FACILITY AND METHOD FOR THE PRODUCTION OF ANHYDROUS FORMIC ACID

摘要

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 of general formula (I) is used as extracting agent, wherein radicals R<1> and R<2>represent alkyl, cycloalkyl, aryl or aralkyl groups or R<1> and R<2> form together 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<3> stands for hydrogen or a C1-C4-alkyl group. The device comprises the following equipment: (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). The material has been selected from the group consisting of the following classes of materials: titanium-palladium alloys, nickel-based materials containing chrome, molybdenum, and/or wolfram and high-alloy, austenitic special chrome-nickel steels containing molybdenum.