Production technology for preparing methanol by continuous oxidation of methane

Abstract

The invention discloses a production technology for preparing methanol by continuous oxidation of methane, comprising the following steps: methane gas and solvent dissolved with catalyst are respectively preheated to the reaction temperature of 160-220 DEG C and are added into a packed bubbling tower from the entrance of the bottom of the packed bubbling tower, and the two flow upward and pass through the packed bubbling tower, and the retention time is 10-40min; the reaction pressure is 1-6MPa, liquid phase product of methyl hydrogen sulphate is generated by reaction, and methanol is obtained by rectification and hydrolysis; and the reacted tail gas is discharged from the exit of the top of the packed bubbling tower. The invention has the advantages of simple technology, low running cost, selection of suitable reactor and capability of continuous production, belonging to the field of methanol production.

Description

technical field [0001] The invention relates to a production process for preparing methanol by direct oxidation of methane, specifically a production process for preparing methanol by continuously oxidizing methane in liquid phase by using a packed bubble column as a reactor. Background technique [0002] Methane is an important chemical raw material, but due to the unusually stable chemical structure of methane, the traditional methane-to-methanol process requires pyrolysis of methane and water vapor under high temperature and high pressure, or partial decomposing of methane and pure oxygen under high temperature and high pressure conditions. Oxidation to produce synthesis gas (CO+H 2 ), and then synthesize methanol under high pressure and high temperature conditions. Although this process is mature, the investment is huge. Only the investment in methane pyrolysis or partial oxidation to synthesis gas accounts for more than 70% of the total investment, and the energy consu...

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Problems solved by technology

However, these studies are all batch reactions. The reaction pressure is determined by the initial pressure of methane fed into the autoclave and the reaction temperature. Not only is the pressure high, but it cannot be adjusted, and the reaction rate also changes with time. Most of the experimental results remain in the study of the reaction mechanism. On the one hand, it is impossible to provide design parameters and design basis for industrial production, and there is still a certain distance from industrial application and design

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