US 9,809,739 B2
Method for regeneration of spent ion exchange resins
Biswajit Shown, West Bengal (IN); Swapan Ghosh, Maharashtra (IN); Asit Kumar Das, Haryana (IN); Suyog Subhash Salgarkar, Maharashtra (IN); Mukunda Madhav Baishya, Assam (IN); Mitul Amrutbhai Ladani, Gujarat (IN); and Chirag Dalpatbhai Panseriya, Rajkot (IN)
Appl. No. 14/915,887
Filed by Reliance Industries Limited, Mumbai (IN)
PCT Filed Aug. 19, 2014, PCT No. PCT/IN2014/000531
§ 371(c)(1), (2) Date Mar. 1, 2016,
PCT Pub. No. WO2015/029057, PCT Pub. Date Mar. 5, 2015.
Claims priority of application No. 2850/MUM/2013 (IN), filed on Sep. 2, 2013.
Prior Publication US 2016/0199829 A1, Jul. 14, 2016
Int. Cl. B01J 41/20 (2006.01); C09K 8/524 (2006.01); B01J 49/57 (2017.01); B01J 49/60 (2017.01)
CPC C09K 8/524 (2013.01) [B01J 41/20 (2013.01); B01J 49/57 (2017.01); B01J 49/60 (2017.01)] 11 Claims
OG exemplary drawing
1. A method for regeneration of spent ion-exchange resin to obtain regenerated ion-exchange resin, said method comprising the following steps:
a. contacting said spent ion-exchange resin with at least one non-acidic crude oil condensate to obtain cleansed ion-exchange resin;
b. contacting said cleansed ion-exchange resin with at least one polar organic solvent to obtain heavy hydrocarbon free ion-exchange resin;
c. treating said heavy hydrocarbon free ion-exchange resin with a solution of at least one alkali or alkaline earth metal hydroxide to obtain activated ion-exchange resin;
d. iteratively washing said activated ion-exchange resin, for removing organic acids trapped in said activated ion-exchange resin, to obtain regenerated ion-exchange resin.