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REMOVAL OF LOW BOILERS AND REDUCTION OF THE AMMONIA CONTENT IN ISOPHORONEDIAMINE BY PARTIAL CONDENSATION
REMOVAL OF LOW BOILERS AND REDUCTION OF THE AMMONIA CONTENT IN ISOPHORONEDIAMINE BY PARTIAL CONDENSATION
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机译:通过部分冷凝去除低沸物并降低异丙肾上腺素中氨的含量
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摘要
The present invention is directed to a process for fine purification of isophoronediamine from the production of isophoronediamine wherein the crude isophoronediamine I is subjected to a fine purification by means of two vacuum distillation columns, wherein I. in the first vacuum distillation column K I low-boiling by-products still present are removed, and a crude IPDA II is transferred from the bottom of K I into the vacuum distillation column K II, II. and in the second vacuum distillation column K II the isophoronediamine is obtained in pure form overhead and separated from the organic residues, wherein the first condenser is a partial condenser and the pure IPDA is removed therein, and wherein the second condenser is a total condenser and the residual portion of the vapor stream from K II is completely condensed therein and recycled as return stream into the first vacuum distillation column K I.
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