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Table 2 Conversion and selectivity in the coupling of propylene oxide (PO) and CO2 to produce propylene carbonate (PC) catalysed by various phyllosilicates at 120 °C

From: Synthesis of cyclic carbonates from epoxides and carbon dioxide catalyzed by talc and other phyllosilicates

Entry Catalyst Co-catalyst PO Conversion [%] PC Selectivity [%]
1a Biotite Trace
2a Chlorite 4.3
3a Phlogopite 3.7
4a Talc 10.2 27.5
5a Vermiculite 8.6 30.1
6 Biotite TBAB 44.5 68.3
7 Chlorite TBAB 55.0 70.4
8 Phlogopite TBAB 48.6 72.0
9 Talc TBAB 68.7 94.2
10 Vermiculite TBAB 60.3 96.1
11 Talc TBAI 65.4 93.6
12 Talc DMAP 36.9 84.7
13b TBAB 42.0 96.8
  1. Reaction conditions: propylene oxide (10 mmol), catalyst (100 mg), co-catalyst (2.5 mol % of epoxide), CO2 (20 bars), CH3CN (5 ml), Time (20 h)
  2. aNo co-catalyst
  3. bNo phyllosilicate