Invention Grant
US08759569B2 Process for the production of isocyanates, preferably diisocyanates and polyisocyanates with solvent recirculation
有权
制备异氰酸酯，优选二异氰酸酯和多异氰酸酯与溶剂再循环的方法
- Patent Title: Process for the production of isocyanates, preferably diisocyanates and polyisocyanates with solvent recirculation
- Patent Title (中): 制备异氰酸酯，优选二异氰酸酯和多异氰酸酯与溶剂再循环的方法
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Application No.: US13380680Application Date: 2010-06-16
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Publication No.: US08759569B2Publication Date: 2014-06-24
- Inventor: Heiner Schelling , Ulrich Penzel , Eckhard Stroefer , Matthias Eiermann , Jon S. Speier , Kai Thiele , Michael Bock
- Applicant: Heiner Schelling , Ulrich Penzel , Eckhard Stroefer , Matthias Eiermann , Jon S. Speier , Kai Thiele , Michael Bock
- Applicant Address: DE Ludwigshafen
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- International Application: PCT/EP2010/058421 WO 20100616
- International Announcement: WO2010/149544 WO 20101229
- Main IPC: C07C263/00
- IPC: C07C263/00
Abstract:
The present invention relates to a process for the production of isocyanates, preferably diisocyanates and polyisocyanates of the diphenylmethane series (MDI), by reacting an amine with phosgene in the liquid phase or in the gas phase to form the corresponding isocyanates, subsequent removal of the solvent in at least two steps to obtain at least two solvent streams, individual treatment of the at least two solvent streams, and recirculation of at least a portion of the solvent streams.
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