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

Claim 16:
17. The method for graded utilization of fluorine and silicon resources in a phosphate ore of claim 16, wherein the activated carbon, the molecular sieve, and the modified adsorbent are regenerated by desorption of the absolute dry nitrogen gas and a mixture gas of ammonia-containing nitrogen with a volume fraction of ammonia within a range of 2% to 10%; wherein the desorption temperature is greater than 100° C. and the desorption pressure is not greater than 80 KPaA; the desorbed gas formed by the absolute dry nitrogen gas is sent to the concentrated solution of the step (4); and the desorbed gas formed by the mixture gas of the ammonia-containing nitrogen gas is sent to a tail wash section of the fertilizer production.