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Sustainable Chemical Processes

Table 1 Recycling results of sulfolene solvents

From: Butadiene sulfone as ‘volatile’, recyclable dipolar, aprotic solvent for conducting substitution and cycloaddition reactions

Entry

Solvent

Scale (mL)

SO2/diene molar ratio

Cold bath (°C)

Recovered solvent (%)

1

PS

5

8

−55

89 ± 2

2

PS

20

6

−60

98 ± 0

3

BS

20

6

−76

95 ± 1a

  1. aTwo replicates, one of them is added with inhibitor
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