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A kind of process method of rice oil esterification deacidification

A process method, rice oil ester technology, applied in chemical instruments and methods, fatty acid esterification, fat oil/fat refining, etc., can solve the problems of difficult catalyst separation and long reaction time

Active Publication Date: 2016-08-17
GAOAN QINGHE GREASE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the literature of Chinese Invention Patent Publication No. CN101319167B reports a high acid value rice bran oil deacidification process, which uses ZnO as a catalyst for 4-6 hours of reaction under high temperature and vacuum conditions, although the acid value of rice oil can be reduced from 38.14mgKOH / g is reduced to 5-7mgKOH / g, but the reaction time is longer and the catalyst is not easy to separate

Method used

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  • A kind of process method of rice oil esterification deacidification

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Effect test

Embodiment 1

[0021] refer to figure 1 , a process for esterification and deacidification of rice oil is realized in the following steps:

[0022] 1. Preparation of degummed oil: full-fat rice bran→pretreatment→conditioning→extrusion treatment→drying→stabilized full-fat rice bran→leaching→rice bran crude oil→dewaxing, degumming→degumming oil;

[0023] 2. Absorbing magnetic nano-catalyst Fe 3 o 4 / Preparation of ZnO:

[0024] a. Configure 20g / L PEG-4000 aqueous solution, and use this PEG-4000 aqueous solution to prepare FeCl with a concentration of 1.0mol / L 2 4H 2 O and 0.5mol / L FeCl 3 ·6H 2 solution of O, and the Fe 2+ with Fe 3+ Mix evenly at a molar ratio of 1:2 to obtain a mixed iron ion solution, then add ammonia water with a mass fraction of 25% to the above mixed iron ion solution dropwise, adjust the pH of the solution to 10.0, the solution gradually turns black, and stir magnetically for 1 hour to obtain Fe 3 o 4 Nanoparticles, after using a magnetic field to separate th...

Embodiment 2

[0031] A kind of processing method of rice oil esterification deacidification, realizes according to following steps:

[0032] The difference with Example 1 is:

[0033] Using the degummed oil and glycerol prepared in step 1 as raw materials, the wave-absorbing magnetic nanocatalyst Fe prepared in step 2 3 o 4 / ZnO is placed in a microwave synthesis instrument with a condensing reflux device for microwave esterification, microwave frequency 2.45GHz, microwave output power 400W, stirring speed 500rpm min -1 , where the added amount of glycerol is the theoretical added amount of glycerin, and the wave-absorbing magnetic nanocatalyst Fe 3 o 4 The addition amount of / ZnO is 0.7% of the mass of the degummed oil, the reaction temperature is 443K, and the reaction time is 20min. Place 50g of degummed oil with an acid value of 13.52mgKOH / g in the above-mentioned microwave synthesis instrument with a vacuum degree of 0.1Mpa, add glycerin and wave-absorbing magnetic nano-catalyst Fe...

Embodiment 3

[0035] A kind of processing method of rice oil esterification deacidification, realizes according to following steps:

[0036] The difference with Example 1 is:

[0037] Using the degummed oil and glycerol prepared in step 1 as raw materials, the wave-absorbing magnetic nanocatalyst Fe prepared in step 2 3 o 4 / ZnO is placed in a microwave synthesis instrument with a condensing reflux device for microwave esterification. The microwave reactor frequency is 2.45GHz, the microwave output power is 500W, and the stirring speed is 500rpm min -1 , where the added amount of glycerol is the theoretical added amount of glycerin, and the wave-absorbing magnetic nanocatalyst Fe 3 o 4 The addition amount of / ZnO is 0.7% of the mass of the degummed oil, the reaction temperature is 443K, and the reaction time is 30min. Place 50g of degummed oil with an acid value of 10.47mgKOH / g in the above-mentioned microwave synthesis instrument with a vacuum degree of 0.1Mpa, add glycerin and wave-ab...

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Abstract

A process for esterification and deacidification of rice oil, mainly aimed at the problems of high energy consumption, low oil refining rate, long reaction time, and difficult separation of catalysts in the existing deacidification technology, and provides a process for esterification and deacidification of rice oil . The method uses degummed oil and glycerol as raw materials, and uses a wave-absorbing magnetic nanocatalyst Fe 3 o 4 / ZnO for microwave esterification, in a microwave reactor with a reflux reaction device, the esterification is heated at a certain stirring speed. The acid value of the obtained rice oil is 3-5 mgKOH / g. The method uses a magnetic nano-catalyst, which has high catalytic esterification efficiency, and the catalyst is easy to separate and recover. Compared with conventional heating methods, microwave heating has the characteristics of fast heating rate, uniform heating and no hysteresis, which can significantly shorten the reaction time and increase the yield. and reduce by-product formation.

Description

technical field [0001] The invention relates to a process method for esterification and deacidification of rice oil, which belongs to the technical field of vegetable oil refining. Background technique [0002] my country's rice output ranks among the top in the world, and the annual output of rice bran is more than 100 million tons, ranking first in the world. However, the utilization rate of rice bran in my country is not high, and most of it is used as feed for livestock and poultry. As a nutritional and health care oil, rice oil has huge market space and good market prospects both at home and abroad, and has been recognized by more and more people. [0003] Because rice bran is very easy to rancid, it brings difficulties to the refining of rice oil, making the refining rate of rice oil low. Traditional rice oil deacidification methods mainly include chemical alkali refining and physical distillation. Deacidification by chemical alkali refining consumes a large amount o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B3/02C11B3/00C11C3/04B01J23/80
Inventor 肖志刚于金平曹慧英李德敏周麟依
Owner GAOAN QINGHE GREASE CO LTD