Verfahren zur Herstellung von Oxalsaeure

摘要

1,256,152. Oxalic acid. MITSUBISHI EDOGAWA KAGAKU K.K. 1 Aug., 1969 [7 Aug., 1968], No. 38751/69. Heading C2C. Oxalic acid is prepared by oxidizing ethylene glycol in the absence of a catalyst with an acid mixture of 2-60% by weight of nitric acid, 20-78% sulphuric acid, and 20-50% water, the molar ratio of nitric acid/ethylene glycol being at least 3/1.