| http://www.w3.org/ns/prov#value | - For removal of carbonyl sulfide, mercaptans, and other sulfur compounds from liquid n-alkanes, U.S. Pat. No. 4,098,684 discloses the use of combined beds of molecular sieves 13X and 4A. EP 0 781 832 discloses zeolites of types A, X, Y and MFI as adsorbents for hydrogen sulfide and tetrahydrothiophene in natural gas feed streams.
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