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Esterified biological asphalt and preparation method thereof

A technology of bio-asphalt and esterification, which is applied in the direction of fatty acid esterification, chemical processing of tar pitch/petroleum pitch/natural pitch, and selective extraction of tar pitch/petroleum pitch/natural pitch, etc., which can solve the problem of bio-bitumen Aging, restrictions on the promotion and utilization of bio-asphalt, etc., to achieve the effect of small viscosity growth rate, good aging resistance, and accelerated reaction

Active Publication Date: 2015-03-04
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, because the biomass pyrolysis oil contains more active carboxylic acid groups, the bio-asphalt prepared from the biomass pyrolysis oil is easy to age. The extension gradually increases, which limits the promotion and utilization of bio-asphalt. Our research group has made various attempts to improve the anti-aging performance of bio-asphalt. For example, the bio-asphalt described in CN103 396818A is prepared by mixing bio-oil and solvent. , filter and centrifuge to obtain the insoluble components, mix the insoluble components with alcohol, and directly contact with air at 80-120°C and stir until the softening point is 40-80°C, but the 120°C Brookfield viscosity of the bio-asphalt obtained by this process The growth rate still reaches 0.07-1.5Pa·s / h

Method used

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  • Esterified biological asphalt and preparation method thereof
  • Esterified biological asphalt and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Example 1 A preparation method of esterified bio-asphalt

[0025] 1) Mix 600g of switchgrass bio-oil and 90g of 1,2-propanediol, add 3g of molecular sieve HZSM-5, and stir and react at 60°C for 2h;

[0026] 2) Use water to extract step 1) to separate the bio-oil after the catalyst, and after standing for 0.5h, filter and separate the insoluble matter;

[0027] 3) The insoluble matter was subjected to air oxidation treatment in an oven at 80°C to obtain bio-pitch 1.

Embodiment 2

[0028] Example 2 A preparation method of esterified bio-asphalt

[0029] 1) Mix 600g of corn stalk bio-oil and 180g of n-octanol, add 3g of 732-type cation exchange resin, and stir and react at 90°C for 0.5h;

[0030] 2) Use water to extract step 1) to separate the bio-oil after the catalyst, and after standing for 0.5h, filter and separate the insoluble matter;

[0031] 3) The insoluble matter was subjected to air oxidation treatment in an oven at 110°C to obtain bio-pitch 2.

Embodiment 3

[0032] Example 3 A preparation method of esterified bio-asphalt

[0033] 1) Mix 600g rice husk straw bio-oil with 90g 1,2-propanediol, add 18g inorganic acid salt NaHSO 4 , stirred and reacted at 120°C for 0.5h;

[0034] 2) Use water to extract step 1) to separate the bio-oil after the catalyst, and after standing for 0.5h, filter and separate the insoluble matter;

[0035] 3) The insoluble matter was subjected to air oxidation treatment in an oven at 120°C to obtain bio-pitch 3.

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Abstract

The invention relates to a preparation method of esterified biological asphalt. The preparation method comprises the following steps: 1) mixing bio-oil with alcohol, and adding a catalyst to perform esterification reaction; 2) extracting the esterified bio-oil obtained in the step 1) with water to obtain an insoluble matter; and 3) performing oxidation treatment on the insoluble matter obtained in the step 2) to obtain the esterified biological asphalt. By adopting the preparation method provided by the invention, heavy components of biomass oil can be effectively utilized and turned from wastes into treasure; and furthermore, by improving the process, the fuller reaction of alcohol and bio-oil can be promoted, and the esterification efficiency of the biological asphalt is improved. The prepared biological asphalt has the characteristics of low viscosity increasing speed, good aging resistance and the like.

Description

technical field [0001] The invention relates to an esterified biological asphalt and a preparation method thereof, belonging to the technical field of road engineering asphalt materials. Background technique [0002] With the development of the national economy, the role of transportation as an infrastructure is becoming more and more obvious. At present, the demand for road asphalt in my country is increasing day by day. The continuous rise in the price of asphalt has put a huge cost pressure on road construction. It is urgent to develop new asphalt substitutes. Material. [0003] my country is a large agricultural country, and it uses cheap crop wastes as raw materials, which can be described as "inexhaustible and inexhaustible". Obtain bio-oil by fast pyrolysis of crop waste, and then make bio-asphalt with certain viscoelasticity, which can be used as an environmentally friendly material to replace asphalt partially or completely, and can solve the shortage of petroleum a...

Claims

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Application Information

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IPC IPC(8): C10C3/02C10C3/08C10C3/04
CPCC10C3/04C10C3/08C11C3/04
Inventor 曹东伟张海燕何敏陈艳巨张美玉
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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