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US 10,472,305 B2Granted
Heat integration in disproportionation or transalkylation processes
AssigneeBP Corporation North America Inc.
InventorsCraig Colling, Brian Slusar
Life of this patent
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Abstract
Toluene disproportionation and C9/C10 transalkylation are a significant source of xylenes in a modern aromatics complex. Methods and apparatuses for improving the energy efficiency of these disproportionation and transalkylation processes are provided.
Claims18
A process comprising the steps of:
- (a) reacting, in a reactor, a reactor feed stream comprising toluene, C9 aromatics, C10 aromatics, and hydrogen over a catalyst to produce a reactor effluent stream comprising benzene and xylenes;
- (b) cooling the reactor effluent stream to form a first two-phase mixture;
- (c) separating the first two-phase mixture into a first liquid stream and a first vapor stream;
- (d) providing at least a portion of the first liquid stream to a benzene column, wherein the portion of the first liquid stream provided to the benzene column does not contact a stabilizer column before being provided to the benzene column;
- (e) recovering benzene from the first condensed liquid stream in the benzene column;
- (f) cooling the first vapor stream to form a second two-phase mixture;
- (g) separating the second two-phase mixture into a second liquid stream and a second vapor stream;
- and
- (h) providing the second liquid stream to the stabilizer column.
6 more elements
A process comprising the steps of:
- (a) reacting, in a reactor, a reactor feed stream comprising toluene, C9 aromatics, C10 aromatics, and hydrogen over a catalyst to produce a reactor effluent stream comprising benzene, toluene, and xylenes;
- (b) cooling the reactor effluent stream to form a first two-phase mixture;
- (c) separating the first two-phase mixture into a first liquid stream and a first vapor stream;
- (d) providing the first liquid stream to a stabilizer column to produce a side draw stream comprising benzene, toluene, and C8 aromatics;
- (e) providing the side draw stream to an extractive distillation unit;
- (f) cooling the first vapor stream to form a second two-phase mixture;
- and
- (g) separating the second two-phase mixture into a second liquid stream and a second vapor stream.
5 more elements
Dependencies are inferred from the claim text.