Electrodeionization device for ultrapure water production

Abstract

The invention relates to an electrodeionization device for water ultra-purification. The electrodeionization device includes a plastic member that is substantially free of ionic contaminants such as sodium ions. The plastic member is formed from a nonionic blowing agent. The electrodeionization device may also include an ion exchange resin in the form of H + or OH-.

Description

Technical Field

[0001] The present invention belongs to the technical field of water purification, and more particularly, relates to an electrodeionization device for ultra-purification of water. Background Art

[0002] The demand for high-purity ultrapure water is increasing. For example, in the semiconductor industry, ultrapure water ensures the stability and consistency of semiconductor devices. Electrodeionization devices are known for purifying water by removing impurities.

[0003] Conventional plastic components used in electrodeionization devices may themselves contain small amounts of impurities, such as ionic salts, making them unsuitable for producing ultrapure water because the ionic salts may leach into the water as it is purified. Summary of the Invention

[0004] The present invention includes an electrodeionization device for ultrapurification of water, comprising a plastic component formed with a nonionic foaming agent. The nonionic foaming agent does not contain ionic salts such as sodium salts. Thus, the plastic component does not contain ionic salts and does not contaminate the water being treated. The electrodeionization device of the present invention can produce PPT or PPQ grade ultrapure water.

[0005] In one aspect, the present invention provides an electrodeionization device for water purification, comprising a plastic component formed using a nonionic foaming agent. In another aspect, the present invention provides an electrodeionization device for water purification, comprising a plastic component substantially free of ionic salts (e.g., sodium salts).

[0006] In some embodiments, the plastic component is selected from the group consisting of a diluting spacer (D-spacer), a concentrating spacer (C-spacer), a D-spacer inlet, an outlet nozzle, an anode frame, a cathode frame, a D-spacer dispenser, and combinations thereof.

[0007] In some embodiments, the plastic member is a D-spacer and / or a C-spacer.

[0008] In some embodiments, the nonionic blowing agent is a nitrogen-releasing blowing agent. The nonionic blowing agent is substantially free of ionic contaminants, such as ionic salts, including sodium salts. The nonionic blowing agent functions by releasing nitrogen during the melt process of molding the plastic part, thereby forming a 3D structure in the plastic part. Thus, the nonionic blowing agent does not release residual contaminants, such as sodium salts, into the plastic part.

[0009] Examples of suitable nonionic blowing agents include, but are not limited to, azo compounds, nitroso compounds, sulfonyl hydrazides, urea derivatives, azide compounds, and hydrazone compounds.

[0010] For example, azo compounds include azodicarbonamide, 2,2'-azobisisobutyronitrile (AIBN), diisopropyl azodicarboxylate (DIPA), barium azodicarboxylate (BaAC), azodicarboxylate, azo E, azobenzene, and diazoaminobenzene (DAB).

[0011] For example, nitroso compounds include N,N'-dinitrosopentamethylenetetramine (DPT) and N,N'-dimethyl-N,N'-dinitrosophthalamide (DMDNTA).

[0012] For example, sulfonylhydrazides include benzenesulfonylhydrazide (BSH), 4,4'-oxybis(benzenesulfonylhydrazide) (OBSH), p-toluenesulfonylhydrazide (TSH), diphenylsulfonyl-3,3'-disulfonylhydrazide, benzene-1,3-disulfonylhydrazide (BDSH), p-toluenesulfonylsemicarbazide, 4,4'-oxybis(benzenesulfonylsemicarbazide), and 3,3'-sulfonylbis(benzenesulfonylhydrazide).

[0013] For example, urea derivatives include N-nitrourea, N-nitroguanidine, and sulfonylmicazurea.

[0014] For example, the azide compounds include tosyl azide and biphenyl-4,4'-disulfonyl azide.

[0015] For example, the sulfonylhydrazone compound includes p-toluenesulfonyl acetone hydrazone.

[0016] In some embodiments, the D-spacer further comprises H + In some embodiments, the D-spacer further comprises OH - In some embodiments, the C-spacer further comprises H + In some embodiments, the C-spacer further comprises OH - Resin.

[0017] Conventional electrodeionization units use NaCl resins that leach ionic contaminants into the product water. + and / or OH - Resin can prevent the leaching of pollutants. DETAILED DESCRIPTION

[0018] The embodiments of the present invention will be clearly and completely described below. It is obvious that the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments made by those skilled in the art based on the embodiments of the present invention without making creative work are intended to be within the scope of the present invention.

