# US 2014/0194660 A1 · Process for reducing the benzene content of gasoline

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- Number: US 2014/0194660 A1
- Document ID: US20140194660A1
- Status: Published application
- Kind: A1
- Application number: 14/238,592
- Filed: 2011-11-30
- Published: 2014-07-10
- Earliest claimed: 2011-08-19
- Assignees: Badger Licensing LLC
- Inventors: Shyh-Yuan H. Hwang; Ronald Birkhoff; Richard F. Guarino; J. Erik Moy; Geeta Pherwani
- Web page: https://patentgrep.com/patent/US20140194660A1

## CPC

- C07C 2/64: Addition to a carbon atom of a six-membered aromatic ring
- C10G 29/20: Organic compounds not containing metal atoms
- C07C 2/66: Catalytic processes
- C10G 29/205: {by reaction with hydrocarbons added to the hydrocarbon oil}
- C07C 2529/40: of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11
- C07C 2529/70: of types characterised by their specific structure not provided for in groups C07C2529/08 - C07C2529/65
- C10G 2300/104: Light gasoline having a boiling range of about 20 - 100 °C
- C10G 2300/1088: Olefins
- C10G 2300/1092: C2-C4 olefins
- C10G 2300/1096: Aromatics or polyaromatics
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES

## Abstract

A process is described for alkylating benzene contained in a refinery gasoline stream, in which the refinery gasoline stream is contacted with an alkylating agent comprising one or more C2 to C5 olefins in an alkylation reaction zone under alkylation conditions to produce an alkylated effluent. The alkylation reaction zone comprises at least a first alkylation reaction stage and a second alkylation reaction stage and a portion of said alkylating agent is fed to each of said first and second alkylation reaction stages so that, although the molar ratio of alkylatable aromatic to alkylating agent in the total feed to the alkylation reaction zone is less than 1, the molar ratio of alkylatable aromatic to alkylating agent at the inlet of each of the first and second alkylation reaction stages is at least 1.0.

## Claims

### Claim 1

A process for alkylating benzene contained in a refinery gasoline stream, said process comprising contacting said refinery gasoline stream with an alkylating agent comprising one or more C2 to C5 olefins in an alkylation reaction zone under alkylation conditions to produce an alkylated effluent, wherein said alkylation reaction zone comprises at least a first alkylation reaction stage and a second alkylation reaction stage, wherein a portion of said alkylating agent is fed to each of said first and second alkylation reaction stages so that, although the molar ratio of alkylatable aromatic to alkylating agent in the total feed to the alkylation reaction zone is less than 1, the molar ratio of alkylatable aromatic to alkylating agent at the inlet of each of said first and second alkylation reaction stages is at least 1.0.

### Claim 2 (depends on 1)

A process according to claim 1, wherein the molar ratio of alkylatable aromatic to alkylating agent at the inlet of each of said first and second alkylation reaction stages is about 1.0 to about 2.0.

### Claim 3 (depends on 1)

A process according to claim 1, wherein said alkylated effluent is removed from said alkylation reaction zone without recycle to either of said first and second alkylation reaction stages.

### Claim 4 (depends on 1)

A process according to claim 1, wherein said refinery gasoline stream is a reformate or a light naphtha.

### Claim 5 (depends on 1)

A process according to claim 1, wherein said alkylating agent is propylene.

### Claim 6 (depends on 1)

A process according to claim 1, wherein said refinery gasoline stream comprises at least 10 wt % benzene.

### Claim 7 (depends on 1)

A process according to claim 1, wherein said alkylated effluent comprises less than 1 volume % benzene.

### Claim 8 (depends on 1)

A process according to claim 1, wherein said alkylated effluent comprises less than 0.62 volume % benzene.

### Claim 9 (depends on 1)

A process according to claim 1, wherein said alkylated effluent comprises no more than 2 volume % of compounds having a boiling point greater than the boiling point of 1,3,5-trisisopropylbenzene.

### Claim 10 (depends on 1)

A process according to claim 1, wherein the alkylation reaction in each of said first and second alkylation reaction stages takes place over a catalyst comprising an MWW zeolite.

### Claim 11 (depends on 1)

A process according to claim 1, wherein said refinery gasoline stream is substantially in the liquid phase during said contacting.