in fluid flow communication with said eighth vessel 800 said connecting end 810b is connected in fluid flow communication with a converted nitrile collection point which is not depicted a first stream which comprises isoolefins nitriles and nonreactive compounds originates from said isoolefin source said first stream exits said isoolefin source through said connecting end 110a and enters said conduit 110 said first stream exits said first conduit 110 through said connecting end 110b and enters said first vessel 100 which is said first contacting means a second stream which comprises water exits said conduit 120 through said connecting end 120a and enters said first vessel 100 said first vessel 100 is a contacting means that provides a contacting zone where said first stream can come into contact with said second stream an example of said contacting means is a wash column this contacting takes place under conditions that produce a third stream and a fourth stream from said first stream and said second stream where said third stream comprises said isoolefins and said nonreactive compounds and where said fourth stream comprises said water and said nitriles and where said third stream is lean in said nitriles when compared with said first stream and where said fourth stream is rich in said nitriles when compared with said second stream said third stream exits from said first vessel 100 through said connecting end 130a and enters said conduit 130 said third stream exits said conduit 130 through connecting end 130b and enters said connecting end 210a said fourth stream exits said first vessel 100 through said connecting end 140a and enters said conduit 140 said fourth stream exits.