What should be the temperature at which the third fraction is extracted in an atmospheric pressure tower? What are the hazards of too high or too low temperatures?
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What should be the temperature at which the third fraction is extracted in an atmospheric pressure tower? What are the hazards of too high or too low temperatures?
The extraction temperature varies depending on the tower top pressure. Also, it depends on what temperature you want to keep the 95% point at for your regular third-line setting. Most are kept around 320°C. Too high a value will result in 95% failure rates, while too low a value will lead to insufficient yields.
This depends on your requirements for the products to be obtained. The process steps in the atmospheric and vacuum distillation units at our plants often change, primarily due to the processing techniques used downstream; for example, changes in process temperatures are necessary when dealing with diesel, wax oil, fuel oil, etc., as part of tax avoidance measures. Additionally, these changes are also influenced by the needs of subsequent hydrogenation processes and the production of lubricating oils, and there are specific temperature parameters defined for such operations.