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Preparation method for high-softening point asphalt

A technology of high softening point asphalt and asphalt, which is applied in the direction of chemical processing of tar pitch/petroleum pitch/natural asphalt, etc. It can solve the problems of complex preparation process, high reaction temperature, and no description of the softening point range of high softening point asphalt. , achieve high reaction efficiency, uniform oxidation reaction, improve quality and oxidation efficiency

Active Publication Date: 2014-05-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of this method is complex, the reaction temperature is high, and the softening point range of high softening point asphalt is not specified.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The asphalt with a penetration of 41 1 / 10mm at 25°C and a softening point of 54.6°C and potassium permanganate with a particle size of 50nm are sprayed into the oxidation reactor at the same time in a mist state using a high-pressure pump and compressed air respectively to make it fully Mix evenly for oxidation reaction to obtain oxidized asphalt. The operating pressure of the high-pressure pump is 0.8MPa, and the operating pressure of the compressed air is 0.5MPa. The oxidation reaction is carried out under the condition of shearing, and the rotational speed of the shearing machine is 4000 rpm. The oxidation reaction conditions and product properties are shown in Table 1.

Embodiment 2

[0028] The asphalt with a penetration of 41 1 / 10mm at 25°C and a softening point of 54.6°C and potassium permanganate with a particle size of 50nm are sprayed into the oxidation reactor at the same time in a mist state using a high-pressure pump and compressed air respectively to make it fully Mix evenly for oxidation reaction to obtain oxidized asphalt. The operating pressure of the high-pressure pump is 1.5MPa, and the operating pressure of the compressed air is 0.8MPa. The oxidation reaction is carried out under the condition of shearing, and the rotational speed of the shearing machine is 3000 rpm. The oxidation reaction conditions and product properties are shown in Table 1.

Embodiment 3

[0030] Spray asphalt with a penetration of 121 1 / 10mm at 25°C and a softening point of 41.8°C and potassium dichromate with a particle size of 75nm into the oxidation reactor at the same time in a mist state using a high-pressure pump and compressed air respectively to make it fully Mix evenly for oxidation reaction to obtain oxidized asphalt. The operating pressure of the high-pressure pump is 2MPa, and the operating pressure of the compressed air is 1MPa. The oxidation reaction is carried out under the condition of shearing, and the rotational speed of the shearing machine is 6000 rpm. The oxidation reaction conditions and product properties are shown in Table 1.

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Abstract

The invention discloses a preparation method for high-softening point asphalt. The method includes: respectively spraying molten state asphalt and an oxidant into an oxidation reactor at the same time to undergo oxidation reaction, thus obtaining the high-softening point asphalt. Specifically, the oxidant is nanoscale potassium permanganate and / or nanoscale potassium dichromate. The asphalt and the oxidant are respectively sprayed into the oxidation reactor in the fog state at the same time by a high pressure pump and compressed air to undergo mixing. The method provided by the invention has the advantages of less oxidant consumption, low oxidation temperature, high reaction efficiency, convenient operation, environment-friendly reaction process, and low energy consumption.

Description

technical field [0001] The invention relates to a preparation method of high softening point asphalt, in particular to a high-efficiency oxidation method for preparing high softening point asphalt by using an oxidant. Background technique [0002] High softening point asphalt refers to asphalt with a softening point above 100°C, especially above 120°C. High softening point asphalt is widely used because of its excellent high temperature resistance. If it is used as a roof covering for building a house, it will not become very soft or even runny even in the hot summer. It can also be used in drilling operations in deep oil and gas fields. As an important part of drilling fluid, it can play a role in plugging, preventing collapse, stabilizing the well wall and reducing fluid loss under high temperature conditions. In addition, it can also be used as a modification additive for polymer materials, etc. [0003] The production process of high softening point asphalt mainly ado...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/04
Inventor 姚汉荣傅丽郭皎河张建峰刘树华
Owner CHINA PETROLEUM & CHEM CORP
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