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Table 3 Catalytic reusability of Sm0.33[TEAPS]2PW12O40 for the rosin dimerization

From: A novel Brönsted–Lewis acidic heteropoly organic–inorganic salt: preparation and catalysis for rosin dimerization

Catalyst recycle times

Softening point (°C)

Acid value (mg/g)

0

120.1

111.8

1

114.3

125.8

2

115.0

120.3

3

126.1

124.5

4

120.4

93.7

5

120.3

96.0

  1. Reaction conditions: catalyst 5.0 g, rosin 15 g, toluene 18 mL, 90 °C, 10 h
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