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US 7,250,542 B2Granted
Paraffin alkylation
AssigneeCatalytic Distillation Technologies
InventorsLawrence A. Smith, Jr., Mitchell E. Loescher, John R. Adams, Abraham P. Gelbein
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AssigneeCatalytic Distillation Technologies
InventorsLawrence A. Smith, Jr., Mitchell E. Loescher, John R. Adams, Abraham P. Gelbein
Estimating the term…
A process for the alkylation of alkane with olefin or olefin precursor such as an oligomer of tertiary olefin comprising contacting a liquid system comprising acid catalyst, isoparaffin and olefin in concurrent downflow into contact in a reaction zone with a disperser mesh under conditions of temperature and pressure to react said isoparaffin and said olefin to produce an alkylate product is disclosed. Preferably, the liquid system is maintained at about its boiling point in the reaction zone. Unexpectedly, the olefin oligomers have been found to function as olefin precursors and not as olefins in the reaction. Thus, for example, a cold acid alkylation using an oligomer of isobutene (principally dimer and trimer) with isobutane produces isooctane with the isobutane reacting with the constituent isobutene units of the oligomers on a molar basis. The product isooctane is essentially the same as that produced in the conventional cold acid process.
An integrated process for the production of alkylate comprising contacting a stream comprising normal and tertiary olefins with an acid cation resin catalyst under oligomerization conditions to preferentially react a portion of the tertiary olefins with themselves to form oligomers and feeding said oligomers and isoalkane to an alkylation zone under alkylation conditions in the presence of an acid alkylation catalyst in concurrent downflow under conditions of temperature and pressure to maintain said liquid system at about its boiling point through a reaction zone packed with disperser contacting internals comprising liquid-liquid coalescers;
A process for the production of alkylate comprising the steps of reacting olefins with themselves to form oligomers and contacting the oligomerization product with an alkane in the presence of an alkylation catalyst in concurrent downflow under conditions of temperature and pressure to maintain said liquid system at about its boiling point through a reaction zone packed with disperser contacting internals comprising liquid-liquid coalescers to dissociate said oligomerization product into its constituent olefins and to react with said alkane to produce alkylate.
A process for the production of alkylate comprising the steps of reacting C2 to C16 tertiary olefins with themselves to form oligomers and contacting the oligomerization product with isoalkane in the presence of an acid alkylation catalyst in concurrent downflow under conditions of temperature and pressure to maintain said liquid system at about its boiling point through a reaction zone packed with disperser contacting internals comprising liquid-liquid coalescers to dissociate said oligomerization product into its constituent olefins which react with said isoalkane to form alkylate.
Dependencies are inferred from the claim text.