Application of mo-based catalyst loaded by unreduced or partially reduced polymetallic oxide in preparation of organic chemical product with lignin

A supported catalyst and multi-metal technology, which can be used in metal/metal oxide/metal hydroxide catalysts, organic chemistry, preparation of oxygen-containing compounds, etc., and can solve problems such as difficulty in decomposition

Inactive Publication Date: 2018-03-06
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since lignin is an extremely complex network polymer with a stable chemical structure, it is very difficult to decompose it into small molecules; in addition, lignin also contains a large number of functional groups, and the small mole

Method used

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  • Application of mo-based catalyst loaded by unreduced or partially reduced polymetallic oxide in preparation of organic chemical product with lignin
  • Application of mo-based catalyst loaded by unreduced or partially reduced polymetallic oxide in preparation of organic chemical product with lignin
  • Application of mo-based catalyst loaded by unreduced or partially reduced polymetallic oxide in preparation of organic chemical product with lignin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] to Mo 2 C / Cu-MgAlO x As an example, take Cu(NO 3 ) 2 ·3H 2 O,Mg(NO 3 ) 2 ·6H 2 O,Al(NO 3 ) 3 9H 2 O is dissolved in water to prepare a mixed solution, and the mixed solution and NaOH solution are added dropwise to the sodium carbonate solution to prepare a precipitate containing three elements of Cu, Mg, and Al, and the precipitate can be calcined to obtain multi-element metal oxidation CuMgAlO x ; Weigh ammonium heptamolybdate and dissolve it in ammonia water, then impregnate it into multi-element metal oxide CuMgAlO with equal volume x Above, after drying in an oven at 120 °C for 12 h, the catalyst precursor was subjected to a temperature-programmed carbonization reaction, and the specific reaction process was as follows: 2 In the atmosphere, 0.5g of the precursor was placed in a quartz reaction tube and the temperature was raised to 350°C and kept for 12h. The gas was then switched to 15% CH by volume 4 / H 2 , the temperature was raised to 590°C, kept f...

Embodiment 2

[0058] The preparation method of the catalyst is the same as in Example 1, and the difference from Example 1 is that the concentration of ammonium molybdate in the impregnating solution can be changed, or catalysts with different loads can be obtained through multiple impregnations. Such as the loading of Mo is respectively 1wt%, 5wt%, 10wt%, 15wt%, 20wt%, 30wt%, 50wt% and 80wt% Mo 2 C / Cu-MgAlO x catalyst.

Embodiment 3

[0060] Catalyst preparation method is with embodiment 1, and difference with embodiment 1 is that the support CuMgAlO of catalyst is x Replaced with SrTiO 3 , CaTiO 3 , MgAl 2 o 4 or NiAl 2 o 4 , and the obtained catalysts are denoted as Mo 2 C / SrTiO 3 、Mo 2 C / CaTiO 3 、Mo 2 C / MgAl 2 o 4 and Mo 2 C / Ni-Al 2 o 4 .

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Abstract

The invention provides application of a mo-based catalyst loaded by an unreduced or partially reduced polymetallic oxide in preparation of an organic chemical product with lignin. The application comprises the steps of after the lignin, the catalyst and a reaction solvent are mixed, adding a mixture into a sealed reaction container, introducing gas into the container, increasing the temperature at230-350 DEG C, stirring the mixture and making the mixture react for 0.5-12 h, after reaction, filtering out the catalyst, conducting rotary evaporation, and obtaining the liquid product. The application of the mo-based catalyst loaded by the unreduced or partially reduced polymetallic oxide in preparation of the organic chemical product with the lignin has the advantages that the catalyzing process has a high yield of product, on the optimized reaction condition, the total mass yield of a micromolecule organic product reaches 349%, which is because solvent molecules and lignin depolymerizedsmall molecules are combined further to generate useful molecules such as ethyl caproate, ethyl cis-3-hexenoate, 4-ethyl cis-3-hexenoate, ethyl 3-methylvalerate, 3-ethyl trans-2-octenoate and ethyl caprylate, the product contains aromatic compounds such as monophenol applied to industry in large amounts, the additional value of the catalyst is high, and the catalyst has a good industrial application prospect.

Description

technical field [0001] The present invention relates to the method for conversion of biomass to liquid fuel and organic chemicals, more specifically, relates to the catalytic decomposition of lignin into compounds including alcohols, ethers, benzyl alcohols, phenols, and single-ring aromatic compounds Process of organic chemicals. Background technique [0002] In recent years, due to the depletion of non-renewable resources such as coal, oil, and natural gas, the development and utilization of renewable resources has become an urgent task for us. Biomass resources are the most extensive renewable resources in the world, including cellulose, hemicellulose and lignin, among which cellulose and hemicellulose have been widely used, and account for more than 25% of the total biomass. Lignin has not been widely used so far, not only causing waste of resources, but also causing environmental pollution. [0003] Lignin conversion technology has been studied a lot, and the reported...

Claims

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Application Information

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IPC IPC(8): C07C27/00C07C29/00C07C31/02C07C33/025C07C33/20C07C1/20C07C15/02C07C37/00C07C39/02C07C41/01C07C43/23C07C67/00C07C69/22C07C69/533C07G1/00B01J27/22B01J23/885B01J27/19B01J27/24
CPCB01J23/8872B01J27/19B01J27/22B01J27/24C07C1/20C07C27/00C07C29/00C07C37/004C07C41/01C07C67/00C07G1/00C07C31/02C07C33/025C07C33/20C07C15/02C07C39/02C07C43/23C07C69/22C07C69/533Y02P20/10
Inventor 李永丹闫飞
Owner TIANJIN UNIV
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