A kind of preparation method of high softening point asphalt

A technology of high softening point asphalt and asphalt raw materials, applied in the processing of tar asphalt/petroleum asphalt/natural asphalt, chemical processing of tar asphalt/petroleum asphalt/natural asphalt, petroleum industry, etc., can solve uneven reaction, asphalt Surface coking, unresolved oil phase compatibility issues and other issues, to achieve the effect of reducing crushing links, increasing the softening point of asphalt, and low cost

Active Publication Date: 2018-09-25
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in patents such as CN103805219A, CN103710041A (110) and CN101906311A, light oils such as kerosene and gasoline are used as asphalt compatibilizers, which do not solve the compatibility problem of the interface between the oil phase (asphalt) and the water phase (additive) , the reaction mostly occurs at the oil-water interface, and the reaction is uneven; moreover, concentrated acid is directly mixed or injected with a metering pump at room temperature or higher than room temperature, and the violent exothermic reaction causes coking on the asphalt surface. Even so, the softening point of its product Still below 200°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The softening point of 150g is 78 o The coal tar pitch raw material of C is placed in a glass reactor, 50g of methanol is added to wet the raw material (the mass ratio of pitch to organic solvent is 3:1), and 600g of sulfuric acid with a mass fraction of 90% is added dropwise (the mass ratio of pitch to acid is 1:4), stirring and mixing reaction, wherein the temperature is controlled at 5 o C, the dropping speed is 2 mL / min, and the stirring speed is 500 r / min; o The heating rate of C / min is raised to 80 o C, after the reactant is converted into a solid, stop stirring and continue to use 10 o The heating rate of C / min is raised to 180 o C, and keep the temperature for 1 h; then at 80 o C is washed with sodium hydroxide solution and deionized water with a mass fraction of 50% in turn until the pH value of the washing solution is 7.5, and drying to obtain a softening point of 280 o C high softening point asphalt.

Embodiment 2

[0018] The softening point of 250g is 65 o The petroleum asphalt raw material of C is placed in a glass reactor, 50g of ethanol is added to wet the raw material (the mass ratio of asphalt to organic solvent is 5:1), and 300g of concentrated nitric acid with a mass fraction of 60% is added dropwise (the mass ratio of asphalt to acid is 5:1). 1:1.2), stirring and mixing reaction, wherein the temperature is controlled at 15 o C, the dropping speed is 0.5 mL / min, and the stirring speed is 50 r / min; o The heating rate of C / min is raised to 70 o C, after the reactant is converted into a solid, stop stirring and continue with 5 o The heating rate of C / min is raised to 120 o C, and keep the temperature for 4 h; then at 70 o C is washed with 5% potassium hydroxide solution and deionized water successively until the pH value of the washing solution is 8.0, and the softening point is 220 after drying. o C high softening point asphalt.

Embodiment 3

[0020] Set the softening point of 400g to 45 o The mixed raw material of coal tar pitch and biomass tar (the mass ratio of the two is 3:1) is placed in a glass reactor, and 20g of acetone and 20g of THF are added to wet the raw material (the mass ratio of pitch to organic solvent is 10:1) , add dropwise 200g of concentrated sulfuric acid with a mass fraction of 98% and 200g of concentrated nitric acid with a mass fraction of 65% (the mass ratio of asphalt to acid is 1:1), stir and mix the reaction, wherein the temperature is controlled at 10 o C, the dropping speed is 5 mL / min, and the stirring speed is 100 r / min; o The heating rate of C / min is raised to 60 o C, after the reactant is converted into a solid, stop stirring and continue with 5 o The heating rate of C / min is raised to 180 o C, and keep the temperature for 3 h; then at 75 o C is washed successively with 30% calcium hydroxide solution, 10% sodium hydroxide solution and deionized water until the pH value of the w...

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Abstract

The invention provides a preparation method of high-softening-point asphalt. The method comprises the following steps: putting an asphalt material into a reaction kettle, adding an organic solvent to wet the material, adding a reaction agent dropwise, performing stirring and mixing for reaction, wherein the temperature is controlled to 0-20 DEG C, the adding speed is 0.5-10mL / min, the stirring speed is 50-500r / min; raising the temperature to 60-100 DEG C at the rate of temperature increase being 0.5-5 DEG C / min after completing adding dropwise, stopping stirring after transforming a reactant into a solid, continuing to raise the temperature to 120-240 DEG C at the rate of temperature increase being 2-10 DEG C / min, keeping the temperature constant for 0.5-4 hours, and then reducing the temperature; then using an alkaline solution and deionized water for washing at the temperature of 60-90 DEG C until the PH value of a washing liquid is 7-8, and obtaining the high-softening-point asphalt after drying. The preparation method has the advantages of high yield, low cost, high quality and safe production.

Description

technical field [0001] The invention belongs to a method for preparing asphalt, in particular to a method for preparing asphalt with a high softening point. Background technique [0002] High softening point asphalt is also called high temperature asphalt, its softening point is usually at 200 o Above C, it has excellent high temperature resistance, so it has been widely used. As an important engineering material, it can play the role of plugging, anti-collapse, coating and bonding under high temperature conditions, such as being used in deep oil and gas field drilling fluid and building waterproofing. In addition, it can also be used as the precursor of activated carbon, especially when preparing spherical activated carbon with excellent performance, it can effectively prevent the precursor from melting and deforming at high temperature. [0003] At present, the production of high softening point asphalt generally adopts solvent deasphalting or gas blowing oxidation proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/02C10C3/00
CPCC10C3/00C10C3/023
Inventor 李开喜管涛涛
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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