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The use of high-boiling solvents -mixed as heat exchange medium for thermal fission of carbamide acid esters
The use of high-boiling solvents -mixed as heat exchange medium for thermal fission of carbamide acid esters
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机译:使用高沸点溶剂-混合作为热裂化脲酰胺酸酯的热交换介质
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摘要
The use of a solvent (I) for the thermal cracking of carbamic esters (II) is claimed. (I) has a definite b.pt. (pure substance) or a narrow boiling range 10 degrees C at the operating pressure and is obtained as distillation cut of thermostable liquids. Preferably (I) is a distillation cut of commercially-available heat transfer oils, e.g. partly hydrogenated terphenyl, dibenzyltoluene, phenoxybiphenyl and o-phenoxybiphenyl. Its boiling range especially is 3 degrees C at the operating pressure. Cracking is carried out in a reactive rectification column.
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