Extracts of hops material

Details Extracts of hops material Extracts of hops material

C - Chemistry, Metallurgy

12

C

23/364, 260/588.

C12C 3/10 (2006.01) B01D 11/02 (2006.01)

Patent

CA 1082739

ABSTRACT OF THE DISCLOSURE A method of preparing an extract from a material comprises contacting the material to be extracted with carbon dioxide in the liquid state to dissolve the matter to be extracted in the liquid carbon dioxide, heating the solution of extract to evaporate carbon dioxide from the solution of extract, compressing and condensing the evaporated carbon dioxide vapour to re-form liquid carbon dioxide, and re-cycling the liquid carbon dioxide to contact the material to be extracted. At least part of the heat evolved from the carbon dioxide vapour after its compression and during its change of state from vapour to liquid carbon dioxide is used to cause the change of state of the liquid carbon dioxide in the solution of the extract to evaporate the carbon dioxide from the solution of the extract. A plant for the preparation of an extract of hops by extraction with liquid carbon dioxide is also disclosed together with modifications of the plant to enhance the recovery of hop oils or obtain a separate extraction of the hop oils. - 1 -

301617

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