Method for treating waste water of H-acid production

A technology for the production of waste water and treatment methods, applied in the directions of heating water/sewage treatment, neutralized water/sewage treatment, ion exchange water/sewage treatment, etc. Governance problems and other problems, to achieve the effect of being conducive to comprehensive utilization, realizing waste resource utilization and utilization, and easy desorption and regeneration
CN101104533AInactive Publication Date: 2008-01-16NANKAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANKAI UNIV
Publication Date
2008-01-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention is a treatment method for naphthalene dye intermediate H-acid production wastewater. After H-acid pretreatment wastewater is preprocessed, organic compounds such as, 1-amido-8- naphthol-3, 6-disulfonic acid (H-acid) and intermediate products, are adsorbed on the resin through alkalescence macroporous adsorption resin; the adsorbed water is added with lye for desorption regeneration and the regenerated liquid will be back into the previous production process for application. The CODcr of the treated wastewater can be effectively reduced to reach the national emission standards; the reclaimed H-acid sodium salt can be used. The resin can be desorbed and regenerated through lye for repeated use. The desorbed liquid is distilled and reclaimed, and the distilled effluent can be used repeatedly. The H-acid sodium salt and the intermediate products reclaimed through the invention can be used as raw materials for the original production process; therefore, the invention not only helps treating wastewater but also realizes waste resource utilization.
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Description

technical field

[0001] The invention relates to the treatment of production waste water discharged during the production process of an important dye intermediate H-acid (1-amino-8-naphthol-3,6-disulfonic acid). Specifically, it is the recycling of 1-amino-8-naphthol-3,6-disulfonic acid (H-acid) and its intermediate products and the recycling of H-acid sodium salt in wastewater, so as to realize the discharge of wastewater up to standard, Finally, the comprehensive treatment and resource utilization of 1-amino-8-naphthol-3,6-disulfonic acid (H-acid) production wastewater will be realized. Background technique

[0002] H-acid, also known as 1-amino-8-naphthol-3,6-disulfonic acid, colorless crystal, is an important dye intermediate, mainly used in the production of acidic, reactive dyes and azo dyes, also Can be used in the pharmaceutical industry. Slightly soluble in cold water, easily soluble in hot water, soluble in alkaline solutions such as soda ash and caustic soda. Su...

Claims

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