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Preparation method of tara industrial tannic acid

A technology of tannic acid and tara, applied in the preparation of sugar derivatives, chemical instruments and methods, sugar derivatives, etc., can solve difficult problems such as separation and purification of active ingredients

Inactive Publication Date: 2011-08-03
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

[0032] In the processing and production of Tara tannic acid, we found that it is difficult to solve the separation and purification of active ingredients in the process with the traditional single technology of tannic acid production

Method used

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  • Preparation method of tara industrial tannic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A kind of preparation method of Tara technical grade tannic acid is characterized in that comprising the following steps:

[0057] In the first step, the commercial tara powder uses a 400-type pulverizer, 3700RPN, and a sieve bottom of 80-100 mesh.

[0058] In the second step, the Tara powder extraction process adopts a low-temperature two-tank three-step dual-dynamic countercurrent extraction process.

[0059] One-step extraction temperature: 35-45°C, two-step extraction: 40-50°C, three-step extraction: 45-55°C.

[0060] One-step extraction time: 0.5~1hr, two-step extraction time: 0.5~1hr, three-step extraction extraction time: 0.5~1hr.

[0061] One-step extraction solid-liquid ratio: 1:5-6, two-step extraction solid-liquid ratio: 1:4-5, three-step extraction solid-liquid ratio: 1:3-4.

[0062] The third step is to add the Tara powder raw material and water into the double dynamic extractor at a solid-liquid ratio of 1:4-6 according to the above extraction process, h...

Embodiment 2

[0075] Weigh 500kg 80-100 mesh tara powder and place it in a 3000-liter glass-lined or stainless steel dynamic extraction tank with stirring and condenser. The extraction process of tara powder adopts a low-temperature two-tank three-step double dynamic countercurrent extraction process.

[0076] One-step extraction temperature: 40°C, two-step extraction: 45°C, three-step extraction: 50°C.

[0077] One-step extraction time: 0.5hr, two-step extraction time: 0.5hr, three-step extraction extraction time: 0.5hr.

[0078] One-step extraction solid-liquid ratio: 1:5, one-step extraction solid-liquid ratio: 1:4, one-step extraction solid-liquid ratio: 1:3.

[0079] According to the above-mentioned extraction process, the raw materials of Tara powder and water are added into a double dynamic extractor with a solid-liquid ratio of 1:3-5, heated, kept warm, and extracted to prepare a solid-liquid extraction mixture of Tara powder.

[0080] Tara powder solid-liquid extraction mixed liqu...

Embodiment 3

[0092] Weigh 520kg of 80-100 mesh tara powder and place it in a 3000 liter glass-lined or stainless steel dynamic extraction tank with stirring and condenser.

[0093] One-step extraction temperature: 38°C, two-step extraction: 42°C, three-step extraction: 45°C.

[0094] One-step extraction time: 0.5hr, two-step extraction time: 0.5hr, three-step extraction extraction time: 0.4hr.

[0095] One-step extraction solid-liquid ratio: 1:6, one-step extraction solid-liquid ratio: 1:5, one-step extraction solid-liquid ratio: 1:4.

[0096] According to the above leaching process, the raw materials of Tara powder and water are added into a double dynamic extractor with a solid-liquid ratio of 1:4-6, heated, kept warm, and extracted to prepare a solid-liquid extraction mixture of Tara powder.

[0097] Tara powder solid-liquid extraction mixed liquid separation adopts spiral sedimentation centrifugal separation (horizontal spiral discharge centrifugal separation) process, that is, LW hor...

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Abstract

The invention relates to a preparation method of tara industrial tannic acid. In the preparation method, tara powder is taken as a raw material, the problems of filtration, sol, superfine fiber particles, undissolved substances, high non tannis and the like in the producing and processing technology of tara tannis are successfully solved through combination and coupling technologies such as double dynamic lixiviation, spiral sedimentation centrifugal separation (horizontal type spiral unloading centrifugal separation), foam separation, sedimentation separation, plate-frame pressure filtration and the like and equipment processing, so as to obtain the qualified tara industrial tannic acid. The preparation method has the advantage of advanced technology; and by using the preparation method, low-temperature, efficient and industrialized production, combination and coupling extraction and a novel solid-liquid separation technique of the tara powder are achieved.

Description

Technical field: [0001] The invention relates to a preparation process and method of Tara industrial tannic acid. Background technique: [0002] Tara is the Chinese transliteration of the plant Tara of Caesalpinia spinosa. The powder ground from its pods is called Tara powder, also known as tara powder. The main component of tara powder is gallotannin, and its content can reach 47-60% (dry basis). The characteristic structure of tara tannin is the esterification product of benic acid and D-quinic acid. Because its pods are rich in gallic tannins, it has attracted the favor of scientific research, industry and market. At the same time, the unique characteristics of Tara and Tara tannins as natural polyphenols have attracted the attention and investment of scholars and markets around the world. Especially in the past 20 years, the fluctuation and soaring of domestic gallic acid prices have caused many manufacturers to turn to imported tara powder to produce tara tannic aci...

Claims

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Application Information

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IPC IPC(8): C07H13/08C07H1/08
Inventor 孙先玉张宗和孙博
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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