The Collaborative International Dictionary
Desulphurating
Desulphurate \De*sul"phu*rate\, v. t. [imp. & p. p. Desulphurated; p. pr. & vb. n. Desulphurating.] To deprive of sulphur.
Wiktionary
desulphurating
vb. (present participle of desulphurate English)