Invention Grant
- Patent Title: Method for the manufacture of concentrated phosphorus acid
- Patent Title (中): 浓磷酸的制造方法
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Application No.: US12989329Application Date: 2009-04-24
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Publication No.: US08728427B2Publication Date: 2014-05-20
- Inventor: Patrick Notté , Albert Devaux
- Applicant: Patrick Notté , Albert Devaux
- Applicant Address: CH Zug
- Assignee: Straitmark Holding AG
- Current Assignee: Straitmark Holding AG
- Current Assignee Address: CH Zug
- Agency: Husch Blackwell LLP
- Agent Samuel Digirolamo
- Priority: EP08155197 20080425
- International Application: PCT/EP2009/054998 WO 20090424
- International Announcement: WO2009/130321 WO 20091029
- Main IPC: C01B25/16
- IPC: C01B25/16
Abstract:
A method for the manufacture of concentrated phosphorous acid starting from pure P4O6 is disclosed. The P4O6 is hydrolyzed, preferably under stirring in water in the presence of a homogeneous Broensted acid catalyst while maintaining in the hydrolysis/reaction medium a pH below 5 whereby the free water level, at the completion of the hydrolysis, is in the range from 0 to 40%.
Public/Granted literature
- US20110085959A1 METHOD FOR THE MANUFACTURE OF CONCENTRATED PHOSPHORUS ACID Public/Granted day:2011-04-14
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