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Method for extracting raffinose from cottonseed scum

A technology of raffinose and cottonseed meal, which is applied in chemical instruments and methods, oligosaccharides, sugar derivatives, etc., can solve the problems of difficulty in extraction and utilization of raffinose, low quality of cottonseed meal, environmental impact, etc., and achieves easy operation. , the effect of reducing content and improving quality

Inactive Publication Date: 2008-09-17
北京中棉紫光生物科技有限公司
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Problems solved by technology

Provided in the prior art is a mature production method that adopts 6# solvent oil to extract oil and adopts methanol dephenolization to obtain cottonseed protein, but, for the extraction of raffinose contained in cottonseed, lacks a method suitable for industrial production; on the one hand , there are some raffinose and gossypol in the cottonseed meal, the quality of the cottonseed meal is not high, and the discharged waste liquid contains raffinose, which has a certain impact on the environment; on the other hand, raffinose has a wide range of applications in food, feed, health care and other fields application prospects
However, methanol, gossypol, and other impurities are mixed together with raffinose, causing certain difficulties in the extraction and utilization of raffinose

Method used

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  • Method for extracting raffinose from cottonseed scum
  • Method for extracting raffinose from cottonseed scum

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Embodiment Construction

[0027] The extraction method of the present invention will be specifically described below with the case of processing 150 tons of high-quality cottonseed per day.

[0028] The yield of cottonseed oil is 15-20%, the yield of dephenolized cottonseed meal is 37-42%, the yield of rough raffinose is 0.5-1.0%, and the yield of refined raffinose is 0.3-0.8%.

[0029] Process 150 tons of high-quality cottonseed per day to obtain 22.5-30 tons of cottonseed oil, 55.5-63 tons of dephenolized cottonseed meal, 0.75-1.50 tons of rough raffinose, and 0.45-1.2 tons of refined raffinose. The extraction steps are divided into pretreatment of cottonseed, leaching and refining.

[0030] 1. Pretreatment

[0031] process such as figure 1 As shown, the technical requirements for pretreatment are as follows:

[0032] 1. Cottonseed contains impurities ≤ 0.5% after cleaning, cottonseed scraps contain oil ≤ 0.5%

[0033] 2. After the cottonseed is peeled and separated, the kernel content in the she...

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Abstract

A method for extracting raffinose from cottonseed meal is characterized in including the following steps: (1) extracting oil from the cottonseed meal, and extracting in 85-95 wt% methanol at the room temperature to 65 DEG C for 30-100 min. to obtain methanol extractive solution containing phenol and raffinose; (2) distilling at 80-100 DEG C for removing methanol and gossypol, and concentrating to obtain the raffinose crude product; (3) dissolving into water and / or diluted acid at the room temperature to 80 DEG C to adjust the pH value to 2-7; and (4) filtering, decoloring, concentrating, crystallizing, and drying to obtain refined raffinose. The method has the advantages of complete removal of methanol and gossypol from raffinose, high yield of raffinose, remarkable economic benefit, convenient operation, and suitability for large-scale industrialized production.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of cottonseed, in particular to a method for extracting raffinose from cottonseed meal, in particular to a method for extracting raffinose from cottonseed meal after oil extraction. Background technique [0002] my country is a big cotton-producing country, and the cottonseed resources are very rich. Cottonseeds are rich in protein, raffinose and other ingredients that can be comprehensively utilized. Provided in the prior art is a mature production method that adopts 6# solvent oil to extract oil and adopts methanol dephenolization to obtain cottonseed protein, but, for the extraction of raffinose contained in cottonseed, lacks a method suitable for industrial production; on the one hand , there are some raffinose and gossypol in the cottonseed meal, the quality of the cottonseed meal is not high, and the discharged waste liquid contains raffinose, which has a certain impact on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H3/06C07H1/08
Inventor 祝强武心源焦洋孙宁祥张家红杨桂成
Owner 北京中棉紫光生物科技有限公司
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