The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 08, 2015
Filed:
Oct. 08, 2010
Arne Schadt, Pasching, AT;
Robert Schlesinger, Linz, AT;
Gregor Demel, Linz, AT;
Christoph Neumüller, Ennsdorf, AT;
Franz Hintermüller, Bad Leonfelden, AT;
Arne Schadt, Pasching, AT;
Robert Schlesinger, Linz, AT;
Gregor Demel, Linz, AT;
Christoph Neumüller, Ennsdorf, AT;
Franz Hintermüller, Bad Leonfelden, AT;
Casale SA, Lugano, CH;
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.