(i) formic acid, (ii) the carboxylic acid which at least possesses 2 carbon atoms and/or those derivatives and flexible in order being in common, to produce (iii) anhydrous carboxylic acid method

摘要

(A) carboxylic acid (ii) and the ester which at least possess 2 carbon atoms exchanging formic acid ester (i), it converts to formic acid (iii) and carboxylic acid ester (iv) it fits; To carbonyl it converts to anhydrous carboxylic acid (v) carboxylic acid ester (iv) it was formed (b) process (a) in fits part, at least; At the same time at least the portion anhydrous carboxylic acid (v) it was formed (c) process (b) in the anhydride it depends on exchanging under the forming carboxylic acid (vi) and anhydrous carboxylic acid (vii) and carboxylic acid (ii), (i) formic acid (iii); (ii) carboxylic acid (ii) at least it possesses 2 carbon atoms and/or those derivatives; And the method being in common, of producing (iii) anhydrous carboxylic acid (vii).