[0019] The present invention includes an electrodeionization device for ultrapurification of water, comprising a plastic component formed with a nonionic foaming agent. The nonionic foaming agent does not contain ionic salts, such as sodium salts. Thus, the plastic component does not contain ionic salts and does not contaminate the water being treated. The electrodeionization device of the present invention can produce PPT or PPQ grade ultrapure water.

[0020] In one aspect, the present invention provides an electrodeionization device for water purification, comprising a plastic component formed using a nonionic foaming agent. In another aspect, the present invention provides an electrodeionization device for water purification, comprising a plastic component substantially free of ionic salts (e.g., sodium salts).

[0021] In some embodiments, the plastic component is selected from the group consisting of a diluting spacer (D-spacer), a concentrating spacer (C-spacer), a D-spacer inlet, an outlet nozzle, an anode frame, a cathode frame, a D-spacer dispenser, and combinations thereof.

[0022] In some embodiments, the plastic member is a D-spacer and / or a C-spacer.

[0023] In some embodiments, the nonionic blowing agent is a nitrogen-releasing blowing agent. The nonionic blowing agent is substantially free of ionic contaminants, such as ionic salts, including sodium salts. The nonionic blowing agent functions by releasing nitrogen during the melt process used to mold the plastic part, thereby forming a 3D structure in the plastic part. Thus, the nonionic blowing agent does not release residual contaminants, such as sodium salts, into the plastic part.

[0024] Examples of suitable nonionic blowing agents include, but are not limited to, azo compounds, nitroso compounds, sulfonyl hydrazides, urea derivatives, azide compounds, and hydrazone compounds.

[0025] For example, azo compounds include azodicarbonamide, 2,2'-azobisisobutyronitrile (AIBN), diisopropyl azodicarboxylate (DIPA), barium azodicarboxylate (BaAC), azodicarboxylate, azo E, azobenzene, and diazoaminobenzene (DAB).

[0026] For example, nitroso compounds include N,N'-dinitrosopentamethylenetetramine (DPT) and N,N'-dimethyl-N,N'-dinitrosophthalamide (DMDNTA).

[0027] For example, sulfonylhydrazides include benzenesulfonylhydrazide (BSH), 4,4'-oxybis(benzenesulfonylhydrazide) (OBSH), p-toluenesulfonylhydrazide (TSH), diphenylsulfonyl-3,3'-disulfonylhydrazide, benzene-1,3-disulfonylhydrazide (BDSH), p-toluenesulfonylsemicarbazide, 4,4'-oxybis(benzenesulfonylsemicarbazide), and 3,3'-sulfonylbis(benzenesulfonylhydrazide).

[0028] For example, urea derivatives include N-nitrourea, N-nitroguanidine, and sulfonylmicazurea.

[0029] For example, the azide compounds include tosyl azide and biphenyl-4,4'-disulfonyl azide.

[0030] For example, the sulfonylhydrazone compound includes p-toluenesulfonyl acetone hydrazone.

[0031] In some embodiments, the D-spacer further comprises H + In some embodiments, the D-spacer further comprises OH - In some embodiments, the C-spacer further comprises H + In some embodiments, the C-spacer further comprises OH - Resin.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made thereto without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An electrodeionization device for ultrapurification of water, the electrodeionization device being substantially free of sodium ions.

2. An electrodeionization device for ultrapurification of water comprising a foam plastic member substantially free of sodium ions.

3. The electrodeionization device according to claim 2, wherein: The plastic component is formed with a non-ionic foaming agent.

4. An electrodeionization device for ultrapurification of water, comprising a plastic component formed with a nonionic foaming agent.

5. The electrodeionization device according to claim 3 or 4, wherein: The plastic component is selected from the group consisting of a diluting spacer (D-spacer), a concentrating spacer (C-spacer), a D-spacer inlet, an outlet nozzle, an anode frame, a cathode frame, a D-spacer dispenser, and combinations thereof.

6. The electrodeionization device according to claim 5, wherein The plastic member is a D-spacer and / or a C-spacer.

7. The electrodeionization device according to claim 6, wherein: The D-spacer and / or C-spacer further comprises H + Resin.

8. The electrodeionization device according to claim 6, wherein: The D-spacer and / or C-spacer further comprises OH - Resin.

9. The electrodeionization device according to claim 3 or 4, wherein: The nonionic foaming agent is a nitrogen-releasing foaming agent.

10. The electrodeionization device according to claim 3 or 4, wherein: The nonionic foaming agent is selected from azo compounds, nitroso compounds, sulfonyl hydrazides, urea derivatives, azide compounds, hydrazone compounds and combinations thereof.