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Method for improving 60 DEG C dynamic viscosity of pavement petroleum asphalt

A technology of road asphalt and dynamic viscosity, which is applied in the petroleum industry and hydrocarbon oil treatment, and can solve the problems of high production cost and complicated processing technology

Active Publication Date: 2015-05-13
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing methods for increasing the dynamic viscosity of petroleum road asphalt at 60°C mainly have problems such as the limitation of raw material oil, complicated processing technology and high production costs, and it is urgent to develop a low-cost method for improving the dynamic viscosity of petroleum road asphalt at 60°C. method

Method used

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  • Method for improving 60 DEG C dynamic viscosity of pavement petroleum asphalt
  • Method for improving 60 DEG C dynamic viscosity of pavement petroleum asphalt
  • Method for improving 60 DEG C dynamic viscosity of pavement petroleum asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A low-condensation naphthenic crude oil and a heavy oil (mass mixing ratio 3:1) obtained by vacuum distillation of 90% # 、70 # The dynamic viscosities of asphalt at 60°C are 127 and 166pa.s respectively, and the vacuum residue of the mixed crude oil is used as raw material, and the reaction is carried out under the conditions of 365°C / residence time of 180 minutes and 395°C / residence time of 60 minutes. The product obtained after flash distillation and vacuum fractionation 90 # 、70 # The dynamic viscosities of asphalt at 60°C increased to 163 and 188 pa.s respectively.

Embodiment 2

[0020] A kind of naphthene-intermediate base crude oil obtains through vacuum distillation 90 # The dynamic viscosity of asphalt at 60°C is 97pa.s. Using the atmospheric residue of the crude oil as raw material, the temperature of 370°C / residence time is 160 minutes, 400°C / residence time is 100 minutes, and 410°C / residence time is 60 minutes The reaction product under the conditions obtained after normal pressure fractionation and vacuum fractionation 90 # The dynamic viscosities of asphalt at 60°C increased to 155, 166, and 161pa.s, respectively.

Embodiment 3

[0022] Another naphthene-intermediate base crude oil obtained by vacuum distillation # The dynamic viscosity of asphalt at 60°C is 130pa.s. Using the atmospheric residue of the crude oil as raw material, the temperature is 360°C / residence time of 200 minutes, 385°C / residence time of 70 minutes, and 410°C / residence time of 40 minutes. The reaction product under the condition of the 90 # The dynamic viscosities of asphalt at 60°C increased to 161, 159, and 168 pa.s, respectively.

[0023] Example 1

[0024]

[0025]

[0026] Example 2

[0027]

[0028] Example 3

[0029]

[0030]

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Abstract

The invention relates to method for improving 60 DEG C dynamic viscosity of pavement petroleum asphalt, which comprises the steps that atmospheric or vacuum residual oil serves as a raw material, is heated by a heating furnace, enters an asphalt tackifying reactor to be subjected to tackifying reaction, and then enters an atmospheric flash tower for separating out light gas oil; and oil at the bottom of the tower enters a vacuum heating furnace for heating, then enters a vacuum tower to be decompressed and fractionated. The vacuum residual oil at the bottom of the tower is the pavement petroleum asphalt product of which the viscosity is improved. Compared with the asphalt prepared by the same raw material and with a distillation method, the 60 DEG C dynamic viscosity of the pavement petroleum asphalt product prepared by the method with the same mark (the same needle penetration) is improved, so that the high-temperature property of the asphalt is improved.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry and relates to a method for increasing the dynamic viscosity of petroleum road asphalt at 60°C. Background technique [0002] With the development of the economy, there are more and more large and heavy-duty vehicles. The poor high-temperature stability of petroleum asphalt pavement is an important factor for the damage of highway pavement. This phenomenon is more serious in high-temperature areas. The dynamic viscosity of petroleum asphalt at 60°C has a good correlation with the strength, anti-push and anti-rutting capabilities of the asphalt mixture at the highest temperature of the road surface in summer, reflecting the requirements of asphalt performance, so road petroleum in many countries and regions Asphalt has an index requirement for the viscosity at 60°C. For example, in the JTG F40-2004 Road Petroleum Asphalt Technical Requirements of the Ministry of Communications of my c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G57/00
Inventor 刘海澄相养冬于洋孙丽王宏德张戬庞娱吴冰李媛媛吴晶
Owner PETROCHINA CO LTD
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