Alkylation process utilizing enhanced boiling surface heat exchanger in the reaction zone
This patent describes a process of alkylating isoparaffinic hydrocarbons with olefinic hydrocarbons in the presence of an acid catalyst comprising the steps of reacting isoparaffinic hydrocarbons and olefinic hydrocarbons in the presence of acid catalyst in a reaction zone to form alkylate, withdrawing a mixture of hydrocarbons with acid catalyst as effluent from the reaction zone, separating the effluent into an acid phase and a hydrocarbon phase in a first separating zone, reducing the pressure on the hydrocarbon phase to refrigerate it and vaporize volatile hydrocarbons, passing the refrigerated hydrocarbon phase in indirect heat exchange with the reaction mixture of hydrocarbons and catalyst in the reaction zone to remove exothermic heat of reaction and vaporize further volatile hydrocarbons in the hydrocarbon phase. The indirect heat exchange having an overall heat transfer coefficient U/sub omicron/, separating the liquid portion of the hydrocarbon phase from the vapor portion thereof in a second separating zone, fractionating the liquid portion of the hydrocarbon phase to remove alkylate, passing the vapor phase material removed in the second separating zone through a compressor and a condenser to compress and condense the vapor phase to form a liquid phase, reducing the pressure on the liquid phase to refrigerate it and vaporize volatile hydrocarbons forming an isoparaffinic hydrocarbon liquid phase and a volatile hydrocarbon vapor phase, separating the refrigerated isoparaffinic hydrocarbon liquid phase from the volatile hydrocarbon vapor phase in a third separating zone, and adding the separated refrigerated isoparaffinic hydrocarbon liquid phase as a reactant in the reaction zone.
- Assignee:
- Union Carbide Corp., Danbury, CT
- Patent Number(s):
- US 4769511
- OSTI ID:
- 6477804
- Resource Relation:
- Patent File Date: Filed date 5 Mar 1987
- Country of Publication:
- United States
- Language:
- English
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