| Name | Reactive Blue 104 |
| Synonyms | Blue KM-GR Blue R-GL CDG Reactive Blue 104 Levafix Blue P-RA Drimarene Blue R-GL Drimarene Navy R-GL C.I.Reactive Blue 104 Drimarene Blue R-GL CDG |
| CAS | 61951-74-4 |
| Molecular Formula | C31H20ClN9O18S5.Cu.4Na |
| Physical and Chemical Properties | Dark blue powder. The solubility in water (50 °c) is 15g/L. The aqueous solution was brilliant blue, and the color was unchanged by adding 1mol/L sodium hydroxide solution, and colorless by adding sodium hydrosulfite and warming, and then adding sodium perborate could not restore the original color. In concentrated sulfuric acid in the blue, diluted yellow-brown. In concentrated nitric acid was light brown, with precipitation, diluted slightly yellow. |
| application | reactive dark blue KM-GR can be used for dyeing cotton and viscose fibers, with good dyeing performance and fastness, and is suitable for various dyeing methods. It can be dyed dark blue alone, dark gray, navy blue and other colors. It is also used for direct and anti-dyeing printing of cotton and viscose fabric, and dark anti-dyeing printing of polyester cotton cloth. It can also be used for printing and dyeing of vinylon. |
| Production method | Using 2-amino -5-acetaminobenzoic acid, o-sulfobenzaldehyde, 2-hydroxyaniline -3,5-disulfonic acid, cyanuric chloride, p (2-sulfate ethyl sulfone group) aniline as raw materials, first 2-amino -5-acetaminaminobenzoic acid diazotides and reduces, condensation with o-sulfobenzaldehyde to obtain (I), and then diazotize 2-hydroxyaniline -3, 5-disulfonic acid, and couple with (I) to obtain (II),(II) After oxidation and complexation, it is hydrolyzed to obtain (III). The first condensation of p-(2-sulfate ethyl sulfone group) aniline with cyanuric chloride, and then the second condensation with (III) to obtain the product. The finished product is salted out, filtered and dried.. Add 15%-20% 2-amino -5-acetylaminobenzoic acid (0.1kmol) formic acid solution into the reaction pot, adjust the pH value to 7.5-8 with liquid alkali, then add 30% sodium nitrite (0.1kmol) aqueous solution to mix, add the mixed solution to ice hydrochloric acid (0.3kmol), add the mixed solution at 6-12 ℃ and stir for 30min to obtain diazo liquid. Add sodium diazite (0.25kmol) into the reduction pot, add 60-80L of water to dissolve, adjust the pH value to 7-7.2 with liquid alkali, control the temperature to 18-20 ℃, add the above diazonium solution within 1.5-2h, continue to stir for 30min after adding, then raise the temperature to 55-60 ℃, stir for 1.5h, then add o-sulfobenzaldehyde (0.11kmol), stir for dissolution, add hydrochloric acid (0.77kmol) once at 50 ℃, stir for 15min, the temperature is cooled to 15-20 ℃ and filtered to obtain a condensate filter cake with a yield of about 84%. Then the filter cake is beaten, the pH value is adjusted to 7.5-8 with liquid alkali, the volume is adjusted to 330L with water, and then soda ash (0.32kmol) is added, stirred and dissolved for later use. 2-hydroxyaniline -3,5-disulfonic acid (0.084kmol) solution (15%-18%) was added to a diazo pot, the pH value was adjusted to 6-6.5 with hydrochloric acid, then hydrochloric acid (0.252kmol) was added, ice water was cooled to 5 ℃, sodium nitrite solution (0.084kmol) was added under stirring, diazotization was carried out, and stirring was continued at 8-12 ℃ for 30min. Then add copper sulfate solution cooled to below 20 ℃ (0.084kmol copper sulfate, add 80L of water to dissolve), mix evenly, add it into soda ash solution of the above filter cake within 1h, maintain 20-25 ℃, continue to keep warm for 2h after addition, and complete coupling and complexation reaction. Then 4% sodium hydroxide is added according to the coupling liquid volume, the temperature is raised to 98-100 ℃ and stirred for 3 hours. After hydrolysis, the reaction liquid volume is concentrated to 500L, about 0.5% mass activated carbon is added, stirred evenly, filtered while hot, 15%-20% mass salt is added into the filtrate for salting out and filtering to obtain dye parent filter cake. Add cyanuric chloride (0.074kmol) to the condensation pot, beat with ice water at 0-5 ℃ for 45min, then add 20% p (2-sulfate ethyl sulfone group) aniline (0.074kmol) solution, stir at 10-13 ℃ for 1h, adjust the pH value to 4-4.5 with 15% soda ash solution, continue stirring for 4h, then add 20%-25% dye matrix (about 0.093kmol) solution, finish the addition, the temperature was raised to 40-45 ℃ within 1h, the pH value was adjusted to 6.5-7 with 15% soda ash solution, and the temperature was kept warm and stirred for 4h. Filtration, the pH value of the filtrate is adjusted to 5-5.5 with acetic acid, salted out with 20% potassium chloride, stirred for 1.5-2h, filtered, and dried to obtain about 110kg of product. |