TWO-COLUMN REACTOR SYSTEM AND METHOD OF HYDROLYSIS AND DIGESTION OF WOOD CHIPS WITH CHEMICALLY AMPLIFIED WASHING METHOD Russian patent published in 2012 - IPC D21C1/02 D21C3/02 

FIELD: textiles, paper.

SUBSTANCE: reactor column system comprises the first reactor column having an extraction filter for extracting hydrolysate and liquid, the first zone above the extraction filter, which is maintained under conditions that induce the hydrolysis reaction in the cellulosic material, the second zone below the extraction filter, in which the hydrolysis is essentially suppressed, and an inlet fitting for washing liquid below the extraction filter feeding the washing liquid at a temperature below the temperature of hydrolysis. The system also comprises the transport pipeline which has the inlet branch connected to the first reactor column, and the outlet branch is connected to the second reactor column, and the second reactor column comprises an outlet branch for output of liquid that removes part of the liquid from the second reactor column and directs the part of the liquid to the first reactor column or to the transport pipeline.

EFFECT: invention enables to avoid entering cooking chemicals in the cellulosic material in the process of hydrolysis.

56 cl, 1 dwg