| 摘要 |
The invention relates to a process for the homogeneous oxidation of methane-containing gas, which comprises feeding methane-containing gas, previously heated to 430-450°C, into at least three sequentially arranged oxidation reactors, with each of the reactors except the last being independently connected to waste-heat boilers and oxygen being fed to the reactors for oxidation of the methane-containing gas, wherein the temperature of the gas mixture is raised to 540-560°C, with subsequent rapid quench-cooling of the gas mixture to 440-450°C in the waste-heat boilers, where steam is formed which is fed to a rectifying column for the separation of final products, the reaction mixture passing from the last reactor into a separator, from which the liquid phase passes to the rectification stage, where rectified methanol, ethanol and formaldehyde are obtained, while the gas phase passes for purification by removal of SO2, CO and CO2, partial purging of the circulation system being carried out to remove inert gases, and after purification and purging the cycle is completed by topping-up the gas phase/circulating gas with initial methane-containing gas and again feeding the resultant gas to a reactor. The invention also relates to a plant for implementing the process. The invention makes it possible to raise efficiency, increase product yield and improve the ecological situation. |
