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Method of recycling cyclohexanone waste lye

A technology of waste lye and cyclohexanone, applied in chemical instruments and methods, natural water treatment, neutralized water/sewage treatment, etc., can solve environmental secondary pollution and other problems, achieve radical cure of secondary pollution, and significantly improve social environment Benefits and low energy consumption

Inactive Publication Date: 2009-10-21
赵志军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual semi-industrial production, the acidified sewage and sour smell produced by the acid neutralization process have caused some secondary pollution to the environment.

Method used

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  • Method of recycling cyclohexanone waste lye

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Embodiment Construction

[0014] The waste caustic lye basic substance component and weight percentage that the inventive method radically cures are:

[0015] Inorganic matter: sodium carbonate (Na 2 CO 3 ) about 7%

[0016] Sodium hydroxide (NaOH) about 8%

[0017] Organic matter: about 35% organic acid alcohol ketone ester

[0018] Water about 50%

[0019] Below in conjunction with technological process block diagram, briefly describe the implementation process of the inventive method:

[0020] (1) Acid neutralization to extract acid oil, anhydrous sodium sulfate (Na 2 SO 4 ) and sodium sulfate containing crystal water (Na 2 SO 4 10H 2 O); and simultaneously treat the acidified sewage generated during the acid neutralization process.

[0021] (1) Acid neutralization to extract acid oil, anhydrous sodium sulfate (Na 2 SO 4 ) and sodium sulfate containing crystal water (Na 2 SO 4 10H 2 O):

[0022] Add industrial sulfuric acid or waste sulfuric acid into the waste caustic so tha...

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Abstract

The invention relates to a method of recycling cyclohexanone waste lye. The method comprises the following steps: 1) acid is used for neutralizing waste lye to extract acid oil, anhydrous sodium sulphate and sodium sulphate with water; acidulated sewage is processed; 2) acidic sour gas is processed; 3) anhydrous sodium sulphate and sodium sulphate with water are used for cogeneration of sodium sulfide; 4) acid oil is used for cogeneration of monocarboxylie acid, adipate and fuel oil. The technical route is reasonable and has the advantages that waste lye is used for processing the sewage acidulated by sodium sulfate solution immediately after neutralization with acid to eliminate acidic sour gas, so as to radically treat secondary pollution of acid neutralization method, achieve zero emission and improve environmental benefits obviously; sodium sulfide, monocarboxylie acid, adipate, clean fuel oil and other chemical products with high added-value are obtained, so that economic benefits are obvious; The method recycles waste resource, has low energy consumption and simple technique, which is applicable to scale treatment of cyclohexanone waste lye as well as industrial production of resource recovery.

Description

technical field [0001] The invention relates to chemical wastewater treatment technology, in particular to a method for recycling waste lye of cyclohexanone. Background technique [0002] Cyclohexanone is an important chemical raw material for the production of caprolactam, the manufacture of resins, and the synthesis of pesticides and pharmaceuticals. The industrial production of cyclohexanone mostly adopts the cyclohexane liquid phase oxidation method. The high-concentration waste lye discharged during the production process has a COD value as high as 5×10 5 mg / L. At present, the common methods for processing such waste lye mainly adopt incineration or acid neutralization. The former can eliminate pollution more thoroughly, but the investment in incineration equipment is large, the treatment cost is high, and it also consumes other precious energy; During the treatment process, a large amount of secondary pollution such as acidified sewage and sour odor will be generat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/66C02F103/36C01B17/22C07C51/44C07C53/124C07C53/126C07C55/14
Inventor 赵志军
Owner 赵志军
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