| 摘要 |
A novel catalyst has been developed for increasing the rate of oxidizing sulfides, particularly sulfides present in pulping liquor and, in turn, improving the efficiency in paper pulping processes. According to the invention, a sulfide containing pulping liquor is contacted with a catalyst system comprising oxides of manganese wherein the majority of the particles of the catalyst has a size of 45 microns or smaller. The oxides of manganese may optionally be used in combination with compounds of scandium, yttrium, rare earth metals, Al, Fe, Ni, Cr, and Co. |
