| Molecular Formula | C21H16ClN2NaO3S |
| Molar Mass | 434.5 |
| Physical and Chemical Properties | This product is light yellow crystalline powder. Soluble in water (solubility 30g/L). It is anionic and can be shared with anionic surfactants, dyes and non-ionic surfactants. Acid resistance, hard water resistance, stable to hydrosulfite, but not resistant to copper and iron ions. The color light is green and blue. It can be attached to the surface of fabric fibers, can absorb 350 nm of ultraviolet light, and has a reflected wavelength of 450 nm of blue light, so yellowing fabric can be compensated by its reflected blue light. You can get a white and pleasing whitening effect. |
| Use | This product is mainly used for whitening wool, silk, and nylon. The whitening treatment should be carried out in a neutral to weakly acidic medium. It can also be used in peroxide, peracetic acid bleaching baths or resin finishing baths. |
1. Dissolve 195kg of sodium p-aminobenzenesulfonate in water, transfer it into a reaction kettle, add hydrochloric acid, cool it to 0 ℃ with ice water, and then start adding a 30% aqueous solution of sodium nitrite. Perform diazotization reaction at 0-5 ℃.
2. Add sodium bisulfite to the dissolution tank, add water to prepare a 30% aqueous solution, and adjust the pH value to 6.2-6.7 with alkali Then add it to the diazotization solution. Heat up to 80-85 ℃. Stir for 1 hour and then add a small amount of zinc powder and diatomaceous earth. Stir for 20 minutes and filter to obtain hydrogenated diazonium salt. Then add hydrochloric acid and stir at 85-90 ℃ for 10 minutes to achieve a pH value of 1-2. Cool, filter, and dry to obtain p-sulfonic phenyl hydrazine hydrochloride.
3. Add 112kg of chlorobenzene to carbon disulfide solution, add anhydrous AlCl3294kg, heat to reflux state, slowly add 112kg of acetic anhydride dropwise for reaction for 2 hours, and evaporate out carbon disulfide and excess chlorobenzene (recovered). Acetophenone was obtained by vacuum distillation. Add 155kg of p-chloroacetophenone and 106kg of benzaldehyde to 1,4-dioxane. Under acidic conditions, the condensation reaction was carried out by heating and reflux for 6 hours to obtain styrene p-chlorobenzophenone.
4. Mix the prepared p-sulfonic phenyl hydrazine hydrochloride into an aqueous solution, stir and raise the temperature to 50 ℃. Start adding styrene p-chlorobenzophenone dropwise and gradually raise the temperature to 80-90 ℃. After feeding, keep it warm for 5 hours. Then cool, filter, wash, and dry to obtain a light yellow powder product.
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.