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Method for hydrogenating soybean oil by nano-nickel catalyst in supercritical CO2 state

A hydrogenated soybean oil and catalyst technology, which is applied in the fields of fatty acid hydrogenation, fatty acid chemical modification, fatty acid production, etc., can solve problems such as damage to human health, achieve the effects of reducing mass transfer resistance, reducing reaction temperature, and increasing reaction rate

Inactive Publication Date: 2017-08-11
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of producing a large amount of trans fatty acids due to the limitation of catalyst and reaction conditions in the process of hydrogenation of fats and oils. The intake of a large amount of trans fatty acids will lead to the occurrence of heart disease and obesity; it may also lead to tumors, breast cancer and senile dementia, which seriously damage human health

Method used

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Effect test

specific Embodiment approach 1

[0009] Specific embodiment one: a kind of supercritical CO 2 The method of applying nano-nickel catalyst to hydrogenate soybean oil under state is realized through the following steps: 1. Pre-reaction treatment: A certain amount of nano-nickel catalyst and a certain amount of first-grade soybean oil are added to the reactor, put into the rotor, and seal the reactor After flushing into CO 2 Ventilate two to three times to ensure that the air in the reactor is completely replaced, and at the same time put the reaction in water to test for leaks; 2. Hydrogenation reaction: fill with CO while ensuring that the reactor is sealed. 2 , then pass into H 2 1MPa-5MPa to make the total pressure in the reactor reach 12MPa, the dosage of nano-nickel catalyst is 0.05%-0.25%, put the reactor in a constant temperature oil bath, at a temperature of 70-110°C, adjust the speed to 100r / min-500r / min , the product was obtained after 70min-110min of reaction; 3. Terminate the reaction: take the re...

specific Embodiment approach 2

[0010] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, H will be charged under the condition that the reactor is sealed. 2 1-5MPa makes the pressure in the reactor reach 12MPa for hydrogenation reaction. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Specific embodiment three: the difference between this embodiment and specific embodiment one is that in step two, the addition amount of nano-nickel catalyst is selected to be 0.10%-0.20% under the condition of hydrogenation reaction, and other steps are the same as specific embodiment one .

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Abstract

The invention provides a method for hydrogenating soybean oil by a nano-nickel catalyst in a supercritical CO2 state. When carbon dioxide reaches a supercritical state, high dissolving capacity can be displayed, mass transfer resistance during catalyst reaction is reduced greatly, catalyst reaction speed is increased, and reaction cycle is shortened without pollution to the environment; due to the unique surface structure of nano-nickel, hydrogen can be adsorbed to the greatest extent, and catalytic efficiency is improved. Hydrogenated oil and fat is obtained through hydrogenation of the nano-nickel catalyst and first-class soybean oil in the supercritical CO2 (SC-CO2) state, and the content of trans-fatty acids in the hydrogenated oil and fat is reduced. The method has the advantages that hydrogenation process parameters such as consumption of the nano-nickel catalyst, reaction time, reaction pressure and reaction temperature are optimized, and the content of the trans-fatty acids in the hydrogenated oil and fat can be reduced to 8.12% when reactions are achieved in an optimal state.

Description

technical field [0001] The invention belongs to the field of refining and processing of edible oils and fats, in particular to 2 Under the state, the method for preparing hydrogenated oil by using nano-nickel catalyst to hydrogenate first-grade soybean oil. Background technique [0002] Oil hydrogenation is a chemical process of oil modification, that is, using reducing nickel and other metals as catalysts to add hydrogen to the double bonds of unsaturated fatty acids in triglycerides, and the resulting modified oils are called hydrogenated oils. Hydrogenation of oil can reduce the degree of unsaturation of oil, increase the melting point, increase the content of solid fat; improve the stability of oil to oxygen and heat; improve the color, aroma and flavor of oil. [0003] The industrial production of hydrogenated oils and fats is carried out under normal conditions using nickel-based catalysts. Catalysts are one of the key conditions for hydrogenation. The hydrogenation o...

Claims

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Application Information

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IPC IPC(8): C11C3/12
CPCC11C3/123
Inventor 江连洲于殿宇李中宾王俊国刘天一
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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