# US 4,392,004 A · Reduction of cyclopentadiene from isoprene streams

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- Number: US 4,392,004 A
- Document ID: US4392004A
- Status: Granted
- Kind: A
- Application number: 06/350,913
- Filed: 1982-02-22
- Granted: 1983-07-05
- Earliest claimed: 1982-02-22
- Assignees: The Goodyear Tire & Rubber Company
- Inventors: Richard M. D'Sidocky
- Web page: https://patentgrep.com/patent/US4392004A

## CPC

- C07C 7/1485: {oxides; hydroxides; salts (C07C7/156 takes precedence)}
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

A process for reducing the level of cyclopentadiene present in a hydrocarbon stream containing isoprene and cyclopentadiene which involves contacting the stream with a base wherein said base is selected from the group consisting of potassium hydroxide, sodium hydroxide and potassium fluoride. The base is situated on activated carbon carrier.

## Claims

### Claim 1

A process for the removal of small amounts of CPD from a C-5 hydrocarbon stream containing isoprene comprising contacting said stream with an LHSV value of from 0.5 to 30 and a temperature of from 0.degree. C. to 100.degree. C. with a base on an activated carbon carrier wherein said base is selected form the group consisting of KOH, NaOH and KF.

### Claim 2 (depends on 1)

A process as claimed in claim 1 wherein said base is KOH.

### Claim 3 (depends on 1)

A process as claimed in claim 1 wherein said base is NaOH.

### Claim 4 (depends on 1)

A process as claimed in claim 1 wherein said base is KF.