申请人:Schaub Thomas
公开号:US20120157711A1
公开(公告)日:2012-06-21
The present invention relates to a process for preparing formic acid by reacting carbon dioxide (
1
) with hydrogen (
2
) in a hydrogenation reactor (I) in the presence of
a catalyst comprising an element of group 8, 9 or 10 of the Periodic Table,
a tertiary amine comprising at least 12 carbon atoms per molecule and
a polar solvent comprising one or more monoalcohols selected from among methanol, ethanol, propanols and butanols,
to form formic acid/amine adducts as intermediates which are subsequently thermally dissociated,
where a tertiary amine having a boiling point which is at least 5° C. higher than that of formic acid is used and
a reaction mixture comprising the polar solvent, the formic acid/amine adducts, the tertiary amine and the catalyst is formed in the reaction in the hydrogenation reactor (I) and is discharged from the reactor as output (
3
).
本发明涉及一种制备甲酸的方法,通过在氢化反应器(I)中,在存在一种催化剂,该催化剂包含周期表第8、9或10族元素,一种含有每个分子至少12个碳原子的三级胺和一种极性溶剂,所述极性溶剂包括从甲醇、乙醇、丙醇和丁醇中选择的一种或多种单醇,将二氧化碳(1)与氢气(2)反应,形成甲酸/胺加合物作为中间体,随后进行热解离,其中使用沸点比甲酸高至少5°C的三级胺,反应混合物包括极性溶剂、甲酸/胺加合物、三级胺和催化剂,在氢化反应器(I)中形成,并作为输出(3)从反应器中排出。