Process to prepare a sweet crude

Details Process to prepare a sweet crude Process to prepare a sweet crude

2007-11-29

2011-11-08

Griffin, Walter (Department: 1774)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With preliminary treatment of feed

C208S092000, C208S094000, C208S108000, C208S390000

Reexamination Certificate

active

08052864

ABSTRACT:
A process to prepare a sweet crude from an ash containing and heavy fraction of a tar sand oil comprising supplying an atmospheric distillation bottoms of a tar sands originated feed to a vacuum distillation to obtain a vacuum gas oil and a vacuum bottoms and contacting the vacuum gas oil with hydrogen to obtain a sweet synthetic crude. The vacuum bottoms obtained are separated into an asphalt fraction comprising between 0.1 and 4 wt % ash and a de-asphalted oil and the asphalt fraction is fed to a burner of a gasification reactor to obtain a mixture of hydrogen and carbon monoxide on which a water gas shift reaction is performed. Hydrogen sulphide and carbon dioxide are separated from the shifted gas in an acid removal unit thereby obtaining crude hydrogen which is purified and used to obtain the sweet synthetic crude. The asphalt fraction is provided to the burner in a liquid state and wherein in case the separation step fails to provide sufficient feed for the gasification reactor, vacuum bottoms from the first step are fed to the burner in a liquid state.

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