Light rice bran cerotic acid wax and preparation method thereof

Abstract

The invention provides a preparation method of light rice bran cerotic acid wax. The method includes the following steps of deoiling, oxidation and acid pickling and water scrubbing. During deoiling,deoiled rice bran wax to be discolored is soaked in ethyl acetate, heated for melting and then cooled and sliced for use. During oxidation, the sliced rice bran wax and dilute sulphuric acid are heated to enable the rice bran wax to be melted, then the rice bran wax is added into a sodium bichromate solution and then constantly stirred, the color of the rice bran wax turns light from brown, and natural cooling and standing are conducted to make the wax delaminated from a chromium slurry solution. During acid pickling and water scrubbing, the oxidized rice bran wax is heated into a liquid thenput into dilute sulphuric acid and stirred, standing is carried out to make the wax delaminated from a water scrubbing liquid, then the mixture is added with water, stirred and heated at the same timetill the wax is totally melted, stirring continues to be conducted, standing is carried out to make the wax delaminated from the water scrubbing liquid, and the oxidized rice bran wax at the upper layer is sliced and packed after being cooled. The invention further provides the light rice bran cerotic acid wax. According to the method, the rice bran wax is oxidized by sodium bichromate to generate the rice bran cerotic acid wax which is light in color, odorless and hard in texture, micromolecular materials are effectively removed, the emulsibility and the luster are obviously improved, and deep processing is facilitated.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a light-colored rice bran wax and a preparation method thereof. Background technique [0002] Rice bran wax is a crystalline wax present in rice bran oil. It is a by-product wax paste obtained by dewaxing rice bran oil. The wax paste contains 30-50% rice bran oil. After deoiling by solvent method, crude oil containing less than 5% is obtained. Rice bran wax. The main components of coarse rice bran wax are long-chain fatty acid esters composed of higher fatty acid alcohols and higher fatty acids, and also contain other small molecular components such as various pigments and gums. Refined rice bran wax is generally deoiled by solvent method first, and then bleached with hydrogen peroxide to obtain light yellow refined rice bran wax. But the inventor of the present invention has found through research that the light-colored rice bran wax obtained by this method is difficult ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the technical problem that the existing refined rice bran wax is sticky due to the existence of small molecular substances such as resins, which affects the hardness and gloss, and has a strong taste, which limits the scope of use, the invention provides a light-colored Preparation method of rice bran wax