Discussion on Raising the Flash Point of Asphalt
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Are there any companies that produce asphalt using atmospheric and vacuum distillation? What is the flash point of asphalt, and how can it be increased?
Yes, many companies still use atmospheric and vacuum distillation processes to produce road asphalt. Under normal circumstances, the flash point of road petroleum asphalt is usually above 240°C (as determined by the open cup method). If the flash point of asphalt is low, it needs to be increased through the following methods: 1. Raise the temperature at the top of the vacuum distillation tower, and appropriately reduce the content of light fractions in the heavy components ； 2. Improve the process conditions for pressure reduction, enhance the stripping process, and remove light fraction impurities ； 3. Optimize the raw materials and strictly control the content of light components in the crude oil fed into the unit ； 4. Enhance the heating and air-removal measures for the finished asphalt storage tanks to ensure that volatile components are fully vented, thereby stabilizing product quality. In summary, raising the flash point of asphalt mainly involves reducing the content of light hydrocarbon fractions and volatile components within it, thereby improving its safety performance. .