The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 2022
Filed:
Sep. 26, 2020
Kunming University of Science and Technology, Kunming, CN;
Ping Ning, Kunming, CN;
Rui Cao, Kunming, CN;
Xueqian Wang, Kunming, CN;
Senlin Tian, Kunming, CN;
Yixing Ma, Kunming, CN;
Langlang Wang, Kunming, CN;
Yingjie Zhang, Kunming, CN;
Peng Chen, Kunming, CN;
KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY, Kunming, CN;
Abstract
A method for production of ammonium phosphate from phosphate rock slurry. The method includes: introducing flue gas containing SOinto a phosphate rock slurry, to yield an absorption solution; evaporating waste ammonia water containing 10-20 wt. % ammonia to yield ammonia gas; introducing the ammonia gas into the absorption solution at a temperature of 110-135° C. until a neutralization degree of the absorption solution reaches 1.5-1.6, thus yielding an ammonium phosphate solution and calcium sulfate; separating the calcium sulfate from the ammonium phosphate solution; and introducing the ammonium phosphate solution to a granulator for granulation to yield ammonium phosphate granules; drying and sieving the ammonium phosphate granules, thereby yielding ammonium phosphate.