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Filtration and purification system for pH neutral solutions

A neutral solution and solution technology, which is used in the field of filtration and purification systems for pH neutral solutions, can solve the problems of reducing the porosity of composite materials, reducing the flow rate of liquids passing through porous composite materials, and achieving the effect of small mass transfer resistance.

Inactive Publication Date: 2002-11-13
迈克里斯公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, when a composite material comprising a polymeric binder and ion exchange resin particles is contacted with water, in the case of a porous membrane composite, the porosity of the composite material is significantly reduced, thereby significantly reducing the passage of liquid through the porous composite material. flow rate

Method used

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  • Filtration and purification system for pH neutral solutions
  • Filtration and purification system for pH neutral solutions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Embodiment 1

[0039] Examples Example 1: Continuous immobilization of multiple ligands

[0040] This example describes the use of a cartridge (10,000 cm surface area) containing a folded film of hydrophilic polyethylene 2 ) (ETCHGUARD(R); Millipore Corp.) with three ligands (SL 415, SL 420, and SL 407; IBC Advanced Technologies, Inc., American Fork, Utah) immobilized sequentially. The SL 415 ligand was first immobilized on the membrane. The cartridge was activated with 15 gms EDAC in 1.2 L of DI water for 15 minutes, followed by the addition of 15 gms EDAC in the same solution over 10 minutes or more. In the coupling step, the activation cassette was contacted with 59 gms SL 415 macrocyclic ligand solution in 1 L DI water. The coupling is effective with or without decanting the activation solution, and the contact time for the coupling reaction can be several hours or as long as overnight. Cassettes were washed with DI water in preparation for secondary ligand att...

Embodiment 2

[0042] Next, the third ligand SL 420 is immobilized in the same steps as the activation and coupling described above. The activation medium was 1.2 L of 75% IPA and 25% DI water. The SL 420 ligand was prepared by dissolving 30 gms ligand in 1 L of 75% IPA (790ml) and 25% DI water (210ml). After the coupling reaction, the cartridge was washed with a mixture of 75% IPA (790ml) and 25% DI water (210ml). Membranes were treated with cassettes to determine macrocyclic ligand capacity. Its Cu capacity is 0.034mol / cm 2 . Example 2: Simultaneous immobilization of multiple ligands

[0043] This example describes the use of a cartridge (10,000 cm surface area) containing a folded film of hydrophilic polyethylene 2 ) (ETCHGUARD®; Millipore Corp.) co-immobilized three ligands (SL 415, SL 420 and SL 407; IBC Advanced Technologies, Inc.). The SL 415 ligand was first immobilized on the membrane. The cartridge was activated with 15 gmsEDAC in 1.2 L DI water for 15 minutes, followed by t...

Embodiment 3

[0045] Embodiment 3: the purification of water

[0046] This example describes the purification of an aqueous solution containing Cu in a single-pass flow mode using a ligand membrane device of the present invention. This solution was passed through a folding cartridge device made with Cu-ligand (SL 420)-immobilized-membrane (hydrophilic polyethylene). The device has a membrane area of ​​about 10,000 cm 2 And the ligand capacity is 0.4mol / cm 2 (SL 420). The feed concentration was maintained at about 100 ppb Cu and the solution flow rate was maintained at 1 gpm. The Cu concentration of the purified product (effluent) was monitored to determine its breakthrough rate. The Cu concentration (ppb) in the product is relative to the total volume throughput (in ppb * L represents), that is, the product of the total volume of the processed product (liter) and the feed concentration (ppb), plotted, and the results are plotted in figure 2 . The data shows that the purifier continuo...

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Abstract

The present invention relates to a method for the removal of metal ions and / or particulate materials from pH neutral solutions using particle removal membranes (e.g., ultra high molecular weight polyethylene) having immobilized ligands capable of removing ions And has a high equilibrium binding constant associated with ion removal. The method is particularly useful for simultaneous filtration / purification of deionized water.

Description

Background of the invention [0001] Liquids, such as aqueous and organic liquids, are purified by passing them through a packed column of ion exchange resin beads to remove unwanted ions. Small particle size ion exchange resin particles and high flow rates are desirable to increase removal efficiency and speed at which liquids are processed. While smaller particle size resin particles increase the efficiency of packed columns, they also reduce liquid flow rates, making it difficult to optimize purification methods utilizing the particles. A generally undesirable phenomenon when using particle-packed columns is channeling, where the liquid being purified passes through only a portion of the purification bed, leaving the remainder of the purification bed unused. [0002] A significant problem associated with incorporating ion exchange resin particles into a polymer matrix is ​​that the resin particles can swell in aqueous solution. Thus, when a composite material comprising a p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/00B01D61/14B01D67/00B01D69/10B01D69/12B01D71/12B01D71/16B01D71/26B01D71/28B01D71/32B01D71/38B01D71/40B01D71/42B01D71/48B01D71/50B01D71/52B01D71/56B01D71/68B01D71/82B01J45/00C02F1/44C02F1/62C02F1/68
CPCB01D61/00B01D61/14B01J45/00C02F1/44C02F1/683C02F2101/20Y10S210/90B01D2323/30B01D67/00931
Inventor 拜平·S·佩尔克安东尼·J·德利奥爱德华·迪恩罗纳德·L·布鲁宁
Owner 迈克里斯公司
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