Method for completely dissolving and rapidly hydrolyzing cellulose, and uses of said method

Abstract

The invention discloses a method for completely dissolving and rapidly hydrolyzing cellulose, and uses thereof. Cellulose is placed in an acidic aqueous solution with a [H+] concentration of 10−7˜1 M or an alkaline aqueous solution with a [OH−] concentration of 10−7˜1 M as sample A, wherein the volume ratio of solid to liquid is (0.003˜1.05):1. The acidic aqueous solution with a [H+] concentration of 10−7˜1 M or the alkaline aqueous solution with a [OH−] concentration of 10−7˜1 M is heated up to 261˜352 as sample B. Sample A and sample B obtained from step 1 and step 2 are mixed in a reactor to a concentration of cellulose of 0.1%˜35%, the concentration of the mixed solution is adjusted to an acidity of 10−7˜1 M [H+] or an alkalinity of 10−7˜1 M [OH−], and a water density of 587˜997 kg/m3, pressure is set at 6˜584 MPa. The mixture is rapidly heated up to 261˜352 at heating rate of 7.8˜14.8 /s, and then cellulose is dissolved completely in 0.8˜2 sec and hydrolyzed in 5 sec. Using this technique, it is the first time for achieving complete dissolution and rapid hydrolysis of cellulose at a lower temperature, which not only dramatically reduces the cost of hydrolysis but also improves the safety of production and extends the service life of equipment, thus possessing a good application prospect.

Dependencies are inferred from the claim text.