Method of preparing soyabean isoflarone from low temperature soya dreg

A technology of soybean isoflavones and low-temperature soybean meal, applied in the direction of organic chemistry, can solve the problems of difficult cost reduction, few sources of raw materials, difficult production scale, etc., and achieve the effects of simplifying subsequent processes, facilitating recycling, and easy operation

Inactive Publication Date: 2006-08-30
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses hypocotyls with high isoflavone content as raw material, although it can solve the problem of some organic solvent residues, but the source of raw materials is small, and it is difficult to form a large production scale; and the two extractions still use expensive organic solvents, which is difficult to reduce cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Ethanol solution extraction

[0029] Crush the low-temperature soybean meal and pass through a 40-60 mesh sieve.

[0030] In the annular extractor (the equipment used is produced by Zhejiang Yuyao Grain Machinery Factory, the model is YJPT 5, and the processing capacity is 5T / D), 5t of low-temperature soybean meal and 20000L of ethanol aqueous solution of 70% (mass percentage concentration) of extractant are placed at 65°C Continuous 8-stage countercurrent leaching can be carried out under the pressure to obtain a high-concentration leaching solution; the ethanol in the leaching solution is removed by concentration under reduced pressure to obtain a concentrated aqueous solution of low-temperature soybean meal.

[0031] (2) Calcium hydroxide flocculation

[0032] Add powdered calcium hydroxide to the concentrated solution to adjust the pH value to 8-10, carry out flocculation, and after standing for 1 hour, centrifuge at a speed of 4000r / min for 30 minutes to obtai...

Embodiment 2

[0038] (1) Ethanol solution extraction

[0039] Crush the low-temperature soybean meal and pass through a 40-60 mesh sieve.

[0040]In the flat-rotating extractor (the equipment used is produced by Zhejiang Yuyao Grain Machinery Factory, the model is YJPT5, and the processing capacity is 5T / D), 5t of low-temperature soybean meal and 25000L of extractant 55% ethanol aqueous solution are continuously processed for 16 stages at 80°C. Countercurrent leaching can obtain a high-concentration leaching solution; vacuum concentration removes all ethanol in the leaching solution to obtain a concentrated aqueous solution of low-temperature soybean meal.

[0041] (2) Calcium hydroxide flocculation

[0042] Add powdered calcium hydroxide to the concentrated solution to adjust the pH value to 8-10, carry out flocculation, and filter after standing for 1 hour to obtain a yellow sludge-like precipitate and a yellow (slightly turbid) filtrate. Add 20% hydrochloric acid to the filtrate , adju...

Embodiment 3

[0048] (1) Ethanol solution extraction

[0049] Crush the low-temperature soybean meal and pass through a 40-60 mesh sieve.

[0050] In the flat-rotating extractor (the equipment used is produced by Zhejiang Yuyao Grain Machinery Factory, the model is YJPT5, and the processing capacity is 5T / D), 2.5t of low-temperature soybean meal and 7500L of extractant 85% ethanol aqueous solution are continuously processed at 50°C for 16 Level countercurrent leaching can obtain high-concentration leaching solution; vacuum concentration removes all ethanol in the leaching solution to obtain a concentrated aqueous solution of low-temperature soybean meal.

[0051] (2) Calcium hydroxide flocculation

[0052] Add powdered calcium hydroxide to the concentrated solution to adjust the pH value to 10-12, carry out flocculation, and filter after standing for 1 hour to obtain a yellow sludge-like precipitate and a yellow (slightly turbid) filtrate; add 20% hydrochloric acid to the filtrate , adjus...

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Abstract

The present invention relates to a method for preparing soybean isoflavone by using low-temperature soybean dregs. Said method is characterized by using low-temperature soybean dregs as raw material and adopting the combination of ethyl alcohol aqueous solution extraction, flocculation under the alkaline condition, ethyl acetate extraction and petroleum ether recrystallization refinery to prepare soybean isoflavone.

Description

Technical field: [0001] The invention relates to a method for preparing soybean isoflavones from low-temperature soybean meal. Background technique: [0002] Isoflavones are mainly found in legumes. Scientists call them phytoestrogens. Among them, soybeans have the highest content, so they are especially called soybean isoflavones (soybean isoflavones). It mainly contains three aglycones (daidzein aglycone, dye Lignin aglycone and glycidin), collectively referred to as soybean isoflavone aglycone, also contains three glycosides (daidzein, genistin and glycidin), collectively referred to as soybean isoflavone glycosides. [0003] Studies in recent years have shown that soybean isoflavones can be transformed into hormone-like compounds by intestinal bacteria, have weak estrogen and antioxidant activity, can block angiogenesis, and cut off nutrient sources, thereby delaying or preventing tumors from turning into cancer , can effectively inhibit the occurrence of leukemia, colo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D311/36
Inventor 袁其朋吕苗苗贾乃堃
Owner BEIJING UNIV OF CHEM TECH
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