| 摘要 |
1310476 Dimerisate catalyst SOC ITALIANA RESINE SpA 16 Nov 1971 [26 Nov 1970] 53145/71 Heading B1E [Also in Division C5] A catalyst for the dimerisation of propylene to produce 4 methyl-1-pentene is made by suspending graphite in an aqueous alkaline solution at a temperature of at least 40‹C for at least 30 minutes, separating and washing free of alkali with hot water, drying for at least 5 hours at 100 to 150‹C; heating in a weak flow of inert gas from 1 to 5 hours at a temperature between 200 and 300‹C, adding after cooling to 150 to 180‹C into 35 percent of alkali metal and calcining in an inert gas stream below 350‹C for 1 to 10 min. |
