Method for production of ammonium phosphate from phosphate rock slurry

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United States of America

PATENT NO 11261088
APP PUB NO 20210114878A1
SERIAL NO

17033788

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Abstract

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A method for production of ammonium phosphate from phosphate rock slurry. The method includes: introducing flue gas containing SO2 into 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.

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Patent Owner(s)

Patent OwnerAddress
KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGYCHENGGONG CAMPUS KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY KUNMING YUNNAN 650500

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cao, Rui Kunming, CN 189 926
Chen, Peng Kunming, CN 395 2298
Ma, Yixing Kunming, CN 6 11
Ning, Ping Kunming, CN 25 2
Tian, Senlin Kunming, CN 12 1
Wang, Langlang Kunming, CN 3 0
Wang, Xueqian Kunming, CN 5 5
Zhang, Yingjie Kunming, CN 62 316

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