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Production process for producing modified asphalt from medium-low-temperature coal tar heavy components

A technology of low-temperature coal tar and modified asphalt, which is applied in the direction of chemically processing tar pitch/petroleum pitch/natural pitch, tar processing by distillation method, etc., to achieve the effects of controllable product quality and simple production process

Inactive Publication Date: 2018-07-24
HUANGHUA XINNUOLIXING FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, there is no mature production process suitable for the production of modified asphalt from heavy components of medium and low temperature coal tar in China.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The medium and low temperature coal tar heavy components produced in the medium and low temperature coal tar processing process are used as raw materials. The indicators: toluene insolubles 4.4%, quinoline insolubles 1.9%, softening point 86.5°C, coking value 29.8%, ash 0.2%, passed The asphalt pump is heated to 175°C through the asphalt heat exchanger, mixed with the asphalt from the asphalt circulation pump, enters the modified asphalt heating furnace to be heated to 400°C, and then enters the modified asphalt reactor for modification. A part of the light oil flashes into the flash oil condenser to condense and then enters the heavy oil intermediate tank. A part of the modified bitumen is recycled, and a part is recovered. The recovered part enters the vacuum flash evaporator, and the heavy oil is removed under a vacuum degree of 85kPa to obtain Products Modified Bitumen. The vacuum flash oil gas is condensed by the heavy oil condenser, enters the heavy oil separator ...

Embodiment 2

[0041] The medium and low temperature coal tar heavy components produced in the medium and low temperature coal tar processing process are used as raw materials. The indicators: toluene insoluble matter 5.3%, quinoline insoluble matter 2.4%, softening point 90°C, coking value 32.5%, ash content 0.2%, passed The asphalt pump is heated to 170°C through the asphalt heat exchanger, mixed with the asphalt from the asphalt circulation pump, enters the modified asphalt heating furnace to be heated to 390°C, and then enters the modified asphalt reactor for modification. A part of the light oil flashes into the flash oil condenser to condense and then enters the heavy oil intermediate tank. A part of the modified bitumen is recycled, and a part is recovered. The recovered part enters the vacuum flash evaporator, and the heavy oil is removed under a vacuum degree of 85kPa to obtain Products Modified Bitumen. The vacuum flash oil gas is condensed by the heavy oil condenser, enters the he...

Embodiment 3

[0044]The medium and low temperature coal tar heavy components produced in the medium and low temperature coal tar processing process are used as raw materials. The indicators: toluene insolubles 4.1%, quinoline insolubles 1.6%, softening point 85.5°C, coking value 26.8%, ash 0.2%, passed The asphalt pump is heated to 175°C through the asphalt heat exchanger, mixed with the asphalt from the asphalt circulation pump, enters the modified asphalt heating furnace to be heated to 400°C, and then enters the modified asphalt reactor for modification. A part of the light oil flashes into the flash oil condenser to condense and then enters the heavy oil intermediate tank. A part of the modified bitumen is recycled, and a part is recovered. The recovered part enters the vacuum flash evaporator, and the heavy oil is removed under a vacuum degree of 85kPa to obtain Products Modified Bitumen. The vacuum flash oil gas is condensed by the heavy oil condenser, enters the heavy oil separator f...

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Abstract

The invention relates to the technical field of processes of producing modified asphalt, in particular to a production process for producing modified asphalt from medium-low-temperature coal tar heavycomponents, and the production process is simple, is controllable in product quality, and is more energy-saving and environmentally friendly. The production process comprises the following steps: 1)preparing raw materials: medium-low-temperature coal tar heavy components and asphalt; 2) preparing equipment: an asphalt heat exchanger, a modified asphalt reaction kettle, a modified asphalt heatingfurnace, a vacuum flash evaporator, an asphalt middle slot, a heavy oil separator, a heavy oil middle slot, a vacuum condenser, a vacuum slot and a flash-evaporating oil separator; and 3) putting theasphalt into the modified asphalt reaction kettle, heating the medium-low-temperature coal tar heavy components through the asphalt heat exchanger to mix with part of asphalt from the modified asphalt reaction kettle, entering the modified asphalt heating furnace to heat, and entering the modified asphalt reaction kettle to modify.

Description

technical field [0001] The invention relates to the technical field of the technology for producing modified asphalt, in particular to a production technology for producing modified asphalt by using medium and low temperature coal tar heavy components. Background technique [0002] As we all know, modified pitch, as the main downstream product of coal tar pitch, is used in the electrolytic aluminum industry to produce prebaked anodes, and to prepare battery rods or electrode binders. [0003] At present, most domestic coal tar pitch processing enterprises use medium-temperature pitch produced by high-temperature pitch as the raw material for modified pitch, and produce modified pitch products through kettle-type thermal polycondensation processing technology or flash evaporation technology. There is no report on the production of modified asphalt products, which are generally used to prepare oil products with certain characteristics for sale. [0004] Invention patent CN105...

Claims

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Application Information

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IPC IPC(8): C10C3/02C10C1/16
CPCC10C1/16C10C3/02
Inventor 周小野张新建于锦军刘德升
Owner HUANGHUA XINNUOLIXING FINE CHEM
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