A kind of treatment method of piperonal production wastewater

Abstract

The invention relates to the technical field of industrial wastewater treatment, and specifically discloses a treatment method for piperonal production wastewater. The method for treating the piperonal production wastewater includes: adding 1,2-methylenedioxybenzene to the piperonal production wastewater, mixing uniformly, performing distillation, collecting fractions, and separating liquids to obtain recovered materials; cooling the remaining mother liquor from the distillation , After adjusting the pH to weak acidity, adding transition metal oxides, performing high-pressure pulse treatment, filtering, and treating the treated water through the sewage treatment system and discharging. The method for treating wastewater from piperonal production provided by the invention has the advantages of simple process operation and low energy consumption, and solves the problem that the reaction raw materials and reaction products in the wastewater cannot be recovered by the traditional treatment process, and the treated wastewater can reach the level of "Chemical Synthesis Pharmaceutical Industry" "Water Pollutant Discharge Standard" discharge standard, will not cause secondary pollution, realize the comprehensive treatment and resource utilization of wastewater, has high economic and environmental benefits, and has high promotion value.

Description

technical field

[0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a method for treating wastewater from piperonal production. Background technique

[0002] Piperonal, chemical name is 3,4-methylenedioxybenzaldehyde, molecular formula is C 8 H 6 O 3 , white to light yellow crystals, soluble in general organic solvents, insoluble in water and glycerol, melting point is 35~37℃, boiling point is 261~263℃. Piperonal not only has a sweet heliotrope aroma, but also has a light and slightly sweet aroma of cherry and sunflower, and also has a weak spicy aroma, which lasts for a long time. It is one of the most important synthetic spices in the world and is widely used in various Fragrance blending.

[0003] Piperonal is prepared from 1,2-methylenedioxybenzene (piperonyl ring) through acidification and catalytic oxidation. During the catalytic oxidation process, wastewater containing benzene ring substances will be produced. ...