Mixed solvent extraction of hops

Details Mixed solvent extraction of hops Mixed solvent extraction of hops

1982-02-03

1985-03-26

Naff, David M.

Food or edible material: processes, compositions, and products

Products per se, or processes of preparing or treating...

Hop derived ingredient, including hopping of wort

426 16, 426651, 426655, 426429, C12C 300, C12C 902, A23L 128

Patent

active

045073295

ABSTRACT:
An improved process for the selective extraction of the alpha acids contents of hops using liquid carbon dioxide as solvent is described. Solubility of the alpha acids in liquid carbon dioxide is enhanced by addition of a minor amount of a selected organic substance which: (1) is non-reactive with the alpha acids of interest, and (2) has the following physical properties: (a) is completely soluble in liquid carbon dioxide in the operating conditions and concentrations employed, and (b) is itself a solvent for the alpha acids of interest. Preferably the organic substance is a 1 to 4 carbon atom aliphatic alcohol in an amount of about 0.1 to about 30 volume percent.

REFERENCES:
patent: 2191838 (1940-02-01), Von Horst
patent: 3433642 (1969-03-01), Nakayama et al.
patent: 3607298 (1971-09-01), Mitchell et al.
patent: 3787499 (1974-01-01), Grant
patent: 3798332 (1974-03-01), Westerman et al.
patent: 4104409 (1978-08-01), Vitzthum et al.
patent: 4212895 (1980-07-01), Laws et al.
patent: 4218491 (1980-08-01), Laws et al.
Pollock, J. R. A., Brewing Science, vol. 1, Academic Press, N.Y., 1979 (pp. 347-357).

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