发明名称 |
Process for the time recovery of sulphate of potash (SOP) from sulphate rich bittern |
摘要 |
The present invention relates to a process for the recovery of sulphate of potash (SOP) from bittern. Kainite is obtained by fractional crystallization of the bittern. Kainite is converted into schoenite with simultaneous removal of NaCl and the filtrate (SEL) is used for production of KCl. Schoenite is reacted with aqueous KCl to yield SOP and the filtrate (KEL) is recycled in the kainite to schoenite conversion step. The production of KCl from SEL is carried out with the aid of dipicrylamine (DPA). Lime is treated with DPA in water for the production of highly soluble Ca (DPA)2, which in turn treated with SEL to produce insoluble K(DPA). K(DPA) is treated with HCl to produce KCl and insoluble DPA, which can be recycled for the production of Ca (DPA)2. The aqueous KCl thus obtained is treated with schoenite to prepare SOP. The KEL obtained along with SOP is recycled to generate schoenite.
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申请公布号 |
US8182784(B2) |
申请公布日期 |
2012.05.22 |
申请号 |
US20100084755 |
申请日期 |
2010.06.08 |
申请人 |
PAUL PARIMAL;GHOSH PUSHPITO KUMAR;LANGALIA KAUSHIK JETHALAL;SUBRAMANIAN PALANI SIVAGNANA;ERINGATHODI SURESH;PATRA SUBRATA;AGNIHOTRI PRAGATI;COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH |
发明人 |
PAUL PARIMAL;GHOSH PUSHPITO KUMAR;LANGALIA KAUSHIK JETHALAL;SUBRAMANIAN PALANI SIVAGNANA;ERINGATHODI SURESH;PATRA SUBRATA;AGNIHOTRI PRAGATI |
分类号 |
C01D5/00 |
主分类号 |
C01D5/00 |
代理机构 |
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