Solvent extraction
AssigneeAdvanced Phytonics Limited
InventorMazin Nicola
Life of this patent
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Abstract
There is described a process for the extraction of at least one relatively polar component from a material which may be naturally occuring or a synthetic mixture, the process comprising the steps of: (a) contacting the material with a solvent mixture comprising a C1 to C4 fluorinated hydrocarbon, especially 1,1,1,2-tetrafluoroethane and a co-solvent having a dielectric constant (at 20° C.) of at least 5; and (b) separating the charged solvent from said material, thereby to isolate said material.
Claims28
A solvent extraction process for the extraction of at least one polar component from a material, comprising the step of:
- (a) contacting the material with a solvent mixture comprising a non-chlorinated C1 to C4 fluorinated hydrocarbon and at least 0.25 wt % of a co-solvent having a dielectric constant at 20° C. of at least 5 so as to charge said solvent mixture with said at least one polar component and thereby prepare a charged solvent mixture;
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- (b) separating the charged solvent mixture from said material.
A solvent extraction process for the extraction of at least one polar component from a material, wherein said at least one polar component is an active ingredient selected from the group consisting of a pharmaceutical, a pesticide, a precursor of a pharmaceutical and a precursor of a pesticide, said process comprising the steps of:
- (a) contacting the material with a solvent mixture comprising a non-chlorinated C1 to C3 fluorinated hydrocarbon and a co-solvent so as to charge said solvent mixture with at least one polar component and thereby prepare a charged solvent mixture, wherein said fluorinated hydrocarbon has one or more carbon, fluorine and hydrogen atoms only, and the boiling point of said fluorinated hydrocarbon is greater than −50° C. and less than −10° C., and wherein said co-solvent has a dielectric constant at 20° C. of at least 5;
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- (b) separating the charged solvent mixture from said material.
A process for isolating at least one polar component from a bio-mass comprising the steps of:
- (a) contacting the bio-mass with a solvent mixture comprising a non-chlorinated C1 to C3 fluorinated hydrocarbon and a co-solvent so as to charge said solvent mixture with at least one polar component and thereby prepare a charged solvent mixture, wherein said fluorinated hydrocarbon has one or more carbon, fluorine and hydrogen atoms only, and the boiling point of said fluorinated hydrocarbon is greater than −50° C. and less than −10° C., and wherein said co-solvent has a dielectric constant at 20° C. of at least 5;
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- (b) separating the charged solvent mixture from said bio-mass.
A process for isolating at least one polar component from a bio-mass, said process comprising the steps of:
- (a) contacting the bio-mass with a solvent mixture comprising a non-chlorinated C1 to C3 fluorinated hydrocarbon and a co-solvent so as to charge said solvent mixture with at least one polar component and thereby prepare a charged solvent mixture, wherein said fluorinated hydrocarbon has one or more carbon, fluorine and hydrogen atoms only and a boiling point of greater than −50° and less than −10°, and wherein said co-solvent has a dielectric constant at 20° C. of at least 5;
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- (b) separating the charged solvent mixture from said material;
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- (c) separating said solvent mixture from said at least one polar component thereby to isolate said at least one polar component.
Dependencies are inferred from the claim text.