52632-06-1Relevant academic research and scientific papers
ISOCYANATE PRODUCTION METHOD
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Paragraph 0434-0443; 0445-0450; 0453-0457; 0460; 0462; 0479, (2020/05/02)
An isocyanate production method according to the present invention is a method in which an isocyanate is produced by subjecting a carbamate to thermal decomposition, and includes: a step of preparing a mixture liquid containing the carbamate, an inactive solvent and a polyisocyanate compound; a step of conducting a thermal decomposition reaction of the carbamate by continuously introducing the mixture liquid into a thermal decomposition reactor; a step of collecting a low-boiling decomposition product by continuously extracting the low-boiling decomposition product in a gaseous state from the reactor, the low-boiling decomposition product having a boiling point lower than the polyisocyanate compound; and a step of collecting a high-boiling component by continuously extracting, from the reactor, a liquid phase component which is not collected in a gaseous state at the step of collecting the low-boiling decomposition product.
Novel hydrazinocarboxamide derivatives and preparation thereof
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, (2008/06/13)
α-Hydrazinocarboxamide and α-(α'-acylhydrazino)-carboxamide derivatives of formula I STR1 in which R1 and R2 each are lower alkyl or R1 and R2 together with the nitrogen atom to which they are joined form a pipe
