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US06833469B2 Method for producing isocynates 失效
异氰酸酯的制备方法

Method for producing isocynates
摘要:
The invention relates to a process for the production of isocyanates by reaction of primary amines with phosgene, in which isocyanate is used as solvent, wherein some or all of isocyanate used as solvent is added to the reaction mixture only after the amine and phosgene have been physically combined.
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