Use of catalyst prepared with a subgroup VI element for the production of organic chemicals and fuels from lignin
AssigneeTianjin University
InventorsYongdan Li, Rui Ma, Xiaolei Ma, Wenyue Hao
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Abstract
A process for the production of organic chemicals and fuels from lignin in the presence of a molybdenum or tungsten based catalyst, comprising mixing the lignin with the catalyst and a solvent in a sealed reactor, introducing an inert gas or hydrogen to the reactor to replace oxygen therein, and heating the sealed reactor to perform a depolymerization reaction at a reaction temperature of above 200° C. to obtain liquid products, which include aromatic compounds, esters, alcohols, monophenols and benzyl alcohols.
Claims6
A process for the production of organic chemicals and fuels from lignin, comprising
- mixing the lignin with a molybdenum based catalyst and a solvent in a sealed reactor,
- introducing an inert gas to the reactor to replace oxygen therein, and
- heating the sealed reactor to perform a depolymerization reaction at a reaction temperature of 230-350° C. for 0.5-12 h to obtain liquid products comprising alcohols, esters, monophenols, benzyl alcohols and arenes;
- wherein the solvent is selected from the group consisting of deionized water, ethanol and a mixture of deionized water and ethanol;
- wherein the molybdenum based catalyst is a supported or an unsupported catalyst comprising molybdenum as an active metal;
- wherein the supported catalyst is expressed as AxBy/C, wherein A represents molybdenum which has a loading amount of 1-80 wt. % of the supported catalyst, B represents carbon, phosphorus or nitrogen, and C represents the support of the catalyst selected from the group consisting of aluminum oxide (Al2O3), activated carbon (AC), silicon dioxide (SiO2), silicon carbide (SiC), zeolites and nano-carbon fiber, 0<x≦2 and 0<y≦3;
- wherein the unsupported catalyst is expressed as AxBy, wherein A represents molybdenum, B represents carbon, phosphorus or nitrogen, 0<x≦2, and 0<y≦3;
- wherein the lignin includes alkali lignin, Klason lignin, milled wood lignin and organosolv lignin;
- wherein the inert gas is nitrogen, argon or helium;
- and
- wherein the mixture of deionized water and ethanol comprises 10-50% of ethanol by volume.
Dependencies are inferred from the claim text.