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Device and method for continuously preparing tetramethylammonium hydroxide

A technology of tetramethylammonium hydroxide and cathode, applied in sustainable manufacturing/processing, chemical industry, climate sustainability, etc., can solve the problems of high production cost and high impurity content, and achieve high production cost and low impurity content. , the effect of long service life

Active Publication Date: 2013-11-13
自贡天龙化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a device and method for continuously preparing tetramethylammonium hydroxide for the problems of high production cost and high impurity content in the existing production methods of tetramethylammonium hydroxide

Method used

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  • Device and method for continuously preparing tetramethylammonium hydroxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of raw material anolyte: Weigh 28kg of tetramethylammonium bicarbonate, add 72kg of water to it, and configure 100kg of tetramethylammonium bicarbonate solution, the mass concentration of the tetramethylammonium bicarbonate solution is 28%.

[0036] Preparation of raw catholyte: Weigh 7kg of tetramethylammonium hydroxide, add 93kg of water to it, and configure 100kg of tetramethylammonium hydroxide solution, the mass concentration of the tetramethylammonium hydroxide solution is 7%.

[0037] The production process is shown below.

[0038] (1) Initialization: The raw material anolyte is dialyzed by the H-type cation exchange column and then added to the anode chamber, and the raw catholyte is added to the cathode chamber at the same time, and then the anode electrode and the cathode electrode are respectively connected to direct current for constant current electrolysis. The current density of current electrolysis is 0.3KA / m 2 , electrolyze for 1.5h, and com...

Embodiment 2

[0043] The tetramethylammonium bicarbonate solution with a mass concentration of 30% is used as the raw material anolyte, and the tetramethylammonium hydroxide solution with a mass concentration of 10% is used as the raw material catholyte.

[0044] The production process is shown below.

[0045] (1) Initialization: Add the raw anolyte to the anode chamber after being dialyzed by the ion exchange column, and add the raw catholyte to the cathode chamber at the same time, then connect the anode electrode and the cathode electrode to direct current respectively for constant current electrolysis and constant current electrolysis The current density is 0.35KA / m 2 , electrolysis for 2 hours, and the initialization process is completed, wherein the oxygen and carbon dioxide (ie anode gas) generated in the anode chamber enter the anode gas storage tank through the anode gas outlet pipe, and the hydrogen gas generated by the cathode enters the cathode gas storage tank through the catho...

Embodiment 3

[0050] The tetramethylammonium bicarbonate solution with a mass concentration of 32% is used as the raw material anolyte, and the tetramethylammonium hydroxide solution with a mass concentration of 12% is used as the raw material catholyte.

[0051] The production process is shown below.

[0052] (1) Initialization: The raw material anolyte is dialyzed by the H-type cation exchange column and then added to the anode chamber, and the raw catholyte is added to the cathode chamber at the same time, and then the anode electrode and the cathode electrode are respectively connected to direct current for constant current electrolysis. The current density of current electrolysis is 0.38KA / m 2 , electrolysis for 1.8h, and the initialization process is completed, wherein the oxygen and carbon dioxide (ie anode gas) generated in the anode chamber enters the anode gas storage tank through the anode gas outlet pipe, and the hydrogen gas generated by the cathode enters the cathode gas stora...

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Abstract

The invention discloses a device and method for continuously preparing tetramethylammonium hydroxide, aiming to solve the problems of high production cost and high impurity content of the existing tetramethylammonium hydroxide production methods. The device comprises an ion exchange column, an electrolytic cell, an anode material tank, a cathode material tank, a cathode gas storage tank, an anode gas storage tank, a boiler, a heating trough, a first liquid pump, a second liquid pump, a third liquid pump, a first pipeline, a second pipeline, a third pipeline and a fourth pipeline. In the method, a tetramethyl ammonium bicarbonate aqueous solution is taken as anode liquor, a tetramethyl ammonium hydroxide dilute solution is taken as cathode liquor, through the mutual cooperation of the production device and a process, the process flow can be effectively shortened, and the production cost can be significantly reduced. The device and method disclosed by the invention are short in process flow, simple in operation and low in production cost, and prepared products are high in purity and high in yield, so that the energy efficiency is effectively reduced, and the defects of high power consumption and low current efficiency existing in the prior art are overcome, therefore, the device and method disclosed by the invention can adapt to the needs of industrial production.

Description

technical field [0001] The present invention relates to the field of chemical engineering, especially the field of electrochemistry, and specifically relates to a device and method for continuously preparing tetramethylammonium hydroxide. The method can effectively reduce the reaction temperature in the preparation process and effectively increase the concentration of tetramethylammonium hydroxide. Yield and purity, reduce its production cost. Background technique [0002] Tetramethylammonium hydroxide, TMAH for short, is an important organic base. It is a strong base with the same strength as caustic soda, and will not leave any substances after thermal decomposition, especially no conductive ionic substances, so it is widely used in the field of electronics industry. It is often used as a cleaning, etching, and polishing reagent for integrated circuit plates, and can also be used as a catalyst for the synthesis of silicone products such as silicone rubber, silicone resin,...

Claims

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Application Information

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IPC IPC(8): C25B3/00C25B9/10C25B9/23
CPCY02P20/10
Inventor 黄勇程杰
Owner 自贡天龙化工有限公司
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