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。