Lignin to Adipic Acid
Lignin, a heterogeneous mixture made up of aromatic polymers, is a major co-product produced from second generation cellulosic ethanol plants. Currently lignin is being burned as a low energy fuel; however, since the number of second generation cellulosic ethanol plants in the U.S. is expected to increase over the next several years, a more profitable alternative for lignin is desired. The National Renewable Energy Lab (NREL) has been working towards developing a process that converts lignin to adipic acid, a significant dicarboxylic acid that is used to produce nylon-6,6. This process utilizes ...
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