Biomass hydrolyzing process of preparing reductive monosaccharide

[0028] Add 400 grams of biomass raw material in the hydrolysis reactor; with 3wt% HCl and 1wt% FeCl 2 The aqueous solution is a hydrolyzate, which is added to the acid tank, pressed into the hydrolysis reactor by high-pressure nitrogen, and heated to 110°C by means of external electric heating, and the collection begins. The resulting solution is marked as I, volume It is 1620ml. Then the reaction temperature was raised to 160° C., and the second collection was made. The resulting solution was marked as II, and the volume was 3130 ml. The washing liquid collected after washing the hydrolyzed residue is marked as III and has a volume of 1960 ml. The hydrolysis reaction time is 20 minutes from the time when the temperature rises to 110° C. to the completion of the second part of the collection. Solution I is the product of this hydrolysis, and its sugar concentration is 3.5wt%. Solution II and washing solution III are used as circulating fluid to participate in the hydrolysis of

[0030] In addition to adding 83ml of concentration to be 9.86mol / LHCl and 10ml13wt%FeCl in the circulation liquid obtained by embodiment 1 through the acid tank 2 Except for the aqueous solution, other process conditions are the same as in Example 1, and the concentration of sugar in the product obtained is 5.5 wt%.

[0032] In addition to adding 83ml concentration of 9.86mol / LHCl and 9ml13wt%FeCl in the circulating liquid obtained by embodiment 2 through the acid tank 2 Except for the aqueous solution, other process conditions are the same as in Example 1, and the sugar concentration in the product obtained is 6.1wt%.