SL TEC has close to ten years experience in formaldehyde production technology based on silver contact process(or silver catalyzed process). A lower methanol consumption, higher formalin product concentration, high export steam capacity and ease of operation are our features, which makes it the best technical and economically viable solution.
SL TEC has close to ten years experience in formaldehyde production technology based on silver contact process(or silver catalyzed process). A lower methanol consumption, higher formalin product concentration, high export steam capacity and ease of operation are our features, which makes it the best technical and economically viable solution.
Every unit operation incl. methanol evaporation, catalytic reaction, absorption, off-gas treatment has optional design to at best satisfy the customer’s needs.
We provide one-stop package solutions from the formaldehyde plant design, manufacture, erection, commissioning, startup to training, with the production capacity of 6,000TPA – 120,000TPA and the formaldehyde product concentration varying from 37-55%. And according to the customer’s different needs, there are totally 7 (seven) optional processes as follows:
1) Traditional Bubble Evaporator + Absorber with 3 (three) Concentration Gradients to produce 37% formalin
2) New Evaporator + Absorber with 3 (three) Concentration Gradients to produce 37% formalin
3) Off-gas Circulation + Re-boiler + Absorber with 3 (three) Concentration Gradients to produce 37-42% formalin
4) Off-gas Circulation + Re-boiler + Absorber with 3 (three) Concentration Gradients to produce 37-55% formalin
5) Off-gas Circulation + Evaporation Column + Absorber with 6 (six) Concentration Gradients to produce 37-55% formalin
6) Off-gas Circulation + Multipurpose Evaporator + Absorber with 6 (six) Concentration Gradients to produce 37-55% formalin
Technical Features
-High Conversion Yield
-Low Methanol Consumption
-Large Steam Export
-Easy Operation
-Long Service Life of Reactor
-Low Formic Acid Content in Formalin Product
Performance
Specification of Product
|
S/N
|
Item
|
Index
|
|
1
|
Formaldehyde
|
37-49% WT
|
|
2
|
Methanol
|
≤1 % WT
|
|
3
|
Formic Acid
|
≤0.01 % WT
|
|
4
|
pH
|
3.5-4.0
|
|
5
|
Ash on dry basis
|
≤0.01 % WT
|
|
6
|
Temperature
|
45-65 oC
Controllable as per the formalin concentration
|
|
7
|
Colour PT-CO
|
≤10
|
|
8
|
Total Iron
|
≤0.0001% WT
|
Specific Consumption
|
S/N
|
Item
|
Unit Consumption
|
|
1
|
Methanol
(mt/mt @ 37% Formalin)
|
0.445
|
|
2
|
Catalyst
(kg)
|
150kg for per load
|
|
3
|
Power
(KWH/mt @ 37% Formalin)
|
28
|
|
4
|
Steam kg@0.1-0.4MPa consumed during plant startup
(kg/hr)
|
Depending upon the plant capacity
|
|
5
|
Steam production
(kg /mt @ 37% Formalin )
|
400kg0.4-0.8MPafromOff-gas Boiler
+
180kg0.2MPafrom Reactor WHB
|
|
6
|
Circulating Water
(mt/mt @ 37% Formalin)
|
70
|
|
7
|
Demineralized Water
(mt/mt @ 37% Formalin)
|
1.5
|
|
8
|
Instrumental Air
( Nm3/h)
|
30
|
