氨基磺酸/钨酸钠催化氧化环己酮合成己二酸

Catalytic oxidation of cyclohexanone to adipic acid with sulfamic acid/sodium tungstate catalyst system

以环己酮和质量分数30%过氧化氢(H_2O_2)为反应物,钨酸钠为催化剂,采用氨基磺酸为酸性配体催化合成了己二酸。考察了催化剂用量、配体用量、H_2O_2与环己酮摩尔比、反应时间及催化剂重复使用性等因素对产物收率的影响。结果表明:适宜反应条件为环己酮:H_2O_2:钨酸钠:氨基磺酸摩尔比1.00:4.94:0.02:0.02,反应6h,己二酸收率达81.5%。采用对甲基苯磺酸为酸性配体,适宜反应条件下己二酸收率为71.2%,低于氨基磺酸为酸性配体的反应收率。

Adipic acid was synthesized from the reaction system-of cyclohexanone and 30% hydrogen peroxide（ H202 ） by mass fraction with sodium tungstatc as a catalyst and sulfamic acid as acidic ligand. The effects of the catalyst amount, ligand amount, mole ratio of H2O2 and cyclohexanone, reaction time and repeated use performance of the catalyst system on the product yield were investigated. The results showed that the yield of adipic acid can be 81.5% when the mole ratio of cyclohexanone, H2O2, sodium tungstate and sulfamic acid was 1.00：4.94：0.02：0.02 and the reaction time was 6 h. The yield of adipie acid was 71.2% using the toluene sulfonic acid as the acidic ligand under the same conditions.