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Ethylamine production system and technology for conducting membrane separation-hydrolysis treatment on wastewater

A technology for treating wastewater and production systems, which is applied in water/sewage treatment, natural water treatment, heating water/sewage treatment, etc., and can solve problems such as adverse environmental impact and treatment difficulties

Active Publication Date: 2019-04-12
ZHEJIANG JIANYE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the toxicity of amides to organisms and the association characteristics of amides and water, it is difficult to treat these wastewaters by conventional biochemical treatment and distillation methods, which has adverse effects on the environment. Therefore, it is urgent to propose an ethylamine that can effectively treat wastewater from ethylamine production. Amine Production Systems and Processes

Method used

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  • Ethylamine production system and technology for conducting membrane separation-hydrolysis treatment on wastewater
  • Ethylamine production system and technology for conducting membrane separation-hydrolysis treatment on wastewater

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0073] Example 1, a kind of ethylamine production system of membrane separation-hydrolysis treatment waste water, consists of fixed bed reactor 1, deammonization tower 2, ethylamine tower 3, diethylamine tower 4, dealcoholization water tower 5, alcohol recovery tower 6, A triethylamine tower 7, an extraction tower 8, a reverse osmosis membrane separator 9, a hydrolysis rectification tower 10 and an evaporator 11 are formed;

[0074] The upper part of the fixed bed reactor 1 is a vaporization chamber, and the lower part is a fixed bed reaction section, and the vaporization chamber is provided with an ammonia inlet 11, an ethanol inlet 12 and a hydrogen inlet 13;

[0075] Deamination tower 2, ethylamine tower 3, diethylamine tower 4, dealcoholization water tower 5, alcohol recovery tower 6, and triethylamine tower 7 are rectification towers, all of which are respectively provided with feed ports, The top is provided with an overhead distillate outlet and the bottom plate is prov...

Embodiment 1

[0100] Embodiment 1, utilize the production device as described in example 1 to carry out the ethylamine production process for membrane separation-hydrolysis treatment waste water, comprise the steps:

[0101] The liquid ammonia transported from the liquid ammonia inlet pipe and the ammonia gas from the top of the deamination tower 2 all enter the vaporization chamber of the fixed-bed reactor 1 through the ammonia inlet 11, and the industrial ethanol transported from the industrial ethanol inlet pipe, The ethylamine from the top of the ethylamine tower 3, the diethylamine from the top of the diethylamine tower 4 and the aqueous ethanol solution from the top of the alcohol recovery tower 6 all enter the vaporization of the fixed-bed reactor 1 through the ethanol inlet 12 room, all the above-mentioned materials enter the vaporization chamber to form raw materials, and the molar ratio of each substance in the raw materials is about ammonia:ethanol:ethylamine:diethylamine=50:135:1...

Embodiment 2

[0113] Embodiment 2, with respect to embodiment 1, change following parameter:

[0114] The mol ratio of each material in the raw material is ammonia: ethanol: ethylamine: diethylamine=43:90:10:10; Hydrogen regulates fixed-bed reactor 1 internal pressure to 0.8MPa, and fixed-bed reaction section is provided with activated catalyst ( The active component in this catalyst is cobalt and nickel, and the content of active component cobalt is 8%, and the content of cobalt is 10%, and carrier is 4A molecular sieve, and the activation treatment of hydrogen reduction before use); the reaction in fixed-bed reactor 1 The temperature is controlled at 180°C; the volumetric space velocity is 0.20h -1 ;

[0115] In the deamination tower 2, the temperature of the tower kettle is set at 50°C, and the tower top pressure is 0.8MPa; in the ethylamine tower 3, the temperature of the tower kettle is set at 55°C, and the tower top pressure is normal pressure; Tower still temperature is 65 ℃, tower...

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Abstract

The invention discloses an ethylamine production system for conducting membrane separation-hydrolysis treatment on wastewater. The ethylamine production system comprises a fixed bed reactor, a deamination tower, an ethylamine tower, a diethylamine tower, a dealcoholization water tower, an alcohol recycling tower, a triethylamine tower, an extracting tower, a reverse osmosis membrane separator, a hydrolysis rectifying tower and an evaporator; an outlet of the hydrolysis rectifying tower is communicated with an inlet of the evaporator; a tower top distillate opening of the hydrolysis rectifyingtower and a tower bottom outlet of the deamination tower are converged, and then the tower top distillate opening of the hydrolysis rectifying tower is communicated with a feeding port of the ethylamine tower; a dilute phase outlet of the reverse osmosis membrane separator is divided into two paths after running through a tee VI, one path is an outlet pipe for low-concentration wastewater, and theother path is converged with a distilled water outlet and then communicated with a heavy phase inlet. The invention further provides an ethylamine production technology for conducing membrane separation-hydrolysis treatment on wastewater through the production system. By the adoption of the method, the low-concentration wastewater is suitable for biochemical treatment.

Description

technical field [0001] The invention belongs to the field of low-carbon aliphatic amine production, and in particular relates to an ethylamine production system and process for membrane separation-hydrolysis treatment of wastewater. Background technique [0002] Ethylamine products (including ethylamine, diethylamine and triethylamine), among which triethylamine is the most demanded component in the market. The synthesis route of ethylamine has three synthetic routes: ethyl chloride amination method, nitrile or nitro substance reduction method and ethanol catalytic amination method, among which ethanol catalytic amination method is the most widely used one, its principle: raw material ethanol and liquid Ammonia is injected into the medium-pressure reaction furnace through the alcohol pump and the ammonia pump, and is converted from liquid to gas, and the gas is heated to the required reaction initial temperature. In the state of hydrogen, it is catalyzed by the catalyst, and...

Claims

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Application Information

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IPC IPC(8): C02F9/10C07C211/05C07C209/00C02F103/36C02F101/38C02F101/34
CPCC02F1/04C02F1/26C02F1/441C02F1/66C02F9/00C02F2101/34C02F2101/38C02F2103/36C07C209/00C07C211/05
Inventor 沈剑周国权冯烈蒋开炎宋同辉陈云斌钱晔谈墩玲杨泽慧
Owner ZHEJIANG JIANYE CHEM
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