What is the purpose of incorporating an oil separator in some deicer boot systems?

The purpose of incorporating an oil separator in some deicer boot systems is to remove oil before it damages the rubber boots. Deicing boots, typically made from rubber, are crucial for maintaining the aerodynamic performance of an aircraft by preventing ice buildup on the wings and control surfaces. Oil from the engine and other system components can inadvertently mix with the air used to inflate these boots, potentially leading to the degradation of the rubber material. Installing an oil separator ensures that this oil is filtered out before it can reach the boots, thereby prolonging their service life and maintaining the effectiveness of the deicing system. This protection is vital for ensuring that the aircraft remains safe and efficient during operations in icy conditions.