减压渣油 meaning in Chinese

goudron
short residuum
vacuum residue
vacuum residuum

Development of vacuum residue visbreaking process with hydrogen donors
加供氢剂的减压渣油减粘裂化工艺的开发
The fabrication of modified road asphalt by extracting paraffin from liaohe crude oil vacuumized residue
辽河原油的减压渣油深拔蜡并改性制取道路沥青
Manufacturing technique of wax microcrystalline : with crude oil vacuum residua fractions as material , it is made from propane taking off asphaltum , furfural refining , ketone benzene taking off oil , and argil refining
微晶蜡的生产工艺流程:本产品以天然原油的减压渣油为原料，经丙烷脱沥青、糠醛精制、酮苯脱油、白土补充精制及加氢补充精制冷却后成型而制得该系列产品。