8
Z. Karimi et al. / Inorganica Chimica Acta 376 (2011) 1–9
Round 1
Round 2
Round 3
Round 4
1
00
0
SBA/HMPAW
SBA/HMPAMo
[SBA-NH2]/HMPAW
Catalyst
[SBA-NH2]/HMPAMo
Fig. 5. Catalytic activity of heterogeneous catalysts during the recycling process for cyclooctene epoxidation.
catalysts, a slight reduction is evidenced in the epoxide yield
Fig. 5) which may be attributed to leaching of unstable immobi-
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