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Method for solving secondary pollution of cyclohexanone saponification waste alkali liquor

A secondary pollution, cyclohexanone technology, applied in chemical instruments and methods, preparation of organic compounds, inorganic chemistry and other directions, can solve secondary pollution, equipment corrosion and other problems, achieve good economic benefits, solve equipment corrosion, process cleaning effect

Inactive Publication Date: 2017-07-21
赵琪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a method for solving the secondary pollution of cyclohexanone saponification waste lye, and its purpose is to ban the incineration method and thoroughly solve the impact of acid waste water and malodorous gas on the environment in the process of chemical treatment of cyclohexanone saponification waste lye. The secondary pollution generated, and solve the problem of equipment corrosion; while solving the secondary pollution of cyclohexanone saponification waste lye, obtain industrial anhydrous sodium sulfate and methyl carboxylate

Method used

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  • Method for solving secondary pollution of cyclohexanone saponification waste alkali liquor

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1), take 1000 grams of waste lye with a solid content of 35%wt, enter the rotary evaporator, and when the solid content of the waste lye is 80%wt, stop evaporation to obtain 440 grams of evaporated liquid and 560 grams of condensed water grams; after testing, the condensed water meets the water standard for cyclohexanone production. The obtained 440 grams of evaporated liquid is put into a desiccator with condensation receiver, and after drying, 360 grams of solids and 80 grams of condensed water are obtained, which can be reused in the production of cyclohexanone after testing.

[0027] (2) Put 360 grams of solid matter into a three-necked flask with stirring and condensing reflux, add 90 grams of industrial methanol, stir and mix, then slowly add 140 grams of sulfuric acid (100% by mass fraction), and the flask appears When the suspension is uniform, keep the temperature of the material at 110°C for reflux reaction. After two hours, the acid value of the reaction mat...

Embodiment 2

[0029] (1), get 1,000 kilograms of waste lye with a solid content of 35%wt, pump it into a single-effect evaporator with a condensing device, evaporate condensed water into the collection tank, and when the solid content of the waste lye reaches 70%wt, Stop the evaporation to obtain 500 kg of evaporated liquid and 500 kg of condensed water; after testing, the condensed water can be reused for the production of cyclohexanone.

[0030] The obtained 500 kg of evaporated liquid is entered into a drum chip dryer with a condensing device for drying to obtain 350 kg of waste lye flake solids and 150 kg of condensed water. The dried condensed water meets the water standard for cyclohexanone production.

[0031] (2) Put 350 kg of solid matter into a reaction kettle with a stirring and condensing reflux device, add 14 kg of industrial methanol, stir and mix, then slowly add 170 kg of sulfuric acid (100% by mass fraction), the contents of the kettle When it is a uniform suspension, keep ...

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Abstract

The invention provides a method for solving secondary pollution of a cyclohexanone saponification waste alkali liquor and aims to replace a burning method, thoroughly solve secondary environmental pollution produced by acidic wastewater and malodorous gas in the process of treating cyclohexanone saponification waste alkali liquor by adopting a chemical treatment method and solve the problem of equipment corrosion. Industrial anhydrous sodium sulfate and methyl carboxylate are obtained while the secondary pollution of cyclohexanone saponification waste alkali liquor is solved. The treatment process is zero in discharge, the process is clean and easy to implement, and the method has remarkable social and environmental benefits.

Description

technical field [0001] The invention relates to environmental protection technology, in particular to a method for solving the secondary pollution of cyclohexanone saponification waste lye. Background technique [0002] Cyclohexanone is mainly used in the production of caprolactam, adipic acid, and various solvents, and has a large market demand. For every ton of cyclohexanone produced by the cyclohexane liquid phase oxidation method, 0.8 tons of saponification waste lye will be produced, with a density of 1125Kg / m3 and complex components, mainly sodium hydroxide, sodium carbonate and sodium salt of organic acids , the COD value is as high as 600 g / L, and the conventional water treatment process cannot solve the environmental pollution caused by saponification waste lye. So far, the ways to deal with the pollution of saponification waste lye are incineration and chemical treatment, both of which have secondary pollution in the process of saponification waste lye. [0003] ...

Claims

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Application Information

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IPC IPC(8): C02F1/04C01D5/00C01D5/02C07C67/08C07C69/003C02F103/34
CPCC01D5/00C01D5/02C02F1/04C02F2103/34C07C67/08C07C69/003
Inventor 赵琪
Owner 赵琪
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