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Method for hydrogenating soybean oil with novel magnetic composite catalyst

A hydrogenated soybean oil and composite catalyst technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve the problems of residual catalysts, difficulty in separation and recovery, etc.

Inactive Publication Date: 2015-05-13
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the difficult problem of residual catalyst in soybean oil after hydrogenation and difficult separation and recovery, and proposes to use magnetic immobilization Ni / PVP-DB-171 / SiO 2 / Fe 3 o 4 hydrogenated soybean oil

Method used

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specific Embodiment approach 1

[0007] Specific implementation mode 1: Immobilizing Ni / PVP-DB-171 / SiO with magnetism 2 / Fe 3 o 4 The method for hydrogenating soybean oil is realized through the following steps: One, the preparation of catalyst: adopt chemical co-precipitation method to prepare Fe 3 o 4 Magnetic particles, as the most basic carrier, are modified with orthoethyl silicate (TEOS) on the basis to obtain SiO 2 / Fe 3 o 4 Core-shell particles; then continue to coat SiO with polyvinylpyrrolidone-vinyltrimethoxysilane (PVP-DB-171) 2 / Fe 3 o 4 Core-shell particles, obtained magnetic composite carrier PVP-DB-171 / SiO 2 / Fe 3 o 4 ; Load metal nickel on its basis to obtain magnetic composite Ni / PVP-DB-171 / SiO 2 / Fe 3 o 4 Catalyst; 2. Use the catalyst for hydrogenation of soybean oil: accurately weigh 100g of oil, accurately weigh a certain mass of magnetic catalyst (catalyst dosage is about 0.05-0.25%), and add the two into a clean and dry autoclave in turn , and seal the reactor, adjust the...

specific Embodiment approach 2

[0008] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the amount of catalyst used in step 2 is 0.1-0.2%, and the Ni / PVP-DB-171 / SiO 2 / Fe 3 o 4 Hydrogenated soybean oil. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0009] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 is that in step 2, the amount of catalyst is 0.1-0.2%, the reaction temperature is 160-200°C, and then magnetic immobilization of Ni / PVP-DB-171 / SiO 2 / Fe 3 o 4 Hydrogenated soybean oil. Other steps are the same as in the first embodiment.

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Abstract

The invention provides a method for hydrogenating soybean oil with a novel magnetic composite catalyst. Hydrogenated oil and the catalyst can be easily separated by the aid of the superparamagnetism of a magnetic carrier of the catalyst, the problem of pollution caused by a traditional oil hydrogenating method to the hydrogenated oil is solved, and the good quality of the hydrogenated oil is guaranteed. Meanwhile, the recovery rate of the catalyst is increased, and the oil hydrogenating production cost is saved. Furthermore, the catalyst shows the more stable activity after reused for 10 times, and the service life of the catalyst is prolonged. According to the method, hydrogenating process parameters such as the consumption of the catalyst, the hydrogen pressure, the reaction time, the reaction temperature and the like are optimized. Under optimal conditions, the soybean oil is hydrogenated with magnetic immobilized Ni / PVP-DB-171 / SiO2 / Fe3O4, the iodine value of the finally obtained hydrogenated soybean oil is 69g I2 / 100g, the content of TFA (trans-fatty acid) is 18.81%, and the method is of great importance to hydrogenation of oil.

Description

technical field [0001] The invention relates to the field of oil processing technology, in particular to a method for hydrogenating soybean oil with a novel magnetic composite catalyst, that is, using magnetically immobilized Ni / PVP-DB-171 / SiO 2 / Fe 3 o 4 Process for hydrogenating soybean oil. Background technique [0002] At present, my country's food industry mainly uses soybean oil, palm oil, and rapeseed oil as raw materials, but the obtained vegetable oil is easy to oxidize, so it is necessary to change the properties of the oil to improve the storage characteristics of the vegetable oil. The main methods of oil modification include fractionation, transesterification and hydrogenation, and oil hydrogenation is the most widely used. Edible oil hydrogenation refers to the process of hydrogen reacting with unsaturated fatty acids in oil under the action of a catalyst to saturate its double bonds to obtain special edible oil products. [0003] The hydrogenation of fats...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/12B01J31/28
CPCC11C3/12B01J31/28B01J2231/645
Inventor 江连洲于殿宇许多现王立琦潘明喆孙丽雪梁宝生周爽
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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