首页>
外国专利>
Spent kraft boiling lye treatment by coking - in acidic liquid phase and desulphurisation of coke with hydrogen, for rapid treatment
Spent kraft boiling lye treatment by coking - in acidic liquid phase and desulphurisation of coke with hydrogen, for rapid treatment
展开▼
机译:焦化废牛皮纸沸腾碱液处理-在酸性液相中并用氢气将焦炭脱硫,以进行快速处理
展开▼
页面导航
摘要
著录项
相似文献
摘要
Treatment of spenk kraft boiling lye comprises na) treating the lye with SO2 in an absorption zone to reduce the pH to =7, pref. 2-5; (b) fluid coking under autogenous pressure, forming coke, gas and an aq. stream; (c) sepg. the coke and the aq. stream; (d) burning the gas to produce SO2; (e) washing the coke with part of the aq. stream and drying with flue gas; (f) passing H2 at 371-1093, pref. 538-816 degrees C over the coke, with H2S formation; and (g) adding lime and the H2S formed to the aq. stream in an absorption zone, to produce new kraft boiling lye. Only 2 hr. treatment with H2 (at 732 degrees C and 1.05kg/cm2) are needed to reduce the S content of the coke from 14 to 2.14% and a total of 92% of the S in the starting material can be recovered as H2S for use in the process.
展开▼