Ketene Cracking Furnaces
Acetic acid is overheated in a cracking furnace to temperatures of approx. 700°C and catalytically cracked into ketene. Ketene then further processed in subsequent processes into diketene, isopropenyl acetate and acetyl acetate.
These substances are important base products for pharmaceutical products (aspirin, vitamins), and for the paint and dye industry and the textile/fibre industry.
| since 1957 |
|
20 new plants and 2 upgrades |
| Acetic acid capacity: |
|
1,000 - 3,500 kg/h |
| Acetic acid conversion rate: |
|
85% |
| Absorbed heat: |
|
1,14 - 3,5 MW |
| Mediums outlet temperature: |
|
690 - 740 °C |
| NOx-emissions: |
|
150 - 200 mg/Nm³ ( depending on air preheating) |
| Furnace type: |
|
Box furnace with additional convection zone |
| Firing: |
|
Even heat current density distribution through side wall firing at several levels forced circulation (opt. with air preheating) |
| Tube layout: |
|
horizontal, double fired |
