Equipment for steam stripping inorganic treating liquid, and method for removing organic pollutant

A technology for organic pollutants and treatment liquids, applied in separation methods, chemical instruments and methods, distillation separation, etc., can solve problems affecting the heat exchange efficiency of heat exchange units, discoloration of inorganic treatment liquids, blockage of heat exchange devices and pipelines, etc.

Inactive Publication Date: 2007-10-10
CHINA PETROCHEM DEVMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Individual units that require steam are controlled by control valves, but the steam formed after the control valve is decompressed often overheats. Since the heat transfer effect of superheated steam is about 10 times worse than that of saturated steam, it will affect the heat exchange unit. heat exchange efficiency
[0006] On the other hand, heating the inorganic treatment liquid containing trace organic pollutants under such overheating conditions will cause local overheating, which will lead to the deterioration of the organic pollutants, resulting in the condensation of ketones / alcohols at high temperatures to produce heavy Disadvantages such as loss of product due to oil, crystallization of waste lye at high temperature to block heat exchange devices and pipelines, and discoloration of inorganic treatment liquid due to high temperature

Method used

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  • Equipment for steam stripping inorganic treating liquid, and method for removing organic pollutant
  • Equipment for steam stripping inorganic treating liquid, and method for removing organic pollutant
  • Equipment for steam stripping inorganic treating liquid, and method for removing organic pollutant

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Embodiment 1

[0030] In the hydroxylamine-oximation circulation system, the oximation reaction is carried out to form cyclohexanone oxime, and the phosphate inorganic treatment solution after extraction and separation is carried out. The total carbon content, the total content of cyclohexanone and cyclohexanone oxime, and the content of toluene in the inorganic treatment liquid were measured, and the results are recorded in Table 1.

[0031] Utilize stripping device of the present invention, under the pressure of 1atm and the temperature condition of 110 ℃, use low-pressure steam (5kg / cm 2 , 161°C) for stripping. The total carbon content, the total content of cyclohexanone and cyclohexanone oxime, and the content of toluene of the inorganic treatment liquid after stripping were measured, and the results are recorded in Table 1.

[0032] Total carbon content (ppm)

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Abstract

A stripping apparatus for treating the inorganic treating liquid in order to remove organic pollutant from it is composed of a stripping unit, a heat exchange unit for heating said inorganic treating liquid, and a cooling unit for using cooling liquid to cool the over-heat steam before it is introduced to the heat exchanger in order to prevent the deterioration of inorganic treating liquid.

Description

technical field [0001] The invention relates to a stripping device for an inorganic treatment liquid, in more detail, relates to a stripping device for an inorganic treatment liquid used in a hydroxylamine-oximation circulation system. Background technique [0002] Caprolactam (CPL) is an important raw material used to manufacture polyamide (polyamine, PA, also known as nylon, nylon). The current method for producing caprolactam is to first produce cyclohexanone oxime in a hydroxylamine-oximation cycle system, and then perform Beckmann rearrangement to produce caprolactam. In the hydroxylamine-oximation cycle system, the reaction performance of synthetic hydroxylamine depends on the cleanliness of the inorganic process liquid (IPL) used. In the hydroxylamine-oximation circulation system, the inorganic treatment solution after the oximation reaction contains organic substances such as carboxylic acids, alcohols, aldehydes, ketones, esters, ethers, hydrocarbons and the like. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/00
Inventor 杨树鸿罗守礼
Owner CHINA PETROCHEM DEVMENT
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