Abstract:
A process for producing the gardenia blue pigment comprising treating geniposide with a glycosidase to obtain a hydrolysate, extracting the hydrolysate with a solvent and removing the solvent after the extraction to obtain a product comprising genipin, reacting the product comprising genipin with an amino acid and/or a salt thereof under an atmosphere of inert gas, and introducing oxygen after genipin is consumed to produce the gardenia blue pigment. The process is easy-to-workup and suitable for industry and the obtained gardenia blue pigment is bright and suitable for industrial application.
Abstract:
The present invention is directed towards natural colorants comprising a material selected from the group consisting of genipin, purified genipin, pre-genipin compounds, iridoid compounds, genipin derivitatives, a genipin-containing substance, and combinations of any thereof; and a primary amine containing compound. Processes of making natural colorants are further disclosed. Additionally, processes of producing a desired color of natural colorants are disclosed.
Abstract:
The present invention relates to a process for purifying the xanthophylls astaxanthin and canthaxanthin. The process comprises suspending the xanthophyll in an organic solvent or solvent mixture, treating the suspension of the xanthophyll in the organic solvent or solvent mixture at elevated temperature, and subsequent separation off of the xanthophyll from the solvent by a solid-liquid separation, wherein the organic solvent is selected from ketones of the general formula (I) and mixtures of ketones of the general formula (I) where R 1 is C 1 -C 4 alkyl and R 2 is selected from C 1 -C 6 alkyl, C 3 -C 8 cycloalkyl, phenyl and benzyl, wherein the phenyl rings in the two last-mentioned radicals are unsubstituted or can have 1 or 2 methyl groups, or R 1 and R 2 together are linear C 4 -C 6 alkylene, which can bear 1, 2 or 3 methyl groups as substituents.
Abstract:
The present disclosure provides colorant compounds and methods of isolation of the colorant compounds derived from a reaction of genipin and an amine. The colorant compositions comprise purified compounds (e.g., a purified polymer or a purified dimer) obtained from multiple fractioning by chromatography of the reaction resulting material. The purified polymer or dimer can be used as a colorant by itself or in combination with another colorant for imparting color to a food, a drug, a cosmetic, a medical device, and textile products.
Abstract:
La présente invention vise à protéger un nouveau mode de fonctionnalisation de surface de matériaux solides avec un ou plusieurs actifs dédiés à leur procurer des propriétés particulières telles que des propriétés anti-UV, de fluorescence ou encore colorantes.
Abstract:
Gegenstand der Erfindung ist ein Verfahren zur Konditionierung und Reinigung von Pigment Orange 74, dadurch gekennzeichnet, dass man die wässrige Suspension des rohen Pigments, gegebenenfalls nach Zugabe eines organischen Lösemittels aus der Gruppe iso-Butanol, Chlorbenzol und o-Dichlorbenzol, einer Finishbehandlung unterwirft, gegebenenfalls das organische Lösemittel durch eine Destillation entfernt, und die zurückbleibende wässrige Pigmentsuspension mit einem nichtionischen Tensid versetzt, auf eine Temperatur von 30 bis 100 °C erhitzt und anschließend das Pigment abfiltriert.
Abstract:
Es wird ein Verfahren zur Reinigung von synthetisch hergestellten Verbindungen, welche eine Betain-Struktur im Molekül aufweisen, z. B. Indocyangrün, beansprucht, dass dadurch gekennzeichnet, dass Reaktionsnebenprodukte, Ausgangsverbindungen und/oder sonstige Verunreinigungen, wie bei der Herstellung eingesetztes NaI, durch Extraktion abgetrennt werden.
Abstract:
A process for manufacturing an ink, or pigment formulation (e.g. a concentrate) for use in inks, comprising filtration of a composition comprising a particulate pigment and a liquid medium through an inorganic filter having pores of a uniform size below 10 microns. The process accurately removes oversized particles that could cause problems in inkjet printers without wasting non-problematic under-sized pigment. High flow rates are achieved even with low trans-filter pressure differences. In one embodiment, high flow rates are maintained by selection of pH and/or ionic strength. The filters are more robust than conventional polymeric filters and withstand cleaning with aggressive cleaning agents.
Abstract:
Process for forming an image on a substrate comprising applying an ink thereto by means of an ink-jet printer wherein the ink comprises a liquid medium and a phthalocyanine dye fraction obtainable, by the fractionation of a solution and/or suspension of a mixture of phthalocyanine dyes of Formula: (I), and salts thereof, by cross-flow filtration: Formula: (I) wherein: M is 2H, copper or nickel; Pc represents a phthalocyanine nucleus; R 1 and R 3 independently are H or optionally substituted C 1-4 alkyl; R 2 and R 4 independently are H or optionally substituted hydrocarbyl; or R 1 and R 2 , and, R 3 and R 4 , independently, together with the nitrogen atom to which they are attached represent an optionally substituted aliphatic or aromatic ring system; x is 0 to 3.9; y is 0 to 3.9; z is 0.1 to 4; and the sum of (x+y+z) is 2.4 to 4.5.
Abstract translation:用于在基材上形成图像的方法,包括通过喷墨打印机将油墨施加到其上,其中所述油墨包括液体介质和通过将酞菁的混合物的溶液和/或悬浮液分离得到的酞菁染料级分 式(I)的染料及其盐通过交叉流过滤:式(I)其中:M为2H,铜或镍; Pc代表酞菁核; R 1和R 3独立地是H或任选取代的C 1-4烷基; R 2和R 4独立地是H或任选取代的烃基; 或R 1和R 2,并且R 3和R 4独立地与它们所连接的氮原子一起代表任选取代的脂族或芳族环系; x为0〜3.9; y为0〜3.9; z为0.1〜4; (x + y + z)的和为2.4〜4.5。