The present application provides black perylene pigment microparticles having an average circularity of 0.8 or more which are amorphous; and a method of producing the black perylene pigment microparticles, which comprises a step of mixing a pigment solution in which a black perylene pigment is dissolved and a precipitation solvent for precipitating black perylene pigment microparticles from the pigment solution to form black perylene pigment microparticles, wherein at least one of the pigment solution and the precipitation solvent independently includes a salt of an alkaline earth metal and/or a particle growth inhibitor. The present invention can provide black perylene pigment microparticles having good dispersibility, high concealability and light-shielding property and controlled hue and chroma, and a method of easily producing the same, and the like.

The present application discloses methods for extracting melanin from a fungus, where the fungus is Inonotus obliquus (chaga), Fomes fomentarius, Ganoderma tsugae, or Phellinus igniarius. In the methods, a sample of the fungus is dried and pulverized to form a powder sample. The powder sample is refluxed in a sodium hydroxide solution to form a mixture. The mixture is separated into a liquid portion and a solid portion via centrifugation or vacuum filtration, resulting in the liquid portion including the melanin extract. The separated liquid portion including the melanin is acidified with a hydrochloric acid solution to precipitate the melanin. The precipitated melanin is then isolated via centrifugation or vacuum filtration such that the melanin collects as the pellet or precipitate. The melanin precipitate is then purified by washing with dilute HCl and deionized, distilled water. The purified melanin is then dried to produce the extracted fungal melanin.

The present invention provides a method of manufacturing a reactive composition: (a) dissolving 2-[(4-aminophenyl)sulfonyl]ethanesulfonic acid in water to form a solution; (b) introducing excess nitrite or excess nitrous acid and the solution into an acid solution to form a diazonium salt; (c) adding 4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid to react with the diazonium salt; (d) adding 7-acetamido-4-hydroxy-2-naphthalenesulfonic acid to react with the diazonium salt; (e) adding a first alkaline substance to adjust a pH value; (f) adding a second alkaline substance to adjust the pH value; (g) adding a third alkaline substance to control the pH value; (h) adding an acidic substance to adjust the pH value; and (i) adding an additive agent to obtain the reactive composition, wherein the additive agent is acetic acid, sodium hydroxide, acetate, sulfonic acid buffering agent, or a combination thereof.

Methods of isolating phenols from phenol-containing media. The methods include combining a phospholipid-containing composition with the phenol-containing medium to generate a combined medium, incubating the combined medium to precipitate phenols in the combined medium and thereby form a phenol precipitate phase and a phenol-depleted phase, and separating the phenol precipitate phase and the phenol-depleted phase. The methods can further include extracting phenols from the separated phenol precipitate phase. The extracting can include mixing the separated phenol precipitate phase with an extraction solvent to solubilize in the extraction solvent at least a portion of the phenols originally present in the phenol precipitate phase.

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 deriviatives, 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.

An object of the present invention is to provide a method for removing geniposide or genipin or both from a material containing geniposide or genipin or both. The present invention is a method for removing geniposide or genipin or both from a material containing geniposide or genipin or both, the method comprising treating the material containing geniposide or genipin or both using an activated carbon having (a) a methylene blue adsorption ability of 50 ml/g or more; and (b) an iodine adsorption ability of 750 mg/g or more, thereby removing geniposide or genipin or both.

The present specification relates to a method for preparing a colorant composition comprising dissolving a first xanthene-based dye having the same number of positive charges and negative charges and a second xanthene-based dye having more negative charges than positive charges by one or more in a first solvent; and precipitating the dissolved first xanthene-based dye and the dissolved second xanthene-based dye in a second solvent, and a colorant composition, a colorant dispersion, a photosensitive resin composition, a color filter and a liquid crystal display device.

A diketopyrrolopyrrole pigment compound having high weather resistance, a preparation method therefor and a use thereof, which relate to the technical field of organic pigments. The diketopyrrolopyrrole pigment compound has the structural formula (I).

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The described diketopyrrolopyrrole pigment compound may be directly used as a wet filter cake, or may be further formed into a flowing solid powder or granulated into a granulated preparation. In the various applications described, the diketopyrrolopyrrole pigment compound exhibits high saturation, good rheology, hiding power, and gloss, high tint strength, and particularly high weather resistance. The diketopyrrolopyrrole pigment compound having high weather resistance, the preparation method therefor and the use thereof have good market prospects.

A color material dispersion liquid including a color material, which is a salt-forming compound of an organic dye with a heteropolyoxometalate, a dispersant and a solvent, wherein the organic dye is at least one organic dye selected from the group consisting of a porphyrin dye, a tetraazaporphyrin dye, a phthalocyanine dye and a squarylium dye, and wherein the heteropolyoxometalate is a heteropolyoxometalate which has an oxidation-reduction potential larger than −0.3 V relative to the silver/silver chloride electrode.

The present invention relates to a valuable product in the form of a flavonoid-containing phenol mixture having intense red coloration and to a method for obtaining a valuable-substance phase, more particularly a red-colored phase, from a native substance mixture.