REMOVAL OF METAL IONS FROM ESSENTIAL OILS

• US 20200131452A1
• Filed: 04/18/2018
• Published: 04/30/2020
• Est. Priority Date: 04/24/2017
• Status: Active Grant

• Current Assignee: Biotage AB (Biotage)
• Original Assignee: Biotage AB (Biotage)
• Inventors: JONSSON, Stig
• Granted Patent: US 10,920,171 B2
• Time in Patent Office: Days
• CPC Class Codes: A23L 2/80 by adsorption
• CPC Class Codes: A23L 33/105 Plant extracts, their artificial duplicates or their derivatives
• CPC Class Codes: A23L 5/27 by chemical treatment, by adsorption or by absorption
• CPC Class Codes: B01D 15/265 Adsorption chromatography
• CPC Class Codes: B01D 15/362 Cation-exchange
• CPC Class Codes: B01D 15/3828 Ligand exchange chromatography, e.g. complexation, chelation or metal interaction chromatography
• CPC Class Codes: B01J 20/24 Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
• CPC Class Codes: C11B 9/022 Refining

Abstract

The present invention relates to a method for separating metal ions from a liquid, which method comprises contacting liquid comprising metal ions with non-functionalized cellulose, adsorbing the metal ions to the cellulose, and separating the liquid from the cellulose, wherein the liquid is an essential oil.

Claims

1. A method for separating metal ions from a liquid, which method comprises contacting liquid comprising metal ions with non-functionalized cellulose, adsorbing metal ions to the cellulose, and separating the liquid from the cellulose, wherein the liquid comprises an essential oil.

2. A method according to claim 1, which is a chromatography method, wherein the non-functionalized cellulose is used as, or included in, the solid phase.

3. A method according to claim 1, wherein the non-functionalized cellulose comprises all or part of a filter.

4. A method according to claim 1, wherein the essential oil is selected from the group consisting of citric oils, such as lemon, orange or grape fruit oil;

and scented oils, such as spearmint.

5. A method according to claim 1, wherein the essential oil originates from a preceding IMAC or argentation chromatography step.

6. A method according to claim 5, wherein the preceding chromatography step utilizes synthetic polymers charged with metal ions.

7. A method according to claim 1, wherein the metal ion is Ag⁺.

8. A system for liquid chromatography, which system comprises equipment for at least a first and a second chromatography step, wherein for the first step, equipment for either IMAC or argentation chromatography is provided;

and for the second step, a column is provided which comprises non-functionalized cellulose.

9. Use of a scavenger chromatography column for removal of metal ions, such as Ag⁺, from essential oils, wherein the column comprises a packing which is, or includes, non-functionalized cellulose.