A kind of treatment method of diketene production waste water

A technology for diketene and waste water production, which is applied in the treatment of biological organic parts, fertilizers made from biological waste, radiation treatment, etc., can solve the problems of waste of residual resources, environmental pollution, etc. Easy-to-use effects

Active Publication Date: 2022-05-13
NINGBO WANGLONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] If it is directly disposed of by landfill or incineration, it will cause serious pollution to the environment and waste resources in the residue

Method used

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  • A kind of treatment method of diketene production waste water
  • A kind of treatment method of diketene production waste water

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1: a kind of treatment method of diketene production waste water, comprises the following steps:

[0045] (1) Hydrolysis

[0046] Mix the rectification residue and waste liquid produced by the acetic acid cracking method to prepare diketene as wastewater to be treated; add water, disodium EDTA, low molecular weight sodium polyacrylate and sodium dodecylsulfonate to the wastewater to be treated, and stir at room temperature reaction, collect the CO produced by the reaction 2 , until the reaction is free of CO 2 produce;

[0047] On a mass basis, the ratio of waste water to be treated, water, disodium EDTA, low molecular weight sodium polyacrylate and sodium dodecylsulfonate is 1:2.0:0.02:0.25:0.05;

[0048] (2) Separation of acetone

[0049] Distill the slurry obtained in step (1) at a distillation temperature of 45° C., and collect the distilled gas into an acetone receiving tank after condensation;

[0050] (3) Dehydration

[0051] Concentrate the slur...

Embodiment 2

[0058] Embodiment 2: a kind of treatment method of diketene production waste water, comprises the following steps:

[0059] (1) Hydrolysis

[0060] Mix the rectification residue and waste liquid produced by the acetic acid cracking method to prepare diketene as wastewater to be treated; add water, disodium EDTA, low molecular weight sodium polyacrylate and sodium dodecylsulfonate to the wastewater to be treated, and stir at room temperature reaction, collect the CO produced by the reaction 2 , until the reaction is free of CO 2 produce;

[0061] On a mass basis, the ratio of waste water to be treated, water, disodium EDTA, low molecular weight sodium polyacrylate and sodium dodecylsulfonate is 1:1.5:0.01:0.24:0.04;

[0062] (2) Separation of acetone

[0063] Distill the slurry obtained in step (1) at a distillation temperature of 42° C., and collect the distilled gas into an acetone receiving tank after condensation;

[0064] (3) Dehydration

[0065] Concentrate the slur...

Embodiment 3

[0072] Embodiment 3: a kind of treatment method of diketene production waste water, comprises the following steps:

[0073] (1) Hydrolysis

[0074] Mix the rectification residue and waste liquid produced by the acetic acid cracking method to prepare diketene as wastewater to be treated; add water, disodium EDTA, low molecular weight sodium polyacrylate and sodium dodecylsulfonate to the wastewater to be treated, and stir at room temperature reaction, collect the CO produced by the reaction 2 , until the reaction is free of CO 2 produce;

[0075] On a mass basis, the ratio of waste water to be treated, water, disodium EDTA, low molecular weight sodium polyacrylate and sodium dodecylsulfonate is 1:2.5:0.02:0.28:0.06;

[0076] (2) Separation of acetone

[0077] Distill the slurry obtained in step (1) at a distillation temperature of 48° C., and collect the distilled gas into an acetone receiving tank after condensation;

[0078] (3) Dehydration

[0079] Concentrate the slur...

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Abstract

The application discloses a treatment method for diketene production wastewater, which obtains CO by hydrolysis 2 , acetone, water, low-molecular-weight sodium polyacrylate / acetic acid coating, etc., to collect CO by the escape method 2 and distillation to collect acetone, concentration and azeotropic dehydration, and then destroy the low-molecular-weight sodium polyacrylate / acetic acid coating and separate the acetic acid. The remaining low-molecular-weight sodium polyacrylate, diketene high polymer and dodecylbenzene Sodium sulfonate has a high concentration of organic matter, so it is easy to ferment. The fermented gas is used as a heat source, and the solid residue is used as a fertilizer. The waste liquid is comprehensively treated, and various active components are recovered to make full use of resources and reduce environmental pollution.

Description

technical field [0001] The invention relates to a treatment method for diketene production wastewater. Background technique [0002] Diketene, also known as diketene, is a colorless or light yellow liquid with a strong pungent odor. Because diketene contains two double bonds in its structure and is highly unsaturated, it has high chemical activity and excellent reaction in organic synthesis. It is an important intermediate and acetylating agent in organic synthesis, and is widely used in medicine, pesticides, dyes, food and other industries. [0003] The acetic acid cracking method is a commonly used method to produce diketene. The production process of the acetic acid cracking method is as follows: acetic acid is heated and vaporized, mixed with a phosphate aqueous solution catalyst and entered into the preheating section for preheating, and then enters the cracking furnace Cracking and dehydration produces ketene and water, and the ketene after cooling and separation is s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C27/26C07C45/42C07C45/82C07C49/08C07C51/087C07C51/00C07C51/42C07C51/44C07C51/50C07C51/43C07C51/46C07C53/08C05F15/00C05F17/30
CPCC07C45/42C07C45/82C07C51/087C07C51/00C07C51/42C07C51/44C07C51/50C07C51/43C07C51/46C05F5/006C07C49/08C07C53/08Y02W30/40
Inventor 王国军王益挺施红杰施海洪钟永波沈海军
Owner NINGBO WANGLONG TECH
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