Invention Grant
- Patent Title: Water recycling in a melamine production process
- Patent Title (中): 三聚氰胺生产过程中的水回收
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Application No.: US13500950Application Date: 2010-10-08
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Publication No.: US09206140B2Publication Date: 2015-12-08
- Inventor: Arne Schadt , Robert Schlesinger , Gregor Demel , Christoph Neumüller , Franz Hintermüller
- Applicant: Arne Schadt , Robert Schlesinger , Gregor Demel , Christoph Neumüller , Franz Hintermüller
- Applicant Address: CH Lugano
- Assignee: Casale SA
- Current Assignee: Casale SA
- Current Assignee Address: CH Lugano
- Agency: The Webb Law Firm
- Priority: EP09172664 20091009
- International Application: PCT/EP2010/065080 WO 20101008
- International Announcement: WO2011/042532 WO 20110414
- Main IPC: C07D251/60
- IPC: C07D251/60 ; C07D251/62

Abstract:
The present invention relates to a method for recycling water in a melamine production process comprising—a wet process comprising the steps of aqueous treatment of a melamine melt from a melamine synthesis plant with an aqueous alkali containing solution and crystallization for producing solid melamine and a triazine containing alkaline mother liquor,—a wastewater treatment process comprising the steps of thermal treatment of said triazine containing alkaline motor liquor, and—a recycling process, whereby at least parts of the thermally treated alkaline mother liquor are being recycled to the wet process.
Public/Granted literature
- US20120271050A1 Water Recycling in a Melamine Production Process Public/Granted day:2012-10-25
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