Mobil Oil Corporation

Tomas R Melli

Jonathan E Child

Sergei Yurchak

Anagha A Gupte

Kenneth J Del Rossi

Michael Alan Better

Rafi Jalkian

Edward H Edelson

A method for separating conjunct polymers which are formed as byproducts of acid catalyzed isoparaffin-olefin alkylation and sulfolane from a mixture containing conjunct polymers, sulfolane, and hydrofluoric acid comprising stripping HF from the spent catalyst, treating the stripped, spent catalyst with hydrogen to provide a stripped hydrotreated catalyst stream, and gravitationally separating the stripped hydrotreated catalyst stream to remove conjunct polymeric byproducts.

Removal of ASO from HF/sulfolane alkylation catalyst

The present invention provides an acid catalyzed isoparaffin-olefin alkylation process which improves process stability and safety by storing the acid in an excess of an additive which reduces the fuming tendency of the mixture, for example, a sulfone. Acid is stripped from the additive and concentrated prior to charging the acid to the alkylation reaction zone. Specifically, because the stored solution of acid in the additive is more dilute than can be effectively used for isoparaffin-olefin alkylation, the acid is concentrated prior to charging the catalyst mixture to the reaction zone. The invention solves the problem of conjunct polymer accumulation by diluting the conjunct polymer with a relatively large volume of the additive and continuously regenerating a slipstream of the dilute acid/additive mixture.

Liquid acid alkylation catalyst and isoparaffin-olefin alkylation process

The present invention provides a method for separating conjunct polymers which are formed as byproducts of acid catalyzed isoparaffin-olefin alkylation and sulfolane from a mixture containing conjunct polymers, sulfolane, and hydrofluoric acid, which method provides a sulfolane recycle stream which requires no further drying before charging the stream to the alkylation reaction zone.

Regeneration of HF-based alkylation catalyst

The present invention provides a method for separating conjunct polymers which are formed as byproducts of acid catalyzed isoparaffin-olefin alkylation and sulfolane from a mixture containing conjunct polymers, sulfolane, and hydrofluoric acid, and for minimizing accumulation of conjunct polymeric byproducts in the recycled acid catalyst.

Removal of light ASO in HF alkylation process

A process is disclosed for regenerating a spent liquid acid catalyst comprising the steps of:

Liquid acid regeneration method

The present invention provides a method for separating conjunct polymers and sulfolane from a mixture containing conjunct polymers, sulfolane, and hydrofluoric acid comprising the sequential steps of:

Sulfolane purification method

This invention provides a method for separating ASO from a mixture containing ASO, HF and sulfolane comprising the steps of:

Method for regenerating HF/sulfolane alkylation catalyst

The present invention provides a method for separating conjunct polymers which are formed as byproducts of acid catalyzed isoparaffin-olefin alkylation and sulfolane from a mixture containing conjunct polymers, sulfolane, and hydrofluoric acid comprising the sequential steps of:

Method for separating conjunct polymeric byproducts from mixture

Sulfolane purification by hydrocarbon extraction

The present invention provides a method for separating sulfolane from a mixture containing conjunct polymers, sulfolane, and hydrofluoric acid comprising the sequential steps of:

Separation of sulfolane from conjunct polymeric byproducts

A single path process for alkylating a hydrocarbon feedstock containing an olefin and an isoparaffin is disclosed. The process includes dispersing an acid-based liquid alkylation catalyst into a reaction zone for contact with a continuous hydrocarbon phase. The process further includes separating the hydrocarbon phase from the acid catalyst upon completion of the alkylation reaction and providing a continuous on-line regeneration of the entire volume of catalyst once it has been separated from the hydrocarbon phase.

Single path alkylation method employing reduced acid inventory

The present invention includes an isoparaffin:olefin alkylation process and apparatus in which liquid acid inventory is reduced and temperature control is improved by reacting the isoparaffin:olefin feed with a thin film of liquid acid catalyst supported on a heat exchange surface.

Film type alkylation process

A method for separating conjunct polymers and sulfolane from a mixture containing conjunct polymers, sulfolane, and hydrofluoric acid is disclosed, which method comprises the sequential steps of separating hydrofluoric acid from said mixture to provide an intermediate stream containing less than about 30 percent hydrofluoric acid by weight and gravitationally separating said intermediate stream into a sulfolane-enriched stream and a conjunct polymer-enriched stream.

A process and apparatus are disclosed for acid continuous alkylation of a hydrocarbon-containing feedstream in which the inventory of acid is reduced. The apparatus used combines a reactor, settler and heat exchanger in a single vessel. The acid phase flows out of the reactor only for acid makeup, to account for acid consumption, and regeneration.

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Sewell, NJ, United States of America

Tomas R Melli