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Method for extracting raffinose

An extraction method and technology of raffinose, applied in the direction of chemical instruments and methods, oligosaccharides, sugar derivatives, etc., can solve the problems of complex operation, low yield of raffinose, high energy loss, etc., and achieve simple operation and short process route , Good product quality

Inactive Publication Date: 2017-07-21
合肥云都棉花有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the above problems, the technical problem to be solved in the present invention is a method for extracting raffinose, which overcomes the problems of high energy loss, complicated operation and low yield of raffinose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for extracting raffinose, comprising the steps of:

[0025] Step 1: Pretreatment, put the weighed cottonseed meal in the insulation reactor, and add the ethanol solution with a concentration of 75%, adjust the temperature in the insulation reactor to 30°C, soak for 20 minutes under stirring to obtain cottonseed solution;

[0026] Step 2: decolorization, adding a decolorizing agent to the cottonseed solution, adjusting the pH value to 6 and adding 5% activated carbon powder by weight, stirring for 30 minutes, standing and filtering to obtain a colorless cottonseed solution;

[0027] Step 3: For the first crystallization, the decolorized raffinose solution is concentrated under reduced pressure to a solid content of 40%, and then vacuum centrifuged after cooling down to 0°C to obtain crude raffinose crystals. After the porous resin is desalted, a desiccant is sprayed to obtain raffinose powder;

[0028] Step 4: The second crystallization, the crude product of r...

Embodiment 2

[0037] A method for extracting raffinose, comprising the steps of:

[0038] Step 1: Pretreatment, put the weighed cottonseed meal in the insulation reactor, and add the ethanol solution with a concentration of 77%, adjust the temperature in the insulation reactor to 40°C, and soak for 35 minutes under stirring to obtain cottonseed solution;

[0039] Step 2: decolorization, adding a decolorizing agent to the cottonseed solution, adjusting the pH value to 7 and adding 10% by weight of activated carbon powder, stirring for 40 minutes, standing and filtering to obtain a colorless cottonseed solution;

[0040] Step 3: For the first crystallization, the decolorized raffinose solution is concentrated under reduced pressure to a solid content of 50%, and then vacuum centrifuged after cooling down to 5°C to obtain crude raffinose crystals. After the porous resin is desalted, a desiccant is sprayed to obtain raffinose powder;

[0041] Step 4: The second crystallization, the crude prod...

Embodiment 3

[0050] A method for extracting raffinose, comprising the steps of:

[0051] Step 1: Pretreatment, put the weighed cottonseed meal in the insulation reactor, and add the ethanol solution with a concentration of 80%, adjust the temperature in the insulation reactor to 55°C, soak for 45min under stirring to obtain cottonseed solution;

[0052] Step 2: decolorization, adding a decolorizing agent to the cottonseed solution, adjusting the pH value to 8 and adding 15% by weight of activated carbon powder, stirring for 60 minutes, standing and filtering to obtain a colorless cottonseed solution;

[0053] Step 3: For the first crystallization, the decolorized raffinose solution is concentrated under reduced pressure to a solid content of 70%, and then vacuum centrifuged after cooling down to 10°C to obtain crude raffinose crystals. After the porous resin is desalted, a desiccant is sprayed to obtain raffinose powder;

[0054] Step 4: The second crystallization, the crude product of r...

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Abstract

The invention discloses a method for extracting raffinose. The method includes steps of 1, carrying out pretreatment; 2, carrying out decolorization; 3, carrying out primary crystallization, to be more specific, concentrating decolorized raffinose solution under reduced pressures until the solid content is 40-70%, cooling the raffinose solution until the temperature of the raffinose solution reaches 0-10 DEG C, carrying out vacuum centrifugal separation on the raffinose solution to obtain raffinose crystallization crude products, desalting centrifuged residual liquid by the aid of macroporous resin and then spraying drying agents to obtain raffinose powder; 4, carrying out secondary crystallization, to be more specific, dissolving the raffinose crystallization crude products in water at the temperature of 60-80 DEG C to obtain crystallization systems with the solid contents of 43-60 DEG C, carrying out first-section cooling on the crystallization systems, joining the crystallization systems with crystal nucleuses, carrying out second-section cooling on the crystallization systems, drying the crystallization systems under normal pressures, centrifuging a finished product which is the raffinose and then crystallizing residual liquid at the step 3. The method for extracting the raffinose has the advantages of short process route, simplicity in operation, low requirements on equipment and low cost.

Description

technical field [0001] The invention belongs to the field of cottonseed processing, and in particular relates to a method for extracting raffinose. Background technique [0002] Raffinose widely exists in nature, is a good bifidobacteria proliferation factor, and has multiple functions such as regulating the intestines and improving the body's immunity. In fact, it is a non-reducing sugar formed by the condensation of three monosaccharides, galactose, glucose and fructose. Pure raffinose is a long needle-like crystal, white or light yellow, with 5 molecules of crystal water; it is easily soluble in water, slightly soluble in ethanol and other polar solvents, and is very stable in heat and acid environments. The sweetness is 22%~23% of sucrose, and it is non-hygroscopic. [0003] Raffinose is the most well-known trisaccharide in nature. It is composed of galactose, fructose and glucose. It exists in most plants. It is also known as raffinose, raffinose and raffinose. . Ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H3/06C07H1/08
CPCC07H3/06C07H1/08
Inventor 程飞
Owner 合肥云都棉花有限公司
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