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Method for preparing tea saporin pool-cleaning agent using tea dreg as raw material

A technology of tea saponin and pond-clearing agent, which is applied in the field of preparing tea saponin pond-clearing agent by using tea pulp as raw material, can solve the problems of seldom use, high toxicity to humans and animals, easy to cause allergic reactions, etc., and achieves improved quality and additional Value, increase market competitiveness, easy penetration effect

Inactive Publication Date: 2007-06-13
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The common varieties of plant-based pond clearing agents include tea meal, croton, etc. Croton was once a commonly used pond clearing drug in Jiangsu and Zhejiang, but due to its high toxicity to humans and animals, it is easy to cause allergic reactions after contact with humans and animals, so it is rarely used now

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Put 2.4 kg of 16-30 mesh tea meal powder into an extraction tank, use 50% methanol-acetone (4:1) aqueous solution of 10 times the dry weight (W / W) of the tea meal powder, and reflux extraction at 66°C for 3 Once, each time for 2 hours, the extracts were combined and filtered. Under the conditions of -0.06~-0.095MPa and 50~75°C, the filtrate was recovered from the solvent under reduced pressure and concentrated in vacuo to a concentrated concentration of 8 to 12 degrees Baume (60°C). Add 3-6% soluble starch, 0.9-1.6% salt and 0.6-1.2% calcium hydroxide to the concentrated liquid to make the concentration of the liquid reach 10-15 degrees Baume (60°C), and spray dry it into tea Saponin pond cleaner. After determination, the extraction rate of tea saponin in tea dregs is 93.1%, and the content of tea saponin in Qingtang preparation is 58.1%.

Embodiment 2

[0028] Put 2.6 kg of 16-30 mesh tea meal powder into an extraction tank, extract 2 times at 50°C with 30% aqueous methanol solution of 12 times the dry weight of tea meal powder (W / W), and extract them together for 3 hours each time. liquid, filtered, and the filtrate was recovered under reduced pressure at -0.06~-0.095MPa, 50~75°C, and concentrated in a vacuum to a concentrated solution of 8~12 degrees Baume (60°C). % soluble starch, 0.9-1.6% salt and 0.6-1.2% calcium hydroxide, so that the concentration of the feed solution reaches 10-15 degrees Baume (60°C), and spray-dry to form a tea saponin pond clearing agent. After determination, the extraction rate of tea saponin in tea dregs is 92.8%, and the content of tea saponin in Qingtang preparation is 62.9%.

Embodiment 3

[0030] Put 3.2 kg of 16-30 mesh tea meal powder into an extraction tank, use 6 times the dry weight of tea meal powder (W / W) in 70% methanol aqueous solution, reflux extraction at 75 ° C for 1 hour, filter, and the filtrate is at -0.06 ~-0.095MPa, 50~75℃, the solvent is recovered under reduced pressure, vacuum concentrated into a concentrated solution of 8~12 Baume degrees (60℃), and 3~6% of the concentrated solution’s weight is added with soluble starch, 0.9~1.6 % table salt and 0.6-1.2% calcium hydroxide to make the feed liquid concentration reach 10-15 degrees Baume (60°C), and spray-dry to form tea saponin pond clearing agent. After determination, the extraction rate of tea saponin in tea dregs is 94.6%, and the content of tea saponin in Qingtang preparation is 56.3%.

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Abstract

The present invention provides a method for preparing tea-saponin pond-cleaning agent by using tea dregs as raw material. Said method includes the following steps: adopting hydrophilic solvent aqueous solution to extract dried tea dregs for three times at 50-75 deg.C, combining extracts, filtering said extract mixture, making the filtrate undergo the processes of decompression recovering solvent and concentration to obtain concentrate, adding soluble starch, edible salt and calcium hydroxide, spray-drying so as to obtain the invented tea saponin pond-cleaning agent.

Description

technical field [0001] The invention relates to a green chemical production method for extracting natural medicinal active ingredients from agricultural and forestry waste, and more specifically relates to a method for extracting tea saponin active ingredients from tea dregs to prepare an environment-friendly plant-like pond clearing agent. Background technique [0002] In the process of aquaculture, clearing ponds is a very critical procedure. Different types of clearing pond medicines are often used in clearing ponds due to different cultured species, different frequently-occurring diseases, and convenient sources of medicines. For example, seedling ponds are often used Killing-type clearing pond medicine, while selective-killing pond-clearing medicine is often used in shrimp and crab breeding ponds. [0003] In aquaculture ponds, pond clearing agents are mainly used to remove wild fish, frog eggs, tadpoles, aquatic insects, snails, leeches, aquatic algae plants, pathogeni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/00A01P7/04A01N65/08
Inventor 陈剑锋
Owner FUZHOU UNIV
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