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Treatment process of diketene distillation residues

A technology of diketene refining and processing technology, applied in the chemical industry, can solve the problems of low extraction utilization rate, incomplete decomposition, easy to cause pollution, etc., and achieve the effects of long fermentation time, improved efficiency and high utilization rate

Inactive Publication Date: 2014-09-10
NINGBO WANGLONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] An object of the present invention is to provide a process for the treatment of diketene rectification residues in order to solve the problems of low extraction utilization rate, incomplete decomposition, and easy pollution in the above-mentioned prior art.

Method used

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  • Treatment process of diketene distillation residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A. Diketene rectification residue and waste liquid are mixed according to the ratio of 1:1.5, and fly ash and water are added to the mixture. According to the mass ratio, the ratio of mixture to fly ash and water is 1:1:3. After mixing, stir for 25 minutes , forming a slurry;

[0043] B. Put the mixed slurry into the distillation tank, and under the action of 20Hz ultrasonic waves, heat it to 35-40°C under the condition of 0.12MPa for distillation. The distilled gas passes through the pipeline and condensing device and is stored in the receiving tank , the pipeline 1 is a 3-fold elbow, the heating and purification filter 2 is 4, and the temperature of the heating and purification filter 2 is 57° C. during work; the fly ash in the heating and purification filter 2 can be recovered after working Add in step A and mix with the mixture; the heating and purification filter sheet 2 includes a shell 5 with a through hole, the fly ash wrapped in non-woven fabric is the fly ash ...

Embodiment 2

[0049] Ultrasonic wave is not used during distillation in step B, all the other are the same as embodiment 1, the acetone purity that reclaims reaches 98.9%, is that efficiency is obviously lower than embodiment 1 about 30%.

Embodiment 3

[0051] Purify the filter disk and ultrasonic wave without heating, the rest is the same as in Example 1, and the purity of recovered acetone is lower, reaching 95%.

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Abstract

The invention relates to the field of chemical engineering, and provides a treatment process of diketene distillation residues, and the treatment process is used for solving the problems in waste liquids of the diketene distillation residues in the prior art that the extraction rate of acetone is low, the acetone purity is low, the whole process is long in time and low in efficiency, and the discharged liquid residues and the like after the treatment are not thoroughly treated. According to the method provided by the invention, the fermentation treatment is carried out after the reduced pressure distillation is carried out; hazardous substances are decomposed by utilizing biological bacteria, so that the method is simple in process, high in production efficiency and thorough in treatment of wastewater and waste residues, wherein marsh gas during the production can be used for heating a distillation retort and can also be used for providing heat energy or power for other process procedures in the production. Thus, the energy recycling is realized, i.e., the energy conservation and the environment friendliness are realized. As a result, the treatment process provided by the invention is suitable for popularization applications.

Description

technical field [0001] The invention relates to the field of chemical industry, and relates to a process for treating diketene distillation residue. Background technique [0002] Diketene inevitably produces residue and waste water in the production process. Generally speaking, diketene reacts with acetic acid to generate acetic anhydride, acetone, carbon dioxide and other substances, and acetic anhydride reacts with water to generate acetic acid and unprocessable solid residue. In the prior art This kind of solid residue is generally used as solid fuel, but the use of chemical raw materials as fuel inevitably brings environmental pollution; the traditional process often uses hydrolysis to treat the residue and waste water produced in the production process of diketene. The hydrolysis process is slow, and if there is a problem in one link in the production chain, it will cause the entire hydrolysis treatment chain to be paralyzed, thereby affecting the entire production. Mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P5/02C07C49/08C07C45/82C05F5/00
CPCY02E50/343Y02A40/20Y02E50/30Y02W30/40
Inventor 王国军
Owner NINGBO WANGLONG TECH
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