NOVELTY - An alcohol is produced by contacting a biomass (102) containing cellulose fibers and lignin ( greater than or equal to 15 wt.%) in digester(s) with a cooking liquor at 100-230 degrees C for 0.25-4 hours to provide a pulp stream having a pulp having a lignin content (5-20 wt.%) and a chemical liquor stream containing sodium compounds; and washing the pulp stream with a water stream to remove portion(s) of lignin and hemicellulosic material and producing washed pulp stream.    USE - Process of producing alcohol.    ADVANTAGE - The process reduces solids size and increases solids content of the washed pulp stream thus having improved yield.    DETAILED DESCRIPTION - An alcohol is produced by:    (A) providing a biomass (102) containing cellulose fibers and lignin ( greater than or equal to 15 wt.%);    (B) contacting the biomass in digester(s) with a cooking liquor at 100-230 degrees C for 0.25-4 hours to provide a pulp stream having a pulp having a lignin content (5-20 wt.%) and a chemical liquor stream containing sodium compounds;    (C) washing the pulp stream with a water stream to remove portion(s) of lignin and hemicellulosic material and producing washed pulp stream;    (D) hydrolyzing the washed pulp stream by treating the streams with an enzyme solution comprising cellulases and optionally xylanases at a pH of 3-7 at 30-90 degrees C to produce a hydrolyzate having fermentable sugar (4-30 wt.%);    (E) fermenting the hydrolyzate in the presence of a microorganism at 25-55 degrees C and pH of 4-6 to produce a 2-18C alcohol stream; and    (F) recovering alcohol(s) from the alcohol stream.    The cooking liquor has (wt.%) active alkali (5-25) and a sodium carbonate (less than 3.5). The cooling liquor and biomass has a ratio of 2-6. The cooking liquor comprises (wt.%) sodium hydroxide (1-20), sodium sulfide (0-20), water (balance), and anthraquinone, sodium borate and/or polysulfides (0-3).    DESCRIPTION OF DRAWING(S) - The drawing is a flowchart of a process of producing alcohol from biomass.    Biomass (102)    Lime (152)    Cooking liquor feed stream (154)    Chemical recycle stream (158)    Aqueous effluent recycle stream (186)