| abstract |
The present invention relates to a method for producing plane-parallel platelets, the method comprising: a) depositing a separating agent on a carrier to produce 5 separating agent layers; and b) at least one product layer comprising a separating agent layer. And c) dissolving the separating agent layer in a solvent to produce a suspension in which at least one product layer is present in the form of plane-parallel platelets, the separating agent comprising an anthracene , Anthraquinone, acetamidophenol, acetylsalicylic acid, camphoric anhydride, benzimidazole, benzene-1,2,4-tricarboxylic acid, biphenyl-2,2-dicarboxylic acid, bis (4-hydroxyphenyl) sulfone, dihydroxyanthraquinone, hydantoin 3-hydroxybenzoic acid, 8-hydroxyquinoline-5-sulfonic acid monohydrate, 4-hydroxycoumarin, 7- Droxycoumarin, 3-hydroxynaphthalene-2-carboxylic acid, isophthalic acid, 4,4-methylene-bis-3-hydroxynaphthalene-2-carboxylic acid, naphthalene-1,8-dicarboxylic anhydride, phthalimide and its potassium Salts, phenolphthalein, phenothiazine, saccharin and its salts, tetraphenylmethane, triphenylene, triphenylmethanol, and mixtures of at least two of these substances, especially pentaerythritol (C (CH 2 OH) 4 ), trimesic acid (= 1,3,5 benzenetricarboxylic acid), DL-alanine, DL-valine, 2,6-20 diaminopurine, ascorbic acid, 1,3,5-benzenetricarboxylic acid, o-acetylsalicylic acid, diphenic acid, terephthalic acid Acid, pyrogallol Cyanuric acid, hexamethyltetramine (urotropin), fumaric acid, and 4-acetyl benzoic acid, and is selected from the group consisting of a mixture of at least two of these substances. |