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DELIGNIFICATION OF WHEAT STRAW IN THE COOKING SYSTEM WITH ALKALI-OXYGEN

Zhang Jiana, Guo Shanfu

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Abstract

The delignification of wheat straw with alkali-oxygen cooking was studied, and the effects of technological conditions on delignification of wheat straw were discussed. The results showed that appropriate conditions of delignification were temperature 160C, concentration of NaOH 8%, pressure of oxygen 0.8 MPa, the ratio of solid(wheat straw) to liquid 0.14 and time of heat preservation l h. At the same time, the structure of lignin was annalyzed by means of IR and 1H-NMR.

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What this paper is about

The delignification of wheat straw with alkali-oxygen cooking was studied, and the effects of technological conditions on delignification of wheat straw were discussed. The results showed that appropriate conditions of delignification were temperature 160C, concentration of NaOH 8%, pressure of oxygen 0.8 MPa, the ratio of solid(wheat straw) to liquid 0.14 and time of heat preservation l h. At the same time, the structure of lignin was annalyzed by means of IR and 1H-NMR.

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Available abstract

The delignification of wheat straw with alkali-oxygen cooking was studied, and the effects of technological conditions on delignification of wheat straw were discussed. The results showed that appropriate conditions of delignification were temperature 160C, concentration of NaOH 8%, pressure of oxygen 0.8 MPa, the ratio of solid(wheat straw) to liquid 0.14 and time of heat preservation l h. At the same time, the structure of lignin was annalyzed by means of IR and 1H-NMR.

Key concepts: Straw, Chemistry, Alkali metal, Lignin, Oxygen, Oxygen pressure, Inorganic chemistry, Organic chemistry

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