公开(公告)号：US4076594A

公开(公告)日：1978-02-28

申请号：US729858

申请日：1976-10-04

申请人： Horst Buelow ,  Heinz Hohenschutz ,  Johannes E. Schmidt ,  Werner Sachsze

发明人： Horst Buelow ,  Heinz Hohenschutz ,  Johannes E. Schmidt ,  Werner Sachsze

IPC分类号： C07C53/02 ,  C07C51/00 ,  C07C51/44 ,  C07C51/48 ,  C07C67/00 ,  B01D3/40

CPC分类号： C07C51/44 ,  C07C51/48

摘要： Formic acid is purified by extractive distillation of its aqueous solutions using a basic extractant, followed by distillation of the bottom mixture first obtained, the extractant used being N-formylmorpholine.

摘要翻译： 甲酸通过使用碱性萃取剂萃取蒸馏其水溶液进行纯化，然后蒸馏首先获得的底部混合物，所用萃取剂为N-甲酰基吗啉。

公开(公告)号：US4551208A

公开(公告)日：1985-11-05

申请号：US614280

申请日：1984-05-25

申请人： Kaspar Bott ,  Gerd Kaibel ,  Horst Hartmann ,  Rudolf Irnich ,  Horst Buelow

发明人： Kaspar Bott ,  Gerd Kaibel ,  Horst Hartmann ,  Rudolf Irnich ,  Horst Buelow

IPC分类号： C07C53/02 ,  C07C51/00 ,  C07C51/44 ,  C07C67/00 ,  B01D3/34

CPC分类号： C07C51/44

摘要： Formic acid is recovered, by distillation, from its mixtures with solvents of the general formula I ##STR1## where R.sup.1 is hydrogen, methyl, ethyl or vinyl and R.sup.2 and R.sup.3 are each alkyl, cycloalkyl, aryl or aralkyl, or R.sup.2 and R.sup.3 together form a 1,4- or 1,5-alkylene group, in each case of not more than 8 carbon atoms, with the provisos that the sum of the number of carbon atoms in R.sup.2 and R.sup.3 is 7 to 14 and that only one of these radicals is aryl, by a method in which the distillation is carried out in the presence of a carboxamide II which is selected from the group consisting of formamide, acetamide, propionamide and the same compounds substituted by N-methyl or N,N-dimethyl, and which has a boiling point lower than that of the solvent I.

摘要翻译： 通过蒸馏从其与通式I的溶剂的混合物回收甲酸，其中R1是氢，甲基，乙基或乙烯基，R2和R3各自是烷基，环烷基，芳基或芳烷基，或R2和R3 一起形成1,4-或1,5-亚烷基，每种情况下不超过8个碳原子，条件是R2和R3中碳原子数之和为7〜14，只有一个 这些基团是芳基，其中蒸馏在选自甲酰胺，乙酰胺，丙酰胺和与N-甲基或N，N-二甲基甲酰胺取代的相同化合物的羧酰胺II存在下进行， 二甲基，其沸点低于溶剂I.