Preparation of formic acid by thermal cleavage of

专利名称：Preparation of formic acid by thermal

cleavage of quaternary ammonium formates

发明人：Hans Kiefer,Leopold Hupfer,Ferdinand

Lippert

申请号：US08/041048申请日：19930331公开号：US05294740A公开日：19940315

摘要：A process for preparing formic acid by thermal cleavage of quaternaryammonium formates of the general formula I ##STR1## where R. sup.1, R.sup. 2 andR.sup.3 are C.sub.1 - to C.sub.14 -alkyl, C.sub.3 - to C.sub.8 - cycloalkyl, aryl or C.sub.7 - toC.sub.16 -aralkyl, or together are 1,4- or 1,5-alkylene which is unsubstituted or

substituted one to four times by C.sub.1 -to C.sub.4 -alkyl, with the proviso that the sumof the carbon atoms of R.sup.1, R.sup.2 and R.sup.3 in the quaternary ammonium formatesI is 7 to 40,

comprises carrying out the cleavage in the presence of secondary formamides of thegeneral formula II ##STR2## where R.sup.4 and R.sup.5 are C.sub.2 - to C. sub.10 -alkyl, C.sub.3 - to C.sub.8 -cycloalkyl, aryl or C.sub.7 - to C. sub.16 -aralkyl, or together are 1,4- or1,5-alkylene which is unsubstituted or substituted one to four times by C.sub.1 - toC.sub.4 - alkyl,

< P>which formamides boil 30° to 150° C. lower than the tertiary amine of the generalformula III ##STR3## where R. sup.1, R.sup.2 and R.sup.3 have the abovementionedmeanings, contained in the formate I.

申请人：BASF AKTIENGESELLSCHAFT

代理机构：Keil & Weinkauf

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