US 12,436,071 B2
Method
Susan Bates, Heswall (GB); Stephanie Maria Blissett, Todmorden (GB); Zane Ashley James Brough, Middlesbrough (GB); Steven Michael Cenci, Sittingbourne (GB); Gerald Clarkson, Wirral (GB); and Raymond John Marriott, Kettering (GB)
Assigned to Conopco, Inc., Hoboken, NJ (US)
Appl. No. 18/258,059
Filed by Conopco, Inc., Englewood Cliffs, NJ (US)
PCT Filed Dec. 16, 2021, PCT No. PCT/EP2021/086107
§ 371(c)(1), (2) Date Jun. 16, 2023,
PCT Pub. No. WO2022/129287, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 20215466 (EP), filed on Dec. 18, 2020.
Prior Publication US 2024/0003790 A1, Jan. 4, 2024
Int. Cl. G01N 1/40 (2006.01); B01D 11/02 (2006.01); B01D 11/04 (2006.01)
CPC G01N 1/4055 (2013.01) [B01D 11/0203 (2013.01); B01D 11/0403 (2013.01); B01D 11/0407 (2013.01); G01N 1/4022 (2013.01); G01N 2001/4061 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of extracting a substance comprising the following steps in the following order, wherein any one or more of the steps described are performed by an automated robotic system:
(i) placing a substrate on which a substance has been adsorbed into a container in a form of an extraction basket;
(ii) attaching first and second closures to first and second ends of the container respectively in order to seal the substrate with the substance within the container;
(iii) storing the container and maintaining a temperature of the container at a predetermined temperature;
(iv) removing the first and second closures to first and second ends of the container and replacing the first and second closures with first and second plungers which first and second plungers are releasably and sealably engageable with the first and second ends of the container respectively;
(v) feeding a solvent into the container whilst restricting its exit by means of an electrically-controlled back-pressure regulator to achieve a predetermined pressure of the solvent in the container, wherein the solvent has a critical point and the predetermined pressure is above the critical point of the solvent;
(vii) transitioning the solvent into a supercritical fluid within the container by heating to a temperature above its critical point as well pressurising to a pressure above its critical point;
(viii) releasing the solvent and an extract comprising extracted substances into a separator;
(viii) reducing the temperature and pressure in the separator to remove a gaseous portion of the solvent from the extract; and
(ix) collecting the extract remaining from the separator.