Improved Process for the Extraction of Lac-dye and Shellac

12,877. Fowler, G. J., and O'Meara, E. J. June 16. Dyes from natural products.-Stick-lac is treated with suitable solvents to extract shellac and wax, either together or separately. The residues after extraction are treated with alkali or alkali carbonate solution to dissolve out the lac-dye. T...

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Bibliographische Detailangaben
Hauptverfasser: EUGENE JOHN O'MEARA, GILBERT JOHN FOWLER
Format: Patent
Sprache:eng
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Zusammenfassung:12,877. Fowler, G. J., and O'Meara, E. J. June 16. Dyes from natural products.-Stick-lac is treated with suitable solvents to extract shellac and wax, either together or separately. The residues after extraction are treated with alkali or alkali carbonate solution to dissolve out the lac-dye. The solutions may be used for dyeing or acidified and the dye precipitated.