An integrated process for the production of ethanol from woody plant
material is provided, the process comprising: contacting a continuous
flow of the plant material with a counter-current continuous flow of an
aqueous ethanol solution at elevated temperature and pressure to provide
plant material depleted of lignin; removing ethanol from the
lignin-depleted plant material; contacting a continuous flow of the
lignin-depleted plant material with water at elevated temperature and
pressure to solubilize xylose within the plant material; and hydrolyzing
cellulose present in the plant material to form glucose, which in turn is
fermented to produce ethanol.