Assertion: hydrogen fluoride | /r/HasProperty | purified
Facets:
value: by distillation
type: MANNER
value: by a suitable known method
type: MANNER
value: to some extent
type: OTHER
Source sentences:
text: Hydrogen fluoride having a high impurity content is first purified to some extent by a suitable known method, for example, by distillation, and is then purified by the present process.
text: Hydrogen fluoride existing in the gas phase is preferably recovered to be purified and separated as the aimed product.
text: Hydrogen fluoride thus generated can be obtained in the gas phase, and is preferably recovered to be purified and separated as the aimed product.
text: It is advantageous for carrying out the process according to the invention for the oxygen difluoride to be well mixed with the hydrogen fluoride to be purified.
text: The hydrogen fluoride to be purified can also be contacted in the gas phase with oxygen difluoride at temperatures of from 20° to 200° C. and at atmospheric pressure.
text: Alternatively, the hydrogen fluoride to be purified can contacted in the gas phase with oxygen difluoride at pressures below one atmosphere.
text: The hydrogen fluoride to be purified contained a concentration of 22 ppm arsenic in the form of arsenic compounds.