Technology for preparing highly pure crude rice bran oil

Abstract

The invention discloses a technology for preparing highly pure crude rice bran oil. The technology comprises the steps of extraction, purification, acid hydration degumming, dewaxing and depickling, wherein depickling is characterized in that an esterification reaction of alcohols and fatty acids is carried out at 55-65DEG C under normal pressure by using an acidic catalyst, such as benzene sulfonic acid, p-toluenesulfonic acid, solid super acid, and highly acidic resin to remove fatty acids in grease and fatty acids in rice bran oil. The technology for preparing highly pure crude rice bran oil reserves glycerate and other beneficial components in the rice bran oil, and brings a wide development space for realizing optimal reasonable utilization of agriculture resources, maximized rural economic benefits and highest peasant income as an agriculture economy growth point.

Description

technical field [0001] The invention relates to the field of deep processing of agricultural by-products, in particular to a process for preparing high-purity crude rice bran oil. Background technique [0002] Rice bran is an important by-product in the rice processing process. Rice bran is rich in fat, accounting for 18% to 25%. The main component of rice bran oil is fatty acid glyceride. %, linoleic acid 29% to 42%, and also contains vitamins and other ingredients; due to the fatty acid composition and some special ingredients in rice bran oil, rice bran oil has extremely high nutritional value and medicinal value, and is increasingly valued by people; The traditional method is to use rice bran as feed to feed livestock and poultry, which greatly reduces its nutritional value and resource value, resulting in a serious waste of resources, or as fuel or discarded, causing pollution to the environment. [0003] There are three production processes for rice bran oil productio...

AI Technical Summary

Problems solved by technology

[0002] Rice bran is an important by-product in the rice processing process. Rice bran is rich in fat, accounting for 18% to 25%. The main component of rice bran oil is fatty acid glyceride. %, linoleic acid 29% to 42%, and also contains vitamins and other ingredients; due to the fatty acid composition and some special ingredients in rice bran oil, rice bran oil has extremely high nutritional value and medicinal value, and is increasingly valued by people; The traditional method is to use rice bran as feed to feed livestock and poultry, which greatly reduces its nutritional value and resource value, resulting in serious waste of resources, or as fuel or discarded, causing pollution to the environment

[0003] There are three production processes for rice bran oil production: one is mechanical pressing, the other is solvent leaching, and the third is supercritical extraction; these three methods have their own characteristics: the rice bran oil extracted by traditional mechanical pressing has good oil quality, The color is good-looking, edible and pure, but the oil yield is low; the solvent leaching method can greatly increase the oil yield, and it is easy to produce on a large scale, but the color of the oil is darker and the crude oil contains more non-oily substances; supercritical The oil used in the extraction method is better, but it requires high technology and expensive equipment, and it is impossible to produce it on a large scale today.