不同温度(℃)时每100毫升水中的溶解克数:
将软锰矿与煤粉按一定比例混合,经还原焙烧得一氧化锰。
第二步:酸解及除杂净化冷却后的MnO在15%的硫酸中酸解,并控制pH<5.2。酸解液调至pH=3-4后加入计量硫化钡除去重金属杂质,经过滤和静置进一步纯化。
第三步:干燥与结晶滤液经过浓缩、结晶、分离及热风干燥处理得最终产品硫酸锰。
2. 对苯二酚副产回收法 第一步:反应生成废液在对苯二酚生产过程中产生含有硫酸锰和硫酸铵的废液。
第二步:中和除杂脱氨废液经石灰乳中和去除杂质,脱去氨气后浓缩结晶分离得到硫酸锰产品。
3. 菱锰矿法 第一步:粉碎与浸取菱锰矿通过粉碎与硫酸反应生成硫酸锰溶液,再经过滤、加热浓缩及冷却结晶得硫酸锰成品。
4. 还原浸取法 第一步:混合反应将软锰矿与一定量的还原剂(如硫酸亚铁)和硫酸混合,在熟化后用水浸取过滤除渣得到硫酸锰溶液。
第二步:浓缩结晶再通过浓缩、结晶分离干燥制得最终产品硫酸锰。
5. 软锰矿与稀硫酸反应法直接用软锰矿与稀硫酸反应生成硫酸锰,经过滤及干燥处理得成品。
分类以上信息是关于硫酸锰的综合概述。请注意,在实际操作过程中应严格遵循安全生产规范和相关标准。
The selective oxidation of sulfides with hydrogen peroxide to give sulfoxides was carried out in aqueous solution by water-soluble manganese porphyrin as mimics of cytochrome P450-like catalyst. Different factors that influencing the selective oxidation of sulfides, for example, catalyst, amount of catalyst, solvent and reaction temperature were investigated. MnTE4PyP (meso-tetrakis(N-ethylpyridinium-4-yl) manganese porphyrin) was efficient and selective catalyst for oxidation of various sulfides. The reaction showed first-order dependence in both [sulfide] and [ H 2 O 2], and a fractional order respect to catalyst. Oxygen atom transfer mechanism involves high-valence intermediate was proposed, which was supported by kinetic orders and spectrophotometric evidences.
High-surface-area β-MnO2 nanoparticles exhibited high activity for the one-pot oxidative sulfonamidation of thiols to sulfonamides using O2 and NH3.