aApplied Research of High Softening Point Deoiled Asphalt from Residuum Solvent Deasphalting 高软化点被去油的沥青应用的研究从残留物溶剂Deasphalting [translate] aTeache to seeking the truth, learn to be honorable person Teache到寻找真相,学会是高尚的人 [translate] aSometimes truth is painful but ...
Process and device for the deasphalting of residues from the vacuum distillation of petroleum, and application to the regeneration of lubricating oils.A process for the de-asphalting of residues from the vacuum distillation of petroleum in which the material to be treated is placed in contact with...