Manufacturing method of ultra-temperature pitch

Abstract

The invention relates to a manufacturing method of ultra-temperature pitch using coal pitch as a raw material, comprising the following steps of: a, evenly heating a medium-temperature liquid coal pitch raw material insulated at the temperature of 180 DEG C at the speed of 13-15 DEG C per hour and mixing by starting a mixing device when the temperature raises to 250 DEG C in a kettle; b, carryingout oxidation reaction when the temperature raises to 320 DEG C in the kettle and carrying out reduced pressure distillation after the distillate quantity is stable; c, when the temperature raises to375+ / -5 DEG C, stopping raising the temperature, maintaining the temperature, sampling, analyzing softening points until the softening points satisfy product requirements, wherein the total oxidationreaction time reaches 5-10 hours; stopping heating, introducing air and evacuating, discharging, and cooling to the normal temperature. The manufacturing method of ultra-temperature pitch can not cause local overheating concentration, leads aggregated molecules to have even distribution and stable quality, can produce high-temperature and ultra-temperature pitch according to requirements, shortens the production time, prolongs the service life of a device, and greatly improves the product quality.

Description

technical field [0001] The invention relates to a method for producing ultra-high-temperature asphalt using coal tar pitch as a raw material. Background technique [0002] Coal tar pitch raw materials can be processed into asphalt products with different quality parameters through the subsequent distillation process. According to the different uses of asphalt products, the requirements for asphalt parameters are also different. Among them, the softening point of asphalt is an important characteristic parameter. The existing asphalt production methods mainly include horizontal kettle intermittent atmospheric distillation method, tubular furnace continuous atmospheric distillation method, horizontal kettle vacuum distillation method and other methods. These traditional processes are mainly used to produce low softening point For medium-temperature and modified asphalt, the softening point of the product usually can only reach 120°C at most. If you want to produce asphalt with ...

AI Technical Summary

Problems solved by technology

The existing asphalt production methods mainly include horizontal kettle intermittent atmospheric distillation method, tubular furnace continuous atmospheric distillation method, horizontal kettle vacuum distillation method and other methods. These traditional processes are mainly used to produce low softening point For medium-temperature and modified asphalt, the softening point of the product usually can only reach 120°C at most. If you want to produce asphalt with a high softening point, these production processes have problems such as easy coking, blockage, easy damage to equipment in the distillation system, and unstable product quality. The molecular distribution of asphalt products is not easy to be uniform, frequent cleaning of the kettle is required, serious pollution and other defects

If the ultra-high temperature asphalt products with a softening point of 170°C to 320°C are produced, the traditional production process is difficult to achieve

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