发明授权
US4592828A Process for upgrading petroleum residua 失效
升华石油渣的工艺

Process for upgrading petroleum residua
摘要:
Petroleum resid is upgraded in an improved process to produce a low pour point 650.degree.-775.degree. F. fraction without disturbing the product characteristics of other distillate boiling range fractions. The 650.degree.-775.degree. F. fraction is dewaxed separately from the remaining hydrodesulfurized product.
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