Related Products of 2144-40-3, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 2144-40-3, (cis-Tetrahydrofuran-2,5-diyl)dimethanol, introducing its new discovery.
Towards sustainable hydrogenation of 5-(hydroxymethyl)furfural: A two-stage continuous process in aqueous media over RANEY catalysts
The hydrogenation of 5-(hydroxymethyl)furfural (HMF) to 2,5-bis(hydroxymethyl)tetrahydrofuran (DHMTHF) in aqueous media under relatively mild reaction conditions has been investigated over heterogeneous RANEY Cu and Ni catalysts using a continuous-flow hydrogenation reactor. These RANEY catalysts were selected following a screening of several catalysts including precious metals supported on carbon for the hydrogenation of HMF. A single-stage versus a two-stage process for the hydrogenation of HMF into DHMTHF, i.e. via 2,5-dihydroxymethylfuran (DHMF) has been evaluated. The best result with an average selectivity of 98% for DHMTHF was obtained using a two-stage process; RANEY Cu was used as a catalyst for the highly selective hydrogenation of HMF to DHMF (92 mol%) in the first stage and this product was used without further purification for in a second-stage selective hydrogenation of DHMF into DHMTHF using RANEY Ni as a catalyst. The influence of the HMF concentration in the feeding solution (1-3 wt%), flow rate (0.05-0.25 mL min-1) and total pressure (20-90 bar) were investigated for the first-stage hydrogenation of HMF into DHMF over RANEY Cu. HMF was found to exert an inhibiting effect on the conversion due to strong adsorption. The RANEY Ni catalyst used in the second stage gradually deactivated. A procedure for in situ regeneration of the partially deactivated RANEY Ni catalyst using acetic acid washing was investigated with limited success.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Related Products of 2144-40-3. In my other articles, you can also check out more blogs about 2144-40-3
Reference£º
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem