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Method and device for separating and recycling alkali waste in cyclohexane oxide solution

A cyclohexane oxidation liquid, separation and recovery technology, applied to the separation device, separation method, liquid separation, etc., can solve the problems of prolonging the effective production time of the alkane distillation tower, incomplete separation of waste lye, pollution, etc., to achieve the extension of effective Production time, solve the effect of incomplete separation

Active Publication Date: 2010-06-16
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

[0010] The invention adopts the swirl coalescence gradient combination technology to separate the spent lye from the cyclohexane oxidation liquid, which effectively solves the problem of incomplete separation of the waste lye from the cyclohexane oxidation device, and greatly prolongs the effective time of the alkane distillation tower. Production time; and adopt incineration, the method for atomization granulation to process the separated waste lye, solve the pollution problem to the environment, reclaim solid sodium carbonate, thereby solve the problem existing in the prior art

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  • Method and device for separating and recycling alkali waste in cyclohexane oxide solution
  • Method and device for separating and recycling alkali waste in cyclohexane oxide solution

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Embodiment

[0082] The present invention is further described below in conjunction with specific examples. However, it should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention. The test methods for which specific conditions are not indicated in the following examples are generally in accordance with conventional conditions, or in accordance with the conditions suggested by the manufacturer. All percentages and parts are by weight unless otherwise indicated.

[0083] Cyclohexane oxidation liquid waste caustic separation process

[0084] The separation process of cyclohexane oxidation liquid waste alkali is as follows: figure 1 shown.

[0085] 1. Material properties

[0086] The material is a mixture of organic phase and inorganic phase.

[0087] Rated flow rate 275 tons / hour;

[0088] The temperature is 95-115°C, with an average of about 105°C;

[0089] Density: organic phase average 856.4kg / m 3...

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Abstract

The invention relates to a method and a device for separating and recycling alkali waste in cyclohexane oxide solution. In the invention, gravity settling technology, cyclone separating technology and coalescing separating technology are in gradient combination to perform fine separation to the liquid alkali waste of cyclohexane oxide solution, purified cyclohexane oxide solution is led into a downstream device; the majority of separated liquid alkali waste is recycled, part of separated liquid alkali waste is discharged, the discharged separated liquid alkali waste is incinerated in an incinerator, the fusant after ncineration is recycled by using pneumatic nebulization process. The invention can reduce the Na+ content in the cyclohexane oxide solution entering into the alkane tower to below 3mg / L, the fusant after ncineration is recycled by 100%, and the pollution to the environment caused by liquid alkali waste is mainly eliminated. The invention is suitable for separating and recycling alkali waste in cyclohexane oxide solution as well as for separating and recycling alkali waste of other chemical engineering equipments.

Description

technical field [0001] The invention relates to a new method for treating waste lye in cyclohexane oxidation liquid. Specifically, the present invention relates to a method for separating and recovering spent caustic in cyclohexane oxidation liquid, which can effectively solve the problem of incomplete separation of spent caustic in the alkane tower feed, and greatly improve the efficiency of the device. The continuous operation cycle realizes the solid recovery of the molten material and reduces the discharge of pollutants. It is suitable for the separation and recovery of waste alkali in chemical plants. The invention also relates to a device for separating and recovering waste caustic in cyclohexane oxidation liquid. Background technique [0002] The production process routes of cyclohexanone mainly include hydrogenation of phenol, liquid-phase air oxidation of cyclohexane, hydration of cyclohexene, etc. Cyclohexane liquid-phase air oxidation method is the main producti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D7/00A62D3/00
CPCY10S210/908B01D17/0214C07C2101/14C07C45/33C07C2601/14C07C49/403
Inventor 白志山钱卓群马吉周萍张艳红汪华林
Owner EAST CHINA UNIV OF SCI & TECH
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