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Paraffin preprocessing method
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A pretreatment, paraffin technology, applied in the petroleum industry, petrochemical modification, liquid carbon-containing fuels, etc., can solve problems such as unsolved paraffin processing technology
Inactive Publication Date: 2014-02-05
NORTHWESTERN POLYTECHNICAL UNIV
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Summary
Abstract
Description
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Problems solved by technology
The domestic paraffin wax pretreatment process mainly focuses on improving the ductility, flexibility and emulsification performance of paraffin wax, and there is no treatment technology to solve the compatibility of paraffin wax and HTPB
Method used
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Examples
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Effect test
example 1
[0020] Example 1, including the following steps:
[0021] (1) Weigh 100g of paraffin, 50g of HTPB, 1.5g of BPO, and 7.5g of acetone.
[0022] (2) After mixing paraffin and HTPB, start to heat up at a rate of 5°C / min;
[0023] (3) When the temperature reaches 60°C, start stirring the paraffin and HTPB, and continue to heat up at a rate of 5°C / min;
[0024] (4) When the temperature reaches 90°C, add benzoyl peroxide (BPO) dissolved in acetone, and continue to heat up at a rate of 5°C / min;
[0025] (5) After raising the temperature to 140°C, the reaction time was maintained for 5 hours, and the reaction was stopped to obtain the product.
[0026] The prepared modified paraffin is a light yellow solid with slightly hard texture and relatively high viscosity, without delamination. With this modified paraffin in the ratio of HTPB: paraffin: MA alloy: AP: C powder: other = 8: 60: 10: 8: 10: 4 prepared paraffin-containing fuel, the retreat rate measured in the atmosphere is 2.14 m...
example 2
[0027] Example 2, including the following steps:
[0028] (1) Weigh 100g of paraffin, 100g of HTPB, 2.0g of BPO, and 10.0g of acetone.
[0029] Experimental steps (2)-(5) are the same as Example 1.
[0030] The prepared modified paraffin wax is dark yellow colloid, very soft in texture, high in viscosity, soft as a whole, and no delamination phenomenon occurs. With this modified paraffin in the ratio of HTPB: paraffin: MA alloy: AP: C powder: other = 8: 60: 10: 8: 10: 4 prepared paraffin-containing fuel, the retreat rate measured in the atmosphere is 1.83 mm / s
example 3
[0031] Example 3, including the following steps:
[0032] (1) Weigh 150g of paraffin, 50g of HTPB, 2.0 of BPO, and 10.0g of acetone.
[0033] Experimental steps (2)-(5) are the same as Example 1.
[0034] The prepared modified paraffin is a white solid with hard texture, low viscosity and slight layering phenomenon. With this modified paraffin in the ratio of HTPB: paraffin: MA alloy: AP: C powder: other = 8: 60: 10: 8: 10: 4 prepared paraffin-containing fuel, the retreat rate measured in the atmosphere is 1.90 mm / s
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PUM
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Abstract
The invention discloses a paraffin preprocessing method which comprises the following steps: weighing paraffin and HTPB (hydroxyl-terminated polybutadiene) at a mass ratio of 1:1, 1.5:1, 2:1, 2.5:1 or 3:1; weighing initiator benzoyl peroxide (BPO) the mass of which is 1% of the total mass of the paffin and HTPB; weighing acetone based on that condition that the mass ratio of the acetone to the BPO is 5:1; mixing the paraffin with the HTPB, and then heating at a rate of 5 DEG C / min; when the temperature is 60 DEG C, starting to stir the paraffin and the HTPB, and continuously heating at the rate of 5 DEG C / min; when the temperature is 90 DEG C, adding the BPO dissolved by the acetone, and continuously heating at the rate of 5 DEG C / min; and reacting for 5-7 hours after the temperature is 140 DEG C, stopping reaction, thus obtaining a product. According to the invention, the modified paraffin with uniform quality is obtained, thereby providing a basis for preparing a paraffin-containing fuel.
Description
technical field [0001] The invention relates to a pretreatment method of paraffin. Background technique [0002] The solid-liquid hybrid engine has the advantages of being adjustable, safe, cheap, and having both the high thrust-to-weight ratio of solid rockets and the high specific impulse of liquid rockets. At present, there are two main difficulties in the development of solid-liquid hybrid engines: one is that the combustion efficiency is not high; the other is that the fuel retreat rate is low. Combustion efficiency can be improved to an acceptable level by measures such as adding an afterburner. The low retreat velocity of traditional solid fuels has always been a difficult problem for the engineering community. Therefore, increasing the burning rate becomes the key to the development of hybrid engines. [0003] In recent years, paraffin-containing fuels that partially replace HTPB with paraffin have emerged abroad. Its density is equivalent to that of HTPB fuel, an...
Claims
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Application Information
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