2. Molecular Weight of Acetanilide is
a) 137 gm/mole
b) 130 gm mole
c) 135 gm/mole
d) 136 g/mole
e) 121 gm mole
1) 116 gm/mole
Answers
Answer:
Manufacturing Process:
Diazotization Preparation: Dissolve 2,5-dichloroaniline in water and
hydrochloric acid, Stir it for 1 hour, cool it to - 5 ºC by cruising ice. Add
rapidly sodium nitrite solution. Maintain temperature below 10ºC temp
and stir for 1 hr. Filter it by press filter, Use it for coupling.
Coupler Preparation: Dissolve 3’3-dimethylbyphenyl-3-oxobutanamide
in sodium hydroxide solution. Cool to 10ºC temp.
Coupling: Add above prepared diazo solution in coupler solution with in
about 1 hour. After complete addition pH is 3-4. During addition maintain
temp 10-15 ºC, stir for 1 hr. At this temp heat the mass to 40 ºC and
sodium acetate to get pH 4.0-4.5. The coupled pigment slurry is sent for
further process.
Conditioning / Heating: Heat the mass pigment slurry at 90ºC temp.
Maintain this temperature for 30 min. Cool to 70 ºC temp.
Filtration and washing: Filter the pigment slurry and wash with water
up to salt free. Filtrate and wash water are sent to ETP.
Drying and Packaging: Wet cake is then dried and pulverized. Then
sent to packaging.
Chemical Reaction:
+
3,3-Dichlorobenzidine 1mole
Mol Wt: 162.02 gm/mol
C6H5Cl2N
3'3-dimethylbyphenyl-3-oxobutanamide
(Acetoacet-2-toluidide) 2 mole
Mol Wt: 380.44 g/mol
C22H24N2O4
Pigment Yellow 16
Mol Wt: 726.44 gm/mol
C34H28Cl4N6O4
2
H3C
C
Answer:
135.17 g/mol
135 is correct answer