The general procedure for synthesizing cis-1,4-cyclohexanedicarboxylic acid from terephthalic acid was as follows: 200 g of terephthalic acid, 15 g of the Pd-Pt/C catalyst described in Examples 1 to 14 and 1000 g of water were added to an autoclave, and stirring was initiated. The reaction system was first purged with nitrogen three times, followed by replacement with hydrogen three times. The hydrogen pressure was adjusted to 4 MPa and the reaction temperature was kept stable at 200 °C, and the hydrogen was continuously supplied for the reaction for 3 hours. After the reaction was completed, the catalyst was removed by filtration while hot. The filtrate was cooled and filtered again to collect the filter cake. The filter cake was dried at 120 °C to obtain the solid product. The solid product was analyzed by liquid chromatography to determine the contents of 1,4-cyclohexanedicarboxylic acid and trans-1,4-cyclohexanedicarboxylic acid therein, from which the yield of 1,4-cyclohexanedicarboxylic acid and the selectivity of trans-1,4-cyclohexanedicarboxylic acid were calculated and the results are recorded in Table 2.
[1] Patent: CN103769089, 2016, B. Location in patent: Paragraph 0029; 0030
[2] RSC Advances, 2017, vol. 7, # 30, p. 18178 - 18188
[3] Patent: CN105237341, 2016, A. Location in patent: Paragraph 0014
[4] Patent: KR2017/36493, 2017, A. Location in patent: Paragraph 0057; 0058; 0059
[5] Patent: KR2018/35585, 2018, A. Location in patent: Paragraph 0117-0121; 0145; 0146
