Acid intensity of haloid acid is compared with according to thermodynamics theory.

Synthesis of p-Nitro-ethyl benzoate with potassium bisulfate as catalyst;

Synthesis of butyl isovalerate synthesis catalyzed by potassium bisulfate

Normal propyl cinnamylate was synthesized by the esterification of normal propyl alcohol with cinnamic acid in the presence of potassium bisulfate monohydrate.

Coupling reaction of formaldehyde and methyl formate over sodium bisulfate catalyst;

Synthesis of neopentyl glycol dimethacrylate catalyzed by sodium bisulfate;

Synthesis of tributyl citrate with sodium bisulfate as catalyst;

Synthesis of fructone-B with sodium hydrogen sulfate catalyst;

Synthesis of isoamyi propionate catalyzed by sodium hydrogen sulfate under microwave irradiation;

Utilization of by-product sodium hydrogen sulfate from chromic acid production;

The results indicated that alkali metal sulfate and some heavy metal sulfate,especially potassium hydrogen sulfate and zirconium sulfate,has better catalytic ability than concentrated sulfuric acid to .

The results indicated that potassium hydrogen sulfate and zirconium sulfate had high catalytic activity.

Suitable factors of preparation of intermediate product potassium hydrogen sulfate and neutralizing reaction of potassium hydrogen sulfate with ammonia is given.