Ortho-aminophenol wastewater treatment and recycling method

A technology for o-aminophenol and wastewater treatment, applied in water/sewage treatment, chemical instruments and methods, special compound water treatment, etc. problem, to achieve the effect of continuous production process, low production cost and high removal rate
CN107129078AInactive Publication Date: 2017-09-05NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND
Publication Date
2017-09-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an ortho-aminophenol wastewater treatment and recycling method and relates to a wastewater treatment method with at least one chemical treatment step. The method comprises the following steps: 1, performing wastewater pretreatment; 2, performing resin activation; 3, performing resin adsorption; 4, performing advanced treatment; 5, performing resin regeneration; and 6, recycling the ortho-aminophenol. According to the ortho-aminophenol wastewater treatment and recycling method disclosed by the invention, multiple technologies such as resin adsorption, microelectrolysis, a Fenton process and an activated carbon adsorption technology are combined, so that the ortho-aminophenol wastewater is treated, the ortho-aminophenol and chroma in the wastewater can be efficiently removed, 3.723g of the ortho-aminophenol can be recovered from per liter of wastewater at most, and the recycling purity is higher than 92%. The method has the advantages of simplicity in operation, continuous production process, less waste residues, zero waste gas, zero wastewater and the like, is clean and environmental-friendly and can be widely applied to treatment of the ortho-aminophenol. The method disclosed by the invention belongs to the technical field of wastewater treatment.
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Description

technical field

[0001] The invention relates to a wastewater treatment method with at least one chemical treatment step, in particular to a treatment and resource recovery method of o-aminophenol wastewater. Background technique

[0002] 2-Amino-1-hydroxybenzene is an important chemical intermediate widely used in many production fields such as dyes, medicines, and plastics. With the rapid development of modern industry, the demand for o-aminophenol as an intermediate is increasing day by day, but the production technology of o-aminophenol in China is still relatively backward, and the wastewater from o-aminophenol process has a large amount of water, high toxicity and difficult treatment Great features. If this type of wastewater is not properly treated, it will cause serious pollution to the environment, and at the same time the o-aminophenol in the wastewater cannot be recovered and will also cause economic losses.

[0003] At present, there are relatively few treatment...

Claims

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