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Gallic acid and clean and efficient production process thereof

A technology of gallic acid and process technology, which is applied in the field of gallic acid production process, can solve the problems of large environmental pollution and high loss of gallic acid, etc., and achieve the effects of improving economic benefits, increasing yield, and high-efficiency production

Active Publication Date: 2014-06-11
湖南棓雅生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The production of gallic acid with gallnut as the main raw material originated in the 1970s in China, and there have been many reports, but the past processes have the problems of large environmental pollution and high loss of gallic acid

Method used

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  • Gallic acid and clean and efficient production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 2. Lead the waste liquid generated in the production of gallic acid into the waste liquid adjustment pool, and use the N-503 (N,N-bis-(1-methylheptyl)acetamide) methyl butanone solution with a mass fraction of 40% as The ratio of extraction agent, N-503 methyl butanone solution and waste liquid is 1:8, and three-stage countercurrent extraction of gallic acid in the waste liquid is carried out. After extraction, excess 18% NaOH solution is used for back extraction to generate gallic acid Return to 1 after sodium acid, and regenerate N-503 methyl butanone solution at the same time.

[0015] The waste liquid after the three-stage countercurrent extraction is combined with other domestic wastewater and enters the pH adjustment tank. After adding a small amount of lime milk, it undergoes microbial hydrolysis acidification and EGSB anaerobic reaction. After preliminary precipitation in the primary sedimentation tank, it enters the aerobic tank for biological contact oxidation....

Embodiment 2

[0019] 2. Lead the waste liquid generated in the production of gallic acid into the waste liquid adjustment tank, and use the N-503 (N,N-bis-(1-methylheptyl)acetamide) methyl butanone solution with a mass fraction of 45% as The ratio of extraction agent, N-503 methyl butanone solution and waste liquid is 1:9, and three-stage countercurrent extraction of gallic acid in the waste liquid is carried out. After the extraction, excess 20% NaOH solution is used for back extraction to generate gallic acid Return to 1 after sodium acid, and regenerate N-503 methyl butanone solution at the same time.

[0020] The waste liquid after the three-stage countercurrent extraction is combined with other domestic wastewater and enters the pH adjustment tank. After adding a small amount of lime milk, it undergoes microbial hydrolysis acidification and EGSB anaerobic reaction. After preliminary precipitation in the primary sedimentation tank, it enters the aerobic tank for biological contact oxidat...

Embodiment 3

[0024] 2. Lead the waste liquid generated in the production of gallic acid into the waste liquid adjustment tank, and use the N-503 (N,N-bis-(1-methylheptyl)acetamide) methyl butanone solution with a mass fraction of 50% as The ratio of extractant, N-503 methyl butanone solution and waste liquid is 1:10, and three-stage countercurrent extraction of gallic acid in the waste liquid is carried out. After extraction, excess 17% NaOH solution is used for back extraction to generate gallic acid Return to 1 after sodium acid, and regenerate N-503 methyl butanone solution at the same time.

[0025] The waste liquid after the three-stage countercurrent extraction is combined with other domestic wastewater and enters the pH adjustment tank. After adding a small amount of lime milk, it undergoes microbial hydrolysis acidification and EGSB anaerobic reaction. After preliminary precipitation in the primary sedimentation tank, it enters the aerobic tank for biological contact oxidation. , A...

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Abstract

The invention discloses a clean and efficient production process for gallic acid. The process includes: (1), production process for the gallic acid; and (2), treatment of product waste liquor (recovery the gallic acid in the waste liquor for going back the production process to enable the waste liquor to reach the standard for discharging). The clean and efficient production process is characterized in that the gallic acid is recovered through three-level countercurrent extraction and reextraction, and the wastewater is discharged with standards through the waste liquor treatment. Ultrasonic waves are used for assisting in gallnut hydrolysis and alkalization processes, so that hydrolysis and alkalization efficiency is improved; and compared with existing production technologies, the problem of environment protection is solved, the yield of the gallic acid is improved by 8-9%, availability of medicinal materials is improved, resources are saved, economic benefit of processors is increased, and clean and efficient production of the gallic acid is realized.

Description

technical field [0001] The invention relates to a production technology of gallic acid, in particular to a clean and efficient production technology for extracting gallic acid from gallnuts. Background technique [0002] Galla gall, also known as Baichongcang, Baiyaojian, and Gallia, is a female horned aphid or aphid of the family Aphididae of the order Homoptera. , stabbed to produce a cystic polymer gall, obtained by drying. Apart from a small amount of Chinese gallbladder used as decoction pieces of traditional Chinese medicine, most of it is used to produce gallic acid, which is an important chemical and pharmaceutical intermediate with a wide range of uses. [0003] The production process of gallic acid generally produces a large amount of black waste liquid (about 4.5 tons of waste liquid per ton of gallic acid produced, mainly crystallization mother liquid). In addition to a large number of pollutants, the waste liquid also contains about 2% of gallic acid. Gallic a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C65/03C07C51/02C07C51/47C02F9/14
CPCY02P20/582
Inventor 彭友蔼周康根胡江宇
Owner 湖南棓雅生物科技有限公司