System and method for producing pentose solution by series continuous hydrolyzation

Abstract

The invention discloses a system to make pentose solution through serially continuing hydrolysis for agricultural and forestry chemical waste, which contains N-grade of mutually serial hydrolytic units, wherein N is integral, which is not less than 2; each grade of hydrolytic unit includes mutually serial hydrolytic device and solid-liquid separating device to hydrolyze the agricultural and forestry chemical waste and separate liquid and solid of the hydrolyzed mixture to generate the hydrolytic acid liquid and solid with pentose. The system makes the entire technique realize automation with high conversion rate of agricultural and forestry chemical waste and high pentose solution density, which produces the solid material as raw material cellulose of alcohol.

Description

technical field [0001] The invention relates to a technology for producing a pentose solution from agricultural and forestry waste, in particular to a system and a method for preparing a pentose solution through serial and continuous hydrolysis. Background technique [0002] Furfural, also known as furan formaldehyde, has two double bonds and an aldehyde group on the furan ring. This unique chemical structure can make it undergo oxidation, hydrogenation, chlorination, nitration and condensation reactions to produce many chemical products. , so it is widely used in many production fields such as pesticides, medicines, petrochemicals, food additives, and casting. [0003] Furfural is produced from plant fibers rich in pentosans, such as corn cobs, corn stalks, straw, bagasse, cottonseed hulls, rice husks, etc. The principle is that pentosans in plant fibers are first hydrolyzed into pentoses , and then dehydration of pentose sugars to furfural, namely [0004] [0005] ...

AI Technical Summary

Problems solved by technology

However, because the solid material needs to be transferred from the primary hydrolysis tank to the next-level hydrolysis tank sequentially, it cannot be carried out continuously, so it is not easy to realize automation; at the same time, this prior art does not have the step of pressing and separating after hydrolysis, resulting in low xylose extraction rate; In addition, since this method undergoes high-temperature water cooking and high-temperature water washing processes before hydrolysis, the cellulose is seriously damaged, and the cellulose produced at the end of this method can only be discarded or used as fuel, and cannot be used for subsequent reuse such as extraction of ethanol. , and there is still the possibility of polluting the environment

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