Methods of preserving plant material

Details Methods of preserving plant material Methods of preserving plant material

A - Human Necessities

01

N

A01N 3/00 (2006.01) A01N 3/02 (2006.01)

Patent

CA 2185528

The invention provides a method of making preserved plant material having the colour and texture of fresh plant material and substantially free from curling or distortion, the method comprising the step of immersing the plant material in an aqueous solution comprising from 40 % to 95 % by weight of one or more C3-C6 dihydric alcohols at a temperature of from 60 ~C to 95 ~C. The dihydric alcohols preferably comprise a major fraction of propylene glycol. The immersion is preferably carried out for from 5 to 90 minutes at a temperature of from 65 to 85 ~C. The aqueous solution may also contain dehydrating alcohols and/or polyethylene glycol. The aqueous solution of the dihydric alcohols exchanges for aqueous sap and juices in the plant material, e.g. cut green foliage or cut flowers, without changing the colour or texture of the material.

L'invention se rapporte à un procédé visant à préserver une matière végétale ayant la couleur et la texture d'une matière végétale fraîche et pratiquement exempte de flétrissure ou déformation. Ce procédé consiste à immerger la matière végétale dans une solution aqueuse comprenant 40 % à 95 % en poids d'un ou plusieurs alcools dihydriques en C¿3?-C¿6? à une température comprise entre 60 ~C et 95 ~C. Les alcools dihydriques comprennent, de préférence, une fraction principale de propylène glycol. L'immersion dure, de préférence, entre 5 et 90 minutes à une température comprise entre 65 et 85 ~C. La solution aqueuse peut également contenir des alcools déshydratants et/ou du polyéthylène glycol. La solution aqueuse des alcools dihydriques fait l'échange du suc aqueux et des jus de la matière végétale, par ex., du feuillage vert coupé ou des fleurs coupées, sans modifier la couleur ou la texture de la matière.

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