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A kind of preparation method of paraffin-containing fuel

A technology of paraffin fuel and paraffin, which is applied in the field of solid-liquid hybrid engine propellant preparation, can solve the problems of low dropping point and poor mechanical properties of paraffin-containing fuels, and achieve the effects of improving mechanical properties, increasing dropping point, and ensuring uniformity

Inactive Publication Date: 2018-10-30
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] In order to avoid the deficiencies in the prior art and overcome the defects of low dropping point and poor mechanical properties of paraffin-containing fuels that use industrial paraffin as the main raw material, the present invention proposes a preparation method for paraffin-containing fuels; by modifying the paraffin wax, by Chain extension reaction of modified paraffin and curing reaction of binder to prepare new paraffin-containing fuel with higher dropping point and better mechanical properties

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  • A kind of preparation method of paraffin-containing fuel

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preparation example Construction

[0026] This embodiment is a method for preparing paraffin-containing fuel.

[0027] Refer to figure 1 , The preparation method of paraffin-containing fuel in this embodiment, the specific process is:

[0028] The first step. Modification of paraffin wax;

[0029] It is generally believed that the catalytic oxidation of paraffin wax follows the free radical chain theory, which can only be carried out under the action of a catalyst or initiator; once peroxide is formed, the chain reaction begins. The peroxide can further generate acid, ketone, and alcohol organic compounds in contact or non-contact. When boric acid is present in paraffin wax, boric acid not only catalyzes the decomposition of peroxide, but also makes it directionally decompose to produce alcohol, and it can also prevent the further oxidation of the produced alcohol; using boric acid as a catalyst, paraffin and air As the main raw material, it introduces hydroxyl groups into paraffin wax molecules through catalytic o...

example 1

[0044] Heat 250g of paraffin wax to 210°C, then pass in air with a flow rate of 3L / min, and slowly add 21g of boric acid while maintaining the temperature at 200°C. After adding boric acid for 1 hour, perform vacuum distillation at a temperature of 180°C and a pressure of 10 Pa. Pour the residue after vacuum distillation into hot water at a temperature of 80°C and a volume of 600 ml, and stir for 30 minutes. The upper material is vacuum dried to obtain modified paraffin wax.

[0045] Take 50% modified paraffin wax, 12% tris(2-methyl-1-aziridine) phosphine oxide, and 38% hydroxyl-terminated polybutadiene according to mass percentage to weigh each raw material. First put the modified paraffin wax in a mixing pot with a temperature of 60°C. After the modified paraffin wax is melted, add tris(2-methyl-1-aziridine) phosphine oxide and hydroxy-terminated polybutadiene in sequence according to the formula, and stir Mix for 45 minutes. The mixed liquid slurry is vacuum poured at a temp...

example 2

[0047] Heat 250g of paraffin wax to 210°C, then pass in air with a flow rate of 3L / min, and slowly add 21g of boric acid while maintaining the temperature at 200°C. After adding boric acid for 1 hour, perform vacuum distillation at a temperature of 180°C and a pressure of 10 Pa. Pour the residue after vacuum distillation into hot water at a temperature of 80°C and a volume of 600 ml, and stir for 30 minutes. The upper material is vacuum dried to obtain modified paraffin wax.

[0048] Weigh 35% of modified paraffin wax, 10% of tris(2-methyl-1-aziridine) phosphine oxide, 25% of hydroxyl-terminated polybutadiene, and 30% of elemental aluminum according to mass percentage. First put the modified paraffin wax in a mixing pot with a temperature of 60°C, after the modified paraffin is melted, add tris(2-methyl-1-aziridine) phosphine oxide, hydroxyl-terminated polybutadiene and elemental substances in sequence according to the formula Aluminum, stir and mix for 45 minutes. The mixed li...

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Abstract

The invention discloses a method for preparing fuel containing paraffin.The method is based on paraffin modification, catalytic oxidation is conducted on paraffin through chain extension reaction of modified paraffin and curing reaction of a binder, a hydroxyl functional group for chain extension is introduced to paraffin molecules, the molecular weight of paraffin is increased through chain extension reaction of a chain extender and the modified paraffin with the modified paraffin and the binder as main materials, and then the dropping point of the fuel containing paraffin is increased; during preparation of the fuel containing paraffin, the binder is added to the modified paraffin, and the mechanical performance of the fuel containing paraffin is improved through reaction of a curing agent and the binder; due to the fact that the modified paraffin and the binder are polar molecules, delamination does not occur easily during curing, and uniformity of components of the fuel can be guaranteed; the number of varieties of raw materials required for paraffin modification is small, the modification process is simple, the fuel containing paraffin with high dropping point, fuel regression rate and mechanical performance can be prepared at low cost, and the fuel is highly economical.

Description

Technical field [0001] The invention relates to a preparation technology of a solid-liquid mixed engine propellant, in particular to a preparation method of a paraffin-containing fuel. Background technique [0002] Rocket engines are power plants for spacecraft and missiles. With the development and progress of aerospace technology, high reliability, low cost, and environmental protection have become important directions for their future development. The solid-liquid hybrid engine uses solid fuel and liquid oxidant as propellants, and has the following advantages: 1) The oxidizer and fuel are stored separately, and the storage and operation safety of the engine are relatively high; 2) The oxidant of the propellant is mainly liquid oxygen and peroxide Hydrogen, the fuel is mainly hydroxy-terminated polybutadiene, paraffin, polyethylene and other hydrocarbon fuels. The gas is non-toxic and meets the requirements of environmental protection; 3) The thrust of the engine can be adjust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06D5/10C10G73/38
CPCC06D5/10C10G73/38
Inventor 刘林林胡松启刘元敏刘茜
Owner NORTHWESTERN POLYTECHNICAL UNIV
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