SYNTHESIS OF SEMICARBAZIDE

PURPOSE: A synthesis process for producing semicarbazide is disclosed to accomplish high yield and save the production cost. The semicarbazide is a compound generally known as a raw material of the azo dicarbon amide. CONSTITUTION: A synthesis process for producing semicarbazide comprises to prepare...

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Bibliographic Details
Main Authors LEE, TAE GYEONG, SHIN, MIN SEUNG, HAN, SANG JIN, LEE, JUN HYEOK
Format Patent
LanguageEnglish
Korean
Published 15.01.2001
Edition7
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:PURPOSE: A synthesis process for producing semicarbazide is disclosed to accomplish high yield and save the production cost. The semicarbazide is a compound generally known as a raw material of the azo dicarbon amide. CONSTITUTION: A synthesis process for producing semicarbazide comprises to prepare a desired amine halide generated by the reaction of metal hypohalogen compound and ammonia. The amine halide can be obtained by the reaction of a halogen element and 10-30% ammonia solution. Herein, the halide contains 1-200 mole of the ammonia to the halogen part. The obtained amine halide is reacted with urea in a molar ratio of 1:1-5, preferably, 1:1-3. The synthesis process of semicarbazide is performed at less than 30 deg.C and under a pressure of 5-10kgf/cm¬2. The halogen component contained in the semicarbazide is selected from chlorine, fluorine, bromine and iodine.
Bibliography:Application Number: KR19990024773