alter, change, modify - cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue"

dehydrogenate - remove hydrogen from

process, treat - subject to a process or treatment, with the aim of readying for some purpose, improving, or remedying a condition; "process cheese"; "process hair"; "treat the water so it can be drunk"; "treat the lawn with chemicals" ; "treat an oil spill"