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Method for extracting gossypol from cottonseed by utilizing microwave radiation and dedicated apparatus therefor

A microwave radiation, cottonseed technology, applied in chemical instruments and methods, preparation of organic compounds, separation/purification of carbonyl compounds, etc., to achieve the effect of high extraction rate and short duration

Inactive Publication Date: 2006-06-21
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 3. Anthranilate precipitation method: this method is only suitable for cotton oil factories to extract gossypol acetate from cotton oil

Method used

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  • Method for extracting gossypol from cottonseed by utilizing microwave radiation and dedicated apparatus therefor
  • Method for extracting gossypol from cottonseed by utilizing microwave radiation and dedicated apparatus therefor

Examples

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example 1

[0017] Example 1. Cottonseed (produced in Cangzhou, Hebei Province) is smashed with a household pulverizer. Weigh a group of 500g with a balance. Put the weighed pulverized cottonseed into a container of 1000ml of acetone-water (4:1) extract and soak for 5h. After being irradiated in a microwave oven for 6 minutes at a power of 630W, the extract was diluted with water to precipitate yellow gossypol crystals, acidified with 95% acetic acid, concentrated and recrystallized to obtain 2.21 g of gossypol acetate.

example 2

[0018] Example 2. Cottonseed (produced in Cangzhou, Hebei Province) is crushed with a household pulverizer. Weigh a group of 500g with a balance. Put the weighed pulverized cottonseed into a container of 1000ml of acetone-water (4:1) extract and soak for 5h. Transfer to a microwave oven and irradiate for 8 minutes at a power of 570W. The extract was diluted with water to precipitate yellow gossypol crystals, acidified with 95% acetic acid, and concentrated to obtain 2.01 g of gossypol acetate.

example 3

[0019] Example 3. Cottonseed (produced in Xinjiang) is smashed with a household pulverizer. Weigh a group of 500g with a balance. Put the weighed crushed cottonseed into 1000ml of Na 2 CO 3 -NaHCO 3 (pH=10) Soak in the container of the extract for 6h. After being irradiated in a microwave oven for 8 minutes at a power of 630W, the extract was diluted with water to precipitate yellow gossypol crystals, acidified with 95% acetic acid, and concentrated to obtain 2.07 g of gossypol acetate.

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Abstract

The invention discloses a method and especial device for extracting gossypol in cotton seed by using microwave radiation, disintegrating the cotton seed firstly, then immersing in the extracting agent, extracting under radiation in the microwave macjine, diluting the extracting solution with water to educt coarse gossypol, acidifying in acetic acid, compressing, recrystallizing, sucting and getting the gossypol acetate. The invention provides a new method for extracting gossypol from cotton seed by using microwave radiation and is characterized by fast, high effective, energy saving, pollution-free and possessing concept of green chemistry. The extracted gossypol acetate is yellow crystallization, mp: 171-178 Deg C, maximum adoption in 378 nm, The extracting method is characterized by shorter time and higher extraction rate compared with traditional extracting method, and the used dissolvent can be recovered for reuse.

Description

【Technical field】 [0001] The invention relates to the field of extracting effective components in plants, in particular to a method and a special device for extracting gossypol from cottonseeds through microwave radiation. 【Background technique】 [0002] Gossypol is a dimeric sesquiterpenoid extracted from cottonseed. The content is about 0.5% to 2.5%. [0003] [0004] Gossypol is widely used in industry, agriculture, medicine and scientific research. Overseas studies on the toxicity of gossypol have a history of 100 years. Our country started the research on gossypol anti-fertility drug after the discovery of infertility among people who consumed cottonseed oil in the 1970s. In the 1980s, it entered a climax and published more than 100 related papers. A large number of animals and tens of thousands of clinical experiments have confirmed that gossypol is a highly effective male anti-fertility drug. In particular, it is of great value to utilize the anti-fertility pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/80C07C47/57C07C67/08C07C69/12
Inventor 董庆洁邵仕香周学永
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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