| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 521026000 | Process of regenerating | 8 |
| 20100144908 | PROCESS FOR THE REGENERATION OF AN ION EXCHANGE RESIN USING SULFUROUS ACID - A diamine absorbent that contains heat stable salts is regenerated using an ion exchange process wherein the cation exchange resin is regenerated using sulfurous acid reflux. | 06-10-2010 |
| 20120059073 | PROCESS FOR THE TREATMENT OF AN ION EXCHANGE RESIN - A process for the reactivation of an acidic ion exchange resin is described. The invention relates to the treatment of an at least partially deactivated resin which has been deactivated by contact with an impure ethylenically unsaturated acid or ester containing target impurities. The reactivation includes the step of contacting the at least partially deactivated resin with an alcohol to thereby increase the activity thereof. The invention extends to reactivating a resin deactivated by contact with an impure ethylenically unsaturated acid, ester or nitrile containing target impurities by contacting the at least partially deactivated resin with an alcohol and a carboxylic acid to thereby increase the activity thereof. A reactivated resin and a process for preparing and purifying an ethylenically unsaturated acid or ester of the following formula:— R | 03-08-2012 |
| 20120225957 | METHOD FOR RECOVERING A BORON ADSORBENT - The present embodiment relates to a method for recovering a boron adsorbent, including: preparing water having an electric resistivity of 0.01 MΩ·cm or more and kept at a temperature within a temperature range; and contacting the water with the boron adsorbent to release boron adsorbed at the boron adsorbent. | 09-06-2012 |
| 20130274357 | HYBRID ANION EXCHANGER IMPREGNATED WITH HYDRATED ZIRCONIUM OXIDE FOR SELECTIVE REMOVAL OF CONTAMINATING LIGAND AND METHODS OF MANUFACTURE AND USE THEREOF - Polymeric anion exchanger are used as host materials in which sub-micron sized hydrated Zr(IV) oxides (HZrO) particles are irreversibly dispersed within the ion exchange medium, such as beads or fibers. The HZrO can be impregnated into the pore structure of resin by mixing the parent anion exchange resin with zirconium solution prepared by pre-calcined zirconium oxide dissolved in concentrated mixture of alcohol and acid, and then followed by precipitation of HZrO particles within the resin by using alkaline solution. Since the anion exchangers have positively charged such as quaternary ammonium functional groups, anionic ligands such as arsenate, fluoride can transport in and out of the gel phase without subjected to the Donnan exclusion effect. Consequently, anion exchanger-supported HZrO submicron particles exhibit significantly greater capacity to remove arsenic and fluoride in comparison with parent anon exchange resins. Known cation exchange resins as support materials do not offer high arsenic or fluoride removal capacity. | 10-17-2013 |
| 20140148521 | METHOD FOR REMOVAL OF METAL IONS FROM AN AQUEOUS SOLUTION - The present invention relates to a method for removal of metal ions from an aqueous solution, which comprises contacting the aqueous solution with a phosphazene-formaldehyde resin as well as an ion exchange resin comprising a phosphazene-formaldehyde resin. | 05-29-2014 |
| 20140343176 | PROCESS FOR THE TREATMENT OF AN ION EXCHANGE RESIN - A process for the reactivation of an acidic ion exchange resin is described. The invention relates to the treatment of an at least partially deactivated resin which has been deactivated by contact with an impure ethylenically unsaturated acid or ester containing target impurities. The reactivation includes the step of contacting the at least partially deactivated resin with an alcohol to thereby increase the activity thereof. The invention extends to reactivating a resin deactivated by contact with an impure ethylenically unsaturated acid, ester or nitrile containing target impurities by contacting the at least partially deactivated resin with an alcohol and a carboxylic acid to thereby increase the activity thereof. A reactivated resin and a process for preparing and purifying an ethylenically unsaturated acid or ester of the following formula: | 11-20-2014 |
| 20150375222 | Regeneration of an ION Exchange Column - The present invention relates to a method of regenerating an ion exchange material loaded with chromate ions and nitrate ions in an ion exchange colunm, the method comprising subjecting the loaded ion exchange colunm to a regeneration sequence comprising the following steps: (i) passing a first salt solution through the colunm forming a first effluent solution; (ii) passing a second salt solution through the colunm to at least partially remove the chromate ions from the colunm forming a second effluent solution, wherein the, second salt solution has a higher salt concentration than the first salt solution; (iii) passing a third salt solution through the colunm to at least partially remove nitrate ions from the colunm forming a third effluent solution, wherein the third salt solution has a salt concentration higher than the second salt solution. | 12-31-2015 |
| 20160199829 | Method For Regeneration Of Spent Ion Exchange Resins | 07-14-2016 |
