Method for preparing L-arabinose

Abstract

The invention provides a preparation method of L-arabinose, comprising the following steps: a reduction of glucose content; b refinement of xylose mother liquor; c concentration and deoxygenation; d chromatographic fractionation; finally L-arabinose being obtained from the xylose mother liquor. The L-arabinose is obtained form the xylose mother liquor as by-product of crystal xylose from the agricultural waste. The process is simple, the operation is easy and the addition value of the xylose mother liquor is greatly increased and the production cost of L-arabinose is reduced; the chromatographic separation device uses the market chromatographic fractionation resin applied and tested by a large number of industrial applications without special device and the separation effect is good and the production process is in full automatic control and the labor intensity is low and the production site is small.

Description

technical field [0001] The invention relates to the technical field of functional sugar production, in particular to a preparation method of L-arabinose. Background technique [0002] L-arabinose is a five-carbon aldose, also known as pectin sugar, which is often combined with other monosaccharides and exists in gum, hemicellulose, pectic acid, bacterial polysaccharides and certain glycosides. Clinical trials have shown that L —Arabinose has a blocking effect on the metabolic conversion of sucrose, so it has broad application prospects in weight loss, control of elevated blood sugar levels in diabetics, etc. For the production of L-arabinose, at present mainly adopt semi-fibrous material, obtain by the hydrolysis of arabinan, such as Chinese patent 01800804.6 has introduced a kind of main component that contains arabinan, arabinoxylan or arabinogalactose The natural substance of L-arabinose is obtained through the action of free L-arabinose active enzyme. This process requi...

AI Technical Summary

Problems solved by technology

For the production of L-arabinose, at present mainly adopt semi-fibrous material, obtain by the hydrolysis of arabinan, such as Chinese patent 01800804.6 has introduced a kind of main component that contains arabinan, arabinoxylan or arabinogalactose The natural substance of L-arabinose is obtained through the action of free L-arabinose active enzyme. This process requires special enzymatic hydrolysis conditions, so it is impossible to obtain pure crystalline L-arabinose finished product; Chinese patent 99805686.3 discloses a method through The method for preparing L-arabinose by selective acidolysis of plant fiber raw materials, through the patent 02116353.7, involves a two-column method for extracting L-arabinose from gum arabic. The above two methods have been verified by experiments and found that the yield are very low, the economic benefits are also very low, and have no promotion and application value

Xylose mother liquor is a by-product obtained from the production of crystalline xylose from corn cobs, and contains about 25% of L-arabinose. At present, this xylose mother liquor is mainly used to make caramel pigment and produce liquid xylitol, with a market value of very low

And take xylose mother liquor as raw material, the patent that prepares L-arabinose by adopting the method for chromatographic separation has not yet been reported.