Glutaraldehyde-crosslinked Rhizopus oryzae whole cells show improved catalytic performance in alkene epoxidation

Table 5 Alkene epoxidation with different H₂O₂ content

Entry^a	Content of H₂O₂ (mmol)	Initial reaction rate^b (mmol/L/h)	Conversion (%)^c	yield (%)^c
1	1	93.99 ± 6.41	57.21 ± 0.82	49.17 ± 1.22
2	2.5	121.87 ± 9.26	91.99 ± 0.04	74.5 ± 1.99
3	5	176.15 ± 1.78	99.89 ± 0.08	91.37 ± 1.94
4	7.5	232.88 ± 1.76	99.65 ± 0.07	92.04 ± 3.08
5	10	239.81 ± 5.23	99.73 ± 0.11	86.75 ± 0.24
6	15	–	74.53 ± 5.6	67.96 ± 8.45
7	30	–	20.56 ± 7.12	12.8 ± 1.99
8	45	–	6.37 ± 5.28	6.25 ± 0.89
9	1	4.22 ± 0.09	22.17 ± 0.35	8.13 ± 0.54
10	2.5	4.35 ± 0.91	49.15 ± 0.36	36.68 ± 1.97
11	5	5.29 ± 0.05	62.11 ± 0.33	45.77 ± 2.3
12	7.5	5.79 ± 0.19	66.44 ± 0.91	56.24 ± 3.95
13	10	6.34 ± 2.35	63.95 ± 1.41	56.3 ± 0.59
14	1	6.31 ± 0.3	15.91 ± 0.88	14.25 ± 2.1
15	2.5	6.62 ± 1.18	68.82 ± 0.42	50.02 ± 3.94
16	5	9.23 ± 2.65	83.53 ± 0.42	65.35 ± 4.49
17	7.5	9.59 ± 0.19	89.02 ± 0.64	76.56 ± 1.22
18	10	9.72 ± 1.39	84.79 ± 1.15	70.38 ± 1.69

^aA mixture of alkene (1 mmol), octanoic acid (1 mmol), 30% (v/v) H₂O₂ (1−10 mmol), and Na₃C₆H₅O₇ (3.5 mmol) in toluene (1.5 mL) was shaken at 180 rpm and 30 °C
^bThe value obtained at 30 min for pinene and 60 min for octene and styrene, respectively
^cThe value obtained at 6 h for pinene, 50 h for octene and 58 h for styrene, respectively

ISSN: 1475-2859