A heat-sensitive material protection agent, thiourea dioxide mother liquor evaporation treatment method and system

Abstract

The invention discloses a heat-sensitive material protectant and a thiourea dioxide mother liquor evaporation treatment method and system. The heat-sensitive material protectant is prepared from the following components in parts by weight: 0.2-0.5 parts of hydroxyethanediphosphonic acid, 0.1-0.3 parts of amino trimethylene phosphonic acid and 0.03-0.05 parts of hexamethylenediamine tetramethylene phosphonic acid. The heat-sensitive material protectant is added into a thiourea dioxide mother liquor, so that a stable state of thiourea dioxide can be kept at a high temperature, and the thiourea dioxide mother liquor evaporation treatment and the thiourea dioxide crystal recovery are realized; the evaporation treatment method effectively avoids decomposition of thiourea dioxide in the mother liquor by utilizing a protective effect of the heat-sensitive material protectant; and the dual-effect evaporation is adopted, so that the problem of difficulty in treating the thiourea dioxide mother liquor is solved, the environmental pollution caused by mother liquor wastewater discharge is alleviated, useful substances in the mother liquor are recovered, the treatment cost is reduced, the economic value is high, and good economic and environmental benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of thiourea dioxide wastewater treatment, and specifically relates to a heat-sensitive material protective agent, and also relates to a method and system for thiourea dioxide mother liquor evaporation treatment. Background technique [0002] Thiourea dioxide, molecular formula CH 4 N 2 o 2 S, an alternative product of hydrosulfite, has the characteristics of strong reducibility, good thermal stability, good safety performance, and convenient storage and transportation. Thiourea dioxide is an important intermediate of nitrogen compounds in organic and inorganic chemical industry. It can be used as reducing agent, bleaching and decolorizing agent, plastic stabilizer, organic synthesis antioxidant and effector of photosensitive materials. It has been used in printing and dyeing, papermaking and other chemical industries. Widely used, coupled with its low cost and high technological content, it is more and mo...

AI Technical Summary

Problems solved by technology

At present, since the annual output of thiourea dioxide produced by similar product manufacturers generally does not exceed 2,000 tons, the production scale is small, so the mother liquor wastewater generated in the production process of thiourea dioxide is generally treated by biochemical methods, which is costly and not suitable for popularization and application.

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