Configuration and its use in process for synthesis of alkyl carbamates from alkyl alcohol and urea in a tubular reactor
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United States of America Patent
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Nov 26, 2019
Grant Date -
Mar 22, 2018
app pub date -
Mar 11, 2016
filing date -
Mar 13, 2015
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Abstract
The present invention discloses an improved catalyst free process for synthesis of alkyl carbamates in an integrated system comprising a tubular reactor and a striper. The process comprises reacting urea and an alcohol in said tubular reactor under autogeneous pressure; wherein said process provides >90% selectivity towards alkyl carbamate. The mixture of urea and alcohol is N fed to the tubular reactor at a particular feed rate. The tubular reactor is heated externally under autogeneous pressure to carry out a synthesis reaction producing alkyl carbamate and ammonia. The ammonia is removed from the tubular reactor by the striper. The tubular reactor and the stripper are arranged in series to reduce the equilibrium limitations of the reaction and drive the reaction in forward direction.
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