Title: Purifying process of phosphoric acid produced via wet process
Application Number: 02133869 Application Date: 2002.09.28
Publication Number: 1403367 Publication Date: 2003.03.19
Approval Pub. Date: Granted Pub. Date: 2004.05.26
International Classifi-cation: C01B25/234
Applicant(s) Name: Yunnan Sanhuan Chemical Co., Ltd. Address: 650113
Inventor(s) Name: Ta Shenghua, Lu Qingsheng
Attorney & Agent: zhan xihan wang min
Abstract:
     The present invention is the purifying process of phosphoric acid produced via wet process. The purifying process includes heat exchanging cooling and aging crystallization, and via the process, the impurity ion can separated completely and the deposited salt has large crystal grain for separation. The clarified bottom flow is solid-liquid separated with depositing centrifugal machine. The wet process phosphoric acid product has P2O5 greater than 52.0 %, Fe2O3 Al2O3 less than 2.5 %, SS less than 1.0% and MgO less than 1.0%.
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