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A kind of preparation method of high softening point asphalt

A high softening point asphalt, softening point technology, applied in the processing of tar asphalt/petroleum asphalt/natural asphalt, chemical processing of tar asphalt/petroleum asphalt/natural asphalt, petroleum industry, etc. It can eliminate the problems of low rate and low softening point, and achieve the effect of eliminating material transfer, improving product yield and improving asphalt softening point.

Active Publication Date: 2019-09-10
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

[0006] Aiming at the problems of easy coking, low yield and low softening point in the current process of preparing high softening point asphalt, the present invention proposes a method for preparing asphalt products with high softening point and high yield by catalyzing the crosslinking reaction of asphalt components Methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 100 g softening point 75 o The coal tar pitch powder (80 mesh) of C is placed in a high-pressure reactor, and 1 g of anhydrous aluminum chloride powder (80 mesh) and 10 g of chloroform solution are added at room temperature, and the mixture is evenly mixed at a speed of 50 r / min. , then with 5 o The heating rate of C / min is raised to 250 o C, depending on the self-increasing pressure in the kettle, keep the pressure for 1 hour; after exhausting and releasing the pressure, the temperature is lowered and the material is discharged, and the softening point of the obtained asphalt product is 228 o C, 80% yield.

Embodiment 2

[0017] 200 g softening point 45 o C petroleum asphalt powder (60 mesh) is placed in a high-pressure reactor, and 10 g of anhydrous ferric chloride powder (80 mesh) and 10 g of carbon tetrachloride solution are added at room temperature, and stirred at a speed of 500 r / min Mix well, then add 10 o The heating rate of C / min is raised to 350 o C, depending on the self-increasing pressure in the kettle, keep the pressure for 4 hours; after exhausting and releasing the pressure, the temperature is lowered and the material is discharged, and the softening point of the obtained asphalt product is 264 o C, yield 73%.

Embodiment 3

[0019] Soften 200 g to a point of 80 o The coal tar pitch grinding powder (60 mesh) of C is placed in a high-pressure reaction kettle, and 1 g of anhydrous aluminum chloride powder (80 mesh), 5 g of anhydrous ferric chloride powder (80 mesh), 10 g of four Carbon chloride solution and 10 g chloroform solution, stir and mix evenly, the rotating speed is 200 r / min; o C / min heating rate to 300 o C, depending on the self-increasing pressure in the kettle, keep the pressure for 3 hours; after exhausting and depressurizing, the temperature is lowered and the material is discharged, and the softening point of the obtained asphalt product is 271 o C, yield 78%.

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Abstract

The invention relates to a high-softening-point asphalt preparation method. The preparation method comprises the following steps: putting asphalt raw material powder of which the softening point is lower than 100 DEG C in a high-pressure reaction kettle, adding a catalyst and crosslinking agent at room temperature, uniformly stirring and mixing at a rotation speed of 50-500 r / min, heating to 200-350 DEG C at a heating rate of 2-10 DEG C / min, performing pressure-maintained reaction for 1-8 hours based on the self-lifting pressure in the kettle, degassing to relieve the pressure, cooling, and discharging to obtain high-softening-point asphalt. The preparation method has the advantages of high softening point and high yield.

Description

technical field [0001] The invention belongs to a method for preparing high softening point asphalt by catalytic crosslinking. Background technique [0002] High softening point pitch has high coking value and excellent high temperature resistance, and it has been widely used in carbon refractories, pitch-based carbon fibers and spherical activated carbon. Especially in the preparation process of pitch-based spherical activated carbon, the selection of high-softening-point pitch raw materials can effectively prevent the small spheres from melting, deformation and bonding during processing. [0003] Traditionally, the production of high softening point bitumen generally adopts solvent deasphalting or gas blowing oxidation process. The former usually uses low-carbon alkanes to circulate and extract bitumen raw materials to reduce the content of light components. As described in the invention patent CN202766477U, butane is used as an extractant to extract coal tar pitch under...

Claims

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Application Information

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