Blue 2BLN
Disperse Blue 56
CAS: 12217-79-7
Molecular Formula: C14H9BrN2O4
Blue 2BLN - Names and Identifiers
| Name | Disperse Blue 56 |
| Synonyms | Blue 2BLN Disperse Blue 56 Disperse Blue 56 Apollon Blue E-FBL Lumacron Blue 2BLN Miketon Polyester Blue FTK Miketon Polyester Blue FBL Kayalon Polyester Blue EBL-E Intrasil Brilliant Blue 3RLN Dispersol Blue B-RL Foron Blue E-BL 1,5-diamino-2-chloro-4,8-dihydroxyanthracene-9,10-dione |
| CAS | 12217-79-7 |
| EINECS | 235-401-1 |
| InChI | InChI=1/C14H9ClN2O4/c15-4-3-7(19)10-11(12(4)17)14(21)9-6(18)2-1-5(16)8(9)13(10)20/h1-3,18-19H,16-17H2 |
Blue 2BLN - Physico-chemical Properties
| Molecular Formula | C14H9BrN2O4 |
| Molar Mass | 349.14 |
| Density | 1.4410 (rough estimate) |
| Boling Point | 129°C (rough estimate) |
| Flash Point | 360°C |
| Vapor Presure | 1.18E-18mmHg at 25°C |
| Storage Condition | Room Temprature |
| Refractive Index | 1.6800 (estimate) |
| Physical and Chemical Properties | Dark blue powder. Soluble in ethanol, acetone, pyridine and other organic solvents. In concentrated sulfuric acid in the green light yellow, diluted to Red Blue. The color of iron ion was not changed when dyeing, and the copper ion was changed greatly when dyeing. Maximum absorption wavelength (λmax) 630nm. |
Blue 2BLN - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | mainly used for dyeing polyester and its blended fabrics |
| production method | the preparation method of dispersed blue 2BLN is mercury separation method and non-mercury method. because mercury method requires mercury sulfate as sulfonation positioning agent, it brings mercury-containing wastewater and causes environmental pollution, so it is gradually stopped. The non-mercury method is also divided into phenoxy method and methoxy method. The synthesis method is as follows:. First nitrification: add 100% sulfuric acid and anthraquinone to the nitrification pot and stir evenly; Slowly add mixed acid (prepared by the same amount of 100% sulfuric acid and 100% nitric acid) within 4-5h, raise the temperature to about 80 ℃, keep it for 4-5h, cool and filter, wash with 100% sulfuric acid, then wash with water until neutral, and dry to obtain coarse product. The crude product is added to the separating pot, and 100% sulfuric acid is added to dissolve at the same time. After the temperature is raised to 120 ℃ for complete dissolution within 1h, 1,5-dinitroanthraquinone is slowly cooled and precipitated, filtered, washed with 100% sulfuric acid, washed with water until neutral, and dried to obtain 1,5-dinitroanthraquinone with a melting point of 372-375 ℃. If nitrobenzene is used for recrystallization, the melting point can rise to 384-385 ℃ (the melting point of pure products is 422 ℃). The filtrate is slowly added into ice water until the concentration of sulfuric acid reaches about 70%, 1, 8-dinitroanthraquinone is precipitated, filtered, washed with 70% sulfuric acid, then washed with water until neutral, and dried to obtain 1, 8-dinitroanthraquinone. Melting point 280-290 ℃. Phenoxylation: sodium hydroxide and phenol are added into the reaction pot, heated to 130-140 ℃ to melt them all, then cooled to 120 ℃, 1,5-dinitroanthraquinone is added, heated to 140-145 ℃ for 2 hours within 2-4 hours, heated to 145-155 ℃ for 6 hours, after measuring the end point, phenol is steamed under reduced pressure (140 ℃/21.3kPa), evaporated, diluted with heated water, added 30% sodium hydroxide solution, and stirred for 4 hours, filter and wash with water until neutral to obtain 1, 5-diphenoxy anthraquinone. Second nitrification: add a small amount of water into the nitrification pot, then add 98% sulfuric acid and 1,5-diphenoxy anthraquinone, stir and maintain 10 ℃, after all of them are dissolved, slowly add 96% nitric acid within 2 hours, add the temperature to 40 ℃, and keep the temperature for 8 hours. Then the nitrification material is poured into a large amount of ice water, filtered below 40 ℃, and the water is washed until it is neutral to obtain 1,5-(2, 4-dinitrophenoxy)-4, 8-dinitroanthraquinone. Hydrolysis: add clear water and nitrate filter cake to the hydrolysis pot, stir well, then add 30% sodium hydroxide, raise the temperature to 95 ℃, keep the temperature for 30min, cool to below 50 ℃ for filtration, wash with 3% sodium hydroxide, wash until the washing solution is acid-precipitated and filtered to obtain 1, 5-dinitro-4, 8-dihydroxyanthraquinone. The filtrate is acidified and filtered to obtain 2, 4-dinitrophenol. Reduction: Add clear water, 1,5-dinitro -4,8-dihydroxyanthraquinone filter cake into the reduction pot, stir well, then add 15% sodium sulfide solution, raise the temperature to 90 ℃, keep the temperature for 1h, cool to 40-45 ℃, filter, wash with water until neutral, then wash with 0.5% hydrochloric acid, then wash with water until neutral, and dry to obtain 1,5-diamino-4, 8-dihydroxyanthraquinone. Bromination: add 3%-5% fuming sulfuric acid, a small amount of boric acid and a filter cake for returning raw materials into a brominating pot, stir evenly (about 2 hours), add bromine, slowly raise the temperature (within about 5 hours) to 80 ℃, keep the temperature for 4 hours, cool to below 40 ℃, pour the bromide material into a large amount of ice water, filter at about 40 ℃, wash with water to be neutral, and obtain a filter cake with dispersed blue 2BLN. Post-treatment: add filter cake and diffusion agent into a grinding pot, neutralize with sodium hydroxide until pH = 7-7.5, grind at 90 ℃ for 14 hours, dry and crush to obtain the finished product. |
Last Update：2024-04-09 21:32:03
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Product Name: Disperse Blue 56 Visit Supplier Webpage Request for quotationCAS: 12217-79-7
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Mobile: 18021002903
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Wechat: 18301782025
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