首页>
外国专利>
Method for the improvement of the oxidation resistance of hydrocarbon oil, especially transformer oils by the selective removal of pro-oxidant nitrogen and sulfur compounds therefrom
Method for the improvement of the oxidation resistance of hydrocarbon oil, especially transformer oils by the selective removal of pro-oxidant nitrogen and sulfur compounds therefrom
展开▼
机译:通过选择性地从其中除去前氧化剂氮和硫化合物来改善烃油,特别是变压器油的抗氧化性的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
Liquid hydrocarbon streams, preferably petroleum streams, most preferably lube and specialty oil streams and in particular transformer oils are rendered resistant to oxidation by treatment with a silver salt impregnated adsorbent, preferably silver nitrate impregnated alumina by the process of contacting the hydrocarbon oil stream with the silver salt impregnated adsorbent and recovering a hydrocarbon stream of reduced pro- oxidant heteroatom compound (nitrogen compound and sulfur compound) content. The silver salt impregnated adsorbent is regenerated by sequential washing with portions of aromatic solvent and polar solvent. The aromatic solvent strips aromatic sulfides from the adsorbent. This fraction may be recombined with the hydrocarbon stream, especially in the case of transformer oils, so as to enhance the oxidation stability/resistance of the oil. The polar solvent, such as 3% methanol in toluene, strips the aliphatic sulfides from the absorbent. The regenerated column is then ready for reuse.
展开▼