Compositions comprising glucose and hemicellulose and their use

A method for preparing a purified hemicellulose composition comprising:

• providing a lignocellulosic biomass:
• combining the lignocellulosic biomass with water:
• activating the lignocellulosic biomass and water using conditions comprising a temperature and a pressure to form an activated cellulose stream:
• washing the activated cellulose stream to form a washed activated cellulose stream and a soluble extract, wherein the soluble extract comprises hemicellulose;
• and
• purifying the soluble extract to obtain a hemicellulose composition comprising:
• (a) about 20% to about 95% by dry weight of xylan, wherein said xylan comprises about 70% to about 99% of arabinoxylan;
• (b) about 5% to about 60% by dry weight of xylo-oligosaccharide;
• and
• (c) about 0% to about 40% by dry weight of xylose.