What are the reasons for the low recovery rate of triphenyl?

I don’t understand why a high temperature in the benzene removal tower leads to a low yield of triphenyl. Reasons: 1. The temperature of the gas entering the benzene washing tower is high. 2. The benzene content in the lean oil is high; the normal range for benzene content in lean oil is 0.2–0.4% (by mass). For every 0.1% increase in benzene content in the lean oil, the benzene yield decreases by 5%. What is the benzene content in your plant’s lean oil? 3. The temperature of the gas entering the benzene washing tower is high; the temperature of the gas returning to the tower under negative pressure is around 24 degrees, while it’s 25–30 degrees for gas returning under positive pressure. A high gas temperature increases the partial pressure of benzene on the liquid film, reducing the driving force for benzene absorption and thus lowering the benzene content in the rich oil. What’s the situation in your plant? 4. The temperature of the lean oil is high; when the gas temperature is normal, the temperature of the lean oil should be 2 degrees higher than the gas temperature (in summer) and 4 degrees higher (in winter). What’s the situation in your plant? 5. The gas-liquid ratio is 1.6–1.8 liters of washing oil per cubic meter of gas. What’s the ratio in your plant? 6. The conditions of gas-liquid contact, etc. Please describe the situation in your plant to determine what might be causing the problem