????? ?????? ????? ?????

????? Phosphotungstic ????? ??? ????? ??? ?????? ?????? phosphotungstic ????? ????? ??? ???, ???? ????? ?? ???????? ????? ?????? ?????, ?? ???? ??? ???? ??????? ?????.

????? Phosphotungstic ????? ???? Catalyst ?????

1. ????? Phosphotungstic ????? ??? ????? ???? ?????? ?????????? desulfurization ?????, ????? ???? ?? ?? ???? 30% ???, ????? ??? ???? 25 ~ 70 ℃ ???? 0.5 ~ 3.0 ????. ???? ??????, ?????? ?? ???? ?????? ???? ????? desulfurization.

2. ???? maleimide ? ?????? ??????, ?? ?? ???????? ?? ?? ????? ????? ????? ?? ????? ????.

3. ??? ????? ?? ?????? ???? ????? phosphotungstic ????? ??? ????? ????, ??? ???? ??? 250 ℃, ????? ????? ?????? ?????? ??????? ??????? ?? ?????? ?????? ???, ????? ????? ????? ?????? ???? ????? 48.49%, ??? ????? ????, ??? ????????? ??????? ????? ???? ?? ????? ?????? ???"?.

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