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Method and apparatus for separating cyclo-hexane oxidation waste alkali

A cyclohexane oxidation liquid, cyclohexane technology, applied in chemical instruments and methods, centrifugal separation water/sewage treatment, water/sewage multi-stage treatment, etc. Effective production time and other issues to achieve the effect of extending effective production time and solving incomplete separation

Active Publication Date: 2007-06-13
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention adopts the swirling flow coalescence series combination technology to separate the spent caustic soda from the cyclohexane oxidation liquid, which effectively solves the problem of incomplete separation of the spent caustic liquor from the cyclohexane oxidation device, and greatly prolongs the effective production of the alkane distillation tower. time, thereby solving the problems existing in the prior art

Method used

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  • Method and apparatus for separating cyclo-hexane oxidation waste alkali
  • Method and apparatus for separating cyclo-hexane oxidation waste alkali
  • Method and apparatus for separating cyclo-hexane oxidation waste alkali

Examples

Experimental program
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Effect test

Embodiment 1

[0053] According to the combined separation process of gravity settling tank, cyclone separator and coalescence separator shown in Figure 2, cyclohexane oxidation liquid waste caustic is separated, wherein

[0054] (1) Material properties

[0055] The material used is a mixture of organic phase and inorganic phase. The rated flow rate is about 275 tons / hour, the temperature is about 95-115°C, and the average temperature is about 105°C.

[0056] Density: The average organic phase is about 856.4kg / m 3 , the inorganic phase is about 954.7kg / m according to the density of water at 105°C 3 .

[0057] Viscosity: the average organic phase is about 0.665×10 -3 pa·s.

[0058] (2) Content determination

[0059] Na + The content was determined by atomic absorption spectrophotometry. The water content was determined by chromatography.

[0060] (3) Application effect

[0061] (a) After the application of the system, it effectively avoids the shutdown and cleaning of the alkane dis...

Embodiment 2

[0065] According to the flow process that adopts two-stage cyclone separator to be connected in series as shown in Figure 3, cyclohexane oxidation liquid waste caustic is separated, wherein

[0066] (1) Material properties

[0067] The material is a mixture of organic and inorganic phases. The rated flow rate is about 180 tons / hour, the temperature is about 95-115°C, and the average is about 105°C.

[0068] Density: The average organic phase is about 856.4kg / m 3 , the inorganic phase is about 954.7kg / m according to the density of water at 105°C 3 .

[0069] Viscosity: the average organic phase is about 0.665×10 -3 pa·s.

[0070] (2) Content determination

[0071] Na + The content was determined by atomic absorption spectrophotometry. The water content was determined by chromatography.

[0072] (3) Application effect

[0073] (a) After the application of the system, it effectively avoids the shutdown and cleaning of the alkane distillation tower due to fouling with al...

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Abstract

This invention provides a method and a device for separating waste alkali of cyclohexane oxidation liquid by a spiral-flow coalescence serial combination technology, which separates it in three steps in gravity sedimentation tank, a cyclone separator and a coalescence separator to separate it completely, which overcomes the shortcomings of gravity deposition method and the coalescence separation method and prolongs the effective production time of alkyl distillation tower greatly.

Description

technical field [0001] The present invention relates to a method and a device for separating spent caustic soda from cyclohexane oxidation liquid, more specifically, the present invention relates to a method and a device for separating waste caustic from cyclohexane oxidized liquid by using swirl coalescence series combination technology. Background technique [0002] The production process of cyclohexane oxidation to produce cyclohexanone includes: oxidation, decomposition, waste caustic separation, alkane distillation, saponification, refining, dehydrogenation, and heat recovery and tail gas recovery. During the decomposition process of the cyclohexane oxidation process, due to the addition of aqueous sodium hydroxide solution, a large amount of waste lye (mainly sodium carbonate, organic sodium salt and a small amount of free sodium hydroxide) will be produced. If these spent lye are brought to the subsequent alkane distillation tower with the flow, it will cause fouling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F1/58C02F1/52C02F1/38
Inventor 白志山汪华林
Owner EAST CHINA UNIV OF SCI & TECH
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