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A kind of modified petroleum asphalt with low carcinogenic polycyclic aromatic hydrocarbon content and its preparation method

A polycyclic aromatic hydrocarbon and petroleum asphalt technology, applied in building components, building insulation materials, buildings, etc., can solve problems such as a large number of solvents, production efficiency and environmental impact, and achieve the effect of reducing the content

Active Publication Date: 2017-03-29
QINGDAO LINK OIL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Invention patent 201410110361.1 discloses a method of modifying coal tar pitch to reduce the content of polycyclic aromatic hydrocarbons 3,4-benzopyrene, but this method requires the use of a large amount of solvents, which affects production efficiency and environmental protection

Method used

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  • A kind of modified petroleum asphalt with low carcinogenic polycyclic aromatic hydrocarbon content and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0014] Add 80 parts of petroleum asphalt with a softening point of 43°C to the reactor, stir and raise the temperature to 260°C, use an air compressor to blow air with a pressure of 0.2MPa and a flow rate of 2L / (Kg·min) into the reactor When the material reaches the softening point of 80-85°C, stop blowing air. When the temperature of the material is lowered to 165°C, add 2 parts of p-toluenesulfonic acid and 15 parts of terephthalenedimethanol, stir and react for 1.5 hours, and discharge the material. Each part of the material used is 1000g.

Embodiment 2

[0016] Add 85 parts of petroleum pitch with a softening point of 47°C to the reactor, stir and raise the temperature to 270°C, use an air compressor to blow air with a pressure of 0.3MPa and a flow rate of 3L / (Kg·min) into the reactor During the process, when the material reaches a softening temperature of 90-95°C, stop blowing air. The temperature of the material was lowered to 175° C., 3 parts of p-toluenesulfonic acid and 20 parts of paraformaldehyde were added, and the reaction was stirred for 2 hours. Each part of the material used was 1000 g.

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Abstract

The invention relates to a low-cancerigenic-polycyclic-aromatic-hydrocarbon-content modified petroleum asphalt which is prepared from the following components in parts by weight: 80-90 parts of petroleum asphalt, 1-4 parts of p-toluenesulfonic acid and 10-20 parts of modifier. After finishing the petroleum asphalt oxidization and cooling to proper temperature, the catalyst and modifier can be directly added to continuously complete the modification reaction, so the method is simple and efficient and can fully utilize the residual heat energy after oxidization; the polycyclic aromatic hydrocarbon content in the obtained product is obviously lowered, and other properties, such as softening point, can be controlled through oxidization time according to needs.

Description

technical field [0001] The invention relates to the technical field of asphalt materials, in particular to a modified petroleum asphalt with low content of carcinogenic polycyclic aromatic hydrocarbons and a preparation method thereof. Background technique [0002] Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a waterproof, moisture-proof and anti-corrosion organic gel material. Has a wide range of uses. However, asphalt contains carcinogenic polycyclic aromatic hydrocarbons, which seriously endanger people's health and limit the application of asphalt. Usually, asphalt is modified by air oxidation at a certain temperature, such as improving the hardness, softening point, and aging resistance of asphalt, and reducing the ductility and sensitivity of asphalt to temperature changes. Patent 01133367.7 discloses a method for oxidizing asphalt, which solves the problems of low air utiliz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K5/42C08K5/07C08K5/159
Inventor 傅秀成
Owner QINGDAO LINK OIL PROD
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