Biomass dissolved and regenerated ...
Release time：2015-05-19 Browse times：
Among these, lignocellulosic materials have aroused wide public concern due to their potential as starting materials for biofuels and other commodity chemicals. Lignocellulose materials have been reported to be insoluble in many conventional solvents, except some alkali and acid solutions or organic solvents which are corrosive, costly and difficult to recycle. A ‘greener’ alternative for this process would be extremely popular. Recently certain ionic liquids have been shown to dissolve biopolymers, and even raw biomass under relatively mild conditions. Nonetheless, questions remain about the non-degradability of the selected ionic liquids above owing to the imidazolium ring just in case they leak accidentally entering the environment. Here we utilize a kind of biodegradable IL, choline acetate ([ChO][OAc]) to demonstrate the possibility of the partial dissolution and delignification of cornstalk in simple, wild, nontoxic and “green” process.
Innovation and development
Biodegradable ionic liquid choline acetate ( [ChO][OAc] ) firstly shows a highly efficient delignification of cornstalk. Thus, holocellulose in the undissolved residue accounted for 98 % and the lignin content decreased from 13% in cornstalk to 2%. Cellulose membrane could be obtained directly from the IL in simple, wild, nontoxic and “green” process.