# US 7,411,104 B2 · Method for producing polybutene

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- Number: US 7,411,104 B2
- Document ID: US7411104B2
- Status: Granted
- Kind: B2
- Application number: 11/390,880
- Filed: 2006-03-28
- Published: 2006-08-31
- Granted: 2008-08-12
- Earliest claimed: 2000-11-13
- Assignees: Daelim Industrial Co., Ltd.
- Inventors: Hyun-Ki Yun; Byeong-Gyu Lim; Myeong-Seog Kim; Se-Saeng Oh; Jae-Hoon Uhm
- Web page: https://patentgrep.com/patent/US7411104B2

## CPC

- C08F 10/08: Butenes
- C08F 110/10: Isobutene
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

A method for producing high reactive polybutene (HRPB), in which carbon-carbon double bond is positioned at an end of polybutene, is disclosed. The high reactive polybutene having 300˜5000 of number average molecular weight (Mn) can be produced from a raw material containing isobutene, wherein a polymerization reaction of the isobutene is carried out in the presence of a catalyst system including secondary alkylether, tertiary alcohol, and boron trifluoride, the amount of boron trifluoride is 0.05˜1.0 weight part per 100 weight part of isobutene, the mole ratio of a co-catalyst including secondary alkylether and tertiary alcohol:boron trifluoride is 1.0˜2.0:1, and the mole ratio of secondary alkylether:tertiary alcohol is 0.5˜1.2:1.

## Claims

### Claim 1

A method for producing high reactive polybutene having 300˜5000 of number average molecular weight (Mn) from (a) isobutene, (b) C4 hydrocarbon compounds derived from cracking of naphtha, and containing more than 10 weight % of isobutene, or (c) C4 hydrocarbon compounds derived from a refining process of crude oil or from catalytic cracking of heavy gas oil, and containing more than 10 weight % of isobutene,
wherein a polymerization reaction of the isobutene is carried out in the presence of a catalyst system comprising secondary alkylether, tertiary alcohol, and boron trifluoride, the amount of boron trifluoride is 0.05˜1.0 weight part per 100 weight part of isobutene, the mole ratio of a co-catalyst including secondary alkylether and tertiary alcohol:boron trifluoride is 1.0˜2.0:1, and the mole ratio of secondary alkylether:tertiary alcohol is 0.5˜1.2:1.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the secondary alkylether is selected from the group consisting of diisopropylether, di(sec-butyl)ether, di(sec-hexyl)ether, di(sec-octyl)ether and mixtures thereof.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the tertiary alcohol is selected from the group consisting of t-butylalcohol, 4-hydroxy-4-methyl-2-pentanone, 2-methyl-2-butanol and mixtures thereof.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the polymerization reaction is carried out at the temperature of −50˜20° C.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the catalyst system further includes one or more solvent selected from the group consisting of chloromethane, dichloromethane, and chloroform.

### Claim 6

A method of producing high reactive polybutene, comprising the steps of:
preparing a catalyst system including secondary alkylether, tertiary alcohol, and boron trifluoride;
introducing the catalyst system to a polymerizing reaction of (a) isobutene, (b) C4 hydrocarbon compounds derived from cracking of naphtha and containing more than 10 weight % of isobutene, or (c) C4 hydrocarbon compounds derived from a refining process of crude oil or from catalytic cracking of heavy gas oil and containing more than 10 weight % of isobutene, to form a polymerization product; and
stripping the polymerization product to generate high reactive polybutene having a 300˜5000 number average molecular weight, wherein the amount of boron trifluoride is 0.05˜1.0 weight part per 100 weight part of isobutene, the mole ratio of a co-catalyst including secondary alkylether and tertiary alcohol:boron trifluoride is 1.0˜2.0:1, and the mole ratio of secondary alkylether:tertiary alcohol is 0.5˜1.2:1.