Multielement combined purification preparation process of refined tannic acid serie and combined preparation of 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., can solve the problem of limited application, can not reflect the superiority, solubility Obstacles and other issues

Inactive Publication Date: 2011-07-20
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, ...

Method used

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  • Multielement combined purification preparation process of refined tannic acid serie and combined preparation of products
  • Multielement combined purification preparation process of refined tannic acid serie and combined preparation of products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0076] In the first step, the selection of raw materials for the combined preparation of a series of refined tannic acid multi-products is gall or tara powder or industrial tannic acid prepared therefrom. The raw materials of Chinese gall include belly, jiao, and flower. It is required that the air-dried raw material of Galla Chinensis is pulverized by a plant pulverizer or the pulverization degree of the raw material after supplementary pulverization is 50-200 mesh.

[0077] In the second step, a series of refined tannic acid multi-combination purification preparation process and the combined preparation of its products are based on gall or Tara ultra-fine pulverization ratio material or industrial tannic acid prepared therefrom as raw materials, through multi-combination purification Proces...

Embodiment 2

[0112] The raw materials for the combined preparation of a series of refined tannic acid multi-products are gall or tara powder or industrial tannic acid prepared therefrom. The raw materials of Chinese gall include belly, jiao, and flower. It is required that the air-dried raw material of Galla Chinensis is pulverized by a plant pulverizer or the pulverization degree of the raw material after supplementary pulverization is 50-200 mesh.

[0113] The extraction of gall or Tara ultra-fine crushing ratio materials adopts dual dynamic extraction, sedimentation and centrifugal separation process.

[0114] The extraction process of gallic powder is based on the three-tank three-step process, atmospheric pressure extraction, the extraction temperature is 45~50℃, the concentration of the solution: 4~5°Be' / 20℃, the ratio of the extraction solution: one step 1:5, two Step 1:4, three steps 1:3; extraction temperature: 30~42℃ in one step, 42~50℃ in two steps, 50~60℃ in three steps; extracti...

Embodiment 3

[0120] Take the purified liquid of the extract of Galla Chinensis and Tara powder, and concentrate it to 7~10°Be′ / 20℃ under vacuum and reduced pressure, or use Galla Chinensis or Tara industrial tannic acid with distilled water or purified water to prepare 7~10°Be ' / 20℃ tannic acid solution.

[0121] Take the above 7~10°Be′ / 20°C Galla Chinensis, Tara powder extract purified liquid or tannic acid solution, cool to room temperature and then freeze with -10°C freezing solution to 0~5°C still freeze 16 After ~48hr, separate the upper clear liquid or the lower precipitation layer.

[0122] The supernatant liquid separated from the extract by freezing is about 7±2°Be′. One can be concentrated and spray-dried to prepare dye tannic acid or ink tannic acid; the other can be combined with other processes to prepare other tannic acid series product.

[0123] The lower layer liquid obtained by freezing and separating the extract is concentrated for 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-component combined purification preparation process and the combined preparation of its products. The technology belongs to the preparation technology of fine chemicals. Background technique: [0002] The invention relates to a series of refined tannic acid multi-component combined purification preparation process and combined preparation of its products. The present invention uses gall or Tara ultra-fine crushing ratio material or its industrial tannic acid as raw materials, through multiple combined purification processes, technologies and equipment such as extraction, freezing separation, solvent extraction, resin column separation, activated carbon adsorption decolorization separation, Complexation separation, membrane separation, refined separation, etc. to prepare a series of refined tannic acid multi-products, such as industrial tannic acid, dye tannic acid, beer tannic acid, edible tann...

Claims

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Application Information

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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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