Production wastewater treatment process of intermediate for synthesizing 2-nitroso-1-naphthol-5-sulfoacid by 1-naphthol-5-sulfoacid

Abstract

The invention relates to a chemical production wastewater treatment process and in particular to a production wastewater treatment process of an intermediate for synthesizing 2-nitroso-1-naphthol-5-sulfoacid by 1-naphthol-5-sulfoacid. The process comprises the following steps: firstly adding a Fenton reagent to production wastewater of the intermediate for synthesizing the 2-nitroso-1-naphthol-5-sulfoacid by the 1-naphthol-5-sulfoacid and performing an oxidation reaction, and adding Ca(OH)2 for hierarchically filtering, separating supernatant liquid to obtain filtrate, and adding sodium hypochlorite to the filtrate, finishing the treatment. Because the effective connection and the synergistic effect between treatment process units, the treatment process is capable of enabling the removal efficiency of wastewater CODCr to be up to 96%, a CODCr value of the treated water is 800 mg / L. In addition, chemical reagents related in the treatment process are common chemical products, and easy topurchase, and the price is cheap.

Description

technical field [0001] The invention relates to a chemical production wastewater treatment process, in particular to a production wastewater treatment process for synthesizing 2-nitroso-1-naphthol-5-sulfonic acid intermediate from 1-naphthol-5-sulfonic acid. Background technique [0002] The production wastewater of 2-nitroso-1-naphthol-5-sulfonic acid intermediate synthesized from 1-naphthol-5-sulfonic acid has low pH, high concentration, high chroma, refractory degradation, high toxicity, and Disadvantages such as poor biochemical properties. At present, there is no relevant report on the wastewater treatment process for the production of 2-nitroso-1-naphthol-5-sulfonic acid intermediate in China. Ma Dongmei et al. reported Fe 2+ Efficiency of Catalytic Hydrogen Peroxide Oxidation Treatment of H Acid (1-Amino-8-Naphthol-3,6-Disulfonic Acid) Crystallization Waste Mother Liquor Extraction Raffinate. in H 2 o 2 The dosage is 140mmoL / Ln(H 2 o 2 ):n(Fe 2+ ) is 15:1, whe...

AI Technical Summary

Problems solved by technology

However, such wastewater contains a large amount of lost dye molecules and production intermediates before extraction treatment, COD Cr The value is usually between tens of thousands to hundreds of thousands of milligrams per liter, and the treatment efficiency of only one method through Fenton's reagent is very limited

Extraction is an effective method to deal with high-concentration and refractory organic matter, but the extraction agent needs to be regenerated in this treatment method, which increases the treatment cost