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

Method for preparing p-hydroxycinnamate by catalyzing lignin alcoholysis through enzymatic hydrolysis lignin-based hierarchical porous carbon-loaded molybdenum oxide

A lignin-based, molybdenum oxide technology, used in metal/metal oxide/metal hydroxide catalysts, preparation of organic compounds, catalyst activation/preparation, etc., can solve the difficulty of catalyst recovery, catalyst and product separation, etc. problem, to achieve the effect of low cost, high price and good matching

Active Publication Date: 2022-07-05
SOUTH CHINA UNIV OF TECH
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method selectively depolymerizes lignin under mild conditions to prepare methyl p-hydroxycinnamate, but using copper metal salt as a homogeneous catalyst has the problems of difficult separation of catalyst and product and difficult recovery of catalyst.

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
  • Method for preparing p-hydroxycinnamate by catalyzing lignin alcoholysis through enzymatic hydrolysis lignin-based hierarchical porous carbon-loaded molybdenum oxide
  • Method for preparing p-hydroxycinnamate by catalyzing lignin alcoholysis through enzymatic hydrolysis lignin-based hierarchical porous carbon-loaded molybdenum oxide
  • Method for preparing p-hydroxycinnamate by catalyzing lignin alcoholysis through enzymatic hydrolysis lignin-based hierarchical porous carbon-loaded molybdenum oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Preparation of NC Carrier

[0040] Weigh 0.6g of industrial enzymatically hydrolyzed lignin (Shandong Longli Group), 0.1261g of melamine powder with a purity of 99.5%, and 1.4814g of ZnCl with a purity of 99% 2 Solid, 0.6360 g of KOH solid with a purity of 99%, the above four samples were dissolved in 50 mL of absolute ethanol, and ultrasonically treated for 0.5 h. After sonication, add 3g Mg(OH) 2 The powder and 50 mL of anhydrous ethanol were sonicated again for 0.5 h. Then, it was heated and stirred in an oil bath at 60 °C for 5 h, and after the end, the solvent was removed in a rotary evaporator and ground to obtain a yellow-brown powder, that is, the NC precursor. The NC precursor was calcined in a tube furnace at 800 °C for 140 min under an inert gas atmosphere, and cooled to room temperature naturally. Finally, pickle with 1mol / L nitric acid for 2h, and wash with water until neutral after pickling. After dry grinding, a black powdery NC carrier was...

Embodiment 2

[0041] Example 2: Preparation of 10 wt.% Mo / NC catalyst

[0042] Weigh 0.2142g (NH 4 ) 6 Mo 7 O 24 ·4H 2 O, fully dissolved in 20 mL of deionized water, added 1 g of the NC carrier prepared in Example 1, soaked for 12 h, and dried at 80 °C for 12 h. In a tube furnace, N 2 The Mo / NC catalyst was obtained by calcining at 600 °C for 5 h under the atmosphere, and the loading of Mo was 10 wt.%.

Embodiment 3

[0043] Example 3: Preparation of 2.5 wt.% Mo / NC catalyst

[0044] Weigh 0.0480g (NH 4 ) 6 Mo 7 O 24 ·4H 2 O, fully dissolved in 20 mL of deionized water, added 1 g of the NC carrier prepared in Example 1, soaked for 12 h, and dried at 80 °C for 12 h. In a tube furnace, N 2 The Mo / NC catalyst was obtained by calcining at 600 °C for 5 h in an atmosphere with a Mo loading of 2.5 wt.%.

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 discloses a method for preparing p-hydroxycinnamate by catalyzing lignin alcoholysis through enzymatic hydrolysis lignin-based hierarchical porous carbon loaded molybdenum oxide, which comprises the following steps of: reacting lignin serving as a raw material, the enzymatic hydrolysis lignin-based hierarchical porous carbon loaded molybdenum oxide serving as a catalyst and small organic molecular alcohol serving as a reaction medium in an inert atmosphere at the temperature of 160-220 DEG C for 2-8 hours to obtain p-hydroxycinnamate. Selective conversion of lignin is realized to obtain p-hydroxycinnamate; the total yield of the monophenol compound is 13.37-17.66 wt.%, the yield of the ethyl p-hydroxycinnamate is 8.74-12.92 wt.%, the selectivity is 63.85-74.93%, the selectivity is good, the comprehensive performance is excellent, the safety is good, lignin is used as a carrier and an enzymolysis object, and the utilization amount of the lignin is large.

Description

technical field [0001] The invention relates to high-value utilization of lignin, in particular to a study on the preparation of p-hydroxycinnamate by enzymatic hydrolysis of lignin-based hierarchical porous carbon-supported molybdenum oxide catalyzed by alcoholysis of lignin; it belongs to a high-efficiency resource of renewable biomass field of chemical utilization. Background technique [0002] Lignin is a three-dimensional amorphous polymer based on three different methoxybenzene propylene monomers connected by several specific chemical bonds, mainly composed of C, H, O and other elements. One of the difficulties in the value utilization of lignin is to break the bonds between the units to produce aromatic monomers. [0003] At present, the main route of industrial production of aromatic compounds is based on petroleum. Petroleum as a non-renewable resource has limited reserves, and the use of petroleum will release carbon from deep underground into the atmosphere, cau...

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): C07C67/00C07C69/732B01J37/08B01J37/02B01J35/10B01J27/24B01J23/28
CPCB01J27/24B01J37/084B01J37/0201B01J23/28C07C67/00B01J35/60C07C69/732
Inventor 李雪辉黄家荣刘思洁龙金星
Owner SOUTH CHINA UNIV OF TECH
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