Reducing the content of oligomeric cyclic ethers in polyoxybutyl

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

1985-02-28

1986-04-29

Mars, Howard T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604105, 2604106, 568617, 568607, 568614, 568621, 560240, C09F 508, C11C 300, C07C 4311

Patent

active

045855927

ABSTRACT:
In polyoxybutylene polyoxyalkylene glycols obtained by copolymerization of tetrahydrofuran with a 1,2-alkylene oxide in the presence of a compound containing reactive hydrogen and under the catalytic action of a bleaching earth, the content of oligomeric cyclic ethers is reduced by distillation under reduced pressure at above 200.degree. C. after first treating the copolymer with oxygen or an oxygen-containing gas (air) at a temperature of from 20.degree. to 110.degree. C.

REFERENCES:
patent: 4127513 (1978-11-01), Bellis
patent: 4228272 (1980-10-01), Del Pesco
patent: 4251654 (1981-02-01), Robinson et al.

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