发明授权
- 专利标题: Process for the dearsenication of polyphosphoric acid
- 专利标题(中): 多磷酸脱砷的方法
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申请号: US514450申请日: 1974-10-15
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公开(公告)号: US3991164A公开(公告)日: 1976-11-09
- 发明人: Wolfgang Scheibitz , Hasso Spott , Gero Heymer
- 申请人: Wolfgang Scheibitz , Hasso Spott , Gero Heymer
- 申请人地址: DT Frankfurt am Main
- 专利权人: Hoechst Aktiengesellschaft
- 当前专利权人: Hoechst Aktiengesellschaft
- 当前专利权人地址: DT Frankfurt am Main
- 优先权: DT2352827 19731020
- 主分类号: C01B25/24
- IPC分类号: C01B25/24 ; C01B21/16
摘要:
Polyphosphoric acid is dearsenicated by placing the polyphosphoric acid in a reactor; adding a phosphorus oxo-compound containing phosphorus in the monovalent or trivalent electropositive oxidation stage; heating the resulting mixture to effect disproportionation of the phosphorus oxo-compound; and removing the resulting off-gas having arsenic therein.
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