US 9,809,522 B2
Selective liquefaction of lignin and biomass in a mixture of sub- and supercritical fluids in absence or presence of heterogeneous catalysts
Alevtina Smirnova, Rapid City, SD (US); Chris Lynde, Rapid City, SD (US); Abu Md Numan-Al-Mobin, Rapid City, SD (US); and Rudresh Bommadihalli Rajappagowda, Rapid City, SD (US)
Assigned to SOUTH DAKOTA BOARD OF REGENTS, Pierre, SD (US)
Filed by South Dakota Board of Regents, Pierre, SD (US)
Filed on Sep. 12, 2016, as Appl. No. 15/263,141.
Claims priority of provisional application 62/217,558, filed on Sep. 11, 2015.
Prior Publication US 2017/0073291 A1, Mar. 16, 2017
Int. Cl. C07C 45/00 (2006.01); C07C 41/00 (2006.01); C07C 41/18 (2006.01); C07C 45/59 (2006.01); C07C 27/00 (2006.01)
CPC C07C 41/18 (2013.01) [C07C 27/00 (2013.01); C07C 45/59 (2013.01)] 19 Claims
 
1. A method comprising:
producing a phenolic product or group of chemically related phenolic products by liquefaction of a biomass or lignin in the presence of a homogenous catalyst in sub-, near-, or supercritical state;
mixing one or more heterogeneous catalysts with sub-, near-, or supercritical water.