Polyphosphoric acid calcium magnesium fertilizer, polyphosphoric acid calcium magnesium fertilizer prepared by using phosphoric acid and phosphorus tailings as raw material and preparation method therefor

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United States of America Patent

PATENT NO 11787748
APP PUB NO 20210032173A1
SERIAL NO

17043752

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Abstract

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The present invention relates to a polyphosphoric acid calcium magnesium fertilizer prepared by using phosphoric acid and phosphorus tailings as raw materials and a preparation method therefor. The polyphosphoric acid calcium magnesium fertilizer is prepared by using phosphorus tailings and phosphoric acid as raw materials. Based on P2O5, MgO and CaO, in the polyphosphoric acid calcium magnesium fertilizer: total phosphorus is 50-68%, effective phosphorus is 47-66%, total magnesium is 5-18%, effective magnesium is 4-15%, total calcium is 11-20%, effective calcium is 10-18%, and all are expressed in mass percentage. Based on P2O5, the polymerization rate of the polyphosphoric acid calcium magnesium fertilizer is ≥50%. The present invention also provides a preparation method for the fertilizer. The phosphorus in the product prepared by the invention has sustained-release properties. The fertilizer is well suited for crops requiring large amounts of calcium and magnesium.

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Patent Owner(s)

Patent OwnerAddress
KINGENTA NORSTERRA CHEMICAL CO LTD550400 WENG'AN INDUSTRIAL PARK QIANNAN BUYI AND MIAO AUTONOMOUS PREFECTURE GUIZHOU PROVINCE QIANNAN GUIZHOU PROVINCE 550400
KINGENTA ECOLOGICAL ENGINEERING GROUP CO LTD276700 XINGDA WEST STREET LINSHU COUNTY LINYI CITY SHANDONG PROVINCE NO 19 LINYI CITY SHANDONG PROVINCE 276700
YUNNAN ZHONGZHENG CHEMICAL INDUSTRY CO LTDERJIE INDUSTRIAL PARK JINNING DISTRICT KUNMING YUNNAN 650608

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Guo, Zongduan Shandong, CN 1 0
Hu, Shanming Shandong, CN 1 0
Hu, Zhaoping Shandong, CN 3 0
Li, Chengzhi Shandong, CN 13 44
Liu, Yongxiu Shandong, CN 5 4
Wang, Botong Shandong, CN 1 0
Yu, Nanshu Shandong, CN 1 0
Zheng, Jianguo Shandong, CN 7 4

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