A kind of method for separating levo-glucan from wood vinegar

Abstract

The invention discloses a method for separating levoglucosan from wood vinegar. The method uses wood vinegar as a raw material. The separation process includes: adding an alkaline compound to adjust the wood vinegar to alkaline, and adding flocculation After flocculation, the liquid is filtered to remove the precipitate; after filtration, the clear liquid is added with a decolorizing agent for heat preservation and decolorization; after decolorization, the clear liquid is separated by ion exchange resin, and pure water is selected as the eluent for elution, and the levoglucosan The eluate was concentrated and precipitated with methanol to obtain the product levoglucosan. The invention can remove a large amount of impurities in the stock solution of the wood vinegar through pretreatment, and effectively separate the levoglucosan component in the wood vinegar.

Description

technical field

[0001] The invention relates to a method for separating wood vinegar, in particular to a method for separating levoglucosan components in wood vinegar. Background technique

[0002] Wood vinegar is a dark brown liquid, which is obtained by condensing the vapors produced during the dry distillation and pyrolysis of various biomass wastes such as sawdust, wheat straw and wood to produce fuel gas. Wood vinegar has important application value in many aspects: in medicine, wood vinegar has a good curative effect on diabetes and liver disease, and at the same time, wood vinegar can also prevent and treat skin diseases and beriberi Function; in agriculture, wood vinegar can effectively drive away pests, and also has a bactericidal effect, thereby greatly reducing the use of pesticides, which plays a very important role in the protection of the ecological environment; in light industry, wood vinegar It can be used as an additive for many items, such as cosmetics and...

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