Process for preparing chamomile essential oil with total content of natural cis- and trans-spiroethers of at least 1 percent by weight

摘要

Camomile oil with a content of natural cis- and trans spiro ethers of, in total, at least 1 wt.%, is new. The camomile oil can be prepd. by steam distn. or distn. with water of fresh camomile or extn. residues from camomile extn. Water distn. is pref. carried out at pH 4-8, opt. in the presence of reductants. The extracts pref. contain cis and trans spiro ethers in a total amt. of at least 1.0 mg/100g extract, esp. at least 0.5mg cis and 0.3mg trans spiro ether per 100g extract. The resulting camomile oil pref. contains at least 1 wt.% cis and 0.5 wt.% trans spiro ether, and can be added to any physiologically acceptable solvent to give more camomile extract.