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A kind of preparation method of aviation kerosene or diesel oil

A technology of aviation kerosene and diesel oil, which is applied in the field of preparation of aviation kerosene or diesel oil, and can solve problems such as complex process, limited raw materials, and inability to be directly used as engine fuel

Active Publication Date: 2021-04-27
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it uses edible oil and grain as raw materials. The raw materials are limited, the cost is high, and people compete for land and grain. It is not suitable for the national conditions of our country with a large population and little land, nor is it suitable for the sustainable development of human society.
The third stage of biomass liquid fuel is to use non-edible lignocellulose as raw material. At present, there are three main ways to prepare fuel: 1) Thermochemical gasification of biomass to synthesis gas, and then production of alkanes by Fischer-Tropsch synthesis. The process is relatively mature, but it requires high temperature and high pressure conditions, and has high requirements for production equipment; 2) High temperature pyrolysis of biomass to produce biomass oil is a complicated process, and the quality of the obtained biomass oil is poor, so it cannot be used directly As engine fuel, further refining is required; 3) Biomass platform compound molecules obtained from lignocellulose are subjected to carbon-carbon coupling reactions such as aldol condensation and alkylation, and then hydrodeoxygenated to produce liquid alkanes , the process conditions are relatively mild, and the synthetic route is flexible
However, the raw materials they use only come from the lignin part of the biomass resources, which accounts for a relatively low proportion of less than 30% in the entire biomass resources, and the solid catalyst used in the alkylation process is not effective. Not good, the relative temperature is also high, and only when the ratio of the amount of wuzhide of benzyl ether and anisole is small can obtain better yield and selectivity, but recovering a large amount of anisole from the system will consume considerable Much energy is not conducive to its large-scale industrial production

Method used

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  • A kind of preparation method of aviation kerosene or diesel oil
  • A kind of preparation method of aviation kerosene or diesel oil
  • A kind of preparation method of aviation kerosene or diesel oil

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preparation example Construction

[0033] Preparation of protonated ionic liquid: Taking the synthesis of ethanolamine acetate as an example, add 6.1g of ethanolamine into two-necked flasks, one of which is inserted into a thermometer to control the temperature of the system, and the other is equipped with a constant-pressure dropping funnel filled with 6.0g of acetic acid , put the above device into an ice-water bath, add acetic acid dropwise to ethanolamine under stirring, and maintain the temperature of the system between 0-10°C with an ice-water bath. After the dropwise addition, the mixture was stirred at room temperature for 24 hours, dried in vacuum at 60°C, sealed and stored for future use, labeled as ethanolamine acetate. The synthesis process and naming method of other protonated ionic liquids are consistent with the above process. When the acid used is hydrochloric acid and / or nitric acid, it is necessary to perform rotary evaporation to remove water after stirring, and then perform vacuum drying at 6...

Embodiment

[0044] 1 Preparation of aviation kerosene precursor

[0045] The preparation method of the aviation kerosene precursor is consistent with the aldol condensation reaction process of 2-methylbenzaldehyde and cyclohexanone described above, and the details of the differences are shown in Table 1.

[0046] Table 1. Aldol condensation reactions and their results

[0047]

[0048]

[0049]

[0050] From the gas chromatographic yield of the target product given by Examples 1-57 in Table 1, it can be seen that there is a certain yield of product under the action of different protonated ionic liquids; wherein ethanolamine acetate The effect is the best; when ethanolamine acetate is used as the catalyst, the substrate can be extended to other lignocellulosic aldehydes and cellulose ketones, and the catalytic effect is still good; it shows that the system has certain universality ;

[0051] Analysis can be obtained for the reaction system of Example 11 figure 1 Shown gas chromat...

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Abstract

The invention relates to a new route for synthesizing polycycloalkanes in the range of liquid high-density aviation kerosene or diesel oil based on biomass-based platform compounds as raw materials; the method of the invention is divided into two parts: 1) using protonated ionic liquids as catalysts to catalyze wood The aldol condensation reaction of cellulose-based aldehydes and cellulose-based ketones to prepare aviation kerosene or diesel precursors; 2) by using metal hydrogenation catalysts to hydrodeoxygenate the precursors obtained by aldol condensation reactions to obtain Polycyclic alkanes in the liquid high-density aviation kerosene or diesel range.

Description

technical field [0001] The invention relates to a new route for synthesizing polycycloalkanes within the range of liquid high-density aviation kerosene or diesel oil based on biomass-based platform compounds as raw materials, specifically a method for preparing aviation kerosene or diesel oil; the method of the invention is divided into two parts : 1) Using protonated ionic liquids as catalysts to catalyze the aldol condensation reaction of lignocellulosic-based aldehydes and cellulose-based ketones to prepare aviation kerosene or diesel precursors; 2) Aldol condensation by using metal hydrogenation catalysts The precursor obtained by the reaction is subjected to hydrodeoxygenation to obtain polycyclic alkanes in the range of liquid high-density aviation kerosene or diesel oil. Background technique [0002] Aviation kerosene or diesel oil is a kind of fuel specially prepared for aircraft. In order to ensure the normal flight of aircraft at an altitude of 10,000 meters, very ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00
CPCC10G3/42C10G2300/1011Y02E50/10Y02T50/678Y02P30/20
Inventor 李宁徐吉磊张涛李广亿王爱琴王晓东丛昱
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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