Method for obtaining an ammonium carbamate solution from a gas mixture containing NH3, H2O and CO2
AssigneeDsm IP Assets B.V.
InventorGuillaume Mario Hubert Jozef Lardinois
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for obtaining an ammonium carbamate solution from a gas mixture that contains more than 40 wt. % NH3, less than 50 wt. % CO2 and less than 40 wt. % H2O and has a pressure between 0.1 MPa and 4 MPa, comprising a compression step, in which the pressure of the gas mixture is increased to a pressure between 0.5 MPa and 25 MPa, and an absorption step.
Claims15
Method for obtaining an ammonium carbamate solution from a gas mixture that contains more than 40 wt % NH3, less than 50 wt % CO2 and less than 40 wt % H2O and has a pressure between 0.1 MPa and 4 MPa, comprising a compression step in which the pressure of the gas mixture is increased to a pressure between 0.5 MPa and 25 MPa, followed by a first partial condensation step, in which the gas mixture is converted into a gas/liquid mixture, which is followed by an absorption step.
Method for obtaining an ammonium carbamate solution from a gas mixture comprising NH3, CO2 and H2O, wherein the amount of NH3 is more than 40 wt %, the amount of CO2 is less than 50 wt %, and the amount of H2O present is less than 40 wt % and said mixture having a pressure between 0.1 MPa and 4 MPa, said method comprising compressing said gas mixture to a pressure between 0.5 MPa and 25 MPa in a compressor wherein the temperature of the components of the compressor that come into contact with the gas mixture is such that no condensation of the gas mixture occurs during compression, thereby obtaining a compressed gas mixture, partially condensing the compressed gas mixture, to form a gas/liquid mixture, and absorbing the gas/liquid mixture to form an ammonium carbamate solution.
Method for obtaining an ammonium carbamate solution from a gas mixture comprising more than 40 wt % NH3, less than 50 wt % CO2 and less than 40 wt % H2O and having a pressure between 0.1 MPa and 4 MPa, said method comprising separating any liquid present in the gas mixture;
- compressing said gas mixture from which any liquid has been removed to a pressure between 0.5 MPa and 25 MPa, thereby obtaining a compressed gas mixture free from liquid, partially condensing the compressed gas mixture to form a gas/liquid mixture, and absorbing the gas/liquid mixture to form an ammonium carbamate solution, comprising more than 10 wt % water.
Dependencies are inferred from the claim text.