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Modified biological asphalt and preparation method thereof

A bio-asphalt and modification technology, which is applied in the direction of chemical processing of tar asphalt/petroleum asphalt/natural asphalt, etc., can solve the unfavorable large-scale use of bio-asphalt, poor high-temperature stability and road performance, and increase the production of bio-asphalt Cost and other issues, to achieve sustainable development, improve high temperature stability and low temperature crack resistance, improve high temperature stability and road performance

Active Publication Date: 2020-12-15
BEIJING SANJU GREEN ENERGY TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, bio-oil is generally obtained by rapid pyrolysis of biomass raw materials, and the pyrolysis process has not reached thermodynamic equilibrium, so the physical and chemical properties of bio-oil and its separated components are usually unstable, mainly manifested as changes in storage time and temperature. The bio-oil will undergo physical and chemical changes, and the viscosity will increase. The bio-asphalt prepared from the bio-oil also has problems such as high temperature stability and poor road performance, which greatly hinders the use of bio-asphalt.
For this reason, the prior art discloses a method for preparing bio-asphalt by catalytic hydrogenation of biomass pyrolysis oil. The performance of bio-asphalt obtained by this modification method is more stable, but this method requires a platinum-based catalyst and a temperature of 200 ° C. Under high temperature conditions, the production cost of bio-asphalt is increased, and it is also not conducive to the wide-scale use of bio-asphalt

Method used

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  • Modified biological asphalt and preparation method thereof
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Examples

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Effect test

Embodiment 1

[0025] This embodiment provides a modified bio-asphalt, its raw material is composed of: 100g of bio-asphalt, 5g of bio-char, 2g of rubber powder; 3g of a mixture of 25wt% hydrogen peroxide and propanol, wherein: bio-char is corn stalk charcoal, The rubber powder is waste tire powder with a particle size of 100 mesh, and the volume ratio of hydrogen peroxide and propanol is 1:7.

[0026] The method for preparing the modified bio-asphalt by using the above-mentioned raw materials comprises the following steps:

[0027] (1) The corn stalks were subjected to thermal cracking reaction at 450° C. under oxygen-limited conditions for 2 h, separated to obtain biochar and gas fraction, and the gas was cooled to obtain bio-oil. Distill the bio-oil under reduced pressure, collect heavy oil with a boiling point greater than 100°C, mix the heavy oil with water, stir in a circulating water bath at 5°C for 30 minutes, then place the mixed solution at room temperature for 1 hour, Filtration,...

Embodiment 2

[0031] This embodiment provides a modified bio-asphalt, the raw material composition of which is: 100g of bio-asphalt, 10g of bio-char, 5g of rubber powder; 7g of a mixture of 25wt% hydrogen peroxide and butanol, wherein: bio-char is corn stalk charcoal, The rubber powder is waste tire powder with a particle size of 50 mesh, and the volume ratio of hydrogen peroxide and butanol is 1:10.

[0032] The method for preparing the modified bio-asphalt by using the above-mentioned raw materials comprises the following steps:

[0033] (1) The oak was pyrolyzed for 2 hours under oxygen-limited conditions at 450°C, separated to obtain biochar and gas, and the gas was cooled to obtain bio-oil. Distill the bio-oil under reduced pressure, collect heavy oil with a boiling point greater than 100°C, mix the heavy oil with water, stir in a circulating water bath at 5°C for 30 minutes, then place the mixed solution at room temperature for 1 hour, Filtration, separation to obtain insoluble compo...

Embodiment 3

[0037] This embodiment provides a modified bio-asphalt, its raw material composition is: 100g of bio-asphalt, 8g of bio-char, 3.5g of rubber powder; 5g of a mixture of 25wt% hydrogen peroxide and ethanol, wherein: bio-char is corn stalk charcoal, The rubber powder is waste tire powder with a particle size of 80 mesh, and the volume ratio of hydrogen peroxide and ethanol is 1:8.

[0038] The method for preparing the modified bio-asphalt by using the above-mentioned raw materials comprises the following steps:

[0039] (1) The rice husk was pyrolyzed for 2 hours under oxygen-limited conditions at 450° C., separated to obtain biochar and gas, and the gas was cooled to obtain bio-oil. Distill the bio-oil under reduced pressure, collect heavy oil with a boiling point greater than 100°C, mix the heavy oil with water, stir in a circulating water bath at 5°C for 30 minutes, then place the mixed solution at room temperature for 1 hour, Filtration, separation to obtain insoluble compon...

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Abstract

The invention relates to the technical field of preparation of road paving materials, and particularly discloses a modified biological asphalt and a preparation method thereof. The modified biologicalasphalt is prepared from biological asphalt, biochar, rubber powder and a mixed solution of hydrogen peroxide and alcohol, the viscosity of the biological asphalt is reduced through synergistic cooperation of the raw materials in a specific proportion; the high-temperature stability and pavement performance of the biological asphalt are improved, the comprehensive quality of the biological asphalt is improved, the biological asphalt can partially or completely replace pavement petroleum asphalt, the dependence on petroleum resources is reduced, the pressure caused by shortage of petroleum resources is relieved, meanwhile, the biological asphalt belongs to renewable resources, and sustainable development of highway traffic infrastructure construction can be realized.

Description

technical field [0001] The invention relates to the technical field of preparation of road paving materials, in particular to a modified bio-asphalt and a preparation method thereof. Background technique [0002] With the rapid development of my country's national economy, the role of road transportation as infrastructure is becoming more and more obvious, which also enables the construction of expressways in our country to maintain a relatively large scale for a long period of time, and about More than 90% of them are asphalt pavements, and at the same time, post-work such as road maintenance also consumes a large amount of asphalt. Traditional petroleum asphalt is mostly refined from imported crude oil, and crude oil is a non-renewable resource. With the severe exploitation of crude oil, crude oil reserves are rapidly decreasing, and the price of petroleum asphalt is rising, which seriously affects and hinders the construction and maintenance of asphalt pavement in our coun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/02
CPCC10C3/02
Inventor 潘东姜芳
Owner BEIJING SANJU GREEN ENERGY TECH CO LTD
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