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Method for preparing fatty alcohol through hydrogenation of fatty acid methyl ester in presence of temperature control catalytic system

A technology of fatty acid methyl ester and catalytic system, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of short catalyst life, large mass transfer and diffusion resistance, etc. The effect of good performance and good temperature control performance

Inactive Publication Date: 2014-08-06
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, based on this characteristic, this patent uses the imidazole-type temperature-controlled ionic liquid containing polyoxyethylene ether chain segments as a stabilizer for Pd nanoparticles, and prepares a temperature-controlled ionic liquid catalytic system containing Pd nano-metal particles, and uses It is used to catalyze the hydrogenation reaction of fatty acid methyl esters to prepare fatty alcohols, so as to solve the problems of heterogeneous catalysts such as large mass transfer and diffusion resistance, and short catalyst life.

Method used

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  • Method for preparing fatty alcohol through hydrogenation of fatty acid methyl ester in presence of temperature control catalytic system
  • Method for preparing fatty alcohol through hydrogenation of fatty acid methyl ester in presence of temperature control catalytic system

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Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1: the temperature control ionic liquid catalytic system Pd / IL PEG-750 (Pd content is 1%) 1.0g and fatty acid methyl ester 10.0g are added to the reaction kettle, and after being replaced with 1-2MPa hydrogen for 5 times, then filled with 6Mpa hydrogen, kept at 210°C for 4 hours, after the reaction, take out the reaction vessel Kettle, cooled to room temperature, depressurized to open the kettle, the upper product was taken out, and the organic solvent was removed by distillation under reduced pressure to obtain the product fatty alcohol, and the hydroxyl value and iodine value were measured. The product fatty alcohol had a hydroxyl value of 195mgKOH / g and an iodine value of 20g / 100g. The catalyst in the lower layer is re-added to the reactants without any treatment, and is directly recycled.

Embodiment 2

[0027] Embodiment 2: the temperature control ionic liquid catalytic system Pd / IL PEG-750 (Pd content is 5%) 0.8g, fatty acid methyl ester 10.0g are added to the reaction kettle, after 5 times of replacement with 1-2MPa hydrogen, then filled with 5Mpa hydrogen, 200 ℃ heat preservation reaction for 5h, after the reaction, take out the reaction kettle Kettle, cooled to room temperature, depressurized and opened the kettle, the upper product was taken out, and the organic solvent was removed by distillation under reduced pressure to obtain the product fatty alcohol. The hydroxyl value and iodine value of the product fatty alcohol were measured, and the product fatty alcohol had a hydroxyl value of 170mgKOH / g and an iodine value of 30g / 100g. The catalyst in the lower layer is re-added to the reactants without any treatment, and is directly recycled.

Embodiment 3

[0028] Embodiment 3: the temperature control ionic liquid catalytic system Pd / IL PEG-400(Pd content is 10%) 1.2g and fatty acid methyl ester 10.0g are added to the reaction kettle, replaced with 1-2MPa hydrogen for 5 times, then filled with 4Mpa hydrogen, and kept at 190°C for 6h. After the reaction, take out the reaction kettle Kettle, cooled to room temperature, depressurized and opened the kettle, the upper product was taken out, and the organic solvent was removed by distillation under reduced pressure to obtain the product fatty alcohol, and the hydroxyl value and iodine value were measured. The product fatty alcohol had a hydroxyl value of 148mgKOH / g and an iodine value of 38g / 100g. The catalyst in the lower layer is re-added to the reactants without any treatment, and is directly recycled.

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Abstract

The invention provides a method for preparing fatty alcohol through hydrogenation of fatty acid methyl ester in presence of a temperature control catalytic system. The method is characterized by adopting Pd metal nanoparticles stabilized by imidazolyl temperature control ionic liquid containing different length of polyoxyethylene ether chain segments as catalysts to catalyze hydrogenation of fatty acid methyl ester to prepare fatty alcohol under the conditions of 10.0g of fatty acid methyl ester, 0.4-1.2g of temperature control ionic liquid catalytic system (containing 0.2-10% of Pd metal nanoparticles by mass), hydrogen pressure of 4-8MPa, reaction temperature of 190-230 DEG C and reaction time of 2-6 hours and carrying out separation, recovery and cyclic utilization on the temperature control ionic liquid catalytic system containing the Pd metal nanoparticles. Compared with the prior art, the method has the characteristics that 1. the catalytic system can achieve high temperature homogeneous reaction and low temperature two phase separation; 2. the temperature control ionic liquid avoids agglomeration of the Pd nanoparticles; 3. after reaction, the catalytic system has good cyclic use property and belongs to the environment-friendly process route.

Description

technical field [0001] The invention relates to a method for preparing fatty alcohol by hydrogenating fatty acid methyl ester under a temperature-controlled catalytic system, that is, a method for preparing fatty alcohol by using a temperature-controlled ionic liquid catalytic system containing Pd nanometer metal particles to catalyze the hydrogenation reaction of fatty acid methyl ester. Background technique [0002] Fatty alcohol is the main basic raw material for the production of various fine chemicals such as plasticizers, detergents and surfactants. Its consumption is large and its added value is high. It plays an important role in the national economy and is widely used in medicine, food, cosmetics, Plastic antioxidants and other industries. At present, its production methods are mainly natural oil route and synthetic route. From the perspective of environmental protection, the fatty acid methyl ester prepared by natural oil route has the advantages of high economic v...

Claims

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Application Information

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IPC IPC(8): C07C29/149B01J31/06B01J31/02
CPCC07C29/149B01J23/44B01J31/0285B01J31/068B01J35/393
Inventor 于世涛刘仕伟李露解从霞姚琳姜蕊
Owner QINGDAO UNIV OF SCI & TECH
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