초록 ▼

In general the present invention relates to a process for the removal of undesireable compounds or residues from an extract which are more polar or less polar than the desired target compound. The preferred embodiment of the present invention is a three step process and is described in detail below.

In general the present invention relates to a process for the removal of undesireable compounds or residues from an extract which are more polar or less polar than the desired target compound. The preferred embodiment of the present invention is a three step process and is described in detail below. The first step includes contacting a plant material that contains the desired target compound(s) with a solvent, thus producing a crude extract containing a mixture of compounds that includes, in addition to the undesireable residues, the desired target compound(s). The second step involves passing the crude extract through a series of columns containing an absorbent that retards the movement of the undesireable compounds, while allowing the desired compounds to pass. The third and final step involves drying the eluant product to achieve a final product.

대표청구항 ▼

[ What is claimed is:] [1.] A method of isolating target compounds free of impurities from a plant material extract, wherein the isolated target compounds retain the natural chemical profile of the plant material extract, wherein said impurities are pesticides, herbicides, fungicides, metabolites of

[ What is claimed is:] [1.] A method of isolating target compounds free of impurities from a plant material extract, wherein the isolated target compounds retain the natural chemical profile of the plant material extract, wherein said impurities are pesticides, herbicides, fungicides, metabolites of pesticides, or a combination thereof and said impurities are either more or less polar than said target compounds, said method comprising:(a) preparing a crude extract of said plant material, wherein said crude extract comprises said target compounds and said impurities;(b) preparing a series of columns comprising two or more columns, each of said columns containing the same type of an absorbent material, wherein said columns in said series are sequentially connected in a cyclical manner and wherein said absorbent material selectively absorbs said impurities but does not absorb said target compounds;(c) continually passing said crude extract through a first column in said series of columns to provide a first eluent, until a first preselected amount of said impurities is detected in said first eluent, wherein said first eluent comprises said target compounds and an amount of said impurities that is less than the amount of impurities in said crude extract;(d) continually directing said first eluent from step (c) to an adjacent column in said series of columns;(e) continually passing said first eluent through said adjacent column to provide a second eluent, until a second preselected amount of impurities is detected in said second eluent; and(f) repeating steps (d)-(e) as necessary until said target compounds free of said impurities are isolated.