Abstract: There is provided a water-soluble additive composition including a cyclic carboxylic acid, the water-soluble additive composition satisfying at least one of the following Conditions 1 to 4: (Condition 1) component (A) the cyclic carboxylic acid, which is other than the following component (B1), and component (B1) one or more selected from the group consisting of gallic acid and an ester thereof are included; (Condition 2) the total content of Na+ and NH4+ is equal to or more than 100 ppm and equal to or less than 5000 ppm with respect to the cyclic carboxylic acid; (Condition 3) the total inorganic ion content (excluding hydrogen ions and hydroxyl group ions) is equal to or more than 300 ppm and equal to or less than 5000 ppm with respect to the cyclic carboxylic acid; and (Condition 4) component (A) the cyclic carboxylic acid, which is other than the following component (B2), and component (B2) an amino acid are included.

Abstract: An embodiment of a method for producing a cyclic compound of the present invention includes a step of causing a decarboxylation reaction in a cyclic carboxylic acid compound by subjecting a starting material containing the cyclic carboxylic acid compound to a heat treatment of heating under a catalyst to obtain a cyclic compound, in which the catalyst includes zeolite formed of an aluminum/silicon-containing composite oxide, and in which the zeolite has an SiO2/Al2O3 ratio of 7 to 500. In addition, another embodiment of the method for producing a cyclic compound of the present invention includes a step of causing a decarboxylation reaction in a cyclic carboxylic acid compound by subjecting a starting material containing the cyclic carboxylic acid compound to a heat treatment of heating in the presence of a non-solid acid to obtain a cyclic compound.

Abstract: There is provided a water-soluble additive composition including a cyclic carboxylic acid, the water-soluble additive composition satisfying at least one of the following Conditions 1 to 4: (Condition 1) component (A) the cyclic carboxylic acid, which is other than the following component (B1), and component (B1) one or more selected from the group consisting of gallic acid and an ester thereof are included; (Condition 2) the total content of Na+ and NH4+ is equal to or more than 100 ppm and equal to or less than 5000 ppm with respect to the cyclic carboxylic acid; (Condition 3) the total inorganic ion content (excluding hydrogen ions and hydroxyl group ions) is equal to or more than 300 ppm and equal to or less than 5000 ppm with respect to the cyclic carboxylic acid; and (Condition 4) component (A) the cyclic carboxylic acid, which is other than the following component (B2), and component (B2) an amino acid are included.