Patent ID: 7927513

Claim:
A method of treating a hot syngas stream for conversion to chemical products by removing particulates, ammonia and COS from the hot syngas stream comprising the steps of: passing the hot syngas stream to a scrubber; adding an acidic solution comprising a purge water to a circulating scrubber water; capturing ammonia, COS and particulates in the circulating scrubber water and condensing water from the hot syngas stream into the circulating scrubber water; withdrawing a scrubber waste water effluent from the scrubber comprising absorbed COS, ammonia and particulates from the scrubber; withdrawing a treated syngas stream effluent from the scrubber having a reduced concentration of COS, ammonia and particulates; and, converting the treated syngas stream to chemical products in a process that produces at least a portion of the purge water.