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A kind of method for dealdehyde of ethylene oxide rich circulating water

A technology rich in ethylene oxide and ethylene oxide, applied in the direction of organic chemistry, can solve the problems of high energy consumption, uneconomical, high cost of dealdehyde treatment, etc., and achieve the effect of low energy consumption and low treatment cost

Active Publication Date: 2015-08-19
SANJIANG LETIAN CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of dealdehyde treatment in this method is high, the energy consumption is large, and it is quite uneconomical.

Method used

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  • A kind of method for dealdehyde of ethylene oxide rich circulating water

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Embodiment Construction

[0014] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0015] Such as figure 1 Shown, a kind of method of rich oxirane circulation water dealdehyde, comprises the following steps:

[0016] a. Injection: inject the ethylene oxide-rich circulating water from the upper part of the stripper, and the ethylene oxide-rich circulating water flows to the bottom of the stripper;

[0017] b. Heating and evaporating discharge: the circulating water rich in ethylene oxide is heated by the steam reboiler, so that ethylene oxide is evaporated from the water in the form of gas, and then discharged from the top of the stripping tower;

[0018] c. Stripping: the aldehydes contained in the remaining water after evaporation are transported to the outside of the s...

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Abstract

The invention discloses a method for removing aldehyde from ethylene oxide enriched circulating water and belongs to the technical field of chemical industry. The method is characterized by comprising the following steps: a, injection, namely injecting the ethylene oxide enriched circulating water from the upper part of a stripping tower, wherein the ethylene oxide enriched circulating water flows to the bottom of the stripping tower; b, heating, evaporating and discharging, namely heating the ethylene oxide enriched circulating water through a steam reboiler, so that the ethylene oxide is evaporated out of water in a gaseous state form, and discharging the ethylene oxide enriched circulating water from the top of the stripping tower; and c, removing, namely evaporating aldehyde substances contained in the residual water, and conveying the aldehyde substances out of the stripping tower through a tower bottom pump. The method is low in aldehyde removal treatment cost and low in energy consumption.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a method for removing aldehydes from circulating water rich in ethylene oxide. Background technique [0002] As we all know, ethylene oxide is an important chemical intermediate, and most of ethylene oxide is used to manufacture other chemicals, mainly ethylene glycol. The main end use of ethylene glycol is in the production of polyester polymers and is also used as an automotive coolant and antifreeze. Secondly, it is used to produce ethoxylates, ethanolamine, glycol ether, ethyleneamine, diethylene glycol, triethylene glycol, polyethylene glycol, hydroxyethyl cellulose, choline chloride, glyoxal, ethylene carbonate Esters and other downstream products. It can be seen that it has a wide range of uses, but in many cases, there are strict requirements on the purity of ethylene oxide, which has a great impact on the quality of subsequent products. Acetaldehyde is an isom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D303/04C07D301/32
Inventor 牛瑛山彭义秋潘晓宏毛佳杰刘智超郑春健龙经华陈长兴张伟杰张军
Owner SANJIANG LETIAN CHEM