Method for extracting d- and l- xylose, arabinose

The present invention provides a D? Xylose and L? Arabinose extraction process, agricultural and forestry waste is first acidified, then acidified waste gas explosion agriculture and forestry, agricultural and forestry wastes resulting steam explosion mud, the final water extraction, separation, crystallization derived D? xylose and L? arabinose. Aspect of the present invention has the following advantages: (1) to achieve a recovery of the acid solution, reduces acid consumption; (2) acid content extract small, reducing the burden of post-purification treatment; short (3) Cycle , steam explosion can realize continuous production, reduce equipment investment Similarly capacity; no heating (4) and the booster steam together with acid greatly reduce the steam consumption, energy saving;? (5) for the first D-xylose and L ? arabinose separation, fractional crystallization process, to improve the D? xylose purity of massecuite crystallization, increased D? xylose crystallization yield and quality.