Clean diethylamine production method

A technology of clean production and diethylamine, applied in separation methods, chemical instruments and methods, general water supply saving, etc., can solve problems such as high cost, large dosage of chemicals, inability to carry out biochemical treatment, etc., and achieve good society and economy Benefits, the effect of achieving zero emissions in clean production

Inactive Publication Date: 2018-05-11
浙江迪萧科技有限公司
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Problems solved by technology

In order to reuse diethylamine in wastewater, the industry often adjusts the pH by adding alkali and then rectifies it. The wastewater produced in this process has the characteristi

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  • Clean diethylamine production method

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Embodiment Construction

[0025] The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] A zero-discharge method for clean production of diethylamine, comprising the following steps: passing diethylamine hydrochloride wastewater as a raw material solution into an alkali liquor chamber of a bipolar membrane device, and obtaining the product diethylamine in the alkali liquor chamber after treatment , the content of diethylamine in the product is higher than 99% and the chloride ion is lower than 0.1%. The fresh water is passed into the acid solution chamber of the bipolar membrane device, and the treated acid solution chamber obtains a hydrochloric acid solution. The hydrochloric acid solution obtained by the bipolar membrane device is passed into the first electrodialysis device as a raw material solution, the hydrochloric acid solution obtained by the bipolar membrane device of 6L is added to the desalination chamber, the d...

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Abstract

The invention belongs to the field of industrial sewage disposal and relates to a clean diethylamine production method. According to the clean diethylamine production method for zero emission and resource recycle, through bipolar membranes in a bipolar membrane device, a diethylamine alkali liquid and a hydrochloric acid solution are obtained, the diethylamine alkali liquid is further subjected toevaporation treatment to obtain a product in which the content of diethylamine alkali reaches 99.0% or above, and the content of chloride ions is lower than 0.1%; the hydrochloric acid solution obtained from the bipolar membrane device is disposed by a first electrodialysis device to obtain a hydrochloric acid concentrated solution and a hydrochloric acid desalted solution; the hydrochloric acidconcentrated solution obtained from the first electrodialysis device is disposed by a second electrodialysis device to obtain a side product, namely a concentrated hydrochloric acid solution; the hydrochloric acid desalted solution obtained from the first electrodialysis device serves as a replenisher of a desalting chamber of the second electrodialysis device. Therefore, the method can not only achieve clean production of diethylamine but also have great social and economic benefits at the same time.

Description

technical field [0001] The invention belongs to the field of industrial sewage treatment and relates to a clean production method of diethylamine. Background technique [0002] Diethylamine is an important organic chemical raw material, which can be used in the synthesis of pharmaceutical and pesticide intermediates. In the process of synthesizing medicines with diethylamine as an intermediate, diethylamine hydrochloride wastewater with large water volume and high hydrochloric acid content is often produced. In order to reuse diethylamine in wastewater, the industry often adjusts the pH by adding alkali and then rectifying treatment. The wastewater produced in this process has the characteristics of high salt and low COD, and cannot be biochemically treated. At the same time, the process involves the addition of alkali, which requires a large dose of medicament and high cost. [0003] The bipolar membrane is a new type of ion-exchange composite membrane. Under the action o...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/469C02F101/36C02F101/38
CPCC02F1/46104C02F1/4693C02F2101/36C02F2101/38Y02A20/124
Inventor 丁武龙刘瑶王宇星
Owner 浙江迪萧科技有限公司
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