Method for molecular distillation and purification of rice bran wax
A technology of molecular distillation and rice bran wax, which is applied in the field of rice bran wax purification process, can solve the problems of many steps, organic residue deoiling, incompleteness, etc., and achieve the effect of simple operation, low organic solvent residue and obvious effect
Inactive Publication Date: 2018-11-20
SHUCHENG JINHE OIL TECH DEV CO LTD
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Problems solved by technology
[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for the molecular distillation and purification of rice bran wax to solve the technical problems of the existing solvent extraction method with many steps, residual organic matter and incomplete deoiling.
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Embodiment 1
[0023] This embodiment provides a method for molecular distillation and purification of rice bran wax, comprising the following steps:
[0024] (1) Mix the rice bran wax paste with industrial hexane at a temperature not lower than 60°C, add an adsorption decolorizing agent and stir, perform decolorization treatment (the first decolorization), filter, remove the adsorption decolorizing agent, and obtain a filtrate. In this example, the volume ratio of rice bran wax paste mixed with industrial hexane is 2:1, and the adsorption decolorizing agent is a mixed decolorizing agent composed of activated clay with a mass fraction of 80% and activated carbon with a mass fraction of 20%. The time is 2h, but not limited thereto. As the solvent of rice bran wax paste, industrial hexane has a coordinating effect in the process of physical adsorption using adsorption decolorizing agent, which can achieve better decolorization effect, and the decolorization efficiency is above 95%.
[0025] (2...
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Abstract
The invention provides a method for molecular distillation and purification of rice bran wax, and belongs to the technical field of rice bran wax purification processes. The method comprises the following steps: removing pigment from rice bran wax paste serving as a raw material under combined action of industrial hexane and an adsorption decolorant, then removing grease from the rice bran wax paste by using an industrial hexane mixed solvent of ethanol in a volume ratio of 90 percent, and finally refining the rice bran wax paste by using a three-stage molecular distillation technology to thoroughly remove impurities such as the grease and the pigment from the rice bran wax paste, and finally obtain a high-quality rice bran wax product through twice decoloring and twice degreasing. Compared with a traditional solvent extraction method, the method provided by the invention has the advantages of simple operation, high extraction purity, low organic solvent residue content and the like; particularly, the removal effect on the grease and the pigment in the rice bran wax is obvious; the high-quality rice bran wax product with whiteness more than 35 can be obtained.
Description
technical field [0001] The invention relates to a process for purifying rice bran wax, in particular to a method for purifying rice bran wax by molecular distillation. Background technique [0002] Rice bran wax is an important by-product of rice oil processing. The main component of rice bran wax is esters composed of higher fatty alcohols and higher fatty acids. It has a high melting point and precipitates out at room temperature. Rice bran wax is extracted from rice bran wax paste, a 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 chemical, chemical and other aspects. [0003] The extraction and refining process of rice bran wax is mainly divided into three steps: degumming, deoiling, and decolorizing, and the deoiling and decolorizing processes are the most important. Wherein the deoiling method mainly includes pressure filter saponification method and solvent extraction m...
Claims
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IPC IPC(8): C11B11/00
CPCC11B11/00Y02W30/74
Inventor 付成良陈文彬曹川
Owner SHUCHENG JINHE OIL TECH DEV CO LTD