Process for converting lpg to higher hydrocarbon(s)
AssigneeSabic Global Technologies B.V.
InventorChristoph Dittrich
Life of this patent
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Abstract
The present invention relates to a process for converting a feed comprising C2-C4 alkanes to higher hydrocarbon(s) including aromatic hydrocarbon(s) in n reaction zones operated in series, wherein m reaction zones are not participating in the conversion process and only (n-m) reaction zones are operated under reaction conditions sufficient to convert at least a portion of said a feed comprising C2-C4 alkanes to an effluent having said higher hydrocarbon(s). An object of the present invention is to provide a process for converting LPG to higher hydrocarbon(s) including aromatic hydrocarbon(s) wherein a high reactant, i.e. ethane, propane and/or butane, conversion can be achieved.
Claims13
A process for converting LPG to higher hydrocarbon(s) including aromatic hydrocarbon(s) in n reaction zones operated in series, wherein m reaction zones are not participating in the conversion process and only (n-m) reaction zones are operated under reaction conditions sufficient to convert at least a portion of said LPG to an effluent having said higher hydrocarbon(s), wherein each reaction zone is initially numbered serially with a designator from 1 to n, the process comprising:
- (a) providing a quantity of catalytic material within each reaction zone;
- (b) providing to the reaction zone designated as 1 a hydrocarbon feedstock containing LPG;
- (c) heating at least a portion of the effluent of the said reaction zone designated as 1 to the inlet temperature of the reaction zone designated as 2, and more generally, heating at least a portion of the effluent of each reaction zone with a designator equal or smaller than (n-m−1) to the inlet temperature of the reaction zone with a designator larger by one than that of the reaction zone from which said effluent originates;
- (d) transferring said at least portion of said effluent of the said reaction zone designated as 1 to said reaction zone designated as 2, and more generally, transferring said at least portion of said reaction zone with a designator equal or smaller than (n-m−1) to the reaction zone with a designator larger by one than that of the reaction zone from which said at least portion of said effluent originates;
- (e) maintaining said reaction zone designated as 2 at an average temperature higher than or equal as in reaction zone designated as 1, and more generally, maintaining each reaction zone with a designator equal or smaller than (n-m) at an average temperature higher or equal as in the reaction zone with designator smaller by one than that of said reaction zone,
- feeding the effluent from the reaction zone with the designator (n-m) to another process unit,
- and regenerating the reaction zones with a designator larger than (n-m), followed by
- (f) terminating transferring effluent from the reaction zone with the designator (n-m−1) to the reaction zone with the designator (n-m);
- (g) starting regenerating said reaction zone with the designator (n-m) containing deactivated catalytic material;
- (h) raising the inlet temperature of each reaction zone with a designator equal or smaller than (n-m−1) to the former inlet temperature of the reaction zones with a designator larger by one than that of said reaction zone, respectively;
- (i) changing the value of each designator equal or smaller than (n−1) to a number larger by one than its initial value, and changing the value of the designator with a value of n to 1,
- (j) repeating steps (b) to (i).
A process for converting LPG to higher hydrocarbon(s) including aromatic hydrocarbon(s) in n reaction zones operated in series, wherein m reaction zones are not participating in the conversion process and only (n-m) reaction zones are operated under reaction conditions sufficient to convert at least a portion of said LPG to an effluent having said higher hydrocarbon(s), wherein each reaction zone is initially numbered serially with a designator from 1 to n, the process comprising:
- (a) providing a quantity of catalytic material within each reaction zone;
- (b) providing to the reaction zone designated as 1 a hydrocarbon feedstock containing LPG;
- (c) heating at least a portion of the effluent of the said reaction zone designated as 1 to the inlet temperature of the reaction zone designated as 2, and more generally, heating at least a portion of the effluent of each reaction zone with a designator equal or smaller than (n-m−1) to the inlet temperature of the reaction zone with a designator larger by one than that of the reaction zone from which said effluent originates;
- (d) transferring said at least portion of said effluent of the said reaction zone designated as 1 to said reaction zone designated as 2, and more generally, transferring said at least portion of said reaction zone with a designator equal or smaller than (n-m−1) to the reaction zone with a designator larger by one than that of the reaction zone from which said at least portion of said effluent originates;
- (e) maintaining said reaction zone designated as 2 at an average temperature higher than or equal as in reaction zone designated as 1, and more generally, maintaining each reaction zone with a designator equal or smaller than (n-m) at an average temperature higher or equal as in the reaction zone with designator smaller by one than that of said reaction zone,
- feeding the effluent from the reaction zone with the designator (n-m) to another process unit,
- and regenerating the reaction zones with a designator larger than (n-m), followed by
- (f) terminating transferring effluent from the reaction zone designated as 1 to the reaction zone designated as 2;
- (g) starting regenerating the reaction zone designated as 1 containing deactivated catalytic material;
- (h) decreasing the inlet temperature of each reaction zone with a designator larger than 1 and equal or smaller than (n-m) to the former inlet temperature of the reaction zones with a designator smaller by one than that of said reaction zone, respectively;
- (i) changing the value of each designator equal and larger than 2 to a number smaller by one than its initial value, and changing the value of the designator with value 1 to n,
- (j) repeating steps (b) to (i).
Dependencies are inferred from the claim text.