Process for preparing a tetrahydrofuran-alkylene oxide copolymer

Details Process for preparing a tetrahydrofuran-alkylene oxide copolymer Process for preparing a tetrahydrofuran-alkylene oxide copolymer

1980-05-30

1982-05-11

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From heterocyclic reactant containing as ring atoms oxygen,...

528403, 528408, 528413, 568613, 568617, C08G 6520

Patent

active

043294456

ABSTRACT:
A modified montmorillonite clay is prepared by heating it, impregnating it with an organic liquid, acid-activating it with a strong acid, and then washing it with water until it is substantially free of acid anions. The modified clay is useful as a catalyst, particularly for the preparation of tetrahydrofuran/alkylene oxide copolymers.

REFERENCES:
patent: 3201197 (1965-08-01), Showalter
patent: 3213037 (1965-10-01), Hodgkiss
patent: 3328467 (1967-06-01), Hamilton
patent: 3412039 (1968-11-01), Miller
patent: 3997563 (1976-12-01), Dale et al.
patent: 4087383 (1978-05-01), Gernand et al.
patent: 4127513 (1978-11-01), Bellis
patent: 4228272 (1980-10-01), Del Pesco
patent: 4235751 (1980-11-01), Del Pesco
Sud-Chemie, A. G., Product Bulletin, "K-Catalysts", 17 pages, Jul. 1976.

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