Method for decolorizing rice bran wax

A rice bran wax, adsorption and decolorization technology, applied in the field of decolorization, can solve the problems of restricting the application range of products, metal ion pollution, low product purity, etc., and achieves the effects of good quality, high purity, and extended application range.

Active Publication Date: 2014-08-13
舒城县金禾油脂科技开发有限公司
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Problems solved by technology

[0004] For the decolorization method of rice bran wax, the strong oxidant oxidation method is mostly used at present. This method requires a large amount of water washing to remove metal ions, produces a large amount of waste water, and is prone to metal ion pollution at the same time. If the water washing is not thorough, the product purity is

Method used

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Embodiment 1

[0017] The decolorization method of rice bran wax in this embodiment includes the following steps:

[0018] (1) Dehydration treatment: heating the rice bran wax paste to 110°C and dehydrating for 1 hour to obtain a dehydrated wax paste;

[0019] (2) Deoiling treatment: cooling the wax paste dehydrated in step (1) to 60°C, adding 5 times the weight of industrial hexane, stirring at 60°C at 60 rpm for 50 minutes to obtain a rice bran wax solution, and then cooling the rice bran wax solution to Stir and crystallize at 0°C and 10rpm for 2 hours to obtain the crystal liquid. Finally, the crystal liquid is centrifuged. The supernatant liquid of the centrifugal separation is a mixed oil containing industrial hexane. The mixed oil is pumped into a rising film evaporator for desolvation. The industrial hexane in the mixed oil will be separated by evaporation, recovered by condensation, and can be recycled. The remaining mixed oil can be sold as crude oil. The precipitate obtained by centrif...

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PUM

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Abstract

The invention discloses a method for decolorizing rice bran wax. The method comprises the steps of dehydrating rice bran wax paste, adding an industrial hexane solvent for removing oil, then adding an adsorption decolorizing agent for decolorizing in the presence of the industrial hexane solvent, and finally performing solid-liquid separation and evaporation to remove the solvent, thus obtaining decolorized rice bran wax. Compared with the prior art, the method has the advantages that the method does not adopt any oxidant, no heavy metals are left, a large amount of wastewater is not produced, the production cost is reduced, and the pollutants are reduced; and meanwhile, a white rice bran wax product with the whiteness of nearly 32 can be obtained by adopting the method, the purity of the product is high, and the application range of the product is expanded.

Description

Technical field [0001] The invention relates to a decolorization method, in particular to a decolorization method of rice bran wax. Background technique [0002] Rice bran wax is an important by-product of rice oil processing. The main component of rice bran wax is an ester composed of higher fatty alcohols and higher fatty acids. It has a high melting point and precipitates at room temperature. Rice bran wax is obtained from the by-product of rice bran oil refining. Yes, the extracted rice bran wax has its due value in many aspects, such as being widely used in food, daily chemicals, and chemical industries. [0003] The extraction and refining process of rice bran wax is mainly divided into three steps: degumming, deoiling and decoloring. The deoiling and decolorizing process is the most important. The deoiling methods mainly include filter press saponification method and solvent extraction method. The filter press saponification method is based on the unsaponifiable of rice bra...

Claims

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Application Information

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IPC IPC(8): C11B11/00
Inventor 付成良陈文彬
Owner 舒城县金禾油脂科技开发有限公司
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