Preparation of oligomer and monomer from tannin by catalytic hydrogen degradation

A technology for plant tannin and catalytic hydrogenolysis, which is applied in the preparation of organic compounds, organic chemistry methods, chemical instruments and methods, etc. Problems such as hydroxyl oxidation, loss of biological and chemical activity of products, etc., to achieve the effect of improving resource utilization and added value, less waste discharge, and high product value
CN1583686AInactive Publication Date: 2005-02-23SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN UNIV
Publication Date
2005-02-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

A process for preparing oligomer or monomer from vegetative tannin includes such steps as immersing the plant rich in tannin in alcohol or ketone, extracting to obtain liquid extract, recovering solvent , filter, extractin in different solvents to obtain different components, catalytic hydrogendyzing to obtain coarse pdyphenol monomer and oligomer, and purifying to obtain oligoproanthocyaridin, ellagic acid, and gallic acid.
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Description

1. Technical field

[0001] The invention relates to a catalytic hydrogenolysis preparation method for degrading plant tannins into oligomers and monomer compounds. This method can be used to prepare oligomeric proanthocyanidins (OPC's) from condensed tannins (polymeric proanthocyanidins), and to prepare bioactive components of ellagic acid, gallic acid, and galloyl ester glucose from hydrolyzed tannins. It can also be used for The invention relates to the degradation modification of tannin extract or adhesive, which belongs to the field of fine chemical industry. 2. Background technology

[0002] Plant tannin is a plant polyphenol secondary substance produced by plant secondary metabolism. It widely exists in plant leaves, wood, bark and fruit, and is a renewable green resource. For example, the tannin content in the bark of coniferous plants is as high as 20%-40%. Only this item has an annual output of hundreds of millions of tons in the world, so tannin is an important obj...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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