Assertion: sodium carbonate's use | /r/HasProperty | expensive step
Facets:
Source sentences:
text: The use of an adsorbent to remove organic matter in the trona process liquors requires special 3,028,215 Patented Apr. 3, 1962 equipment to separate the activated carbon and adsorbed organics from the trona solution and requires the use of substantial amounts of activated carbon and is therefore an expensive step in the production of soda ash from trona.