Maleic anhydride
| 원료 | N-Butane; Air | ||||||||||||
| 생산물 | Maleic anhydride | ||||||||||||
| 적용 | To produce maleic anhydride (MA) from normal butane and air via gas phase catalytic oxidation. | ||||||||||||
| 설명 | Description: Butane is the preferred feedstock for MA because of environmental and economic considerations. Normal butane and air are fed to a multitube fixed bed reactor (1) that is cooled with molten salt. MA is produced in the presence of a proprietary modified vanadium oxide catalyst. The exiting gas stream is cooled and crude MA is nearly quantitatively absorbed in an absorber (2) using a readily available solvent. Crude MA, sufficiently pure for many applications, is removed from the solvent in a stripper (3). The crude MA can be further purified in a batch distillation column (4). A portion of the recycled solvent is sent to a proprietary solvent purification system (5) to minimize buildup of high-boiling impurities. The continuous, patented recovery system has several advantages over aqueous recovery: a) drastically lower aqueous waste discharges: b) lower energy consumption; c) higher onstream time because of the absence of insoluble fumaric acid that can foul equipment; and d) higher recovery of crude maleic. After removal of MA, the reactor offgas, containing significant fuel value, is sent to an incinerator or disposal equipment. Byproduct steam is produced in the reactor from the exothermic reaction and in the gas cooler by cooling the offgas. Additional steam can be generated from burning the offgas. |
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| Properties in KDB |
Component Names and Formula
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