Dycosthren Khaki GG
Vat Green 8
CAS: 14999-97-4
Molecular Formula: C70H28N4O10
Dycosthren Khaki GG - Names and Identifiers
| Name | Vat Green 8 |
| Synonyms | Khaki 2G Vat Khaki 2G C.I.VATGREEN8 Vat Green 8 Dycosthren Khaki GG Vat green 8 (C.I. 71050) |
| CAS | 14999-97-4 |
| EINECS | 239-092-4 |
| InChI | InChI=1/C70H28N4O10/c75-45-13-5-7-25-15-33-35(17-31(25)45)59-41(21-47(33)77)51-57-55-49(79)23-43-53(69(83)29-11-3-1-9-27(29)67(43)81)65(55)73-63(57)39-19-38-40(20-37(39)61(51)71-59)64-58(56-50(80)24-44-54(66(56)74-64)70(84)30-12-4-2-10-28(30)68(44)82)52-42-22-48(78)34-16-26-8-6-14-46(76)32(26)18-36(34)60(42)72-62(38)52/h1-20H,21-24H2 |
Dycosthren Khaki GG - Physico-chemical Properties
| Molecular Formula | C70H28N4O10 |
| Molar Mass | 1085.01 |
| Density | 1.739±0.06 g/cm3(Predicted) |
| pKa | 10.57±0.20(Predicted) |
| Refractive Index | 1.977 |
Dycosthren Khaki GG - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| brief introduction | c. I. pigment green 8 was first invented by BASF company in 1921, and is still produced by many manufacturers. it is a relatively important nitroso green pigment, which is formed by complexing 1-nitroso -1-naphthol with iron salt. The pigment has excellent aromatic solvent resistance and good light fastness, and the light fastness reaches grade 7 (1/3SD) in latex coatings. The light fastness of TiO2 light color (1:200) is 6-7 grade. |
| application | reduced green 8 is often combined with reduced brown GG, BR, vulcanized reduced black CLN, etc. to dye various different colors of brown thread, with reduced olive green B to dye various colors of olive green thread, and with reduced olive cable green B or reduced brilliant green FFB to dye grass fabric green. After finishing with urea-formaldehyde or cyanaldehyde resin, the dyed fabric of this product becomes slightly lighter in color, which is an important dye variety for dyeing military uniform fabric in China. |
| Preparation | A new method for synthesizing reduced green 8, which includes the following steps: 1) Put 3000kg of 20% fuming sulfuric acid in a chlorinated pot, start stirring, then add 250kg of anthraquinone, raise the temperature to 90-100 ℃, continue stirring and dissolving for 1 hour, then add 1kg of positioning agent iodine, and then introduce chlorine, the temperature of chlorination is controlled at 50-150 ℃, and after 100-200 hours of reaction, 1000kg of 92.5% sulfuric acid is added for dilution, filtration, pickling, washing with water to be neutral, and drying to obtain tetrachloroanthraquinone for later use. 2) Put 50kg of tetrachloroanthraquinone, 70kg of 1-amino anthraquinone, 80kg of soda ash and 5kg of copper powder obtained in step 1) into a reactor and mix them evenly, then heat up and dehydrate, after dehydration is completed, the temperature in the reactor is raised to 200-270 ℃ in 1.5-4 hours, and the heat preservation reaction is carried out for 4 hours. After the heat preservation is completed, the temperature is cooled and crushed to obtain the crude product tetraanthraquinone imine; 3) The inorganic salt in the crude tetraanthraquinone imine is removed by heating and heating, and the filtered water is washed until neutral and dried to obtain refined tetraanthraquinone imine; the heating and boiling temperature is 90-95 ℃, and the holding time is 1 hour; 4) In the medium of aluminum trichloride and pyridine, the refined tetraanthraquinone imine prepared in step 3) is closed-loop to obtain a crude reduced green 8 original dye; the mass ratio of aluminum trichloride, pyridine and tetraanthraquinone imine is 1-2:2-3:1;5) Put the crude reduced green 8 original dye obtained in step 4) into a 6mol/L sodium hydroxide solution, and then distilled to separate pyridine, after distillation, the material is washed with water until pH 7-9 to obtain the filter cake for later use; 6) The filter cake obtained in step 5) is completely dissolved in alkaline solution, then 5000kg of sodium hypochlorite solution and 100kg of potassium permanganate are slowly added, stirred and heated to 90-95 ℃, diluted with water and cooled to 60 ℃ after the feeding is completed, filtered and washed with water to obtain reduced green 8 original dye; 7) The original reduced green 8 dye obtained in step 6) is completely dissolved in 5 times the amount of water, then 50kg of 98% sulfuric acid and 50kg of sodium sulfite are added to it, stirred completely and heated to 90-95 ℃, kept for 1 hour, gradually cooled to below 60 ℃, filtered, washed with water to neutral, dried to obtain the final product reduced green 8 dye, and the final product yield is 86.7%. |
| use | used for dyeing cotton fiber and polyester/cotton blended fabric reduction card 2G is used for dyeing cotton and silk with good levelness and affinity, and is the main dye for dyeing grass green. It is also used for dyeing viscose and polyester-cotton blended fabrics. |
| Production method | Using 1,4,5,8-tetrachloroanthraquinone and 1-aminoanthraquinone as raw materials, the two are first condensed in the presence of copper powder, and then closed in the presence of aluminum trichloride, after oxidation, the product is obtained. The finished product is washed, filtered, dried and crushed.. Add 60kg of tetrachloroanthraquinone, 150kg 1-amino anthraquinone, 60kg of sodium carbonate (98%) and 3.5kg of copper powder (industrial products) into the drum reactor, slowly raise the temperature, raise the temperature to 220-230 ℃ within 3-4h, and keep the temperature for 2h. Stop heating, cool, and crush the material for 5 hours. Add 2000L of water to the reaction kettle, add the above materials, boil at 95-100 ℃ for 1h, then filter, wash and dry. Mix 50kg of the above condensation material, 125kg of aluminum trichloride (98%) and 25kg of fine salt powder (industrial product) for 30min, then put it into a closed-loop pot, slowly raise the temperature to 80-90 ℃, stop stirring, let it foam, raise the temperature to 130-140 ℃ by itself, stir slowly, rise the temperature to 170-180 ℃, keep it for 30min, put it into a diluted pot with 1200L of water, boil at 100 ℃ for 30min, filter and wash with water. Add 1000L of water, 275kg of sulfuric acid (98%) and two batches of closed-loop materials (beating with water for about 600-800L), then add 180L of sodium dichromate solution (50%, dry product mass for about 90kg), raise the temperature to 100-102 ℃, and keep the temperature for 3 hours. Use potassium iodide test paper for testing at any time. If the oxidant is insufficient, 20-30L sodium dichromate solution can be added each time. After the reaction is over, filter at 80°C, wash with water to be neutral, and grind and dry to obtain the finished product. |
Last Update：2024-04-10 22:29:15
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View History
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