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Method for preparing nano tea polypherals rare earth complexes by liquid phase method

A technology of rare earth complexes and tea polyphenols is applied in the field of preparation of rare earth complexes of tea polyphenols, which can solve the problems of rare earth synthesis and application of nano-tea polyphenols, etc., which have not seen relevant reports, and achieve the effect of good anti-aging performance.

Inactive Publication Date: 2007-10-17
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Tea polyphenols and Ca 2+ , Zn 2+ 、Cr 6+ 、Ag + 、Th 4+ 、Sr 2+ , Hg 2+ , Sb 3+ , V 5+ , Fe 3+ , Fe 2+ 、Mo 6+ , pb 2+ 、Ni 2+ , Mn 2+ , Mg 2+ 、Co 2+ 、Cu 2+ 、K + 、Ba 2+ 、Al 3+ 、 Bi 3+ 、 Ge 4+ 、Se 2+ and W 6+ The research on the complexing performance and application of various metal ions such as polyphenols has been reported in many literatures, but there are no relevant reports on the synthesis and application of nano-tea polyphenol rare earth

Method used

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  • Method for preparing nano tea polypherals rare earth complexes by liquid phase method

Examples

Experimental program
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Effect test

example 1

[0026] In 100ml 0.1M tea polyphenol solution, add 100ml 20% concentration of lanthanum chloride aqueous solution, after magnetic stirring, at room temperature, add 1M NaOH drop by drop to pH 6.0, continue to stir for 24h after the dropwise addition, the resulting product The centrifugation is carried out at 4000r / min, the precipitate is washed with distilled water for 3 times, centrifuged and dehydrated, and the nano-tea polyphenol lanthanum complex is separated into a solid. The solid matter was concentrated in a drying oven at 340K for 24 hours under vacuum to obtain a solid powder of the complex.

example 2

[0028] In 100ml 0.1M tea polyphenol solution, add 100ml 40% concentration of cerium chloride aqueous solution, stir magnetically, at room temperature, add 1M NaOH drop by drop to pH 7, stir for 24h after the dropwise addition, and the resulting product is dissolved at 4000rr / min for centrifugation, the precipitate was washed 5 times with distilled water, and centrifugally dehydrated to obtain a solid nano-tea polyphenol cerium complex. The solid matter was concentrated in a drying oven at 340K for 24 hours under vacuum to obtain a solid powder of the complex. .

example 3

[0030] In 100ml 0.1M tea polyphenol solution, add 100ml 50% chlorinated symbiotic rare earth aqueous solution, stir magnetically, and add 1M NaOH dropwise at room temperature until the pH is 4.5, stir for 24 hours after the dropwise addition, the product is Centrifugal separation at 4000r / min, the sediment was washed 8 times with distilled water, and centrifugal dehydration to obtain the solid nano-tea polyphenol symbiotic rare earth complex. The solid matter was concentrated in a drying oven at 340K for 24 hours under vacuum to obtain a solid powder of the complex.

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Abstract

The present invention relates to the preparation method of nanometer tea polyphenol rareearth complexes, including, dropping NaOH, NaHCO3 or ammonia alkaline solution for regulating pH values in water solution which is generated by mixing tea polyphenol water solution with rare-earth water solution as equal volume, magnetic stirring, washing 3 to 8 times and centrifugating to obtain nano tea polyphenol rare-earth complexes. Centrifugating the rare-earth complexes with centrifuge at 4000r / min, then centrifugal dehydrating and separating it to obtain nano tea polyphenol rare-earth complexes solid, which is vacuum dried at 340K for 24h to obtain solid powder, wherein above rare-earth element is La, Ce, Pr or its symbiosis rare-earth, controlling pH values of mixed liquor between 4 and 8 in dropping alkaline solution to regulate pH values. The present invention pioneer synthesis of nanometer tea polyphenol rareearth complexes, which has antibiotic performance and well ageing resistance and can be used as novel anti-bacteria agent and oxidation preventive.

Description

technical field [0001] The invention relates to a preparation method of an organic rare earth complex, in particular to a preparation method of a tea polyphenol rare earth complex. Background technique [0002] Tea contains more than 450 kinds of organic matter and more than 15 kinds of inorganic elements, among which tea polyphenols (TeaPolyphenols, referred to as TP) are the main active components of tea, accounting for 15-30% of the total weight of tea. Tea polyphenols, also known as tea tannins and tea tannins, are a class of polyhydric phenolic organic compounds present in tea. Tea polyphenol is a natural, efficient and safe antioxidant, which has the effect of scavenging superoxide free radicals and hydroxyl free radicals, and is harmless to the human body. It has been successfully used in food, oil, medical care, daily necessities, feed and many other fields. [0003] Tea polyphenols are mainly composed of flavanols (commonly known as catechins), which usually accou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D311/62C07F5/00
Inventor 陈庆华肖荔人钱庆荣黄宝铨程慧青许兢刘欣萍
Owner FUJIAN NORMAL UNIV
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