A kind of ultrasonic-assisted bio-enzymatic method for extracting Acacia chinense extract

Abstract

The invention discloses a method for extracting acacia melanoxylon tannin extract by an ultrasonic-assisted biological enzyme method, wherein the method comprises the steps: putting acacia melanoxylontannin extract powder into ultrasonic countercurrent extraction equipment, adding water, regulating the pH value to 4.5-5.5 with weak acid, adding a biological enzyme, carrying out ultrasonic countercurrent extraction, and filtering to obtain a leaching solution; adding EDTA, attapulgite and oxalic acid into the leaching solution, standing, filtering, removing precipitates, and concentrating under reduced pressure to obtain a tannin extract concentrated solution; and adding a sulfonating agent, glyceryl stearate sulfate sodium salt and sodium dodecyl sulfate into the tannin extract concentrated solution for modification, adjusting the pH to 6-7 by using sodium tripolyphosphate, and carrying out spray drying to obtain the acacia melanoxylon tannin extract with high tannin content. According to the method disclosed by the invention, the tannin extract is extracted from acacia melanoxylon bark, a raw material supply chain of the tannin extract is expanded, the extracted tannin extract has the advantages of low color value, high tannin content, high tannin extract yield and the like, and the method is simple in process, relatively low in cost, high in production efficiency and good inmarket prospect.

Description

technical field [0001] The invention relates to the technical field of extracting tannin extract, in particular to a method for extracting acacia tannin extract by ultrasonic-assisted biological enzymatic method. Background technique [0002] Tannin extract is a chemical product obtained by processing tannin-rich plant raw materials through water extraction and concentration. Usually tan to tan, powdery or lumpy. In addition to the main component of tannin, the composition of tannin also includes non-tannin and insoluble matter. Tannins are divided into hydrolyzed tannins and condensed tannins, which are mainly used for tanning leather and are called vegetable tanning agents in the leather industry. In addition, it is also used as oil drilling mud thinner and plugging agent, industrial gas wet desulfurization agent, boiler descaling and antiscaling agent; mineral processing inhibitor, water purification treatment agent, battery cathode additive, metal corrosion inhibitor, ...

AI Technical Summary

Problems solved by technology

The bark of Acacia ebony is rich in tannin, and it is also a good raw material tree species for tannins. However, there is no research report on the use of tannins from the bark of Acacia ebony. It will make up for the current situation that the supply of the tannin extract market is in short supply, and promote the development of the Acacia blackwood industry, which is of great significance to the development of my country's agricultural and forestry economy