The invention discloses a method for preparing hexyl-didecyl
phosphorus oxide. The method comprises the following steps: adding didecyl
phosphorus oxide, 1-
hexene and di-tert-butyl
peroxide in a PTFE(
Polytetrafluoroethylene) reaction kettle, adding a small amount of industrial mixed
decene, stirring and dissolving, rising the temperature to be 130 to 140 DEG C, reacting for 12 to 36 hours, detecting and completely reacting under <31>P-NMR (
Nuclear Magnetic Resonance), adding 5 to 15 weight percent of diluted
hydrochloric acid in a reaction solution for carrying out demulsifying and washing, extracting by using trichloromethane, washing an
organic layer to be neutral by using water, evaporating to remove trichloromethane and unreacted olefin through a
rotary evaporator, recrystalizing by using
ethanol, filtering, and carrying out
vacuum drying, thus obtaining white
solid. The method for preparing hexyl-didecyl
phosphorus oxide, disclosed by the invention, is simple in steps, is green and
environmentally friendly and is good in
atom economy, a product is high in purity, separation is easy, and an industrial prospect is obtained; the product is applied to industries of water qualitydetection and
sewage treatment.