主权项 |
1. A process for a one-step conversion of a pre-treated lignin feedstream that has been pre-treated by steam explosion, hydrolysis and fermentation into a converted lignin stream, the process comprised of:
a. combining in a lignin conversion vessel: the pre-treated lignin feedstream, water supplied from the group consisting of the pre-treated lignin feedstream, a source other than the pre-treated lignin feedstream and mixtures thereof, hydrogen having a hydrogen pressure which at 25° C. is in the range of 21.7 to 104.5 bar, and a first catalyst comprising an elemental metal catalyst, and b. maintaining the combination in the lignin conversion vessel at a first temperature in the range of 245° C. to 300° C. for a time sufficient to create a converted lignin stream, wherein the pre-treated lignin feedstream comprises lignin, cellulose and water wherein the ratio of moles of hydrogen to moles of lignin and cellulose is at least 0.5 and wherein the lignin of the pre-treated lignin feedstream is present as a solid. |