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Concentration technology of cyclohexanone saponification spent lye

A waste lye, cyclohexanone technology, applied in chemical instruments and methods, heating water/sewage treatment, natural water treatment, etc., can solve problems such as high energy consumption, foaming, blocked pipes, etc. Low power consumption and energy saving effect

Inactive Publication Date: 2017-12-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high energy consumption, foaming and crystallization blockage in the process of concentrating cyclohexanone saponification waste lye, and to propose a low energy consumption, good economy, no foaming and crystallization blockage Concentration process of cyclohexanone saponification waste lye

Method used

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  • Concentration technology of cyclohexanone saponification spent lye

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Experimental program
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Embodiment 1

[0028] 10t / h cyclohexanone saponification spent caustic liquor (solid substance content is 30%) enters the spent caustic evaporating tower 2 through pressure difference, evaporates in the spent caustic evaporating tower 2, and the evaporated gas phase at 95-100°C passes through the liquid cyclone separator 1. Cycling and liquid separation, and then the gas phase enters the Roots compressor 3 and then compressed. The temperature of the gas phase at the outlet of the Roots compressor 3 is 105-115 ° C. The compressed gas phase is used as a heat source to heat and evaporate the cyclohexanone saponification waste in the waste alkali evaporation tower 2. Alkali, compressed gas phase is condensed into liquid in circulation pump 4.

[0029] The amount of liquid discharged from the hydrocyclone 1 and the circulating pump 4 is 4t / h, the power consumption of the Roots compressor 3 is 350Kw / h, and the solid content of the concentrated cyclohexanone saponification waste lye is 50%.

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Abstract

The invention discloses a concentration technology of cyclohexanone saponification spent lye. The concentration technology comprises compressing a cyclohexanone saponification spent lye steam phase through a compressor so that the compressed cyclohexanone saponification spent lye steam phase provides a heat source for concentration of cyclohexanone saponification spent lye and thus steam consumption is greatly reduced in concentration. The concentration technology has low energy consumption and good economy and does not produce foaming and crystallization.

Description

technical field [0001] The invention belongs to the field of treatment of cyclohexanone saponification waste lye, in particular to a process for concentrating cyclohexanone saponification waste lye. Background technique [0002] To prepare cyclohexanol and cyclohexanone, it is usually to oxidize cyclohexane with a gas containing molecular oxygen, first generate an oxidation mixture containing cyclohexyl hydroperoxide, cyclohexanol and cyclohexanone (commonly known as cyclohexane oxidation solution), and then use The oxidized mixture is treated with 30% sodium hydroxide liquid caustic so that the cyclohexyl hydroperoxide in it is decomposed to generate cyclohexanol and cyclohexanone. Due to the introduction of liquid caustic soda in the decomposition process of cyclohexyl hydroperoxide, the saponified waste lye with high COD concentration will be produced, and approximately every 1 ton of cyclohexanone will produce 0.8 tons of saponified waste lye. This saponified waste lye ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F103/36
CPCC02F1/041C02F2103/36
Inventor 黎树根刘洪武李勇华龙伟
Owner CHINA PETROLEUM & CHEM CORP
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