Mikethrene Brown BR
Vat Brown 1
CAS: 2475-33-4
Molecular Formula: C42H18N2O6
Mikethrene Brown BR - Names and Identifiers
| Name | Vat Brown 1 |
| Synonyms | C.I. 70800 C.I. 70802 Vat Brown 1 Vat Brown Br C.I.VATBROWN1 C.I.Vat Brown 1 C.I. Vat Brown 1 Cibanone Brown BR C.I. Vat Brown 44 Anthramar Brown BR Mikethrene Brown BR Dycosthren Brown BR Vat brown 1 (C.I. 70800) |
| CAS | 2475-33-4 |
| EINECS | 219-599-7 |
| InChI | InChI=1/C42H18N2O6/c45-20-11-9-17-15-26-18(13-19(17)14-20)10-12-25-29-32-31-28(46)16-27-30(40(48)22-6-2-1-5-21(22)39(27)47)37(31)44-38(32)34-33(36(29)43-35(25)26)41(49)23-7-3-4-8-24(23)42(34)50/h1-15,44H,16H2 |
Mikethrene Brown BR - Physico-chemical Properties
| Molecular Formula | C42H18N2O6 |
| Molar Mass | 646.6 |
| Density | 1.2856 (rough estimate) |
| Boling Point | 675.58°C (rough estimate) |
| pKa | 11.33±0.20(Predicted) |
| Refractive Index | 1.4670 (estimate) |
| Physical and Chemical Properties | Dark brown powder. Insoluble in water, xylene (cold), slightly soluble in tetralin (heat), xylene (heat). In concentrated sulfuric acid was green gray, brown precipitation after dilution. It was yellow-brown in the alkaline solution of sodium hydrosulfite and dark olive in the acidic solution. |
Mikethrene Brown BR - Reference Information
| LogP | 8.52 |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | reduced brown BR is mainly used for dyeing cotton fiber with good levelness and affinity. It is also used for dyeing viscose fiber, silk, vinylon, viscose and vitamin cotton. It can also be dyed polyester-cotton blended fabric with disperse dyes by hot melt method in the same bath, and polyester is less stained. Reduced brown BR can also be combined with reduced gray BG to dye brown, and various gray and brown with reduced gray BG, brown GG and khaki GG. It is a commonly used brown variety. |
| Production method | Using 1,4-diaminoanthraquinone and 1-chloroanthraquinone as raw materials, the two are first condensed in the presence of sodium carbonate, sodium acetate, and cuprous chloride (the condensation reaction can also be carried out in nitrobenzene medium, called liquid phase method), and then closed in the presence of aluminum trichloride and sodium fluoride, and the product is obtained after oxidation by sodium hypochlorite. The finished product is filtered, dried and crushed.. 152kg 1-chloroanthraquinone, 68kg 1,4-diaminoanthraquinone, 45kg of sodium carbonate (98%), 4kg of sodium acetate (98%) and 10kg of cuprous chloride (99%) were added into a drum-type reactor. After mixing for 15min, the temperature was raised to 160-180 ℃ for dehydration within 1h, the temperature was continued to 230 ℃, and the temperature was kept for 3h. Cooling and crushing materials. Add water to the reactor to beat, then put it into a boiling pot, add water to 2000L, raise the temperature to 90-95 ℃, keep it for 1h, filter it, and wash it to neutral. Dry to moisture ≤ 0.5% to obtain about 200-205kg of condensed product. 66kg of urea (industrial product), 24kg of sodium fluoride (96%), 60kg of condensate and 180kg of anhydrous aluminum trichloride (98%) are added into the reactor. After the materials are added in sequence, they are mixed at room temperature. When hydrogen chloride gas is released, the temperature is gradually increased to 180-190 ℃, then the temperature is blown and cooled for 1 hour, then the temperature is increased to 170-180 ℃ again, kept for 3 hours, cooled and crushed for 5 hours. Then put the material into a dilution pot (1500L of water has been added into the pot), adjust the volume to 2000L, boil at 90-95 ℃ for 1h, cool to 60 ℃, filter, wash to neutral, and obtain a filter cake of about 250kg. Add 1200L of water, 160 liters of liquid alkali (30%), 1200L of sodium hypochlorite solution (10%) and 250kg of the above filter cake into the oxidation pot, raise the temperature to 80 ℃, add 8.8kg of potassium permanganate (99%), keep the temperature at 90 ℃ for 1h, filter to obtain a wet filter cake. Add 2000L of water, the above wet filter cake and 80L of hydrochloric acid (30%) to the acid boiling pot, keep it at 90-95 ℃ for 1h, filter it, and wash it until it is neutral to obtain about 50-54kg of dye. The total yield is about 85%-90% (by 100% product). |
Last Update：2024-04-09 20:15:17
