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Method for producing sulfuric acid and sodium hydroxide by using bipolar membrane electroosmosis device

A technology of sodium hydroxide and bipolar membranes, applied in the field of electrochemistry, can solve problems such as waste and pollution, and achieve significant economic and environmental benefits

Inactive Publication Date: 2011-08-31
福建海能新材料有限公司
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  • Abstract
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Problems solved by technology

[0002] In the process of producing white carbon black by sulfuric acid precipitation, a large amount of sodium sulfate waste liquid will be produced. If it is not treated, it will cause a lot of pollution and waste

Method used

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  • Method for producing sulfuric acid and sodium hydroxide by using bipolar membrane electroosmosis device

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Embodiment Construction

[0014] Firstly, the white carbon black mother liquid water is filtered through a microporous precision filter to obtain a clear and transparent sodium sulfate solution, which is pumped into the high-level tank for standby. Water is injected into the compartment of the bipolar membrane and the anion and cation selective membrane, and the sodium sulfate solution is injected into the compartment composed of the anion and cation selective membrane. Turn on the DC power supply, the voltage is 100V, under the action of the DC electric field force, the positive ions (Na + ) through the cationic membrane to the compartment formed by the cationic selective membrane and the anion selective surface of the bipolar membrane facing the anode and / or to the compartment formed by the cationic selective membrane and the cathode, and split with water from the middle layer of the bipolar membrane of (OH - ) ions generate NaOH together, while the anion SO 4 2- Go through the anion membrane to t...

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Abstract

The invention relates to a method for producing sulfuric acid and sodium hydroxide by using a bipolar membrane electroosmosis device. The method comprises the following steps of: injecting sodium sulfate solution into a compartment formed by an anion selection membrane and a cation selection membrane; injecting water into compartments formed by a bipolar membrane, the anion selection membrane, and the cation selection membrane; and under the action of direct current electric field force, obtaining sodium hydroxide in the compartment formed by the cation selection membrane and an anion selection surface of the bipolar membrane which faces an anode, and / or a compartment formed by the cation selection membrane and a cathode; and obtaining sulfuric acid in the compartment formed by the anion selection membrane and a cation selection surface of the bipolar membrane which faces the cathode, and / or a compartment formed by the anion selection membrane and the cation. By the method, sodium sulfate waste liquid can be utilized again, the sulfuric acid and the sodium hydroxide which can be reutilized can be produced, waste materials are changed into things of value, and the method has obvious economic benefit and environmental benefit.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and more specifically relates to a method for producing sulfuric acid and sodium hydroxide using a bipolar membrane electrodialysis device. Background technique [0002] In the process of producing white carbon black by sulfuric acid precipitation, a large amount of sodium sulfate waste liquid will be produced. If it is not treated, it will cause a lot of pollution and waste. Contents of the invention [0003] For the problems referred to above, the present invention provides a kind of method that uses bipolar membrane electrodialysis device to produce sulfuric acid and sodium hydroxide, and this method can reuse sodium sulfate waste liquid, produces the sulfuric acid and sodium hydroxide that can reuse, Turning waste into wealth has significant economic and environmental benefits. [0004] The present invention is implemented through the following technical solutions: [0005] A method for pr...

Claims

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Application Information

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IPC IPC(8): C01B17/74C01D1/04B01D61/48
Inventor 周海波
Owner 福建海能新材料有限公司
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