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US 5,849,965 AGranted
Multistage alkylation process
AssigneeAmoco Corporation
InventorsRobert L. Mehlberg, George A. Huff, Jr.
Life of this patent
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Abstract
In a multistage process, a relatively unreactive paraffinic substrate is alkylated in a primary stage while a more reactive aromatic substrate is alkylated in a secondary stage wherein at least a portion of the effluent from the primary stage is used as a diluent in the secondary stage. The alkylation reaction in each stage is catalyzed by an acid catalyst which is adsorbed on a particulate solid support.
Claims18
A process for the alkylation of paraffinic and aromatic substrates with olefinic alkylating agents which comprises:
- (a) establishing a plurality of contacting zones, wherein each contacting zone is comprised of a fixed-bed of particulate solid support and wherein each contacting zone contains an acid catalyst which is adsorbed on a confined volume of the solid support;
- (b) producing a first product stream of alkylation products in a primary stage by reacting a primary stage olefinic alkylating agent with a paraffinic substrate under alkylation conditions in at least one of said plurality of contacting zones;
- (c) producing a process stream by combining at least a portion of said first product stream with both an aromatic substrate and a secondary stage olefinic alkylating agent, wherein said primary and secondary stage olefinic alkylating agents are either the same or different;
- and
- (d) reacting said aromatic substrate with said secondary stage olefinic alkylating agent in a secondary stage by passing said process stream through at least one additional contacting zone of said plurality of contacting zones under alkylation conditions.
2 more elements
Dependencies are inferred from the claim text.