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Method for preparing long-chain alkane from gutter oil through hydrolysis and in-situ hydrogenation and decarboxylation

An in-situ hydrogenation and long-chain alkane technology, which is applied in the preparation of liquid hydrocarbon mixtures, petroleum industry, biological raw materials, etc., can solve the problems that need to be further improved, the total mass yield of the three-step reaction is low, etc., and the product separation is convenient. , easy separation, zero hydrogen consumption effect

Active Publication Date: 2016-05-25
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

and C 8 ~C 18 Decarboxylation of saturated fatty acids yields C 7 ~C 17 For long-chain alkanes, the mass yield of only the third-step decarboxylation reaction is up to 70%, and the total mass yield of the three-step reaction is lower. Therefore, the process of the preparation method needs to be further simplified, and the total mass yield of long-chain alkanes needs to be further improved. improve

Method used

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  • Method for preparing long-chain alkane from gutter oil through hydrolysis and in-situ hydrogenation and decarboxylation
  • Method for preparing long-chain alkane from gutter oil through hydrolysis and in-situ hydrogenation and decarboxylation
  • Method for preparing long-chain alkane from gutter oil through hydrolysis and in-situ hydrogenation and decarboxylation

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Add 50g waste oil and 50g deionized water into a 500mL intermittent high-temperature and high-pressure reactor, start stirring, heat up to 230 ° C for 10 hours of hydrolysis reaction, after the hydrolysis reaction is completed, cool to room temperature, and obtain the upper hydrolyzate (C 8 ~C 18 fatty acid) 47.2g; 47.2g hydrolyzate and 3.8g10%Cu-30%Ni / MgO catalyst, 11.2g glycerol, 210mL deionized water were added to a 500mL intermittent high-temperature and high-pressure reactor, heated to 330°C for 4 hours , after the reaction was completed, the reaction product was cooled and filtered; the liquid phase product was allowed to stand for stratification, and the organic phase was separated and analyzed with GC-FID after constant volume with acetone, and the calculated quality of the long-chain alkane was 27.7g. The total mass yield is 55.4% of the mass of long-chain alkanes divided by the mass of waste oil.

Embodiment 2

[0042] Add 50g waste oil and 50g deionized water into a 500mL intermittent high-temperature and high-pressure reactor, start stirring, heat up to 210°C for hydrolysis reaction for 6h, after the hydrolysis reaction is completed, cool to room temperature, and obtain the upper hydrolyzate (C 8 ~C 18 fatty acid) 37.8g; 37.8g hydrolyzate and 9.5g30%Cu-30%Ni / Al 2 o 3 Catalyst, 13.5g methanol, 250mL deionized water were added to a 500mL intermittent high-temperature and high-pressure reactor, heated to 330°C for 3 hours, and after the reaction was completed, the reaction product was cooled and filtered; the liquid phase product was separated and separated to obtain After the organic phase was fixed to volume with acetone, it was analyzed by GC-FID. The calculated mass of long-chain alkanes was 28.4 g, and the total mass yield of long-chain alkanes was 56.9%.

Embodiment 3

[0044] Add 50 g of waste oil and 100 g of deionized water into a 500 mL intermittent high-temperature and high-pressure reactor, start stirring, heat up to 190 ° C for 7 hours of hydrolysis reaction, after the hydrolysis reaction is completed, cool to room temperature, and obtain the upper hydrolyzate (C 8 ~C 18 fatty acid) 33.4g; 33.4g hydrolyzate and 6.7g20%Cu-40%Ni / MWCNTs catalyst, 15.6g methanol, 210mL deionized water were added to a 500mL intermittent high-temperature and high-pressure reactor, heated to 330°C for 1 hour , after the reaction was completed, the reaction product was cooled and filtered; the liquid phase product was allowed to stand for stratification, and the organic phase was separated and analyzed with GC-FID after constant volume with acetone, and the calculated quality of the long-chain alkane was 25.6g, and the mass of the long-chain alkane The total mass yield is 51.1%.

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Abstract

The invention relates to a method for preparing long-chain alkane from gutter oil through hydrolysis and in-situ hydrogenation and decarboxylation. The method comprises the following steps that 1, the gutter oil is mixed with water, the mixture is heated for a hydrolysis reaction, and C8-C18 fatty acid is obtained after reaction products are treated; 2, the C8-C18 fatty acid, a non-noble metal catalyst, a hydrogen-donating agent and water are together added into a high-temperature and high-pressure reaction kettle and heated to 310-410 DEG C, and a decarboxylic reaction is conducted for 0.5-7 h, wherein the active component of the non-noble metal catalyst is Cu-Ni, and a catalyst carrier is one of SiO2, ZrO2, Al2O3, MgO and MWCNTs; 3, a reaction product is cooled and dissolved with organic solvent, and a liquid product and a solid catalyst are obtained after filtration is conducted. According to the method for preparing the long-chain alkane from the gutter oil through hydrolysis and in-situ hydrogenation and decarboxylation, the gutter oil is catalyzed by the non-noble metal catalyst in high-temperature water, in-situ hydrogenation and decarboxylation are conducted on a hydrolysis product to prepare the long-chain alkane, and compared with an existing technology, the method has the advantages of being simple in process, free of hydrogen consumption and low in catalyst cost; in addition, the total mass yield of the long-chain alkane in the method can reach 75.4% or above.

Description

technical field [0001] The invention relates to the field of oil degradation, in particular to a method for preparing long-chain alkanes from waste oil through hydrolysis and in-situ hydrogenation decarboxylation. Background technique [0002] With the continuous consumption of global fossil fuels and the gradual increase of China's dependence on foreign crude oil, China's dependence on foreign oil exceeded 55% in 2011, and it is expected that by 2020, China's dependence on foreign oil will reach 62%. Large-scale oil imports will increase China's dependence on foreign resources. Therefore, the development of bio-aviation kerosene can not only promote the rapid development of the aviation industry, but also affect the country's national energy security. According to statistics, the global aviation transportation industry consumes 1.5 to 1.7 billion barrels of aviation kerosene every year. With the increasing shortage of oil resources, the increase in fuel costs has become the...

Claims

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Application Information

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IPC IPC(8): C10G3/00
CPCY02P30/20C10G3/42C10G3/50C10G2300/1007
Inventor 傅杰张子豪吴江华吕秀阳欧阳平凯
Owner ZHEJIANG UNIV
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