Abstract: A process for selectively extracting a target compound from a raw material using 2,3,3,3-tetrafluoropropene (HFO1234yf) as the extraction solvent, and optionally at least one co-solvent, comprising contacting the raw material with the HFO1234yf at a first temperature forming a HFO1234yf solution, and subsequently cooling the HFO1234yf solution. In particular, the application relates to a process for extracting fragrance oils, flavor oils, pharmaceutical agents, fixed oils and/or mineral oils.

Abstract: The present invention relates to a method of extracting and concentrating oils from materials in which the oils are already dispersed. More particularly, the present invention is concerned with the extraction of fixed oils or mineral oils from materials using a process of solvent extraction which is performed under elevated pressure and temperature. The solvent medium may be HFC 134a alone, or HFC 134a in combination with a suitable co-solvent which can be determined in accordance with the invention.

Abstract: The invention relates to a process for extracting fixed and mineral oils, and/or essential oils, from materials using a process of solvent extraction which is performed under pressure. The solvent is iodotrifluoromethane or iodotrifluoromethane in combination with a co-solvent. The invention also relates to an apparatus for performing the extraction of fixed and mineral oils, and/or essential oils. Substantial reductions in or elimination of the normally high latent heat of solvent evaporation may also be achieved simply by raising or lowering the temperature of or simply by adding or removing “sensible” heat from the solvent at appropriate points during its re-circulation.

Abstract: A process for extracting a compound or composition of matter from a raw material containing that compound or composition as a constituent part is described. The process comprises the steps of (1) contacting a sample of the raw material with an extraction solvent comprising a C1-4 (hydro)fluorocarbon alone or with a co-solvent, and (2) separating the solvent liquor thus obtained containing the extract from the raw material. The process may be used to extract natural products, such as flavored or aromatic oils, and biologically active compounds, such as pesticides and pharmaceuticals.

Abstract: A process for extracting a compound or composition of matter from a raw material containing that compound or composition as a constituent part is disclosed. The process comprises the steps of (1) contacting a sample of the raw material with an extraction solvent comprising 1,1,1,2-tetrafluoroethane and a co-solvent selected from an alkane and a hydrocarbon ether, (2) forming a solvent liquor comprising the extraction solvent and an extract from the raw material, and (3) separating the solvent liquor containing the extract from the raw material.