Reducing the content of cyclic oligomeric ethers in polytetramet

Details Reducing the content of cyclic oligomeric ethers in polytetramet Reducing the content of cyclic oligomeric ethers in polytetramet

1986-03-21

1987-01-20

Mars, Howard T.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568621, C07C 4138

Patent

active

046380973

ABSTRACT:
The content of cyclic oligomeric ethers in polytetramethylene ether glycols or polyoxybutylene polyoxyalkylene glycols is reduced by a process in which a polytetramethylene ether glycol or polyoxybutylene polyoxyalkylene glycol which contains the said ethers and has a mean molecular weight of from 200 to 450 is mixed with a mixture of water and a hydrocarbon, and, after phase separation, the purified polytetramethylene ether glycol or polyoxybutylene polyoxyalkylene glycol is isolated from the aqueous phase.

REFERENCES:
patent: 3478104 (1964-11-01), McConnell
patent: 4189566 (1980-03-01), Mueller et al.
patent: 4251654 (1981-02-01), Robinson et al.
patent: 4500705 (1985-02-01), Copelin

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