Methods for generating polissulfeto through oxidation of a liquor containing sulphide, to increase the yield of pulp in the formation of a pulp Kraft with a white liquor containing polissulfeto and to produce a white liquor oxidized containing active polissulfeto

摘要

Methods for generating polissulfeto through oxidation of a liquor containing sulphide, to increase the yield of pulp in the formation of a pulp Kraft with a white liquor containing polissulfeto and to produce a white liquor oxidized containing polissulfeto active. The polissulfeto produced by the oxidation of white liquor includes both active components, such as inactive.The polissulfeto "asset" and the only component that increases the yield of pulp. The amount of active polissulfeto formed when manganese oxides are used as catalyst in the process of generation is increased by the addition of a co catalyst.The addition of bismuth compounds and, in particular, bismuth oxide as a co catalyst increases the total amount of polissulfeto formed with all the manganese oxides and increases the amount of active polissulfeto produced, particularly when the use of manganese oxides belo w Res.The co catalyst also increases the number of cycles, in which the catalyst is more active, manganese dioxide, can participate before losing efficiency. Other elements in the same group and in adjacent groups of the periodic table are active, but these other elements are more soluble than bismuth and are toxic.