Molecular Formula | C7HF12KO2 |
Physical and Chemical Properties | Chemical quality This product is a white powdery solid, melting point 180~200 ℃, surface tension (0.25% aqueous solution)(45~55)× 10-3N/m, soluble in water, non-toxic. |
Use | Use as a dispersant and surfactant in the suspension polymerization of tetrafluoroethylene. |
press tetrafluoroethylene into the reactor and add methanol as a condensing agent, if it is twice the theoretical amount. Then add the initiator tert-butyl peroxide in turn, and the auxiliary initiator barium oxide. At 135~160 ℃,2.45 MPa was modified to obtain viscous telomer. Then neutralize with sodium phosphate aqueous solution to a pH of about 7. Carry out separation, evaporation and rectification. The top temperature of the tower during rectification is preferably around 60°C. The discharge temperature is 40~45 ℃. Get α,α & omega;-hydrogen-containing perfluoroheptanol.
Hydrogen-containing perfluoroheptanol was put into an oxidation kettle, potassium permanganate was added, and refluxed at 100 ℃ for 14 h for oxidation reaction. After the reaction, cooling, extraction, drying, and reduced pressure distillation to obtain & omega;-hydrogen-containing perfluoroheptanol. Neutralize with KOH aqueous solution to a pH value of about 7, concentrate, and cool to obtain crystals. Dried to white powder & omega;-Hydrofluoroheptanol.