| Molecular Formula | C17H17No4 |
| Molar Mass | 299 |
| Physical and Chemical Properties | The chemical quality product is green and yellow powder, melting point 307 ℃, insoluble in water, maximum absorption spectrum wavelength 397 nm, fluorescence emission spectrum length 438 nm. It is a non-ionic surfactant. |
| Use | Use of this product for polyacrylonitrile, polyester, cellulose acetate and plastics whitening. |
1. Add 120kg of acenaphthene and 140kg of sulfinyl chloride to the reaction pot in sequence and cool to 0-5 ℃. Add 4kqAlCl3 and stir for 5 hours below 18 ℃. Distillate at 190~215 ℃/1.3kPa was collected by vacuum distillation to obtain 4,5-dichloroanaphthene, with a melting point of 165~168 ℃.
2. Add the obtained 4,5-dichloroanaphthene to 400kg chlorobenzene for heating and dissolution, then add 500kg potassium dichromate, stir and add 500kg concentrated sulfuric acid dropwise. React for about 8 hours at reflux temperature. Then, chlorobenzene is separated by steam distillation, and the residue is cooled and filtered to obtain 4,5-dichloro-1,8-naphthalene anhydride.
3. Inject the obtained 4,5-dichloro-1,8-naphthalene anhydride into a reactor containing 1500kg of methanol, add 60kg of 37% methylamine aqueous solution, reflux at 65 ℃ for 2 hours, and then cool and filter to recover methanol. The filter cake was recrystallized with benzene to obtain N-methyl-4,5-dichloro-1,8-naphthalimide (melting point 245-248 ℃). Add dichloronaphthalimide to a 235kg 25% ethanol sodium/ethanol solution, and add a small amount of anhydrous sodium acetate. Reflux at 80 ℃ for 4-5 hours. After the reaction is completed, the solvent is evaporated, and the residue is cooled and filtered to obtain the crude product. Recrystallize with acetic acid to obtain high-quality products.
This product can be used according to general industrial chemical management. 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.
120 kg acenaphthene and 140 kg thionyl chloride were sequentially added to the reaction pot and cooled to 0~5 ℃. Add 4kg AlCl3 and stir below 18 ℃ for 5 hours. The fraction at 190~215 ℃/1.3 kPa was collected by vacuum distillation to obtain 4,5-dichloroacenaphthene with a melting point of 165~168 ℃.
The obtained 4, 5-dichloroacenaphthene was added to 400 kg of chlorobenzene, heated and dissolved, then 500 kg of potassium dichromate was added, and 500 kg of concentrated sulfuric acid was added dropwise under stirring. The reaction was carried out at reflux temperature for about 8 h. Then the chlorobenzene is separated by steam distillation, and the residue is cooled and filtered to obtain 4, 5-dichloro-1, 8-naphthalene anhydride.
The obtained 4,5-dichloro -1,8-naphthalene anhydride was fed into a reactor containing 1,500kg of methanol, a 60 kg 37% formaldehyde aqueous solution was added, refluxed at 65 ℃ for 2 h, then cooled and filtered to recover methanol. The filter cake was recrystallized with benzene to obtain N-methyl -4, 5-dichloro-1, 8-naphthalenediimide (melting point 245~248 ℃). Dichloronaphthalene diimide was added to 235kg 25% sodium ethoxide/ethanol solution, and a small amount of anhydrous sodium acetate was added, and refluxed at 80 ℃ for 4~5 h. After the reaction, the solvent is steamed out, and the residue is cooled and filtered to obtain crude product. Recrystallized with acetic acid to make fine products.