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A kind of method that adopts triglyceride one-pot method to prepare green diesel oil

A triglyceride, green technology, applied in the field of preparing green diesel, can solve the problems of high hydrogen consumption and complicated steps

Active Publication Date: 2021-08-20
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of complex steps and high hydrogen consumption in the prior art, the present invention provides a method for preparing green diesel by adopting a triglyceride one-pot method

Method used

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  • A kind of method that adopts triglyceride one-pot method to prepare green diesel oil
  • A kind of method that adopts triglyceride one-pot method to prepare green diesel oil
  • A kind of method that adopts triglyceride one-pot method to prepare green diesel oil

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Experimental program
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Effect test

Embodiment 1

[0059] Add 10g tristearin, 1g glycerin, 1g 5wt%Ru / Al in 250mL intermittent high temperature and high pressure reactor 2 o 3 Catalyst, 160g H 2 O, and sealed, filled with N into the reactor 2 , keep the initial pressure at 2MPa, and the stirring rate at 500rpm. Heated to 330°C for 5 hours. After the reaction is finished, the reaction product is cooled to room temperature, dissolved in dichloromethane, and filtered to obtain a liquid phase product and a solid catalyst, and the obtained liquid phase product is separated by standing to obtain oil in the organic phase and water in the inorganic phase. The organic phase that separates obtains is analyzed with GC / FID after dichloromethane constant volume, calculates that glyceryl stearate transformation rate is 100%, the yield of green diesel oil (the ratio of the amount of green diesel oil substance and the amount of reactant substance ) is 95.17%.

Embodiment 2

[0061] In a 250mL batch type high temperature and high pressure reactor, add 10g tetradecenoic acid triglyceride, 1g glycerin, 1g5wt%Ru / ZrO 2 Catalyst, 160g H 2 O, and sealed, filled with N into the reactor 2 , keep the initial pressure at 1MPa, and the stirring rate at 300rpm. Heated to 330°C for 10 hours. After the reaction is finished, the reaction product is cooled to room temperature, dissolved in dichloromethane, and filtered to obtain a liquid phase product and a solid catalyst, and the obtained liquid phase product is separated by standing to obtain oil in the organic phase and water in the inorganic phase. The organic phase that separates obtains is analyzed with GC / FID after dichloromethane constant volume, calculates that tetradecenoic acid triglyceride transformation rate is 100%, the yield of green diesel oil (the amount of green diesel oil substance and the amount of reactant substance The ratio of the amount) is 97.23%.

Embodiment 3

[0063] Add 20g soybean oil, 2g glycerin, 1g 5wt% Re / C catalyst, 160g H 2 O, and seal it, charge He in the reactor, keep the initial pressure as 1MPa, and the stirring rate is 400rpm. Heat up to 330°C for 6 hours. After the reaction is finished, the reaction product is cooled to room temperature, dissolved in dichloromethane, and filtered to obtain a liquid phase product and a solid catalyst, and the obtained liquid phase product is separated by standing to obtain oil in the organic phase and water in the inorganic phase. The separated organic phase was fixed to volume with dichloromethane and analyzed by GC / FID, and the yield of green diesel (the ratio of the amount of green diesel substance to the amount of reactant substance) was calculated to be 90.15%.

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Abstract

The invention belongs to the field of resource recovery and utilization of waste oil, and specifically relates to a method for preparing green diesel oil by adopting a one-pot method of triglycerides, which uses a metal-supported catalyst, and under hydrothermal process conditions, the one-pot method realizes the reduction of triglycerides. Hydrolysis and decarboxylation reaction, at the same time, use the glycerol produced by hydrolysis and external hydrogen donor to provide hydrogen for the reaction, and realize the hydrodecarboxylation of unsaturated fatty acids produced by hydrolysis. The cost of green diesel oil is low, and the catalyst of the present invention can be reused, which further reduces the production cost and has great significance for the reuse of triglycerides.

Description

technical field [0001] The invention belongs to the field of resource recovery and utilization of waste oil, and in particular relates to a method for preparing green diesel oil by adopting a one-pot method of triglyceride. Background technique [0002] Triglycerides are fat molecules formed by long-chain fatty acids and glycerol. They are the main components of animal and vegetable oils and are widely found in nature, such as various animal fats, vegetable oils, and microalgae oils. After various animal and vegetable oils are used for high-temperature frying and frying, waste oil whose main component is triglyceride will be produced. If these waste oils are not properly treated, they will pollute the environment, and if they are illegally used and returned to the catering and food processing industries, they will endanger health. [0003] At present, one of the main ways to recycle triglycerides is to prepare biodiesel, and synthesize fatty acid methyl esters or fatty acid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00
CPCY02P30/20
Inventor 张静姚潇毅赵志伟曾宪鹏崔福义
Owner CHONGQING UNIV