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Table 3 Conversion and selectivity in the coupling of PO and CO2 to produce PC catalysed by talc and vermiculite under different conditions

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

Entry Catalyst Temperature Pressure (Bars) PO Conversion [%] PC Selectivity [%]
1 Talc 100 20 59.3 94.4
2 Talc 100 30 60.5 94.6
3 Talc 120 30 68.7 94.2
4 Talc 130 30 87.6 94.3
5 Talc 140 10 97.5 93.6
6 Talc 140 20 98.0 93.9
7 Talc 140 30 98.9 93.7
8 Talc 140 35 99.0 93.4
9 Talc 150 30 99.3 92.2
10 Vermiculite 140 30 90.1 95.3
11 Vermiculite 150 30 92.6 93.7
12a Talc 140 30 70.8 94.0
13b Talc 140 30 99.2 92.8
14c Talc 140 30 95.3 87.0
15d Talc 140 30 96.8 92.4
  1. Reaction conditions: propylene oxide (10 mmol), catalyst (100 mg), TBAB (2.5 mol % of epoxide), CO2 (10–35 bars), MeCN (5 ml), Temperature (100–150 °C), Time (20 h)
  2. PO propylene oxide, PC  propylene carbonate
  3. aTime 12 h
  4. bTime 24 h
  5. cCH2Cl2 solvent
  6. dDMF solvent