sulphatize
/ˈsʌlfətaɪz/Definitions
1. verb
to convert into a salt of sulphuric acid, or to add a sulphate to
“The process of sulphatizing the rocks helped preserve their historical significance.”
2. verb
to treat with a solution of sulphuric acid, especially in the manufacture of leather
“The tannery used a sulphatizing process to soften the hide.”