Separation method and system for mixture of ethanol, diphenyl carbonate and diphenyl carbonate

A diphenyl carbonate and separation method technology, which is applied in the separation of dibutyl mixed organic matter, ethanol, and diphenyl carbonate, can solve the problems of ternary organic waste liquid separation difficulties, high vacuum, and environmental pollution, and achieve Easy to control, low temperature, environmental protection effect

Inactive Publication Date: 2019-02-15
四川久润环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the PVDF membrane industry, diphenyl carbonate (DPC) and dibutyl ester (DBP) are widely used as polymer intergranular fillers, and the formation of micropores in polymer membranes requires extraction and cleaning with absolute ethanol , Diphenyl carbonate (DPC) and dibutyl ester (DBP) are dissolved in ethanol solvent to generate a large amount of ternary organic waste liquid, which must be treated by scientific methods, otherwise, it will cause waste of raw materials, Rising costs and endangering the environment we depend on
[0004] The

Method used

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  • Separation method and system for mixture of ethanol, diphenyl carbonate and diphenyl carbonate

Examples

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example 1

[0066] will be 1.5m 3 The ternary mixed organic waste liquid of ethanol, DPC and DBP produced in the membrane industry, at a temperature of 60°C, is pumped into the DT crystallizer through a constant temperature pipeline, and the stirring speed is controlled at 45r.min -1 , turn on the cooling liquid circulation cooling, generally the temperature of the cooling crystallization material is controlled at 8 ° C, the cooling time is 4 hours, and then pumped into the centrifuge with a separation factor of 1000 for separation, the weight of DPC obtained is 65 kg, and the content of DPC is detected after drying 99.5%, can be returned to use;

[0067] The separated liquid is poured into the GMB evaporator for evaporation. The temperature in the GMB evaporator is controlled at 80°C, the frequency of the feed pump is 20Hz, the vapor pressure is 0.3MPa, and 1.3m is obtained by continuous evaporation for 3 hours. 3 The ethanol solution, after checking that the main content of ethanol is ...

example 2

[0070] will be 1.5m 3 The ternary mixed organic waste liquid of ethanol, DPC and DBP produced in the film industry, at a temperature of 65°C, is pumped into the DT crystallizer through a constant temperature pipeline, and the stirring speed is controlled to 30r.min -1 , Turn on the cooling liquid circulation cooling, generally the temperature of the cooling crystallization material is controlled at 15°C, the cooling time is 2.5hr, and then pumped into the centrifuge with a separation factor of 1300 for separation, the weight of DPC obtained is 64.5kg, and the DPC is detected after drying The content is 99.4%, which can be returned for use;

[0071] The separated liquid is poured into the GMB evaporator for evaporation. The temperature in the GMB evaporator is controlled at 82°C, the frequency of the feed pump is 25Hz, the vapor pressure is 0.2MPa, and 1.35m is obtained by continuous evaporation for 3 hours. 3 The ethanol solution, after checking that the main content of ethan...

example 3

[0074] will be 1.5m 3 The ternary mixed organic waste liquid of ethanol, DPC and DBP produced in the membrane industry, at a temperature of 62°C, is pumped into the DT crystallizer through a constant temperature pipeline, and the stirring speed is controlled at 60r.min -1 , turn on the cooling liquid circulation cooling, generally the temperature of the cooling crystallization material is controlled at 20°C, the cooling time is 4.5hr, and then pumped into a centrifuge with high separation factor for separation, the weight of DPC obtained is 63.8kg, and the DPC is detected after drying The content is 99.3%, which can be returned for use;

[0075] The separated liquid is poured into the GMB evaporator for evaporation. The temperature in the GMB evaporator is controlled at 81°C, the frequency of the feed pump is 22Hz, the vapor pressure is 0.25MPa, and 1.28 m is obtained by continuous evaporation for 3 hours. 3 The ethanol solution, after checking that the main content of ethano...

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Abstract

The invention relates to a separation method for a mixture of ethanol, diphenyl carbonate and diphenyl carbonate. The method comprises the following steps: feeding a thermal solution of ternary mixedorganic waste liquor of ethanol, DPC and DBP into a crystallizer to be cooled circularly, wherein the feed liquid temperature is reduced to be lower than constant temperature; then separating the feedliquid through a centrifugal machine, wherein solid crystals are DPC, and a liquid is a mixed solution of ethanol and DBP; feeding the mixed solution of ethanol and DBP into an evaporator, controlling the quantity of steam and the material feeding amount by adopting a temperature variable of the evaporator, and evaporating and separating the mixed solution, wherein ethanol escapes from the upperpart and is cooled by circulating cooling water, to obtain an ethanol liquid; a DBP solution flows from the lower part. A separation system for the mixture of ethanol, diphenyl carbonate and diphenylcarbonate is used for achieving the method. The method is simple to operate, finishes thorough separation at a relatively low temperature, the main contents of separated DPC and ethanol reach 98.5% orhigher, the main contents of DBP also reach 97.0% or higher, a recycling demand is met, material waste is avoided, the cost is reduced, and the environment is protected.

Description

technical field [0001] The invention relates to the separation of membrane-making waste liquid, in particular to a method for separating mixed organic matter of ethanol, diphenyl carbonate and dibutyl ester. Background technique [0002] In recent years, with the continuous improvement of our living standards, people pay more and more attention to environmental protection, especially the protection and recycling of water resources, which has led to the rapid development of the organic membrane industry. [0003] In the PVDF membrane industry, diphenyl carbonate (DPC) and dibutyl ester (DBP) are widely used as polymer intergranular fillers, and the formation of micropores in polymer membranes requires extraction and cleaning with absolute ethanol , Diphenyl carbonate (DPC) and dibutyl ester (DBP) are dissolved in ethanol solvent to generate a large amount of ternary organic waste liquid, which must be treated by scientific methods, otherwise, it will cause waste of raw materi...

Claims

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Application Information

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IPC IPC(8): C07C68/08C07C69/96C07C67/48C07C67/52C07C67/54C07C69/80C07C29/74C07C29/78C07C29/80C07C31/08
CPCC07C29/74C07C29/78C07C29/80C07C67/48C07C67/52C07C67/54C07C68/08C07C69/96C07C69/80C07C31/08
Inventor 杜伟汪英海田满红胡莉胡义华王锐
Owner 四川久润环保科技有限公司
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