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Butyl Rubber

TECHNOLOGY FOR THE PRODUCTION OF BUTYL RUBBER (IIR) AND HALOBUTYL RUBBER (HIIR)


PROCESS FEATURES
Butyl rubber (IIR) is an elastomeric copolymer of isobutylene with small amounts of isoprene, offered in a range of polymer grades.
Halogenating the isoprene groups in IIR produces a rubber which could co-cure with elastomers such as NR, BR and SBR while preserving the essential properties of IIR. The commercial halobutyl rubbers, bromobutyl (BIIR) and chlorobutyl (CIIR), are more easily vulcanized than IIR.
The major application area is the tire industry, mainly, as IIR, for inner tubes and tire curing bladders and, as HIIR, for inner liners.
The CONSER process, developed with the support of consultants and specialists having experience in production of butyl rubber, belongs to the well established slurry polymerization process, practiced by the leading world producers of butyl rubber.
CONSER can offer a technology for the production of butyl rubber (IIR) and halo-butyl rubber (HIIR) fully competitive as consumption of raw materials, utilities and chemicals and as quality of the products.

REFERENCES

Company Location Capacity T/y
SIR  Italy  30000 (Only IIR)
YNCC   Korea  50000 (project study IIR and HIIR )
FSRC (NYPC group) China  100000 (IIR and HIIR)
SINCIER  China  50000 (IIR and HIIR)
CHAMBROAD  China  50000 (IIR and HIIR)

 

FLOW SHEET

BUTYL RUBBER S001 R

PROCESS DESCRIPTION

IIR HIIR PROCESS

The butyl rubber technology offered by CONSER is based on the following main steps:
• Polymerization
• Recycle compression and purification
• Finishing

Polymerization

The butyl rubber is produced by co-polymerizing isobutylene with a small amount of isoprene, in a solution with methylchloride, at low temperature (close to –100°C) and with aluminum chlorides as catalyst. In the flash vessel water replaces the organic solvent, thus producing a water slurry.

Recycle compression and purification

Unreacted monomers and solvent are flashed, compressed, dried and fractionated in a sequence of distillation columns to recover solvent and isobutylene, both recycled to the polymerization section, while all the impurities are purged out.

Finishing

The water polymer slurry from the reaction section is sent directly to the finishing, where it is dried, pressed, baled and packaged.

HIIR PROCESS

Part of the water polymer slurry from the polymerization is fed to the halogenation section:
here the water is replaced with hexane to produce a polymer solution which is fed first to the halogenation reactors and then to the neutralization system.
The hexane is finally removed and replaced again with water. The water slurry is dried, pressed, baled and packaged in a second finishing line.

PRODUCT APPLICATIONS

 

 

 

 

 

 

 

 

 

 

 

 

 

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P.le Ezio Tarantelli, 100
00144 Rome - Italy

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Tel. (+39) 06 5262001
Fax (+39) 06 5205249

CF e n° reg. imp.: 00875210585
partita iva: 00938941002 
capitale sociale: € 130.800,00 i.v.
rea: 327729 trib. RM 318/70

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