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Process of treating and reusing effluent from 1-amino-8-naphthol-3, 6-disulfonic acid production

A technology for producing wastewater and disulfonic acid, which is applied in separation methods, water/sewage treatment, sustainable biological treatment, etc., can solve problems such as effective treatment of production wastewater, technologies that have not been reported in literature, and environmental pollution. Comprehensive utilization, easy desorption and regeneration, and high adsorption efficiency

Inactive Publication Date: 2007-11-07
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] (4) High toxicity. H acid belongs to polycyclic aromatic hydrocarbons, which has strong biological toxicity. If the waste water is discharged directly without treatment, it will seriously pollute the environment and cause great harm to the human body.
[0014] Because the dye intermediate 1-amino-8-naphthol-3,6-disulfonic acid wastewater has too much salt and CODcr, the effective treatment of its production wastewater is still a big problem.
Domestic and foreign document retrieval shows that the technology of the present invention has never been seen in document reports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Pack 30mL (about 22g) of macroporous weakly basic resin ND900 resin into a glass column (Φ20×250mm) with a heat preservation jacket. Take 55mL of yellow production wastewater, distill 5mL, cool to room temperature, and adjust the pH value to 3. The CODcr of the upper column liquid is 16700mg / L. At room temperature (25°C) it passes through the resin column at a flow rate of 10mL / h. The adsorbed water is colorless, and the CODcr is reduced to 260mg / L. The water is neutralized and oxidized by aerobic biological contact. After treatment, CODcr is reduced to 70mg / L, which can reach the national secondary emission standard.

[0028] After adsorption, the macroporous weakly basic resin ND900 resin is desorbed and regenerated with alkali at a temperature of 92±2°C and 40 mL of hot water, and the flow rate is 10 mL / h. The resin regenerated by desorption is reused. The desorption rate of 1-amino-8-naphthol-3,6-disulfonic acid was 98%. After the desorption solution (40mL) is di...

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PUM

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Abstract

The present invention is process of treating effluent from the production of dye intermediate 1-amino-8-naphthol-3, 6-disulfonic acid and recovering resource. The process includes: distilling pre-treatment of the effluent; adsorbing 1-amino-8-naphthol-3, 6-disulfonic acid, intermediate product and other organic matter from the effluent with macroporous weak alkaline resin ND900 in serially connected three column; neutralizing the adsorbed columns treated water with alkali and decompression distilling; and final aerobic biochemical treatment for the water to reach exhaust standard. The process can reduce CODcr in the effluent from 16,700 mg / l to below 100 mg / l. The used resin may be desorbed with NaOH+H2O desorbing agent for reuse, and the desorbed liquid may be distilled for recovery.

Description

technical field [0001] The invention relates to the treatment of production waste water discharged during the production process of dye intermediate 1-amino-8-naphthol-3,6-disulfonic acid. Specifically, it is the recycling of 1-amino-8-naphthol-3,6-disulfonic acid and its intermediate products and the recycling of sodium sulfate in wastewater, so as to achieve the discharge of wastewater up to standard, and finally realize the realization of 1-amino-8- Treatment of wastewater from naphthol-3,6-disulfonic acid production and its recycling. Background technique [0002] 1-Amino-8-naphthol-3,6-disulfonic acid is an important dye intermediate, mainly used in the production of acid, reactive dyes and azo dyes, and can also 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. Sulfuric acid (or hydrochloric acid) is added in the acid analysis process to precipitate mon...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/04C02F1/58C02F1/42C02F1/66C02F1/28C02F3/02B01D15/42C01D5/16C07C309/50C02F101/38
CPCY02W10/10
Inventor 肖羽堂高冠道赵美姿
Owner NANKAI UNIV
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