Process for the preparation of pesticide-poor concentrates of active components of plants
US5660832A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1995 |
| Grant date | Aug 26, 1997 |
| Priority date | — |
| Expiry date | Jul 14, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S424/08
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Pesticide-poor concentrates of active components of plants are obtained in that in a first step plants or parts thereof, which may be charged in fresh or dried state, are extracted with at least one polar solvent at a measured pH-value in the range from 3.2 to 9.8 in such a way, that in the obtained primary extract are contained mainly the desired plant components, accompanied by undesired plant components, accompanying substances and pesticides, in a second step said primary extract is contacted with adsorber resin(s) in such a way, that on one hand the desired plant components are adsorbed thereon, and on the other hand the solution with the undesired plant components, the accompanying substances and pesticides are separated from the charged resin, in a third step the desired plant components are desorbed from said resin with at least one solvent, and in a fourth step the solvent(s) is (are) removed either partially or completely, and by this way a concentrate of active components is obtained. These concentrates of active components may be used in products of the pharma, cosmetic and food industry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.