Assertion: phosphoric acid's use | /r/MadeOf | the percolation technique
Facets:
Source sentences:
text: A further preferred feature of the present invention provides for use to be made of the percolation technique, which provides for a coarse-grained adsorbent, e.g. particulate active carbon or compacted carbon black, to be impregnated with a liquid diorganyldithiophosphoric acid ester and for the resulting mixture to be placed in a column.