| Molecular Formula | C44H34N12Na2O6S2 |
| Molar Mass | 936 |
| Physical and Chemical Properties | The chemical product is a light yellow powder. The spectral absorption peak wavelength is 356 nm and the fluorescence emission wavelength is 452 nm. Soluble in water, anionic. |
| Use | This product is used for fabric whitening treatment, mainly for cotton, hemp, polyamide fiber whitening. It can also be used as a bleaching detergent. |
1. Add 188kg of DSD acid into the batching tank, add an appropriate amount of water and Na2CO3 to form a 10% DSD sodium salt solution.
2. Put 185kg of cyanuric chloride into the first condensation kettle, add an appropriate amount of water and a small amount of emulsifier (sodium lignosulfonate), stir evenly, cool to 5-10C, and add the prepared DSD sodium acid aqueous solution dropwise. And adjust the pH value with Na2CO3 at any time to maintain it between 6 and 7. After the reaction reaches the end point, it is transferred to the second condensation kettle, and 186kq aniline and an appropriate amount of alkali are added to react at 40 ℃ for 2 hours. The reaction is then heated to 80 ℃ for 1.5 to 2 hours. Then adjust the pH value to 11~12. Heat up to 130 ℃ and react for 1.5 hours. Add salt to precipitate. Filter, add proper amount of sodium dodecyl benzene sulfonate and a small amount of emulsifier into the filter cake for grinding, grind to a certain fineness, and then spray dry to obtain commercial fluorescent whitening agent SBA.
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 188kg DSD acid into the ingredient tank, and add appropriate amount of water and Na2CO3 to prepare a 10% sodium DSD acid salt aqueous solution.
Put 185 kg of cyanuric chloride into the first condensation kettle, add appropriate amount of water and a small amount of emulsifier (sodium lignosulfonate), stir evenly, cool to 5~10 ℃, drop the prepared sodium DSD acid aqueous solution, and adjust the pH value with Na2CO3 at any time to maintain it between 6 and 7. After the reaction reaches the end point, it is put into a second condensation kettle, 186 kg of aniline and an appropriate amount of alkali are added to react at 40 ℃ for 2 h, then the temperature is raised to 80 ℃, and the reaction is 1.5~2 h. Then adjust the pH value to 11~12. Raise the temperature to 130 ℃ for 1.5 h. Add salt, precipitate, filter, add appropriate amount of sodium dodecyl benzene sulfonate and a small amount of emulsifier to the filter cake for grinding, grinding to a certain fineness and spray drying to obtain commercial fluorescent whitening agent SBA.