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US 2010/0137646 A1Published application
Process for the preparation of xanthophyll crystals
AssigneeMulti-Tech Specialty Chemicals Co., Ltd.
InventorJian DU
Life of this patent
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Abstract
The invention describes the preparation and isolation of xanthophylls from plant sources. whereby a transesterification process is utilized without the necessity of an aqueous format.
Claims59
A process for the preparation of a xanthophyll solid comprising the steps:
- a) combining a xanthophyll ester containing plant oleoresin or suitable plant material with an alkali alcoholate, optionally with an aprotic organic solvent, to form a mixture;
- b) adding a sufficient quantity of alcohol to the mixture until xanthophyll ester(s) cannot be detected and xanthophyll solids are formed;
- and
- c) isolating the xanthophyll solid.
1 more element
A process for the preparation of a xanthophyll solid comprising the steps:
- a) combining a xanthophyll ester containing plant oleoresin or suitable plant material with an alkali alcoholate, optionally with an aprotic organic solvent, to form a mixture;
- b) heating the mixture until a homogeneous liquid is produced;
- c) adding a sufficient quantity of alcohol to the mixture until xanthophyll ester(s) cannot be detected;
- d) cooling the reaction products of step c), thereby providing a xanthophyll solid;
- and
- e) isolating the xanthophyll solid.
3 more elements
A process for the preparation of a xanthophyll solid comprising the steps:
- combining a xanthophyll ester containing plant oleoresin or suitable plant material with an alkali alcoholate, optionally with an aprotic organic solvent and a sufficient quantity of alcohol to provide a mixture, such that the final reaction produces a product wherein xanthophyll ester(s) cannot be detected and xanthophyll solids are formed;
- and
- isolating the xanthophyll solid.
Dependencies are inferred from the claim text.