发明名称 |
Improved process for the manufacture of phosphoric acid |
摘要 |
Process for the manufacture of superphosphoric acid. Process by concentration of phosphoric acid under vacuum in two stages according to which in each stage a pressure equal to or greater than 0.35 bar is maintained in the exchanger to that of the evaporating round-bottom flask. Application to the manufacture of superphosphoric acid which has a concentration in the region of 70 %.
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申请公布号 |
FR2567503(A2) |
申请公布日期 |
1986.01.17 |
申请号 |
FR19840011154 |
申请日期 |
1984.07.13 |
申请人 |
CDF CHIMIE AZOTE FERTILISANTS |
发明人 |
PIERRE SANCHEZ ET PIERRE LAUDAT;LAUDAT PIERRE |
分类号 |
C01B25/24;(IPC1-7):C01B25/234 |
主分类号 |
C01B25/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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