Material for a plant for the production of anhydrous formic acid
2000
The invention concerns a device and a method for obtaining anhydrous or substantially anhydrous formic acid. Said device is partly or totally made of a zirconium-free material. A liquid material of general formula (I) is used as extracting agent, wherein radicals R and R represent alkyl, cycloalkyl, aryl or aralkyl groups or R and R together form with the N atom a heterocyclic five or six-membered ring and in which only one of the radicals is an aryl group and in which R stands for hydrogen or a C1-C4-alkyl group. The device comprises the following: (i) a synthesis reactor (6); (ii) a hydrolysis reactor (1); (iii) a first distillation device (2); (iv) a second distillation device (4); (v) an extraction device (3) and (vi) a third distillation device (5).
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