???? ??????? Metatungstate ????? ???? ??????
??? ?????? ?????? ????, ????? ?????? ?? ??? ??????? ???? ???? ??????. ???????? ??????? - trioxide ??????? ???? ???? ?? ???. ??????, ?????? ????????? ?? ?? ??? ???????? ??? metatungstate ??????? ??? ????? ?? ?????? ?? AMT ????? ????????.
?????????? ???-???? ??? ????????? ????? ???? ????? ?????????? ??? ?????, ??? ????? ?? ????????? ??? ????? ???? ????. ????, ?????????? ???-???? ????? ????????? ??? ????? ???? ?????? ???? ?????? ?? ??, ?????? ????? ???? ??????.
?????? - nanofiltration - ??????? ????? ????? metatungstate ??????? ???? ????:
1) ????? ????? ?????? ????? ????? ??????? metatungstate: ?????? ????? ?????? ???? ???? ????? paratungstate ???????. ??? ???? ??????? ???????? ??????, ??????? paratungstate ???? ?????? metatungstate ???????. 2) Nanofiltration ?? ????? ????? AMT. ??? ?????? AMT ??? ????? ?????, ???? ????? ?????, ????? metatungstate ??????? ???? ???? ?????. 3) ????? ??????? ?? ????? AMT.????? ????? ??? ??? ????? ??? ????? ????? ??????? metatungstate ???? ?????, ??? ???? ????? ????? AMT ???? ????, ?????? ?? ????? ???? ????? ????? ????? ????? ?????.
?????? ??????:
???? ?????? ??????? ????? ??? 2.72 (?? W18O49), ??? ??? ??? ?? ?????? ???????, ????? VTO, ??? ???? ????? ???? ????, ??? ???? ???? ??? ?? ???? ????.
Sodium tungstate is mainly used for the preparation of ammonium paratungstate and the depth of preparation of tungsten trioxide, cemented carbide, tungsten, ammonium tungstate, tungstic acid and other tungsten compounds used in petrochemicals, inks and so on.
??????? paratungstate ??? ???? ????, ????? ?????? ?????, ???? ??? ????? ?? ?????? ?? ??????????? ???? ????? ?? trioxide ??????? ?? ???? ??????? ?????? ???? ??????? ????.
????? Tungstic ?????? ?????? ????????? ?? ??????? trioxide, WO3. ????? ?????? ?????, ?monohydrate, ??? WO3. h2o, dihydrate ?? 3.2 h2o ???? ??. . ???? ???? ????? ?? WO3 H2O ????? ????? ?? octahedrally ????? WO5 (H2O) ?????? ??? 4 ???????? ???????.
0.6 ??????? ??????? ??????, ?????? ???????, ????? ?? ???? ????? ??????, ????? ????????? ????, ?????? ?????? ?? 0.6-1.0 g/cm3.
?????? ??????? ???? ?????? ????? ?? ??????? ?????? ??? ????? ????? ??????? ?????? ?? ??????? (VI) ? ??????? (V). ????? ??? ???? ????? ???.