186
Table 9 First stage catalysts of two-stage process and their performances
Company
Catalyst composition
Operating condition (feed propylene
and air)
Results
C
3 H
6 (%)
Air
(%)
Temp
(°C)
Conv.
(%)
ACR
(%)
AA
(%)
ACR yield
(%)
Total yield
(%)
SOHIO [143]
Mo-Bi/SiO
2
9.5
53.3
454
56.9
71.8
40.9
Knapsack [144]
Mo-Bi-Fe-P
9.7
4.1
400
70
84
58.8
Nippon Kayaku [145, 146]
Mo
12 Bi
1 Fe
1 Ni
4.5 Co
4 P
0.08
5.9
58.8
310
95.5
82.8
6
79.1
84.8
Mo
12 Bi
1 Fe
2 Ni
1 Co
3 P
2 K
0.2
6.2
62.5
305
96
92
3
88
91
Nippon Shokubai [147, 148] Mo
10 Bi
1 Fe
1 W
2 Co
4 K
0.06 Si
1.35
4
51
320
97
93
6.2
90.2
96.2
Sumitomo-Chemical [149]
Mo
12 Bi
1 Fe
5.1 Ni
6 Tl
0.3 P
0.1 Mg
3
6.7
46.7
375
96.3
86.6
7.1
83.6
90.4
Mitsubishi Petrochemical
[150, 151]
Mo
12 Bi
1 Fe
0.4 Ni
4.5 Co
4 B
0.1 Na
0.05 S
i
6.3
4.5
53
350
99.4
81.4
13.6
80.9
94.4
Ube Industries [152]
Mo
10 Bi
0.9 Fe
2 Co
8 V
0.05 K
0.05
6.7
67.6
330
98.8
91.4
2.4
90.3
92.7
ACR%
acrolein selectivity, AA%
acrylic acid selectivity
C. Samanta and R. K. Das