Oil extraction process and apparatus therefor

C - Chemistry – Metallurgy – 11 – B

Patent

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C11B 9/02 (2006.01) A23L 1/222 (2006.01) B01D 11/02 (2006.01) B01J 8/02 (2006.01) C11B 1/10 (2006.01) A23G 1/02 (2006.01)

Patent

CA 2472905

A process for solvent extraction of oils, in an extraction chamber, comprises the formation of a solvent mist with significant adiabatic cooling, whereby a pressure difference between the solvent inlet and outlet of the extraction chamber drives the solvent mist through the raw oil bearing. The solvent is fed to the extraction chamber at pressures exceeding atmospheric pressure, and the outlet of the extraction chamber is subject to a partial vacuum. An apparatus for solvent extraction comprises an extraction chamber for receiving oil bearing raw material therein, said extraction chamber comprising a solvent spray injection system connected via an inlet to a high pressure solvent feed circuit portion, said extraction chamber further connected via an outlet to a low pressure circuit portion connected to a gas recovery vacuum pump system.

L'invention concerne un procédé d'extraction d'huiles essentielles à base de solvant dans une chambre d'extraction. Ledit procédé consiste à former une brume de solvant au moyen d'un refroidissement adiabatique important, le différentiel de pression entre l'entrée et la sortie de solvant de la chambre d'extraction entraînant le brouillard de solvant à travers une matière oléagineuse brute. Ledit solvant alimente la chambre d'extraction à des pressions supérieures à la pression atmosphérique, et la sortie de la chambre est soumise à un vide partiel. Un appareil d'extraction à base de solvant comprend une chambre d'extraction destinée à recevoir une matière oléagineuse brute. Ladite chambre d'extraction comprend un système d'injection de pulvérisation de solvant connecté via une entrée à une partie de circuit d'alimentation de solvant à pression élevée, cette chambre d'extraction étant également connectée via une sortie à une partie de circuit basse pression elle-même connectée à un système de pompe à vide de récupération gazeuse.

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