| 摘要 |
The catalyst is specifically selective when hydrogenating mixtures of olefins, when linear olefins are hydrogenated, but not branched ones. The catalyst is prepd. by suspending a reducible metal cpd. (of Pt, Fe, Pd, etc.) in a polymerisable monomer, suitable also for carbonising (pref. furfuryl-(2)-alcohol), reducing the cpd. to the colloidal metal with formaldehyde, polymerising the monomer by warming in presence of H3PO4 and finally curing the polymer above 110 degrees C, all this under N2. The cured polymer is carbonised at 640 degrees C for 4 hrs. under N2. Active particles on the surface are poisoned to maintain the selectivity. Alternatively the catalyst may be coated with the above mentioned polymer, which is the carbonised as shown. The same treatment may be applied to a metal/carrier catalyst, the carrier being any other suitable substance. The catalyst is very resistance to poisoning. |
