Preparation method of high softening point asphalt

A technology for high softening point bitumen and bitumen raw materials, which is applied in the chemical processing of tar pitch/petroleum pitch/natural pitch, etc., can solve the problems of low reaction efficiency, long reaction time and high temperature sensitivity of products

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems of long reaction time, low reaction efficiency and high temperature sensitivity of the product in the process of producing high softening point asphalt in the prior art, the present invention provides a method for producing high softening point asphalt by using a premixed catalytic oxidation method

Method used

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  • Preparation method of high softening point asphalt

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Experimental program
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Effect test

Embodiment 1

[0019] Heat the vacuum residue with a penetration of 121 1 / 10mm at 25°C and a softening point of 41.8°C, accounting for 96.4% (m) of the total amount, to a molten state of 140°C, and add 1.0% (m) of ferric chloride And 2.6% (m) of polyphosphoric acid and pass into the air, the air flow is 0.1m 3 kg -1 h -1 , cut for 30 minutes with a high-shear mixing emulsifier, and then enter the oxidation tower for blowing oxidation. The oxidation conditions and product properties are shown in Table 1.

Embodiment 2

[0023] Heat the vacuum residue with a penetration of 1651 / 10mm at 25°C and a softening point of 37.3°C, accounting for 96.5% (m) of the total amount, to a molten state at 120°C, and add 1.0% (m) of zinc oxide, 0.5 % (m) of copper sulfide and 2.0% (m) of polyphosphoric acid and pass into the air, the flow rate is 0.12m 3 kg -1 h -1 , sheared with a high-shear mixing emulsifier for 35 minutes, and then entered the oxidation tower for blowing oxidation. The oxidation conditions and product properties are shown in Table 1.

Embodiment 3

[0027] Heat the dissolved asphalt with a penetration of 411 / 10mm at 25°C and a softening point of 54.6°C, accounting for 95.5% (m) of the total amount, to a molten state at 150°C, and add 1.2% (m) of ferric chloride and 3.3% (m) of polyphosphoric acid and into the air, the flow rate is 0.1m 3 kg -1 h -1 , cut for 25 minutes with a high-shear mixing emulsifier, and then enter the oxidation tower for blowing oxidation. The oxidation conditions and product properties are shown in Table 1.

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Abstract

The invention provides a preparation method of high softening point asphalt, and the method comprises: heating an asphalt raw material to a molten state, subjecting the asphalt raw material, reaction additives accounting for 0.01%-5% of the total mass of the asphalt raw material, as well as air to full premixing reaction, with the mixing temperature controlled at 80-180DEG C and the mixing time controlled at 1min-40min; then introducing the mixture to an oxidation reactor for air blowing oxidation at a temperature of 200-340DEG C for 3-10h, with the air blowing rate of an oxidation tower maintained at 0.05-0.5m<3>.kg<-1>.h<-1>, thus obtaining a high softening point asphalt product with excellent high temperature performance and temperature susceptibility resistance. The method of the invention solves the problems of overlong reaction time, nonuniform air distribution, easy coking, short oxidation tower operation cycle, and poor product performance, etc. existing in current high softening point asphalt production processes by oxidation method.

Description

technical field [0001] The invention relates to a preparation method of high softening point asphalt, in particular to a preparation method of asphalt which improves the high-temperature stability of asphalt and resists temperature sensitivity by a premixed catalytic oxidation method. 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 rate loss under high temperature conditions. In addition, it can also be used as a modification additive for polymer materials, etc. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/04
Inventor 傅丽郭皎河姚汉荣张建锋李明林
Owner CHINA PETROLEUM & CHEM CORP
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