Patent ID: 11891344
Assignee: CHTEM LIMITED
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 15:
16. The method for graded utilization of fluorine and silicon resources in a phosphate ore of claim 15, wherein the activated carbon and the molecular sieve are regenerated by desorption of absolute dry nitrogen, the activated carbon and the molecular sieve first are desorbed at a temperature within a range of 100° C. to 150° C. and a pressure within a range of 0.2 MPaA to 0.3 MPaA, and desorption gas is sent to the step (4) for concentrating the concentrated solution; and the activated carbon and the molecular sieve are then desorbed at a temperature within a range of 200° C. to 250° C. and a pressure within a range of 0.3 MPaA to 0.5 MPaA, and the desorbed gas is sent for fertilizer production.