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: 2009-06-24
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 figure 2 The combined separation process of gravity settling tank, cyclone separator and coalescer separator is used to separate the spent caustic soda from cyclohexane oxidation liquid, 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...

Embodiment 2

[0065] according to image 3 Shown adopts the flow process that two-stage cyclone separator is connected in series to separate hexanaphthene oxidation liquid waste caustic, 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 alkali, an...

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Abstract

Provided are a method and a device for separating spent caustic soda from cyclohexane oxidation liquid by using swirl coalescence series combination technology. By combining the gravity settling tank, the cyclone separator and the coalescence separator to carry out the three-step separation of the spent caustic soda of the cyclohexane oxidation solution, the problem of incomplete separation of the spent caustic solution of the cyclohexane oxidation unit in the prior art can be effectively solved, The invention overcomes the disadvantages of the unsatisfactory effect of the existing gravity sedimentation method and the frequent flushing of the coalescence separation method, greatly prolongs the effective production time of the alkane distillation tower, thereby significantly reducing the production cost.

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