| Molecular Formula | C36H32Cl2N12Na2O8S2 |
| Molar Mass | 941.70 |
| Physical and Chemical Properties | Chemical quality This product is a light yellow powder, which can be dissolved in hot water, and has good sunlight resistance and aging resistance. It is anionic. Suitable for neutral and weak basic dyes. |
| Use | This product is used for textile, paper, soap and detergent whitening, in neutral and weak alkaline conditions. |
1. Put 274kg of DSD acid into a dissolution tank, add water to dissolve, and adjust the pH value to 6-6.5 with Na2CO3. Spare.
2. Add 271kg of melamine to the condensation kettle, and then add 800kg of water containing crushed ice. Add 0.4kg of flat O at 0 ℃ and stir thoroughly. Add the backup solution dropwise and adjust the pH value to 4-4.5 using a 10% Na2CO3 aqueous solution. React for 1 hour. After reaching the endpoint, add 148kg of monoethanolamine, raise the temperature to 100 ℃, and adjust the pH value to 6-7 with Na2CO3 aqueous solution. After the reaction is completed, 166kg of o-chloroaniline is added at a reaction temperature of 30-35 ℃. Add salt to precipitate, filter, and add an appropriate amount of Na2CO3 and urea to the filter cake for kneading and drying. Add another 200kg of anhydrous sodium sulfate for mixing. Crushed to obtain fluorescent whitening agent JD-3.
This product can be managed according to general industrial chemicals. When using it, gloves and protective glasses should be worn to avoid direct contact with the skin and eyes. If it gets on the skin, rinse with water and soap. Place in a cool and dry warehouse to prevent exposure to sunlight and rain.
put 275kg DSD acid into a dissolution tank, add water to dissolve and adjust the pH value to 6~6.5 with Na2CO3. Standby.
In addition, 271 kg of cyanuric chloride was added to the condensation kettle, and then 800 kg of water containing crushed ice was added. Add 0.4kg flat and O at 0 ℃ and stir well. Add standby solution dropwise and adjust the pH value to 4~4.5 with 10% Na2CO3 aqueous solution. Reaction for 1 h. At the end point, 148 kg of monoethanolamine was added, the temperature was raised to 100 ℃, and the pH value was adjusted to 6~7 with Na2CO3 aqueous solution. After the reaction, 166 kg o-chloroaniline was added at a reaction temperature of 30~35 ℃. Add salt to salting out, filter, add appropriate amount of Na2CO3 and urea to the filter cake for kneading and drying. Add 200 kg of anhydrous sodium sulfate to mix. Crushed to obtain fluorescent whitening agent JD-3.