Method and system for producing one or more olefins
A process ( 100 ) is proposed for the production of one or more olefins, in which a reaction feed containing oxygen and one or more paraffins is formed and in which a part of the oxygen in the reaction feed is reacted with a part of the one or more paraffins to form the one or more olefins by an oxidative process, to obtain a process gas, the process gas containing at least the unreacted part of the one or more paraffins and oxygen, the one or more olefins, one or more acetylenes, carbon dioxide and water. The process comprises subjecting the process gas or a gas mixture formed using at least a part of the process gas partially or completely to a condensate separation ( 2 ), a compression ( 3 ), an at least partial removal ( 4 ) of the oxygen and acetylene(s) and to one or more stages of a carbon dioxide removal ( 5 ) in the order given herein, wherein the at least partial removal ( 4 ) of the oxygen and of the acetylene(s) is performed at the same time and by a catalytic conversion using a catalyst comprising copper oxide or ruthenium, and wherein the catalytic conversion is performed at least in part in the form of a hydrogenation. A corresponding plant is also the subject of the present invention.
1. A process for producing one or more olefins, comprising:
forming a reaction feed which contains oxygen and one or more paraffins,
reacting a part of the oxygen in the reaction feed with a part of the paraffin(s) to form the olefin(s) by an oxidative process comprising oxidative dehydrogenation or oxidative coupling of methane, to obtain a process gas, the process gas comprising at least the unreacted part of the paraffin(s) and the oxygen, the olefin(s), one or more acetylenes, carbon dioxide and water, and
subjecting the process gas or a gas mixture formed using at least a part of the process gas, in the order indicated herein, to
i) partially or completely to a condensate separation,
ii) a compression,
iii) an at least partial removal of the oxygen and the acetylene(s) and
iv) to one or more stages of carbon dioxide removal ( 5 ),
wherein the at least partial removal of the oxygen and of the acetylene(s) is performed at the same time and by a catalytic conversion using a catalyst comprising copper oxide or ruthenium, and wherein the catalytic conversion is performed at least in part in the form of a hydrogenation.
2. The process according to claim 1 wherein the at least partial removal of oxygen and the acetylene(s) is carried out downstream of one or more stages of a carbon dioxide removal and upstream of one or more further stages of the carbon dioxide removal.
3. The process according to claim 1 , in which downstream of the at least partial removal of the oxygen and the acetylene(s), a drying and one or more separation steps are carried out.
4. The process according to claim 1 , in which the catalyst containing copper oxide is used and the at least partial removal of the oxygen and the acetylene(s) is carried out under reaction conditions comprising a temperature of 180 to 360° C., a pressure of 1 to 30 bar abs, an hourly gas space velocity of 1,000 to 15,000 h −1 and a ratio of hydrogen to oxygen of 0 to 5.
5. The process according to claim 1 , in which the ruthenium-containing catalyst is used and the at least partial removal of the oxygen and the acetylene(s) is carried out under reaction conditions which comprise a temperature of 120 to 360° C., a pressure of 1 to 30 bar abs, an hourly gas space velocity of 1,000 to 15,000 h −1 and a hydrogen/oxygen ratio of 0 to 5.
6. The process according to claim 1 , in which the at least partial removal of the oxygen and the acetylene(s) is carried out with the addition of hydrogen.
7. The process according to claim 1 , in which the at least partial removal of the oxygen and the acetylene(s) is carried out isothermally or at least in one step adiabatically.
8. The process according to claim 1 , wherein the oxidative dehydrogenation is carried out as oxidative dehydrogenation of ethane.
9. A plant for the production of one or more olefins, which is arranged to form a reaction feed containing oxygen and one or more paraffins, and which is arranged to react a part of the oxygen in the reaction feed with a part of the paraffin(s) to form the olefin(s) by an oxidative process comprising oxidative dehydrogenation or oxidative methane coupling, to obtain a process gas, wherein the process gas contains at least the unreacted part of the paraffin(s) and oxygen, the olefin(s), one or more acetylenes, carbon dioxide and water, characterized in that the plant is configured to subject the process gas partially or completely, in the order indicated herein, to a condensate separation, a compression, an at least partial removal of the oxygen and the acetylene(s) and to one or more stages of a carbon dioxide removal, wherein for the at least partial removal of the oxygen and the acetylene(s) at the same time and by a catalytic conversion a catalyst comprising copper oxide or ruthenium is provided which is adapted to catalyze the catalytic conversion at least in part in the form of a hydrogenation.
10. The plant according to claim 9 , which is configured to carry out a process for producing one or more olefins, in which a reaction feed is formed which contains oxygen and one or more paraffins, and in which a part of the oxygen in the reaction feed is reacted with a part of the paraffin(s) to form the olefin(s) by an oxidative process comprising oxidative dehydrogenation or oxidative coupling of methane, to obtain a process gas, the process gas comprising at least the unreacted part of the paraffin(s) and the oxygen, the olefin(s), one or more acetylenes, carbon dioxide and water, characterized in that the process comprises subjecting the process gas or a gas mixture formed using at least a part of the process gas, in the order indicated herein, partially or completely to a condensate separation, a compression, an at least partial removal of the oxygen and the acetylene(s) and to one or more stages of carbon dioxide removal, wherein the at least partial removal of the oxygen and of the acetylene(s) is performed at the same time and by a catalytic conversion using a catalyst comprising copper oxide or ruthenium, and wherein the catalytic conversion is performed at least in part in the form of a hydrogenation.