| http://www.w3.org/ns/prov#value | - No.: 353,813 Assignee: References Cited UNITED STATES PATENTS 85 11/1933 Bacon 423/570 79 8/1939 Barkholt 423/576 45 12/1953 Kohl et a1. 423/576 X Primary Examiner-G. O. Peters Attorney, Agent, or FirmPaul F. Hawley; Arthur McIlroy [57] ABSTRACT Claus-type processes-used in the past to recover sulfur from low H 5 acid gases have not been satisfactory because hydrocarbons and other impurities in th
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