EP 0879211 A1 19981125 - MANUFACTURE OF VERY LOW ARSENIC HYDROGEN FLUORIDE
Title (en)
MANUFACTURE OF VERY LOW ARSENIC HYDROGEN FLUORIDE
Title (de)
HERSTELLUNG VON WASSERSTOFFFLUORID MIT EINEM SEHR NIEDRIGEN ARSENGEHALT
Title (fr)
PRODUCTION DE FLUORURE D'HYDROGENE A TRES FAIBLE TENEUR EN ARSENIC
Publication
Application
Priority
- US 9617924 W 19961108
- US 55565995 A 19951113
Abstract (en)
[origin: WO9718158A1] The invention provides a process for the preparation of hydrogen fluoride having a very low arsenic level. More specifically, the invention provides a process in which industrial grade anhydrous hydrogen fluoride, or an intermediate product obtained during the hydrogen fluoride manufacturing process, is contacted with an oxidizer in order to oxidize the arsenic impurity to produce anhydrous hydrogen fluoride with a level of arsenic impurity that is at least less than two parts per billion, or aqueous hydrogen fluoride with a correspondingly low level of arsenic.
IPC 1-7
IPC 8 full level
C01B 7/19 (2006.01)
CPC (source: EP)
C01B 7/195 (2013.01)
Citation (search report)
See references of WO 9718158A1
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9718158 A1 19970522; AU 7610796 A 19970605; EP 0879211 A1 19981125; MX 9803559 A 19980930
DOCDB simple family (application)
US 9617924 W 19961108; AU 7610796 A 19961108; EP 96938820 A 19961108; MX 9803559 A 19980506