Obtaining saponine from horse-chesnuts / [Ludwig Weil].

  • Weil, Ludwig.
Date:
1901
Catalogue details

Licence: Public Domain Mark

Credit: Obtaining saponine from horse-chesnuts / [Ludwig Weil]. Source: Wellcome Collection.

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    9 f I 3217.—A.D. 1901. Obtaining Saponine from Jlorse-chesnuts. Horse-diestnuts as ripe as possible and fresbly fallen are opened, tbe nnts removed and peeled, tbe moist cotyledons crushed or ground and dried at a tem¬ perature of 40° to 50° Centigrade. Oil and resin is extracted from tbe yellowisb- wbite powder by means of benzine or petroleum spirit in tbe usual apparatus for extracting fat. Tbe powder freed from oil and from tbe liquid used in 5 extracting it is macerated for a sufficient length of time with boiling 93 to 96 per cent, alcohol (tbe filtered residues can be used for starch flour). Tbe hot filtered alcoholic extract is concentrated and the abundant thick precipitate which results when cold collected. The mother liquors are further concentrated and subsequently employed for new macerations. The residues, consisting for the 10 most part of saponine are dried in a vacuum, ground up, dissolved again in hot alcohol and this solution treated with freshly precipitated hydroxide of lead (from nitrate of lead and ammonia) for a short time to remove small quantities of vegetable acids and colouring matter which may be present. The hot solution is then poured off and any traces of dissolved sugar precipitated with a little ether. 15 Prom the filtrate the bulk of the solvent is distilled off, whereupon, on pouring off the concentrated solution into several times its bulk of ether the saponine is thrown down as a white precipitate. This is washed with ether; if necessary the solution and precipitation is repeated according to circumstances one or more times. After drying the saponine is obtained as a white powder which dissolves 20 in water in any proportion forming a strongly frothing liquid and giving all the usual glucoside reactions the saponine produced amounts on an average to 10 per cent, to the weight of the nuts used in the process. Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what 25 I claim is : ' Process for obtaining saponine from horsechestnuts in which the seeds fromi> which the oil has been removed, are macerated with hot alcohol, the precipitate resulting from the cooling of this filtered extract dissolved again in hot alcohol and this solution, after treating with freshly precipitated hydroxide of lead, 30 precipitated with ether, substantially as described. Dated the 14th day of February 1901. W. P. THOMPSON & Co 322, High Holborn, London, W.C. Patent Agents for the Applicant. Redhill; Printed for His Majesty^s Stationery Office, by Malcomson & Co., Ltd.—1901.
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