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US 6,555,722 B2Granted
Countercurrent alkylation process
AssigneeCatalytic Distillation Technologies
InventorJamin Chen
Life of this patent
Estimating the term…
Abstract
A countercurrent process for the alkylation of aromatic materials with olefins which takes place in a multi-bed system. The aromatic material is in the liquid phase; the olefin in the gaseous phase; and the catalyst in the solid phase. The olefinic material is fed below the catalyst bed in the gaseous phase and aromatic is fed as a liquid phase above the catalyst bed under conditions of temperature and pressure to maintain the aromatic product in the liquid phase and the olefin in the vapor phase.
Claims12
A process for the alkylation of organic aromatic compounds comprising the steps of:
- (a) feeding a liquid stream containing an organic aromatic compound into a reactor at a point above a bed of solid particulate aromatic alkylation catalyst contained in said reactor;
- (b) feeding a gaseous stream containing an olefin into the reactor at a point below the bed of solid particulate aromatic alkylation catalyst;
- (c) countercurrently contacting said organic aromatic compound with said olefin and said solid particulate aromatic alkylation catalyst under conditions of temperature and pressure and an average gas-liquid volume ratio about 1:4 to 10:1 in said bed to react a portion of said organic aromatic compound with a portion of said olefin to produce an alkylated organic aromatic product and to maintain said organic aromatic compound and said alkylated organic aromatic product in said liquid phase and said olefins in said gaseous phase;
- (d) withdrawing unreacted gaseous olefin from the reactor at a point above said bed of solid particulate aromatic alkylation catalyst;
- and
- (e) withdrawing unreacted organic aromatic compound and alkylated organic aromatic product from the reactor at a point below said bed of solid particulate aromatic alkylation catalyst.
3 more elements
A process for the alkylation of organic aromatic compounds comprising the steps of:
- (a) feeding a liquid light reformate stream containing organic aromatic compounds into a reactor at a point above a bed of solid particulate zeolite beta catalyst contained in said reactor;
- (b) feeding an off gas stream from an FCCU olefin concentration unit containing olefins into the reactor at a point below the bed of solid particulate zeolite beta catalyst;
- (c) countercurrently contacting said light reformate stream with said off gas stream and said solid particulate zeolite beta catalyst to react a portion of the organic aromatic compounds contained within said light reformate stream with a portion of the olefins contained within said off gas stream to produce alkylated organic aromatic products wherein the average gas-liquid volume ratio in said bed is about 1:4 to 10:1 under process conditions;
- (d) withdrawing unreacted off gas from the reactor at a point above said bed of solid particulate zeolite beta catalyst;
- and
- (e) withdrawing unreacted light reformate and alkylated organic aromatic products from the reactor at a point below said bed of solid particulate zeolite beta catalyst.
3 more elements
A process for the alkylation of organic aromatic compounds comprising the steps of:
- (a) feeding a liquid stream containing an organic aromatic compound into a reactor at a point above a bed of solid particulate catalyst;
- (b) feeding a gaseous stream containing an olefin into the reactor at a point below the bed of solid particulate catalyst;
- (c) countercurrently contacting said organic aromatic compound with said olefin and said solid particulate catalyst in a catalyst zone to react a portion of said organic aromatic compound with a portion of said olefin to produce an alkylated organic aromatic product and said average gas-liquid volume ratio in the catalyst zone is about 1:4 to 10:1 under process conditions;
- (d) withdrawing unreacted gaseous olefin from the reactor at a point above said bed of solid particulate catalyst;
- (e) withdrawing unreacted organic aromatic compound and alkylated organic aromatic product from the reactor at a point below said bed of solid particulate catalyst;
- and
- (f) adjusting the pressure within said reactor such that said aromatic containing stream and said alkylated organic aromatic product remain substantially in the liquid phase and said olefin containing stream remains substantially in the vapor phase.
4 more elements
Dependencies are inferred from the claim text.