Patent ID: 11957996
Assignee: SICHUAN NORMAL UNIVERSITY
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 5:
6. The microwave chemical method for totally extracting fluorine and rare earth from bastnaesite concentrate according to claim 5, wherein the fluorine ion selective electrode method comprises the specific operating steps as follows: accurately transferring 1 mL of a fixed-volume NaF-containing leaching solution into a 100 mL volumetric flask by using a 1 mL pipette; accurately transferring 10 mL of a fixed-volume fluorine-containing leaching solution into a 100 mL polytetrafluoroethylene beaker; then adding 10 mL of a total ionic strength buffer solution, mixing with the above solution, placing the polytetrafluoroethylene beaker on a magnetic stirrer, stirring at a rotating speed of 200 r/min for 2 min, and determining the F content by using a fluorine ion selective electrode and calculating a fluorine recycling rate according to formula (1)

η1=(C1V1/w1m)×100%  (1)

wherein η1 is the recycling rate of fluorine in %; C1 is the fluorine concentration in the leaching solution in g/L; V1 is the volume of the leaching solution in L; w1 is fluorine content percentage in bastnaesite concentrate in w(wt %); and m is the mass of bastnaesite concentrate in g.