# US 2019/0169094 A1 · Apparatus and method for purifying cumene

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- Number: US 2019/0169094 A1
- Document ID: US20190169094A1
- Status: Published application
- Kind: A1
- Application number: 16/270,393
- Filed: 2019-02-07
- Published: 2019-06-06
- Earliest claimed: 2014-05-22
- Assignees: LG Chem.Ltd.
- Applicants: LG Chem.Ltd.
- Inventors: Sung Kyun KIM; Sung Kyu Lee; Joon Ho Shin
- Web page: https://patentgrep.com/patent/US20190169094A1

## CPC

- C07C 7/04: by distillation
- B01D 3/009: {in combination with chemical reactions}
- B01D 3/10: Vacuum distillation (B01D3/12 takes precedence)
- B01D 3/143: {by two or more of a fractionation, separation or rectification step}
- B01D 3/4211: {of columns}
- B01L 3/10: Wash bottles
- C07C 2/64: Addition to a carbon atom of a six-membered aromatic ring
- C07C 7/005: {Processes comprising at least two steps in series}
- C07C 15/085: Isopropylbenzene
- Y02P 20/10: Process efficiency
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- B01L: CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present application relates to an apparatus and method for purifying cumene. The apparatus and method for purifying cumene according to the present application can reduce the amount of energy consumption which occurs during purification processes and can provide an apparatus and method capable of efficiently purifying cumene.

## Claims

### Claim at position 1

-7. (canceled)

### Claim 8

A method for purifying cumene, the method comprising:
a light material removal process in which a stream from an alkylation reaction unit is introduced to a lights cut column to be removed of lights and water;
a benzene separation process in which a stream from a transalkylation reaction unit and a stream discharged through a lower portion of the lights cut column are introduced to a benzene column to be separated into benzene and a cumene stream;
a cumene separation process in which the cumene stream separated above is introduced to a cumene column to be separated into cumene and a polyisopropylbenzene stream; and
a polyisopropylbenzene separation process in which the polyisopropylbenzene stream separated above is introduced to a polyisopropyl column to be separated into polyisopropylbenzene and heavy materials.

### Claim 9 (depends on 8)

The method of claim 8, wherein the light material removal process further includes introduction of benzene to a benzene input line which is installed in a front end portion.

### Claim 10 (depends on 8)

The method of claim 8, further comprising:
a process of passing the cumene discharged at an upper portion of the cumene column through a heat exchanger of the benzene column.

### Claim 11 (depends on 8)

The method of claim 8, wherein a temperature at a lower portion of the benzene column is maintained in a range of 130° C. to 200° C.

### Claim 12 (depends on 8)

The method of claim 8, wherein a temperature at an upper portion of the cumene column is maintained in a range of 140° C. to 210° C.

### Claim 13 (depends on 8)

The method of claim 8, wherein the benzene column and cumene column are operated in a way so as to satisfy Mathematical Formula 1 below:
T3-T2>10° C. [Mathematical Formula 1]
(In the Mathematical Formula 1 above, T2 is the temperature at a lower portion of the benzene column, and T3 is the temperature at an upper portion of the cumene column).

### Claim 14 (depends on 8)

The method of claim 8, wherein an internal pressure of the benzene column is maintained in a range of 10 kPa to 230 kPa.

### Claim 15 (depends on 8)

The method of claim 8, further comprising:
a process of passing the polyisopropylbenzene discharged at an upper portion of the polyisopropylbenzene column through one or more heat exchangers selected among a heat exchanger of the benzene column and a heat exchanger of the cumene column.