Supported metal hydroxide adsorbent for ultra-deep desulfurization of gasoline and methods for its preparation and its oxidative regeneration

A method for preparing a supported metal hydroxide adsorbent for ultra-deep desulfurization of gasoline, comprising the steps of:

• step 1:
• after dissolving a metal salt in water, then adding a support thereto and mixing well;
• step 2:
• adjusting a pH value of a mixture obtained in step 1 with an alkaline solution;
• and
• step 3:
• filtering a resultant suspension obtained in step 2, and drying a filtered solid at 60-120° C., and obtaining the supported metal hydroxide adsorbent for ultra-deep desulfurization of gasoline.

A method for oxidative regenerating a supported metal hydroxide adsorbent after adsorptive desulfurization of gasoline, comprising the steps of:

• step (1) after the supported metal hydroxide adsorbent reaching adsorption equilibrium in the adsorptive desulfurization of gasoline, separating the supported metal hydroxide adsorbent from gasoline and obtaining the supported metal hydroxide adsorbent loaded with adsorbates;
• wherein the gasoline contains sulfur compounds;
• step (2) immersing and washing the supported metal hydroxide adsorbent loaded with adsorbates in an oxidant-contained regenerant at 20-250° C.;
• and
• step (3) drying the supported metal hydroxide adsorbent loaded with adsorbates after the treatment of step 2 at 50-300° C. and obtaining a regenerated supported metal hydroxide adsorbent.