A kind of fusel oil desulfurization and deodorization method of coal-to-methanol

Abstract

The invention belongs to the filed of chemical production, and particularly relates to a method for desulfurizing and deodorizing fusel oil from coal-based methanol preparation. In a coal-based methanol preparation process, fusel oil after methanol distillation contains more than 40 organic compounds such as methanol and the like and minute quantities of methanthiol, ethanethiol, hydrogen sulfide and the like, and these sulfides have bad and pungent odor. The odorous fusel oil is usually treated as hazardous waste, and can cause environmental pollution and waste of resources. According to the invention, the method for desulfurizing and deodorizing fusel oil from coal-based methanol preparation is simple, convenient to operate and low in production cost; and through the fusel oil desulfurizing and deodorizing process, no waste liquid, waste residue or waste gas is discharged, no secondary pollution is caused, and the waste is comprehensively utilized and changed into valuable substances. Thus, the method is suitable for industrial practical application.

Description

technical field [0001] The invention belongs to the field of chemical production, and in particular relates to a method for desulfurizing and deodorizing fusel oil for coal-to-methanol. Background technique [0002] In the coal-to-methanol process, the fusel oil remaining after methanol distillation is mainly composed of methanol, and also contains ethanol, propanol, isopropanol, butanol, isobutanol, 2-butanol, pentanol, and isoamyl alcohol , 2-pentanol, 3-methyl-2-butanol, 2-methyl-1-butanol, hexanol, 2-hexanol, 3-hexanol, heptanol, 2-heptanol, 3-heptanol Alcohol, 2-methyl-1-hexanol, 2-ethyl-1-pentanol, 2-methyl-3-hexanol, decane, undecane, dodecane, tridecane, tetradecane , pentadecane, hexadecane, heptadecane, octadecane, nonadecane, eicosane, hexacane and other 40 kinds of compounds, also contains a very small amount of methyl mercaptan, ethyl mercaptan, hydrogen sulfide etc. These sulfides have an unpleasant and pungent smell of rotten duck eggs, but because their con...

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Problems solved by technology

[0002] In the coal-to-methanol process, the fusel oil remaining after methanol distillation is mainly composed of methanol, and also contains ethanol, propanol, isopropanol, butanol, isobutanol, 2-butanol, pentanol, and isoamyl alcohol , 2-pentanol, 3-methyl-2-butanol, 2-methyl-1-butanol, hexanol, 2-hexanol, 3-hexanol, heptanol, 2-heptanol, 3-heptanol Alcohol, 2-methyl-1-hexanol, 2-ethyl-1-pentanol, 2-methyl-3-hexanol, decane, undecane, dodecane, tridecane, tetradecane , pentadecane, hexadecane, heptadecane, octadecane, nonadecane, eicosane, hexacane and other 40 kinds of compounds, also contains a very small amount of methyl mercaptan, ethyl mercaptan, hydrogen sulfide etc. These sulfides have an unpleasant and pungent smell of rotten duck eggs, but due to their low content and high processing costs, it is difficult to completely remove this peculiar smell

This smelly fusel oil is often treated as hazardous waste, which not only causes environmental pollution, but also makes the resources not be used better

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