Wang, Honghai published the artcilePreparation and Application of Magnetic Nano-Solid Acid Catalyst Fe3O4-PDA-SO3H, Safety of Ethyl 4-oxopentanoate, the main research area is iron oxide polydopamine sulfonic acid magnetic nanosolid catalyst.
A magnetic nano-solid acid catalyst Fe3O4-PDA-SO3H was synthesized through an efficient method, as an eco-friendly and more efficient catalyst. The obtained catalyst has uniform core-shell structure, appropriate particle size, and high acid d. Fe3O4-PDA-SO3H was applied to catalyze the esterification of levulinic acid (LA) with alcs. of different chain length to produce the levulinate esters. The catalytic effect was optimized from the aspects of catalyst dosage, reaction temperature, and acid-alc. molar ratio. Furthermore, the response surface optimization method was used to obtain the optimal conditions. Verified under these conditions, the exptl. results showed that the conversion rate of LA can reach 95.87%, which was much higher than common cationic exchange resin Amberlyst 36 and Amberlyst 46. Furthermore, the recovery and reuse of the Fe3O4-PDA-SO3H was demonstrated six times without obvious loss in the activity.
Energies (Basel, Switzerland) published new progress about Cation exchange. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Safety of Ethyl 4-oxopentanoate.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics