Patents Assigned to Add Astra Environment Technologies Pty Ltd
  • Process for recovering hydrocarbons from a carbon containing material
    Patent number: 6936159
    Abstract: A process for recovering hydrocarbons from coal or oil shale is disclosed. The process involves the steps of forming a pulp of finely divided coal or oil shale in a first reaction bed, adding concentrated sulphuric acid to the first reaction bed, controlling the temperature of the first reaction bed to produce a hydrocarbon mixture, and deacidifying the hydrocarbon mixture.
    Type: Grant
    Filed: November 23, 2000
    Date of Patent: August 30, 2005
    Assignee: Add Astra Environment Technologies Pty Ltd
    Inventor: Percy Evan Kean