公开(公告)号：US20180273401A1

公开(公告)日：2018-09-27

申请号：US15934548

申请日：2018-03-23

Applicant: Lehigh University

Inventor： Arup K. SenGupta ,  Hang Dong ,  Michael German ,  Chelsey Shepsko

IPC: C02F1/42 ,  B01J41/12 ,  B01J39/07 ,  B01J47/127

CPC classification number: C02F1/42 ,  B01J39/07 ,  B01J41/12 ,  B01J47/127 ,  C02F2001/422 ,  C02F2001/425 ,  C02F2101/101 ,  C02F2101/103 ,  C02F2101/105 ,  C02F2101/12 ,  C02F2101/14 ,  C02F2101/163 ,  C02F2101/203 ,  C02F2101/206 ,  C02F2103/06 ,  C02F2301/08 ,  C02F2303/16 ,  C02F2305/08

Abstract: A method for purifying waste water, and a dual chamber purification system, in which feed water may be passed first through a hybrid anion exchange unit, and subsequently through a weak acid cationic exchange unit. The hybrid anion exchanger may comprise a hybrid sorbent (HAIX-NanoZr) with dual functional sorption sites. The weak acid cationic exchanger may be a fiber having a shell-core physical configuration with relatively short intra-particle diffusion path length so that the ion exchange sites reside predominantly on the periphery. The system may be used to achieve partial desalination or TDS reduction and concurrent removal of target contaminants (e.g., phosphate, hardness). Further, the system may be regenerated using CO2 as the sole regenerant for both the hybrid anion exchanger and the weak acid cationic exchanger, thus producing spent regenerant with no externally added chemicals.

公开(公告)号：US10125033B2

公开(公告)日：2018-11-13

申请号：US14883229

申请日：2015-10-14

Applicant: Lehigh University

Inventor： Arup K. Sengupta ,  Michael German ,  Jinze Li

IPC: C02F1/42 ,  C02F5/02 ,  B01D15/36 ,  B01J41/14 ,  C02F9/00 ,  C02F101/10 ,  C02F103/10 ,  C02F101/00 ,  C02F101/20

Abstract: The present invention includes an anion exchange method that uses sulfate-containing acid mine drainage (AMD), or any sulfate containing water resource, to remove strontium, barium, and/or radium from contaminated water sources, such as but not limited to hydraulic fracturing waste water, flowback, and/or produced water, without requiring any external regenerant. The removal process may be adopted with any waste water or impaired water source containing sulfate anions.

公开(公告)号：US09731983B2

公开(公告)日：2017-08-15

申请号：US14431158

申请日：2013-10-04

Applicant: LEHIGH UNIVERSITY

Inventor： Arup K Sengupta ,  Surapol Padungthon ,  Michael German ,  Jinze Li

IPC: C02F1/42 ,  B01J39/20 ,  B01J39/05 ,  B01J39/09 ,  B01J49/06 ,  B01J49/53 ,  C02F101/10 ,  C02F101/14 ,  C02F101/30 ,  C02F103/08

CPC classification number: C02F1/42 ,  B01J39/05 ,  B01J39/09 ,  B01J39/20 ,  B01J49/06 ,  B01J49/53 ,  C02F2001/425 ,  C02F2101/105 ,  C02F2101/14 ,  C02F2101/30 ,  C02F2103/08 ,  C02F2303/16

Abstract: The present invention includes a novel salt-free water softening method that utilizes an exchange medium (such as a gel exchange polymer, a macroporous exchange polymer, or an inorganic cation exchanger) that is pre-loaded with a polyvalent cation that has low solubility in aqueous phase at nearly neutral pH. The method of the invention does not require use of a sodium salt or mineral acid in the regeneration of the exchange medium.

公开(公告)号：US20150251928A1

公开(公告)日：2015-09-10

申请号：US14431158

申请日：2013-10-04

Applicant: LEHIGH UNIVERSITY

Inventor： Arup K. Sengupta ,  Surapol Padungthon ,  Michael German ,  Jinze Li

IPC: C02F1/42 ,  B01J39/18 ,  B01J39/04

CPC classification number: C02F1/42 ,  B01J39/05 ,  B01J39/09 ,  B01J39/20 ,  B01J49/06 ,  B01J49/53 ,  C02F2001/425 ,  C02F2101/105 ,  C02F2101/14 ,  C02F2101/30 ,  C02F2103/08 ,  C02F2303/16

Abstract: The present invention includes a novel salt-free water softening method that utilizes an exchange medium (such as a gel exchange polymer, a macroporous exchange polymer, or an inorganic cation exchanger) that is pre-loaded with a polyvalent cation that has low solubility in aqueous phase at nearly neutral pH. The method of the invention does not require use of a sodium salt or mineral acid in the regeneration of the exchange medium.

Abstract translation: 本发明包括一种新型的无盐水软化方法，该方法利用预先加载了低溶解度的多价阳离子的交换介质（如凝胶交换聚合物，大孔交换聚合物或无机阳离子交换剂） 水相接近中性pH。 本发明的方法不需要在再生交换介质中使用钠盐或无机酸。

公开(公告)号：US10472261B2

公开(公告)日：2019-11-12

申请号：US15934548

申请日：2018-03-23

Applicant: Lehigh University

Inventor： Arup K. SenGupta ,  Hang Dong ,  Michael German ,  Chelsey Shepsko

IPC: C02F1/42 ,  B01J41/12 ,  B01J39/07 ,  B01J47/127 ,  C02F101/16 ,  C02F101/10 ,  C02F101/12 ,  C02F101/14 ,  C02F101/20 ,  C02F103/06

Abstract: A method for purifying waste water, and a dual chamber purification system, in which feed water may be passed first through a hybrid anion exchange unit, and subsequently through a weak acid cationic exchange unit. The hybrid anion exchanger may comprise a hybrid sorbent (HAIX-NanoZr) with dual functional sorption sites. The weak acid cationic exchanger may be a fiber having a shell-core physical configuration with relatively short intra-particle diffusion path length so that the ion exchange sites reside predominantly on the periphery. The system may be used to achieve partial desalination or TDS reduction and concurrent removal of target contaminants (e.g., phosphate, hardness). Further, the system may be regenerated using CO2 as the sole regenerant for both the hybrid anion exchanger and the weak acid cationic exchanger, thus producing spent regenerant with no externally added chemicals.