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US 7,261,879 B2Granted
Iodinated anion exchange resin and process for preparing same
AssigneeTriosyn Holding Inc.
InventorPierre Jean Messier
Life of this patent
Estimating the term…
Abstract
The present invention relates to iodinated resins. It relates in particular to a process for preparing a polyiodide-resin wherein an anion exchange resin is contacted with a material capable of donating a member absorbable by the resin so as to convert the resin to the polyiodide-resin. The absorbable member is selected from the group consisting of I2 and polyiodide ion having a valence of −1. In the process, conversion of the anion exchange resin to the polyiodide-resin is effected at elevated temperature and/or elevated pressure, the elevated temperature being about 100° C. or higher, the elevated pressure being greater than atmospheric pressure. The present invention also relates to a substance comprising an iodine (impregnated) resin as produced by the above process.
Claims98
A process for preparing an iodinated resin,
- said iodinated resin being an iodinated anion exchange resin, said iodinated anion exchange resin is in a form selected from the group consisting of chloride Cl− and hydroxyl OH−,
- said process comprising a conversion step, said conversion step comprising contacting an anion exchange resin with a sufficient amount of an iodine-substance absorbable by said anion exchange resin such that said anion exchange resin absorbs said iodine-substance so as to convert said anion exchange resin to said iodinated resin, said iodine-substance being selected from the group consisting of I2 and polyiodide ions having a valence of −1,
- wherein for said conversion step at least a portion of the absorption of iodine-substance is effected at elevated temperature and at elevated pressure, said elevated temperature being a temperature higher than about 100° C. and up to about 210° C., said elevated pressure being a pressure greater than atmospheric pressure and up to about 100 psig.
A process for preparing an iodinated resin,
- said iodinated resin being an iodinated anion exchange resin, said iodinated anion exchange resin is in a form selected from the grow consisting of chloride Cl− and hydroxyl OH−,
- said process comprising a conversion step, said conversion step comprising contacting an anion exchange resin with a sufficient amount of an iodine-substance absorbable by said anion exchange resin such that said anion exchange resin absorbs said iodine-substance so as to convert said anion exchange resin to said iodinated resin, said iodine-substance being selected from the group consisting of I2 and polyiodide ions having a valence of −1,
- wherein said conversion step comprises an initial conversion stage followed by a second conversion stage, said initial conversion stage comprising contacting said anion exchange resin with said iodine-substance at a temperature of about 100° C. or lower so as to obtain an intermediate composition, said intermediate composition comprising residual absorbable iodine-substance and an intermediate iodinated resin, said second conversion stage comprising subjecting said intermediate composition to elevated temperature and elevated pressure, said elevated temperature being a temperature higher than about 100° C. and up to about 210° C., said elevated pressure being a pressure greater than atmospheric pressure and up to about 100 psig.
A process for preparing an iodinated resin,
- said iodinated resin being an iodinated weak base anion exchange resin, said iodinated anion exchange resin is in a form selected from the group consisting of chloride Cl− and hydroxyl OH−,
- said process comprising a conversion step, said conversion step comprising contacting a weak base anion exchange resin with a sufficient amount of an iodine-substance absorbable by said anion exchange resin such that said anion exchange resin absorbs said iodine-substance so as to convert said weak base anion exchange resin to said iodinated weak base anion exchange resin, said iodine-substance being selected from the group consisting of I2 and polyiodide ions having a valence of −1,
- wherein for said conversion step at least a portion of the absorption of iodine-substance is effected at elevated temperature and at elevated pressure, said elevated temperature being a temperature higher than about 100° C. and up to about 210° C., said elevated pressure being a pressure greater than atmospheric pressure and up to about 100 psig.
A process for preparing an iodinated resin,
- said iodinated resin being an iodinated weak base anion exchange resin, said iodinated anion exchange resin is in a form selected from the group consisting of chloride Cl− and hydroxyl OH−,
- said process comprising a conversion step, said conversion step comprising contacting a weak base anion exchange resin with a sufficient amount of an iodine-substance absorbable by said anion exchange resin such that said weak base anion exchange resin absorbs said iodine-substance so as to convert said weak base anion exchange resin to said iodinated weak base anion exchange resin, said iodine-substance being selected from the group consisting I2 and polyiodide ions having a valence of −1,
- wherein said conversion step comprises an initial conversion stage followed by a second conversion stage, said initial conversion stage comprising contacting said weak base anion exchange resin with said iodine-substance at a temperature of about 100° C. or lower so as to obtain an intermediate composition, said intermediate composition comprising residual absorbable iodine-substance and an intermediate iodinated resin, said second conversion stage comprising subjecting said intermediate composition to elevated temperature and elevated pressure, said elevated temperature being a temperature higher than about 100° C. and up to about 210° C., said elevated pressure being a pressure greater than atmospheric pressure and up to about 100 psig.
A process for preparing an iodinated resin,
- said iodinated resin being an iodinated anion exchange resin, said iodinated anion exchange resin is in a form selected from the group consisting of chloride Cl− and hydroxyl OH−,
- said process comprising a conversion step, said conversion step comprising contacting an anion exchange resin with a sufficient amount of an iodine-substance absorbable by said anion exchange resin such that said anion exchange resin absorbs said iodine-substance so as to convert said anion exchange resin to said iodinated resin, said iodine-substance being selected from the group consisting of I2 and polyiodide ions having a valence of −1,
- wherein for said conversion step at least a portion of the absorption of iodine-substance is effected at elevated pressure, said elevated pressure being a pressure greater than 2 psig and up to about 100 psig.
A process for preparing an iodinated resin,
- said iodinated resin being an iodinated anion exchange resin, said iodinated anion exchange resin is in a form selected from the group consisting of chloride Cl− and hydroxyl OH−,
- said process comprising a conversion step, said conversion step comprising contacting an anion exchange resin with a sufficient amount of an iodine-substance absorbable by said anion exchange resin such that said anion exchange resin absorbs said iodine-substance so as to convert said anion exchange resin to said iodinated resin, said iodine-substance being selected from the group consisting of I2 and polyiodide ions having a valence of −1,
- wherein said conversion step comprises an initial conversion stage followed by a second conversion stage, said initial conversion stage comprising contacting said anion exchange resin with said iodine-substance at a temperature of about 100° C. or lower so as to obtain an intermediate composition, said intermediate composition comprising residual absorbable iodine-substance and an intermediate iodinated resin, said second conversion stage comprising subjecting said intermediate composition to elevated pressure, said elevated pressure being a pressure greater than 2 psig and up to about 100 psig.
Dependencies are inferred from the claim text.