Organic bases catalyze the synthesis of urea from ammonium salts derived from recovered environmental ammonia.
Abstract
Ammonia from sewage and livestock manure is a major environmental pollutant. To consume environmental ammonia, we investigated the organic base-catalyzed synthesis of urea. 1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) catalyzes the conversion of ammonium carbamate to urea in 35% yield at 100 °C. Moreover, DBU also converts other ammonium salts into urea. A mechanism that involves nucleophilic attack of ammonia following ion exchange is proposed.
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97518
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0x95644003c57E6F55A65596E3D9Eac6813e3566dA
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97518
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10.1038/s41598-020-59795-6
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Scimatic Chain (ID: 481)
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