Cleaner Production Assessment of Fast Bordeaux GP Base
Table 3
The comparison of existing and proposed practice.
Sr. no.
Process steps
Water consumption in kl
Effluent generation in kl
Recovered by-product
Existing process: Reaction temperature was maintained to 70°C by the addition of ice and reaction time of 3.5 h (3 h for acetylation and 30 min for neutralization with soda ash); yield was 90%.
(1)
Acetylation
Nil
76
—
(2)
Nitration
225
258
—
(3)
Hydrolysis
275
280
—
(4)
Neutralization
10
116
—
Total
510
729
—
Proposed process: Reaction temperature was 120°C, in reaction time of 3 1/2 h (3 h for acetylation and 30 min for distillation of excess acetic acid); yield was 95%.
