prepares methyl propionate catalyst mostly is homogeneous catalyst, its separation difficulty, high cost, methyl propionate selectivity is low, reaction temperature is high. Catalyst for producing methyl propionate by hydrogenation of methyl acrylate and its preparation method and application

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 methyl acrylate hydrogenation methyl propionate catalyst and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation process of the present embodiment methyl acrylate hydrogenation methyl propionate catalyst is as follows:

[0026] 1. Mix cerium nitrate and benzyl alcohol according to the molar ratio of 1:4, heat and reflux at 90°C for 2 hours after mixing evenly, and continue to reflux after water removal treatment (after about 1 hour of reflux process, open for about 10 minutes). 3h, centrifuged and washed 3 times, dried at 100°C for 4h, and calcined at 350°C for 4h to obtain a cerium oxide carrier;

[0027] 2. Take a certain amount of RuCl 3 ·3H 2 O, Ni(NO 3 ) 2 , Cu(NO 3 ) 2 Prepare an aqueous solution, Ru: (Cu+Ni) molar ratio=1:0.4, Cu:Ni molar ratio=1:2, the mixed solution of Ru, Cu and the cerium oxide carrier after roasting in step 1 carry out equal-volume impregnation for 4h, After impregnation, it was dried at 90°C for 4h and calcined at 400°C for 12h; the Ru loading was 0.4% by mass.

[0028] In the catalyst of this embodiment, the percentage content ...

Embodiment 2

[0030] The preparation process of the present embodiment methyl acrylate hydrogenation methyl propionate catalyst is as follows:

[0031] 1. Mix cerium nitrate and benzyl alcohol according to the molar ratio of 1:6. After mixing evenly, heat and reflux at 100°C for 4h. After dehydration treatment, continue to reflux for 5h, centrifuge and wash 3 times, dry at 110°C for 6h, and roast at 300°C. After 12h, the cerium oxide carrier was obtained;

[0032] 2. Take a certain amount of Pd(NO 3 ) 2 , Ni(NO 3 ) 2 Prepare an aqueous solution with a molar ratio of Pd:Ni=1:0.3, impregnate the mixed solution of Pd and Ni with the cerium oxide support calcined in step 1, dry at 90°C for 12h, and calcinate at 450°C for 12h; wherein the Pd load is mass Percentage 0.3%.

[0033] In the catalyst of this example, the percentage content of active component Pd is 0.3%, the percentage content of Ni is 0.05%, and the rest is carrier. The resulting catalyst is designated as D2.

Embodiment 3

[0035] The preparation process of the present embodiment methyl acrylate hydrogenation methyl propionate catalyst is as follows:

[0036] 1. Mix cerium nitrate and benzyl alcohol according to the molar ratio of 1:8. After mixing evenly, heat and reflux at 90°C for 3h. After dehydration treatment, continue to reflux for 8h, centrifuge and wash 3 times, dry at 120°C for 20h, and roast at 350°C. After 8h, the cerium oxide carrier was obtained;

[0037] 2. Take a certain amount of H 2 PtCl 6 ·6H 2 O, Cu(NO 3 ) 2 Prepare an aqueous solution with a molar ratio of Pt:Cu=1:0.2, impregnate the mixed solution of Pt and Ni with the calcined cerium oxide support in step 1, dry at 100°C for 24h, and calcinate at 350°C for 8h; wherein the Pt load is the mass Percentage 0.6%.

[0038] In the catalyst of this example, the percentage content of active component Pt is 0.6%, the percentage content of Cu is 0.04%, and the rest is carrier. The resulting catalyst is designated D3.

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
Login to View More

Abstract

The invention provides a catalyst for preparing methyl propionate by hydrogenating methyl acrylate, and belongs to the technical field of hydrogenation catalysts. The catalyst comprises, by the mass percentage, 0.05-0.5% of an active component, 0.02-0.5% of an auxiliary agent and the balance being a carrier, wherein the active component is one or more of precious metals Ru, Pd and Pt, the auxiliary agent is one or two of Ni and Cu, and the carrier is cerium oxide CeO2. The invention also provides a preparation method and application of the catalyst. The catalyst for preparing methyl propionateby hydrogenating methyl acrylate is low in reaction temperature and pressure, the conversion rate of methyl acrylate is larger than or equal to 99%, the selectivity of methyl propionate is larger than or equal to 99%, and the catalyst and a reaction system are easy to separate after reaction and can be recycled for multiple times.

Description

technical field [0001] The invention belongs to the technical field of hydrogenation catalysts, in particular to a catalyst for producing methyl propionate by hydrogenation of methyl acrylate and its preparation and application. Background technique [0002] Methyl propionate is a kind of ester raw material with many uses. It is often used as extractant, food or cosmetic fragrance, plasticizer, and also as an intermediate for the production of other chemicals, such as methyl methacrylate, Propyl propionate etc. Methyl propionate is usually obtained by esterification of propionic acid and methanol. In recent years, with the continuous research on the process of producing methyl methacrylate from methyl acetate, as a part of it, methyl acrylate is selectively hydrogenated to produce methyl propionate. Esters have also received much attention. [0003] It can be seen from the molecular structure of methyl acrylate that it contains both C=C bonds and C=O bonds, and the C=C bon...

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): B01J23/89B01J37/18B01J37/10B01J37/08B01J37/02C07C67/303C07C69/24
CPCB01J23/002B01J23/894B01J37/0201B01J37/088B01J37/10B01J37/18B01J2523/00C07C67/303B01J2523/17B01J2523/3712B01J2523/821B01J2523/847B01J2523/824B01J2523/828C07C69/24
Inventor 董玲玉宋元江李扬李文龙许红云夏伟胡玉容
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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