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Method for treating tetramethyl ammonium carbonate with ion exchange resin

A technology of tetramethylammonium carbonate and resin, applied in the direction of amino compound purification/separation, organic chemistry, etc., can solve the problems such as the inability to realize the concentration of metal ions, and achieve the effects of easy regeneration, cost saving, energy saving and removal

Active Publication Date: 2008-12-03
HANGZHOU GREENDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since electronic-grade tetramethylammonium hydroxide requires that the content of a single metal ion be less than 10ppb, it is impossible to completely rely on ion membrane electrolysis to control the concentration of metal ions. It is necessary to use TMAC for the removal and control of metal ions on the electrolytic raw materials.

Method used

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  • Method for treating tetramethyl ammonium carbonate with ion exchange resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] At a temperature of 40°C, add 20 kg of 50% TMAC to 10 kg of activated C100 resin, and circulate for 2 hours.

[0021] The content of metal ions before treatment (unit: ppb) is: Li<0.05, Na 0.53, Mg 0.38, Al 0.25, K 0.95, Ca 0.72, Cr 61.3, Mn 4.35, Fe 220.5, Ni 38.0, Co 1.07, Cu 1.36, Zn 1.89, Mo 4.98, Cd<0.05, Pb<0.5, Ag 0.07, Ti 0.87;

[0022] The content of metal ions after treatment (unit: ppb) is: Li 0.07, Na 0.5, Mg 0.21, Al 0.44, K 0.9, Ca 0.9, Cr 40.9, Mn 2.35, Fe 180.5, Ni 1.87, Co 1.62, Cu 0.53, Zn 1.92 , Mo 2.21, Cd<0.05, Pb<0.5, Ag 0.05, Ti 0.56.

[0023] Resin regeneration.

Embodiment 2

[0025] At a temperature of 50° C., 20 kg of 50% TMAC was added to 10 kg of activated C100E resin and circulated for 6 hours.

[0026] The content of metal ions before treatment (unit: ppb) is: Li<0.05, Na 0.53, Mg 0.38, Al 0.25, K 0.95, Ca 0.72, Cr 61.3, Mn 4.35, Fe 220.5, Ni 38.0, Co 1.07, Cu 1.36, Zn 1.89, Mo 4.98, Cd<0.05, Pb<0.5, Ag 0.07, Ti 0.87;

[0027] The content of metal ions after treatment (unit: ppb) is: Li<0.05, Na 0.54, Mg 0.16, Al 0.14, K 1.02, Ca 0.32, Cr 50.9, Mn 0.98, Fe 7.8, Ni 1.5, Co 1.45, Cu0.34, Zn 1.87, Mo 2.11, Cd<0.05, Pb<0.5, Ag 0.05, Ti 0.44.

[0028] Resin regeneration.

Embodiment 3

[0030] At a temperature of 65°C, 20kg of TMAC with a concentration of 30% was added to 10kg of activated TP208 resin, and the treatment was circulated for 8 hours.

[0031] The content of metal ions before treatment (unit: ppb) is: Li<0.05, Na 0.53, Mg 0.38, Al 0.25, K 0.95, Ca 0.72, Cr 61.3, Mn 3.35, Fe 165.5, Ni 38.0, Co 0.98, Cu 1.36, Zn 1.89, Mo 2.98, Cd<0.05, Pb<0.5, Ag 0.07, Ti 0.67;

[0032] The content of metal ions after treatment (unit: ppb) is: Li<0.05, Na 0.54, Mg 0.18, Al 0.11, K 1.02, Ca 0.32, Cr 40.9, Mn 0.98, Fe 117.8, Ni 1.5, Co 1.45, Cu 0.34, Zn 1.27, Mo 2.11, Cd<0.05, Pb<0.5, Ag 0.05, Ti 0.34.

[0033] Resin regeneration.

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Abstract

The invention discloses a method for using ion exchange resins to process tetramethylammonium carbonate. The method comprises the following steps that: after the resins are activated by acids, acid and alkali resistant resins which are not dissolved in water are used for processing a tetramethylammonium carbonate water solution, and the content of a single metallic ion in the tetramethylammonium carbonate water solution is reduced to ppm level through ion exchange and absorption of metallic irons in the solution; and the processed resins are regenerated through acid treatment and can be recycled. The method can realize high-efficiency and energy-saving removal of the metallic ions, with high absorption rate; and the ion exchange resins are easy to regenerate and are recycled, thereby the cost is saved.

Description

technical field [0001] The invention relates to an ion exchange purification technology, in particular to a method for treating tetramethylammonium carbonate with an ion exchange resin. Background technique [0002] Electronic grade tetramethyl ammonium hydroxide (Tetramethyl Ammonium Hydroxide, referred to as TMAH) is used as a developer in the production process of liquid crystal and semiconductor chips, and is one of the most used electronic chemicals. The main preparation method of electronic grade tetramethylammonium hydroxide is to prepare by electrolysis of tetramethylammonium carbonate (Tetramethyl Ammonium Carbonate, referred to as TMAC). Since the electronic grade tetramethylammonium hydroxide requires that the content of a single metal ion be less than 10ppb, it is impossible to completely control the concentration of metal ions by ion membrane electrolysis, and TMAC must be used to remove and control the metal ions of the electrolytic raw material. [0003] Ion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/63C07C209/86
Inventor 姚浩川陈东良黄德新谭斌
Owner HANGZHOU GREENDA CHEM
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