Method for purifying and concentrating dinitrogen monoxide
AssigneeBASF SE
InventorsJoaquim Henrique Teles, Beatrice Roessler, Thomas Genger, Andreas Glass, Dieter Baumann, Jan-Martin Loening
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Abstract
The present invention relates to a process for purifying a gas mixture comprising dinitrogen monoxide and to the use of a gas mixture purified in this way as an oxidant for olefins. In a further embodiment, the present invention also relates to a process for preparing ketones comprising the oxidation of an olefin with a gas mixture which has been purified in accordance with the invention and comprises dinitrogen monoxide.
Claims22
A process for purifying a gas mixture comprising dinitrogen monoxide, comprising:
- A1 absorbing said gas mixture in an organic solvent,
- A2 desorbing said gas mixture from the laden organic solvent, and
- B adjusting the content of nitrogen oxides NOx in the gas mixture to at most 0.5% by volume based on the total volume of the gas mixture.
A method of using a gas mixture comprising dinitrogen monoxide as an oxidant for at least one olefin, comprising purifying said gas mixture comprising dinitrogen monoxide, said method comprising:
- A1 absorbing said gas mixture in an organic solvent,
- A2 desorbing said gas mixture from the laden organic solvent, and
- B adjusting the content of nitrogen oxides NOx in the gas mixture to at most 0.5% by volume based on the total volume of the gas mixture, and then contacting said gas mixture with at least one olefin.
A process for preparing a ketone, comprising:
- A1 absorbing a gas mixture comprising dinitrogen monoxide in an organic solvent,
- A2 desorbing said gas mixture from the laden organic solvent,
- B adjusting the content of nitrogen oxides NOx in the gas mixture to at most 0.5% by volume based on the total volume of the gas mixture, and
- C contacting the gas mixture with at least one olefin.
A process for purifying a gas mixture comprising dinitrogen monoxide, comprising:
- A1 absorbing said gas mixture in an organic solvent,
- A2 desorbing said gas mixture from the laden organic solvent, and
- B adjusting the content of nitrogen oxides NOx in the gas mixture to at most 0.5% by volume based on the total volume of the gas mixture,
- wherein the organic solvent is selected from the group consisting of toluene, nitrobenzene, 1,2-dichlorobenzene, tetradecane and dimethyl phthalate.
A method of using a gas mixture comprising dinitrogen monoxide as an oxidant for at least one olefin, comprising purifying said gas mixture comprising dinitrogen monoxide, said method comprising:
- A1 absorbing said gas mixture in an organic solvent,
- A2 desorbing said gas mixture from the laden organic solvent, and
- B adjusting the content of nitrogen oxides NOx in the gas mixture to at most 0.5% by volume based on the total volume of the gas mixture, wherein the organic solvent is selected from the group consisting of toluene, nitrobenzene, 1,2-dichlorobenzene, tetradecane, and dimethyl phthalate, and then contacting said gas mixture with at least one olefin.
A process for preparing a ketone, comprising:
- A1 absorbing a gas mixture comprising dinitrogen monoxide in an organic solvent,
- A2 desorbing said gas mixture from the laden organic solvent,
- B adjusting the content of nitrogen oxides NOx in the gas mixture to at most 0.5% by volume based on the total volume of the gas mixture, and
- C contacting the gas mixture with at least one olefin,
- wherein the gas mixture used in C has been liquefied.
Dependencies are inferred from the claim text.