Method for extracting raffinose from cottonseed wastewater

A technology of raffinose and cottonseed, which is applied in the direction of chemical instruments and methods, oligosaccharides, sugar derivatives, etc., can solve the problems of reduced solubility of raffinose, unsuitability for industrialization, and increased recycling costs, and facilitate large-scale industrial production and production The effect of cost reduction and avoiding re-drying

Pending Publication Date: 2011-04-06
楼响瑜
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Problems solved by technology

[0005] The main problems in the above methods and processes are: (1) purely using defatted cottonseed meal to produce raffinose, after extraction, a large amount of wet meal needs to be dried to recover the solvent, which increases the loss of energy; (2) simply decolorizing with activated carbon cannot achieve Ideal decolorization effect, and the use of organic solvents and resin regeneration steps are increased in combination with resin adsorption and separation, resulting in large losses and complicated operations; (3) using alcohol solution as crystallization agent, due to the reduced solubility of raffinose, the amount of alcohol used is large, The cost of recycling is increased, and the requirements for equipment are high, so it is not suitable for industrialization

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  • Method for extracting raffinose from cottonseed wastewater

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Embodiment Construction

[0025] Hereinafter, the content of the invention will be described in detail through implementation examples, but the invention is not limited thereto.

[0026] (1) Take 200L of waste water, the measured solid content is 3.3%, heat it to about 75°C, adjust the pH value to 4.4 with hydrochloric acid, add 0.64Kg calcium chloride while stirring, keep this temperature for about 30min, then add 0.2 Kg diatomaceous earth, 178L of pretreatment solution was obtained after plate and frame filtration; the pretreatment solution was concentrated at a temperature of about 75°C at a vacuum of -0.07Mpa to obtain 16.4L of raffinose solution, and the measured solid concentration was 26.7%. .

[0027] (2) After adjusting the pH to 6.5 with calcium oxide, add polyaluminum, at this time the temperature is 64°C, after stirring for about 40 minutes, let it stand for 30 minutes, and centrifuge to obtain 15.1L of filtrate, heat the filtrate to 75°C, and use Adjust the pH value of the solution to 3.4...

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Abstract

The invention discloses a method for extracting raffinose from cottonseed wastewater, which comprises the following steps of: performing protein removal and impurity removal pretreatment on the cottonseed wastewater, decolorizing raffinose pretreatment liquid by using polymeric aluminum and activated carbon, and crystallizing and recrystallizing in aqueous solution to obtain a raffinose crystal with the high purity of over 98 percent; and desalting residue liquid after crystallization by using macroporous resin, and performing spray drying to obtain light yellow raffinose powder with over 30 percent of raffinose, wherein the total recovery rate of two raffinose products is over 85 percent. The problems of impurity removal and decolorization of the wastewater generated by processing cottonseeds are effectively solved, high-quality raffinose is produced through crystallization by taking water as a solvent, the process is simple and has low cost, and industrial production is easy to realize.

Description

technical field [0001] The invention relates to a method for extracting raffinose, in particular to a method for extracting raffinose from cottonseed wastewater. technical background [0002] Cottonseed wastewater is produced during the process of oil extraction and dephenolization of cottonseed to produce cottonseed protein, and can also be obtained by extracting defatted cottonseed meal with hot water or alcohol aqueous solution. Cottonseed wastewater is usually treated by direct discharge or traditional biochemical methods. In recent years, with the continuous development of the oligosaccharide industry and the deepening of people's understanding of the functions and health effects of oligosaccharides, scholars have paid more and more attention to the comprehensive utilization of cottonseed processing waste, especially for cottonseed processing wastewater and degreased cottonseed Comprehensive utilization and development of meal. [0003] The solid content of cottonseed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H3/06C07H1/06
Inventor 楼响瑜
Owner 楼响瑜
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