Process for preparing sodium copper chlorophyllin from ginkgo leaf leftovers

A technology of sodium copper chlorophyllin and leftovers, applied in organic chemistry and other fields, can solve problems such as waste, unsatisfactory product purity, and high production costs, and achieve the effects of reducing production costs, improving competitiveness, and stabilizing quality

Inactive Publication Date: 2012-11-14
NINGBO LIWAH PLANT EXTRACTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the existing high production cost of extracting copper chlorophyllin sodium salt from alfalfa and silkworm excrement, the purity of the product is not ideal, and the ginkgo leaf leftovers produced during the production of ginkgo leaf extract are treated as waste, resulting in relatively high production cost. To solve the problem of large waste, a process for preparing sodium cop

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  • Process for preparing sodium copper chlorophyllin from ginkgo leaf leftovers
  • Process for preparing sodium copper chlorophyllin from ginkgo leaf leftovers
  • Process for preparing sodium copper chlorophyllin from ginkgo leaf leftovers

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Embodiment 1

[0052] (1) Extraction and concentration: 100g ginkgo leaf leftovers were heated and refluxed for 6 hours with ethanol with a mass concentration of 90% at 80°C for 6 hours, extracted twice, and the residue was removed by filtration, and the obtained filtrate was concentrated under reduced pressure to 70% of the original volume (for evaporate part of the solvent);

[0053] (2) Saponification: Adjust the pH of the filtrate treated in step (1) to about 11 with 20% sodium hydroxide aqueous solution, heat to 40°C, saponify for 20 minutes, cool to room temperature, and filter to remove the unsaponifiable viscous Obtain filtrate with impurities;

[0054] (3) Ethyl acetate extraction and impurity removal: Ethanol is evaporated from the filtrate obtained in step (2) under reduced pressure, water equal to the volume of the filtrate from which ethanol has been evaporated is added, and the mixed solution is obtained by stirring evenly, and an equal volume of the mixed solution is added to ...

Embodiment 2

[0059] (1) Extraction and concentration: 100g of ginkgo leaf leftovers were extracted with ethanol with a mass concentration of 95% under reflux at 70°C for 4 hours, extracted once, and the residue was removed by filtration, and the obtained filtrate was concentrated under reduced pressure to 80% of the original volume;

[0060] (2) Saponification: Adjust the pH of the filtrate treated in step (1) to about 12 with 40% sodium hydroxide aqueous solution, heat to 30°C, saponify for 60 minutes, cool to room temperature, and filter to remove the unsaponifiable viscous Obtain filtrate with impurities;

[0061] (3) Ethyl acetate extraction and impurity removal: Ethanol is evaporated from the filtrate obtained in step (2) under reduced pressure, and water equal to the volume of the filtrate from which ethanol has been evaporated is added, and the mixture is obtained by stirring evenly, and the volume of the mixture is added to the mixture. twice as much ethyl acetate, extracted 4 time...

Embodiment 3

[0066] (1) Extraction and concentration: 100g of ginkgo biloba leftovers were heated and refluxed with ethanol with a mass concentration of 95% at 75°C for 5 hours, extracted once, and the residue was removed by filtration, and the obtained filtrate was concentrated under reduced pressure to 75% of the original volume;

[0067] (2) Saponification: Adjust the pH of the filtrate treated in step (1) to about 11 with 20% sodium hydroxide aqueous solution, heat to 30°C, saponify for 30 minutes, cool to room temperature, and filter to remove the unsaponifiable viscous Obtain filtrate with impurities;

[0068] (3) Ethyl acetate extraction and impurity removal: Ethanol is evaporated from the filtrate obtained in step (2) under reduced pressure, water equal to the volume of the filtrate from which ethanol has been evaporated is added, and the mixed solution is obtained by stirring evenly, and an equal volume of the mixed solution is added to the mixed solution ethyl acetate, extracted ...

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Abstract

The invention discloses a process for preparing sodium copper chlorophyllin from ginkgo leaf leftovers, which aims to solve the problems that the production cost is high and the product purity is unsatisfactory in the existing method for extracting sodium copper chlorophyllin from alfalfa and silkworm dropping, and a great waste is caused because ginkgo leaf leftovers generated during ginkgo leaf extract production are treated as waste. The process comprises the following main steps: (1) extracting, and concentrating; (2) saponifying; (3) extracting with ethyl acetate, and removing impurities; (4) performing acidification and copper substitution; (5) removing impurities through macroporous resin; and (6) salifying. By using low-cost ginkgo leaf leftovers generated during ginkgo leaf extract production as the raw materials, the process greatly reduces the production cost, improves the competitive power of the product and increases the economic benefits; during extraction, the process has a good impurity removal effect; and the obtained product is high in purity and stable in quality.

Description

technical field [0001] The invention relates to the technical field of plant extraction, in particular to a process for preparing sodium copper chlorophyllin from ginkgo leaf leftovers. Background technique [0002] Ginkgo biloba is the dry leaf of Ginkgoaceae plants, which has been used for medicinal purposes in my country as early as 5,000 years ago. In addition to containing a large amount of ginkgo flavonoids and ginkgolides, ginkgo leaves are also rich in chlorophyll. Most of the existing ginkgo leaves are used to extract the medicinal ingredients, that is, ginkgo leaf extract. The main process route is: Ginkgo leaf plus ethanol reflux extraction, concentrated and layered, the upper layer is the crude extract of ginkgo leaf extract, and the lower layer is Solid ginkgo leaf leftovers, after centrifugation, the upper layer of ginkgo leaf extract crude extract is used as ginkgo leaf extract for further processing, and the lower layer is precipitated as ginkgo leaf leftove...

Claims

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Application Information

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IPC IPC(8): C07D487/22
Inventor 汪俊高坤孙振蛟丁欢星程国才谢继才
Owner NINGBO LIWAH PLANT EXTRACTION TECH
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