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专利名称：Process for the preparation of a substituted
triazine
发明人：Colby, Thomas Harold,Freitas, Ernest
Robert,Durland, William Ross
申请号：EP79200023.4申请日：19790112公开号：EP0003374B1公开日：19810812
摘要：A process for the preparation of 2-chloro-4-ethylamino-6-isopropylamino-s-triazine (\"atrazine\" herbicide) in which cyanuric chloride is reacted in a first amination stepwith either isopropylamine or ethylamine to give either 2,6-dichloro-4-isopropyl-amino-s-triazine or 2,6-dichloro-4-ethylamino-s-triazine respectively, which is subsequentlyreacted in a second amination step with either ethylamine or isopropylamine respectively,both reactions being performed in a mixed acetone/water solvent and in the presence ofan acid binding agent, characterised in that in the first amination step the molar ratio ofcyanuric chloride to alkylamine is at least 1.04:1, and that subsequent to the first
amination step but prior to the second amination step. the cyanuric chloride remaining inthe reaction mixture is hydrolysed, using a sufficient quantity of a base to maintain the pHof the reaction mixture in the range of 6 to 11, to a water-soluble salt ofmonohydroxydichlorotriazine.
申请人：SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
地址：Carel van Bylandtlaan 30 2596 HR Den Haag NL
国籍：NL
代理机构：Rogers, Roy Charles
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