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Table 4 Conversion and selectivity in the coupling of CO2 and PO to produce PC catalysed by phyllosilicates calcined at different temperatures

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

Entry Catalyst Calcination Temperature PO Conversion [%] PC Selectivity [%]
1 Talc 100 98.9 93.7
2 Talc 300 96.7 94.5
3 Talc 500 95.3 94.2
4 Vermiculite 100 90.1 95.3
5 Vermiculite 300 89.4 96.1
6 Vermiculite 500 87.6 96.4
7[a] Talc 100 97.5 92.5
8[a] Vermiculite 100 88.2 95.6
10[b] Talc 100 96.5 92.8
  1. Reaction conditions: propylene oxide (10 mmol), catalyst (100 mg), TBAB (2.5 mol % of epoxide), CO2 (30 bars), MeCN (5 ml), Temperature (140 °C), Time (20 h)
  2. PO propylene oxide, PC propylene carbonate
  3. aco-catalyst TBAI
  4. bTalc catalyst dried at 100 °C and stored in a vial for 3 months