| abstract |
Separation and recovery of a lignin derivative effective for separating a lignin derivative from a mixed system containing a lignin derivative having a 1,1-diphenylpropane unit and / or a unit derived from the 1,1-diphenylpropane unit Provide technology. The lignin derivative is obtained by contacting a lignin derivative having a 1,1-diphenylpropane unit and / or a unit derived from the 1,1-diphenylpropane unit with a metal oxide in a liquid medium. Is held by the metal oxide and separated. [Selection figure] None |