# US 9,000,249 B2 · Alkylation unit and process

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- Number: US 9,000,249 B2
- Document ID: US9000249B2
- Status: Granted
- Kind: B2
- Application number: 13/891,491
- Filed: 2013-05-10
- Published: 2014-11-13
- Granted: 2015-04-07
- Earliest claimed: 2013-05-10
- Assignees: Uop LLC
- Applicants: Uop LLC
- Inventors: Mark L. Gravley; Martyn E. Pfile
- Web page: https://patentgrep.com/patent/US9000249B2

## CPC

- B01J 19/245: {placed in series}
- C07C 2/58: Catalytic processes
- B01J 2219/00051: Controlling the temperature
- B01J 2219/24: Stationary reactors without moving elements inside
- C07C 2527/1206: Hydrogen fluoride
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

A process for producing alkylated hydrocarbons includes the steps of: (a) combining a first feed stream comprising an olefin and an isoparaffin with an alkylation catalyst stream in a first alkylation reactor, (b) removing heat of reaction from the first alkylation reactor, (c) passing an effluent of the first alkylation reactor to a first reaction zone of a second alkylation reactor operating adiabatically to thereby form a first reaction zone effluent, (d) passing the first reaction zone effluent to a second reaction zone of the second alkylation reactor for mixture with a second feed stream comprising an olefin and an isoparaffin, and (e) passing an effluent of the second alkylation reactor to a settler for separation into a hydrocarbon stream and an alkylation catalyst effluent stream. An alkylation unit for carrying out the process is also disclosed.

## Claims

### Claim 1

A process for producing alkylated hydrocarbons, the process comprising:
(a) combining a first feed stream comprising an olefin and an isoparaffin with an alkylation catalyst stream in a first alkylation reactor;
(b) removing heat of reaction from the first alkylation reactor;
(c) passing an effluent of the first alkylation reactor to a first reaction zone of a second alkylation reactor to thereby form a first reaction zone effluent;
(d) passing the first reaction zone effluent to a second reaction zone of the second alkylation reactor for mixture with a second feed stream comprising an olefin and an isoparaffin; and
(e) passing an effluent of the second alkylation reactor to a settler for separation into a hydrocarbon stream and an alkylation catalyst effluent stream.

### Claim 2 (depends on 1)

The process of claim 1 further comprising:
(f) passing the hydrocarbon stream to a fractionation unit,
(g) separating the hydrocarbon stream into an alkylate stream and an isoparaffin recycle stream, and
(h) combining the isoparaffin recycle stream with the first feed stream and the second feed stream.

### Claim 3 (depends on 1)

The process of claim 1 further comprising: controlling a ratio of a first volumetric flow rate of the first feed stream to a second volumetric flow rate of the second feed stream to be between about 3:1 and about 1:3.

### Claim 4 (depends on 1)

The process of claim 1 further comprising: directing the first feed stream into the first alkylation reactor through a plurality of inlet loci comprising four to eight inlet points longitudinally spaced intermediate ends of the first alkylation reactor.

### Claim 5 (depends on 1)

The process of claim 1 wherein:
the isoparaffin comprises a C4-C5 alkane, and
the olefin comprises a C3-C5 alkene.

### Claim 6 (depends on 1)

The process of claim 1 further comprising: passing the alkylation catalyst effluent stream from the settler to the first alkylation reactor.

### Claim 7 (depends on 1)

The process of claim 1 further comprising: operating the second alkylation reactor adiabatically.

### Claim 8 (depends on 1)

The process of claim 1 wherein: step (d) further comprises passing a second reaction zone effluent to a third reaction zone of the second alkylation reactor for mixture with a third feed stream comprising an olefin and an isoparaffin.

### Claim 9 (depends on 1)

The process of claim 1 further comprising:
controlling a first molar ratio of isoparaffin to olefin in the first feed stream to be between about 5:1 and about 20:1, and
controlling a second molar ratio of isoparaffin to olefin in the second feed stream to be between about 5:1 and about 20:1.

### Claim 10 (depends on 1)

The process of claim 1 further comprising: controlling a volume ratio of the alkylation catalyst to the first feed stream to be between about 1:1 and about 4:1.