Home › Forums › Coking › DCU Sour water This topic contains 1 reply, has 2 voices, and was last updated by Evan Hyde 1 year, 2 months ago. Author Posts July 21, 2016 at 3:42 pm #22049 Hedewandro LucrediParticipant What is it the typical cyanide concentration in the DCU sour water ? Our case is 0.2 ppm of cyanides at main tower vessel and high pressure vessel. Is there any corrosion problem about cyanide ? August 19, 2016 at 2:37 pm #22473 Evan HydeKeymaster http://refiningcommunity.com/forums/topic/coking-chemical-additives/#post-22471 Author Posts You must be logged in to reply to this topic.