| Brief introduction | Reactive blue 14 is also called reactive green blue K-GL, gray-blue powder. The aqueous solution was a lake-blue solution. It is green in concentrated sulfuric acid, and turns blue after dilution. It is obtained by condensation of aniline 2, 5-bissulfonic acid with cyanuric chloride, condensation with ethylenediamine, and finally condensation with chlorosulfonated copper titanium cyanine for the third time. |
| production method | with copper phthalocyanine blue, aniline -2, 5-disulfonic acid, cyanuric chloride, ethylenediamine, chlorosulfonic acid as the main raw material, the first condensation of cyanuric chloride with aniline -2, 5-disulfonic acid, and then the second condensation with ethylenediamine; then, the product obtained by reacting copper phthalocyanine blue with chlorosulfonic acid is refined, and then subjected to a third condensation with the above-mentioned two-time condensation product, followed by salting out, filtration and drying to obtain a finished product.. 342kg chlorosulfonic acid (95%) and 60.5kg copper phthalocyanine blue (95%) were added to the reaction pot, heated to 130 °c ± 2 °c, kept for 4H, then cooled to 65 °c, stable for 2H. Then add 95kg thionyl chloride (100%) Dropwise, add the end of heating to 65-70 deg C, heat preservation 30min after heating to 90 deg C, heat preservation 30min, then rise to 100-105 deg C, heat preservation 30min. Dilute with ice water and filter to get filter cake. 45.2kg of aniline -2, 5-disulfonic acid (100%) was reacted with 35kg of cyanuric chloride (industrial product) at pH = 6-6.5, 5-10 °c for about 8H, and filtered to obtain the first condensation product. The first condensation product was reacted with 9.7kg of ethylenediamine (100 °c) at 30-35 °c for 6h to give a second condensation product. In the third condensation pot first add 400L ice water, 0 ℃, add all the chlorosulfonated filter cake, beating 20min, slowly add 10-20kg of sodium bicarbonate (Industrial), adjust pH = 6-7, several times to add ammonia (about 22L), heated to 15-20 ° C., 1H. The second condensation product was then added, warmed to 30-35 °c, added dropwise with 10% sodium hydroxide solution, adjusted to pH = 9-10, and incubated for 4H, then with 18% hydrochloric acid (about 10-30kg). pH = 6.5-7 was adjusted. Finally, 25%-30% of the volume of the reaction mass is added to the refined salt for salting out, and the product is filtered. After drying, grinding, and mixing with the powder, it is the finished product. |