Assertion: phosphoric acid | /r/HasProperty | obtained for example
Facets:
value: from calcined morocco phosphate rock
type: LOCATION
Source sentences:
text: As a result of chemical analysis of the thus obtained sodium silicofluoride, it has been discovered that the purity of sodium silicofluoride is little influenced by the rate of addition of sodium carbonate to hydrofluosilicic acid contained in phosphoric acid and that, when phosphoric acid obtained, for example, from calcined Morocco phosphate rock is used, irrespective of the operating conditions for producing the sodium silicofluoride such as temperature and rate of addition of sodium carbonate to hydrofluosilicic acid, the purity is about and no high quality sodium silicofluoride is obtained.