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A kind of preparation method of alkyl substituted tetrahydrodicyclopentadiene dimer and its application as jet fuel

A dicyclopentadiene dimer and alkyl technology, which is applied in the direction of liquid carbon-containing fuel, carbon-based compound preparation, hydroxyl compound preparation, etc., can solve the problems of freezing point pollution, limited source of raw materials, single product components, etc. Achieve the effect of slowing down the consumption of fossil fuels, reducing the cost of preparation, and the process consumes a lot of energy

Active Publication Date: 2021-10-29
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the shortcomings of the existing tetrahydroalkyl-substituted dicyclopentadiene dimer synthesis method, the product components are single, the source of raw materials is limited, the pollution is serious, and the freezing point, viscosity, and chemical heat sink need to be improved, and a method is provided. Preparation method of tetrahydroalkyl substituted dicyclopentadiene dimer and its use as jet fuel

Method used

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  • A kind of preparation method of alkyl substituted tetrahydrodicyclopentadiene dimer and its application as jet fuel
  • A kind of preparation method of alkyl substituted tetrahydrodicyclopentadiene dimer and its application as jet fuel
  • A kind of preparation method of alkyl substituted tetrahydrodicyclopentadiene dimer and its application as jet fuel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Add 3g of 2,5-hexanedione and 10mL of water into a 25mL three-necked flask. Under an inert atmosphere (nitrogen is selected), add 400mg of CaO after heating up to 150°C. After reacting for 14h, analyze the product by gas chromatography. The yield of methylcyclopentenone reaches 98%. Its GC-MS diagram is as follows figure 1 shown.

Embodiment 2-20

[0051] Same as Example 1, under a nitrogen atmosphere, use acid-base bifunctional catalysts magnesium aluminum hydrotalcite, magnesium zirconium hydrotalcite, calcium zirconium hydrotalcite (the ratio of the two cations of the hydrotalcite used is between 1 to 10); or an alkaline catalyst Magnesium oxide, calcium oxide, zirconium hydroxide, sodium hydroxide, potassium hydroxide, magnesium hydroxide; or acid catalyst phosphotungstic acid (HPW), HZSM-5, Hβ, HY, H 2 SO 4 , HCl, sulfonic acid resin (such as Amberlyst-15), fluorosulfonic acid tree (such as Nafion-212) (the SiO of the molecular sieve used 2 / Al 2 o 3 The ratio is in the range of 10 to 200) as a catalyst to catalyze the reaction of 2,5-chain diketones to prepare alkyl-substituted cyclopentenones. The results of reactant and its consumption, catalyst and its consumption, solvent type and its consumption, reactant conversion, reaction temperature, reaction time and alkyl substituted cyclopentenone yield are listed i...

Embodiment 21

[0056] 154mg of methylcyclopentenone, 3.2mL of methanol and 149mg of CeCl 3 .7H 2 O (co-catalyst) joins in the round bottom flask of 25mL, adds 31mg sodium borohydride at 0 ℃, after reaction 20min, the transformation rate of methylcyclopentenone 100%, methylcyclopentenol yield is higher than 98%. Its GC-MS diagram is as follows figure 2 shown.

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Abstract

The invention discloses a method for preparing a pendant tetrahydroalkyl-substituted dicyclopentadiene dimer, which comprises the following steps: (1) preparing an alkyl-substituted cyclopentenone or a mixture; (2) preparing an alkyl-substituted ring Pentenol or a mixture; (3) preparing an alkyl-substituted dicyclopentadiene dimer or a mixture; (4) preparing a hanging tetrahydroalkyl-substituted dicyclopentadiene dimer or a mixture thereof. The invention also discloses the use of the prepared pendant tetrahydroalkyl substituted dicyclopentadiene dimer or mixture as jet fuel. The pendant tetrahydroalkyl substituted dicyclopentadiene dimer or mixture prepared by the invention has improved heat sink value, lower freezing point and lower viscosity.

Description

technical field [0001] The invention belongs to the technical field of organic fuel application, and in particular relates to a preparation method of an alkyl-substituted tetrahydrodicyclopentadiene dimer and its use as a jet fuel. Background technique [0002] High-density hydrocarbon fuel is an important liquid propellant component and one of the key factors determining the flight performance of spacecraft. It can be a single-component hydrocarbon or a mixture of multi-component hydrocarbons, and is mainly used in turbojet, ramjet, rocket and combined power engines. The development of the aerospace industry requires the fuel to provide more propulsion kinetic energy with a certain volume of the fuel tank, and at the same time requires it to have better low-temperature fluidity. [0003] Tetrahydromethyldicyclopentadiene dimer (RJ-4 fuel, bridged tetrahydromethyldicyclopentadiene dimer) was first used in the U.S. Navy's "Tomahawk" cruise missile, with a high density (0.94 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C5/00C07C13/61C10L1/04
CPCC07C1/24C07C5/00C07C29/143C07C45/67C10L1/04C07C13/605C07C49/597C07C35/06C07C13/61
Inventor 聂根阔邹吉军潘伦张香文
Owner TIANJIN UNIV
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