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Method for recovering phenol through 4-chloro-3,5-binitro benzotrifluoride wastewater acidification

A technology of dinitrotrifluorotoluene and waste water, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problem of high cost of waste water treatment, and achieve the advantages of extraction and purification, fast regeneration rate, and easy removal. Effect

Inactive Publication Date: 2018-06-08
JIANGSU ZHENFANG BIO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a method for acidifying 4-chloro-3,5-dinitrobenzotrifluoride wastewater to recover phenol, and to solve the problem of high wastewater treatment costs

Method used

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  • Method for recovering phenol through 4-chloro-3,5-binitro benzotrifluoride wastewater acidification
  • Method for recovering phenol through 4-chloro-3,5-binitro benzotrifluoride wastewater acidification
  • Method for recovering phenol through 4-chloro-3,5-binitro benzotrifluoride wastewater acidification

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Embodiment 1

[0043] The processing result of embodiment 1 is as shown in table 2:

[0044]

[0045]

[0046] Table 2

Embodiment 2

[0047] The processing result of embodiment 2 is as shown in table 3:

[0048] project

[0049] table 3

Embodiment 3

[0050] The processing result of embodiment 3 is as shown in table 4:

[0051] project

[0052] Table 4

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Abstract

The invention relates to a method for recovering phenol through 4-chloro-3,5-binitro benzotrifluoride wastewater acidification. The method comprises the following steps of S1, acidification; S2, filtering: mixed liquid in the step S1 is filtered by a plate frame, and solid is dried; S3, adsorption: resin is added into a filter; then, filter liquid in the step S2 is added into a filter at the speedrate of 1.0 to 2.0 ml / min for adsorption filtration; the filter liquid is transferred into a sewage treatment plant for biochemical treatment; S4, regeneration: alkali liquid is added into the resinin the step S3 for regenerating resin; regenerated liquid is obtained; S5, recovery: inorganic acid II is added into the regenerated liquid in the step S4 for regulating the PH to be 5 to 7; an organic solvent is added for extraction; the solvent is volatilized to obtain phenol. The method has the advantages that the cost is low; the regeneration efficiency is high; the purity is high.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for recovering phenol by acidifying 4-chloro-3,5-dinitrobenzotrifluoride wastewater. Background technique [0002] With the rapid development of my country's economy, the organic nitration industry has also risen rapidly. Nitrobenzene is an important fine chemical intermediate, but the nitration process inevitably produces a large amount of nitrification wastewater. In addition to waste acid, the wastewater includes nitration products and Substances such as nitrophenols have the characteristics of high toxicity and difficulty in biochemical treatment. The treatment of nitrification wastewater is still a difficult problem in wastewater treatment. [0003] The company's product 4-chloro-3,5-dinitrobenzotrifluoride is an intermediate product. After the nitrated material (referred to as nitrate) is separated into the mixed acid layer, the material needs to be was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/68C07C37/86C07C37/82C07C37/72C07C37/70C07C39/04C02F9/14C02F103/36
CPCC02F1/001C02F1/285C02F1/66C02F3/00C02F9/00C02F2103/36C02F2303/16C07C37/685C07C37/70C07C37/72C07C37/82C07C37/86C07C39/04
Inventor 卢根明
Owner JIANGSU ZHENFANG BIO CHEM CO LTD