Combined pretreatment method of lignocellulose raw material

The invention relates to a combined pretreatment method of a lignocellulose raw material. The combined pretreatment method comprises the following steps: soaking the lignocellulose raw material in a diluted acid solution at room temperature; placing the soaked lignocellulose raw material into a stea...

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Hauptverfasser:	HUI JIXING, XU YOUHAI, HU SHIYANG, ZHU QINGWEI, YUE JUN, LIU HAIJUN, WANG LONGHUI
Format:	Patent
Sprache:	eng
Schlagworte:	BEER BIOCHEMISTRY CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS ENZYMOLOGY FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY MICROBIOLOGY MUTATION OR GENETIC ENGINEERING SPIRITS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE VINEGAR WINE
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Beschreibung
Zusammenfassung:	The invention relates to a combined pretreatment method of a lignocellulose raw material. The combined pretreatment method comprises the following steps: soaking the lignocellulose raw material in a diluted acid solution at room temperature; placing the soaked lignocellulose raw material into a steam-explosion machine at the temperature between 180 DEG C and 220 DEG C under the pressure between 1.2 and 1.6MPa and then immediately releasing the pressure so that the treated material is sprayed out; sending the treated lignocellulose raw material into a reactor, adding calcium hydroxide into feed liquid, carrying out high-temperature cooking, introducing carbon dioxide into the cooked feed liquid, reacting calcium hydroxide in the feed liquid with carbon dioxide to obtain calcium carbonate precipitate so that the pH value of the feed liquid is decreased. By the combined pretreatment method, hemicelluloses and lignin in the lignocellulose raw material can be removed, the availability of the cellulose is increased, the conversion efficiency from cellulose to glucose is increased, the requirement on the device is not high, and the used sulfuric acid and calcium hydroxide are conventional chemical reagents which are easily prepared and inexpensive.