Acetic anhydride is a chemical compound with the formula (CH3COO)2, which is commonly used as a reagent in the synthesis of various chemical products. The manufacturing of acetic anhydride typically involves the reaction of acetic acid with an alcohol, such as isopropyl alcohol, in the presence of a strong acid catalyst, such as sulfuric acid.
With more than 20 years of experience, Attomo Industries specializes in engineering process equipment manufacturing for the establishment and upkeep of Acetic Anhydride Plants. Our commitment to excellence ensures the delivery of high-quality Acetic Anhydride Plants. With our expertise and commitment to excellence, we offer a comprehensive range of services, including designing, engineering consultation, and complete facilitation for all your project needs.
Manufacture of Acetic Anhydride (Ketene Route)
Acetic Acid is evaporated and after adding catalyst is passed through a series of coils placed in a furnace. The Pyrolysis of acetic acid takes place in the coils placed in the furnace and products of pyrolysis are ketene and water.
The exit gases from the furnace i.e. ketene, water, unconverted acid etc. are immediately cooled in a series of coolers to condense water and unconverted acid. The condensate from these coolers is sent to recovery section to recover acetic acid. The ketene gas is scrubbed with acetic acid in a series of scrubber towers to produce acetic anhydride.
The over flow from the scrubbers i.e. Crude acetic anhydride subjected to fractional distillation to obtain pure acetic anhydride.
The Whole process is carried under reduced pressure.
MANUFACTURE OF ACETIC ANHYDRIDE
CONSUMPTION COEFFICIENTS BASIS 1000 KGS. ACETIC ANHYDRIDE
| 1. Acetic acid | 1285 Kgs |
| 2. Dry Saturated steam at 8 Kg/Cm2 | 5500 Kgs |
| 3. Electric power (Battery limit) | 180 KWH |
| 4. Cooling Water | 260 M3 |
| 5. Process Water | 0.5 m3 |
| 6. Referigeration at 4° C | 10TR |
| 7. Referigeration at – 10°C | 3TR |
| 8. Light Diesel Oil | 250 Ltrs. |
| 9. Tri Ethyl Phosphate | 2.5 Kgs |
| 10. Ammonia | 1 Kgs. |
| 11. Solvent | 25 Kgs. |
Applications for the manufacture of the following chemicals:
- Acetate Silk
- Cell Wool
- Plastic Materials
- Aspirin
- Pharmaceutical Chemicals
- Medicinal Chemicals
Frequently asked question about Acetic Anhydride Plant
The Ketene Route is considered the most efficient industrial process for manufacturing Acetic Anhydride. It involves the thermal decomposition (Ketene cracking) of Acetic Acid in a furnace to produce ketene gas and water. The ketene is then scrubbed with Acetic Acid in specialized towers to yield high-purity crude Acetic Anhydride through fractional distillation.
To produce 1,000 Kgs of pure Acetic Anhydride, approximately 1,285 Kgs of Acetic Acid is required as the primary feedstock. This consumption coefficient assumes a high-efficiency plant setup where unconverted acid is recovered. Additional utilities, including 5,500 Kgs of dry saturated steam and 180 KWH of electric power, are essential for the reaction.
Acetic Anhydride is a critical chemical reagent used predominantly in the synthesis of pharmaceuticals like Aspirin and medicinal chemicals. Beyond medicine, it is vital for producing Acetate Silk, Cell Wool, and various plastic materials. Attomo Industries designs specialized process equipment to ensure the output meets the stringent purity standards required for these applications.
Yes, Attomo Industries offers comprehensive turnkey services for Acetic Anhydride plants, including design, engineering consultation, and fabrication. With over 20 years of expertise, the company handles the manufacturing of critical equipment like distillation column trays and Ketene cracking coils. We facilitate the entire project lifecycle, ensuring seamless integration of recovery sections and scrubber towers.
Ketene cracking is the foundational step where Acetic Acid is evaporated and passed through furnace coils to create ketene gas. Precise temperature control during this phase is vital to prevent byproduct formation. Attomo Industries utilizes exotic and cladded metal fabrication to ensure these furnace coils withstand the intense thermal stress, ensuring long-term operational reliability and safety.