It is then injected with UOP 's proprietary liquid catalyst ( on an as needed basis ) , flows through a steam - heated heat exchanger .
It is then is injected with compressed air before entering the oxidizer vessel where the extracted mercaptans are converted to disulfides .
It is then injected with UOP 's proprietary liquid catalyst ( on an as needed basis ) , flows through a steam - heated heat exchanger and is injected with compressed air before entering the oxidizer vessel where the extracted mercaptans are converted to disulfides .