Regeneration method of alkylated waste sulfuric acid

Abstract

The invention relates to a regeneration method of waste sulfuric acid, in particular to a regeneration method of alkylated waste sulfuric acid. Waste sulfuric acid is in contact with hydrogen peroxide under redox conditions; organic matters or tiny carbon granules in the waste sulfuric acid react with hydrogen peroxide and are translated into carbon dioxide, nitrogen and water; and steam-stripping removing is performed, so as to obtain regenerated sulfuric acid. The regeneration method of alkylated waste sulfuric acid has the advantages that the required reaction temperature is comparatively low, the operation is simple, and the maintenance cost of a device is low.

Description

technical field [0001] The invention relates to a regeneration method of waste sulfuric acid, in particular to a regeneration method of alkylation waste sulfuric acid. Background technique [0002] In the process of petroleum refining industry, concentrated sulfuric acid is often used as a catalyst for the alkylation reaction of low-carbon hydrocarbon molecules. More specifically, C2-C5 olefins and isobutane undergo an alkylation reaction under the catalysis of 98% concentrated sulfuric acid, and the resulting alkylated oil is sulfur-free, aromatic-free, and has a high octane number, which is a high-quality high-octane oil Gasoline blending components. During the alkylation reaction, the moisture, sulfur and nitrogen compounds, and side reaction products in the raw materials continuously enter the acid phase, so that the concentration of sulfuric acid gradually decreases, and when the concentration is lower than 90%, it is discharged as waste acid. [0003] The discharged ...

AI Technical Summary

Problems solved by technology

[0003] The discharged waste concentrated sulfuric acid is black-red in color, unstable in nature, emits a special smell, is difficult to handle, and brings serious pollution to the ecological environment