A kind of method of unsaturated fatty acid decarboxylation

An unsaturated fatty acid and decarboxylation technology, which is applied in the hydrogenation of fatty acids, the preparation of liquid hydrocarbon mixtures, base materials, etc., can solve the problems of hydrogen consumption and slow reaction rate, and achieve the effect of ensuring economy, fast rate and high solubility

Active Publication Date: 2021-07-30
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method for efficient decarboxylation of unsaturated fatty acids, aiming at the problem of hydrogen consumption in existing hydrogen-facing hydrothermal technology and slow reaction rate of non-hydrogen-facing hydrothermal technology

Method used

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  • A kind of method of unsaturated fatty acid decarboxylation

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Effect test

Embodiment 1

[0041] Add 10g oleic acid, 1g glycerol, 1g 5wt%Ru / C 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. Heat up to 330°C for 3 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 is analyzed by GC / FID after dichloromethane constant volume, and the conversion rate of oleic acid is 100%, and the yield of long-chain alkane is calculated (the ratio of the amount of long-chain alkane substance and the amount of reactant substance) 89.8%, including C7 0.60%, C8 0.82%, C9 1.26%, C10 1.70%, C11 2.15%, C12 2.66%, C13 3.56%, C14 4.69%, C15 6.89%, C16 10.53%, C17 62.90 %, C18 2.24%.

Embodiment 2

[0049] Add 10g linoleic acid, 0.5g urea, 1g 5wt%Ru / ZrO 2 Catalyst, 100g H 2 O, and sealed, filled with N into the reactor 2 , keep the initial pressure at 2MPa, and the stirring rate at 500rpm. Heat up to 330°C for 4 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 is analyzed by GC / FID after dichloromethane constant volume, and the conversion rate of oleic acid is 96.9%, and the yield of long-chain alkane is calculated (the ratio of the amount of long-chain alkane substance and the amount of reactant substance) 84.7%, including C7 0.31%, C80.56%, C9 0.78%, C10 0.88%, C11 1.84%, C12 1.73%, C13 2.46%, C14 3.62%, C156.07%, C16 10.13%, C17 71.00 %, C18 0.62%.

Embodiment 3

[0051] Add 10g of linolenic acid, 20g of methanol, 0.5g of 5wt%Ru / Al in a 250mL batch type high temperature and high pressure reactor 2 o 3 Catalyst, 80g H 2 O, and seal it, fill Ne into the reactor, keep the initial pressure as 1MPa, and the stirring rate as 500rpm. Heat up to 300°C for 9 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 is analyzed by GC / FID after dichloromethane constant volume, and the conversion rate of oleic acid is 100%, and the yield of long-chain alkane is calculated (the ratio of the amount of long-chain alkane substance and the amount of reactant substance) 91.1%, including C7 3.41%, C8 4.54%, C9 6.05%, C10 8.07%, C11 10.76%, C12 10.82%, C13 10.13%, C14...

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Abstract

The invention relates to the field of renewable energy, in particular to a method for decarboxylation of unsaturated fatty acids. It uses a relatively economical Ru-supported catalyst, under non-hydrogen-facing conditions, uses hydrogen-donating agent aqueous phase reforming to produce hydrogen in situ, and uses a hydrothermal process to achieve decarboxylation of unsaturated fatty acids. After the reaction, the solid-liquid two-phase Separation can be achieved after filtration, and the mixed alkanes in the organic phase are also easily separated from the water phase. Among them, after the Ru-loaded catalyst is used, it can be reused after regeneration. The mixed alkanes obtained can be used as lubricating oil base oil, diesel fuel, Jet fuel or gasoline is of great significance to the development and utilization of renewable resources.

Description

technical field [0001] The invention relates to the field of renewable energy, in particular to a method for decarboxylation of unsaturated fatty acids. Background technique [0002] Fatty acid decarboxylation is of great significance in the field of renewable energy and is an important step in the preparation of mixed alkanes to replace fossil fuels. [0003] At present, there are two main processes for the decarboxylation of fatty acids under hydrothermal conditions: hydrothermal catalytic process with hydrogen and non-hydrothermal catalytic process with hydrogen. The hydrothermal catalytic process requires a large amount of hydrogen. The high-purity hydrogen in the reactor can greatly increase the decarboxylation rate of fatty acids. However, at present, industrial hydrogen is mainly produced through coal chemical industry, and the consumption of hydrogen indirectly leads to the consumption of fossil fuels. Therefore, the process of decarboxylation of fatty acids to prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00C10M105/04C11C3/12
CPCY02P30/20
Inventor 张静姚潇毅赵志伟曾宪鹏崔福义
Owner CHONGQING UNIV
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