Separator
US-2016304358-A1 · Oct 20, 2016 · US
Regeneration of chromatographic stationary phases
US9364772B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9364772-B2 |
| Application number | US-9877908-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 7, 2008 |
| Priority date | Apr 8, 2003 |
| Publication date | Jun 14, 2016 |
| Grant date | Jun 14, 2016 |
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Abstract
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Process for regenerating a chromatographic stationary phase.
First claim
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The invention claimed is: 1. A process for regenerating a silica material or a substituted silica material chromatographic stationary phase comprising contacting said silica material or a substituted silica material chromatographic stationary phase at a temperature in the range from about 0° C. to about 70° C. with a regeneration solution comprising at least one organic acid and less than about 75% w/w water, wherein said organic acid is formic acid, wherein the concentration of formic acid is at least 25% w/w, and wherein said chromatographic stationary phase is a Reverse Phase-High Pressure Liquid Chromatography (RP-HPLC) matrix. 2. The process according to claim 1 , wherein the regeneration solution comprises at least one organic acid and less than about 1% w/w water. 3. The process according to claim 1 , wherein said regeneration solution contains less than 0.5% water. 4. The process according to claim 1 , wherein said chromatographic stationary phase is contacted with said regeneration solution inside the chromatographic column. 5. The process according to claim 4 , wherein said chromatographic stationary phase is regenerated without repacking the column. 6. The process according to claim 4 , wherein said chromatographic stationary phase is fluidized during said regeneration. 7. The process according to claim 4 , wherein a chromatographic eluent or equilibrium buffer is displaced by a water miscible organic solvent before said chromatographic stationary phase is contacted with said regeneration solution. 8. The process according to claim 7 , wherein said organic solvent is also present in the chromatographic eluent or equilibrium buffer. 9. The process according to claim 8 , wherein said water miscible organic solvent is also present in the regeneration solution. 10. The process according to claim 1 , wherein said chromatographic stationary phase is contacted with said regeneration solution outside the chromatographic column. 11. The process according to claim 1 , wherein said chromatographic stationary phase is C16 or C18 substituted silica. 12. The process according to claim 1 , wherein said chromatographic stationary phase is C4, C8 or phenyl-substituted silica. 13. The process according to claim 1 , wherein said chromatographic stationary phase is contacted with said regeneration solution for at least 1 minute. 14. The process according to claim 1 , wherein said chromatographic stationary phase is contacted with said regeneration solution until the pressure drop over the length of the chromatographic column at normal flow rate decreases by at least 10%. 15. The process according to claim 1 , wherein contacting of said chromatographic stationary phase with said regeneration solution is performed at a temperature in the range from about 5° C. to 50° C. 16. The process according to claim 1 , wherein the life time of said chromatographic stationary phase is at least 500 chromatographic cycles. 17. The process according to claim 1 , wherein said process is applied to said chromatographic stationary phase for every chromatographic cycle. 18. The process according to claim 1 , wherein said process is applied to said chromatographic stationary phase at least once every 100 chromatographic cycles.
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Classifications
Equilibration or regeneration · CPC title
Partition-, reverse-phase or hydrophobic interaction chromatography · CPC title
of sorbents or filter aids other than those covered by B01J20/3408 - B01J20/3425 · CPC title
- B01D15/20Primary
relating to the conditioning of the sorbent material · CPC title
Regenerating or reactivating · CPC title
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Frequently asked questions
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- What does patent US9364772B2 cover?
- Process for regenerating a chromatographic stationary phase.
- Who is the assignee on this patent?
- Larsen Per, Schou Ole, Rasmussen Eigil Schroder, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification B01D15/20. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jun 14 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).