The coupling process of dehydrogenation of 1,4-butanediol and hydrogenation of dimethyl maleate over CuO/SiO2 catalysts to produce one important fine chemical γ-butyrolactone was carried out in a continuous fixed bed reactor under atmospheric pressure.

Several kinds of cationic exchange resin were evaluated in terms of catalyzing the reaction of methanol and maleic anhydride to produce dimethyl maleate in a fixed-bed reactor.

Catalytic synthesis of dimaleates with ammonium ferric sulfate;