除加氢尾气可直接利用外，其它炼厂气的硫和烯烃含量高，必须进行预加氢精制。
Except that the hydrogenation dry gas can be directly utilized, other refinery gases must be hydrotreated preliminary, owing to their high sulfur and olefin contents.
在上海炼油厂预加氢反应器投用前的内外部检验中，发现了大量的焊缝表面裂纹和内部埋藏裂纹。
On overall inspection of interior and exterior of pre-hydrogenating reactor of Shanghai Oil Refinery Factory, large cracks was found on the surface of weld and inside of the weld.
文章详细阐述了催化裂化重整车间抽提系统、预加氢系统、催化重整部分换热设备管束腐蚀情况。
The corrosion of heat exchanger tubes in extraction system, pre-treatment system and reforming system are described in detail.
从标定结果看，抚顺石油化工研究院研制开发的481-3预加氢催化剂和美国UOP公司的R-56催化剂性能较好，能够满足生产要求。
Catalyst 481-3 developed by Fushun Research Institute of Petroleum and Petrochemical and R-56 developed by UOP all exhibited better performance and ability to meet the production requirement.
研究了新型固体硫化剂硫代硫酸铵对加氢脱硫催化剂的预硫化。
Ammonium thiosulfate as a novel sulfiding agent was used for desulfidation of hydrodesulfurization ( HDS) catalysts.
实验结果表明，用膨胀床器外预硫化工艺对加氢催化剂进行硫化是可行的。
The results showed that it was feasible to sulfurize hydrotreating catalyst ex-situ by expansion bed process.
在相同工艺条件下对比评价结果表明，用EPRES技术制备的器外预硫化催化剂的加氢活性比常规器内硫化的同一催化剂好。
The test results showed that hydrotreating activity of ex-situ presulfided catalysts was superior to that of in-situ sulfided catalysts.
加氢催化剂的预硫化是提高催化剂活性、优化加氧催化操作，获得理想经济效益的关键技术之一。
Presulfuration of hydrogenation catalyst is an essential technology, which can enhance the catalyst activeness and optimize operation of hydrogenation catalysis and obtain ideal economic efficiency.
加氢催化剂的预硫化是提高催化剂活性、优化加氧催化操作，获得理想经济效益的关键技术之一。
Presulfuration of hydrogenation catalyst is an essential technology, which can enhance the catalyst activeness and optimize operation of hydrogenation catalysis and obtain ideal economic efficiency.
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