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A series of refined tannic acid multi-combined purification preparation process and combined preparation of its products

A preparation process and technology of tannic acid, applied in the separation/purification of carboxylic acid compounds, preparation of carboxylic acid esters/lactones, separation/purification of carboxylic acid esters, etc. issues of sex

Inactive Publication Date: 2015-10-14
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong hydrophilicity of tannic acid, although it has strong oxidation resistance in the water phase, its superiority cannot be reflected in the oil phase due to the barrier of solubility.
This limits its application to some extent

Method used

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  • A series of refined tannic acid multi-combined purification preparation process and combined preparation of its products
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] A series of refined tannic acid multi-component purification preparation process and the combined preparation of its products are characterized in that it includes the following steps:

[0076]In the first step, the choice of raw materials for the combined preparation of a series of refined tannic acid multivariate products is gallnut or tara powder material or industrial tannic acid prepared therefrom. The raw materials of gallnut include belly times, horn times and times of flowers. It is required that the air-dried gallnut raw material be pulverized by a plant pulverizer or supplemented with purchased Tara powder so that the pulverization degree of the raw material is 50-200 mesh.

[0077] The second step, the series of refined tannic acid multi-combination purification preparation process and the combined preparation of its products are based on gallnut or tara ultra-fine crushed material or industrial tannin prepared from it as raw materials, through multi-combinat...

Embodiment 2

[0124] The choice of raw materials for the combined preparation of a series of refined tannic acid multivariate products is gallnut or tara powder material or industrial tannic acid prepared therefrom. The raw materials of gallnut include belly times, horn times and times of flowers. It is required that the air-dried gallnut raw material be pulverized by a plant pulverizer or supplemented with purchased Tara powder so that the pulverization degree of the raw material is 50-200 mesh.

[0125] The extraction of gallnut or Tara superfine crushed material adopts double dynamic extraction and sedimentation centrifugal separation process.

[0126] Gallnut powder extraction process is based on three-pot three-step process, atmospheric pressure extraction, extraction temperature 45-50 ° C, solution concentration: 4-5 ° Be' / 20 ° C, extraction ratio: one step 1:5, two Step 1:4, three steps 1:3; extraction temperature: one step 30~42℃, second step 42~50℃, third step 50~60℃; extraction t...

Embodiment 3

[0132] Take the purified solution of gallnut and tara powder extracts, concentrate under vacuum to 7-10°Be' / 20°C, or use gallnut or tara industrial tannic acid to add distilled water or pure water to prepare 7-10°Be ' / 20°C tannic acid solution.

[0133] Take the purification solution or tannic acid solution of the above-mentioned 7-10°Be' / 20°C gallnut and tara powder extract, cool to room temperature and then freeze it with -10°C freezing liquid to 0-5°C for 16 After ~48hr, separate the supernatant liquid or the lower precipitated layer.

[0134] The supernatant liquid extracted by freezing and separating is about 7±2°Be′, one of which can be concentrated and spray-dried to produce dye tannic acid or ink tannic acid; the other can be combined with other processes to prepare other tannic acid series product.

[0135] The lower layer liquid separated by freezing the extraction liquid is concentrated to be used as gallic acid.

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Abstract

The invention relates to a multielement combined purification preparation process of a refined tannic acid serie and a combined preparation of the products. Gallnut or tara ultrarfine grinding material or industrial tannic acid is used as raw material and the multielement combined purification process, equipment and technologies such as extraction, freezing separation, solvent extraction, resin column separation, activated carbon absorption decoloring separation, complexation separation, membrane separation and refining separation to prepare a serie of tannic acid multielement products such as industrial tannic acid, dye tannic acid, beer tannic acid, edible tannic acid, medicinal tannic acid, reagent tannic acid, high purity tannic acid and electronic grade tannic acid, thus the integration and innovation of the green, low-carbon, environmentally friendly and energy-saving industrialized technology that tannic acid raw material is refined and processed deeply can be effectively realized. The combined technology is adopted to effectively realize the integration and innovation of the high, sophisticated, deep and sharp integrated technology that the raw material is used to prepare the serie of refined tannic acid multielement products, which is an achievement of the high and innovative technologies.

Description

Technical field: [0001] The invention relates to a series of refined tannic acid multi-combined purification preparation technology and combined preparation of products thereof, which belongs to fine chemical preparation technology. Background technique: [0002] The invention relates to a series of multi-combination purification preparation technology of refined tannic acid and the combination preparation of its products. In the present invention, gallnut or tara superfine crushed material or its industrial tannic acid are used as raw materials, through multiple combination purification processes, technologies and equipment such as extraction, freezing separation, solvent extraction, resin column separation, activated carbon adsorption decolorization separation, Complexation separation, membrane separation, refining separation, etc. to prepare a series of refined tannin multi-products, such as industrial tannin, dye tannin, beer tannin, edible tannin, medicinal tannin, reag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H13/08C07H1/08C07H1/06C07C65/03C07C51/09C07C51/42C07C69/88C07C67/48
CPCY02P20/10
Inventor 孙先玉孙博李冬玲
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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