Patent ID: 8608970

Claim:
A hardwood pulp liquid hydrolysate conditioning method comprising the steps of: receiving a first extract derived from a quantity of hardwood mix into a first evaporator and outputting a first quantity of vapor and a second extract; hydrolyzing the second extract and outputting a third extract; separating and recovering a quantity of lignin from the third extract and outputting a fourth extract; adjusting a pH of the fourth extract, thereby forming a quantity of solid precipitate and fifth extract; separating the quantity of solid precipitate from the fifth extract; removing a first quantity of acid from the fifth extract within a second evaporator, outputting a second quantity of vapor having the first quantity of acid and outputting a sixth extract; and removing a liquid having a quantity of salt, heavy metals, residual acid, and lignin from the sixth extract and outputting a seventh extract comprising a desalinated solution containing sugar.