| 摘要 |
A process for preparing hydrogen fluoride that involves treating anhydrous hydrogen fluoride containing primarily trivalent arsenic impurities with a sulfur compound capable of providing sulfide ions (e.g., H2S) so as to precipitate the arsenic (i.e., as As2S3) followed by separation and recovery (e.g., by distillation or filtration) of purified anhydrous hydrogen fluoride. |
