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PTMEG

TECHNOLOGY FOR THE PRODUCTION OF PTMEG

PROCESS FEATURES
The technology for the production of PolyTetraMethylene EtherGlycol (PTMEG) could be available through CONSER .
Different types (or grades) of PTMEG may be produced, classified according the average molecular weight of the polymer.
CONSER, has been co-inventor of the process performing extensive research in the laboratories and pilot units of the SISAS group. The complete basic design of a large PTMEG plant to be erected in Belgium has been executed, the construction of the plant has been stopped due to financial problems of the SISAS group.

REFERENCES

Company Location Capacity T/y
POLIDIOL  Belgium  50000
SHANXI SANWEI  China  30000 (under way)

 

FLOW SHEET

PTMEG A199 PFD 02 R

PROCESS DESCRIPTION
The PTMEG technology is based on the following major steps:

Polymerization

The polymerization of tetrahydrofuran (THF) is a classic example of cationic ring-opening polymerization.
THF is polymerized over a heterogeneous catalyst in presence of acetic anhydride to form polytetramethylene ether diacetate (PTMEA) Non converted THF, recovered from the reactor effluent by stripping, is purified and recycled to the reactor. Minor amount of by products are separated and disposed.

Alcoholysis

The ester PTMEA is converted to PTMEG by reacting with an excess of methanol in presence of a basic catalyst. Methylacetate (MEAC) is formed as by product. The alcoholysis section includes equipment for neutralization of crude product, filtration, recovery of purified methanol and disposal of methanol-MEAC azeotrope.

Finishing

The finishing section includes equipment for removal of oligomers from crude PTMEG by vaporization at high vacuum, and for introduction of additives to the finished polymer.


P.le Ezio Tarantelli, 100
00144 Rome - Italy

e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

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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