Claims
- 1. In a process for catalytically preparing a tetrahydrofuran/alkylene oxide polymer, the improvement comprising using as the catalyst a material prepared by
- (a) holding a raw granular Wyoming bentonite at a temperature of about 300.degree.-600.degree. C. for about 1-20 hours, in air;
- (b) impregnating the product of (a) with an organic liquid capable of being intercalated into said product; p1 (c) activating the product of (b) with hydrochloric acid, nitric acid, sulfuric acid or phosphoric acid;
- (d) removing residual acid from the product of (c); and then
- (e) washing the product of (d) with water until it is substantially free of acid anions.
- 2. The process of claim 1 wherein the alkylene oxide is ethylene oxide.
- 3. The process of claim 1 wherein the alkylene oxide is propylene oxide.
- 4. The process of claim 1 in which residual organic liquid from step (b) is removed before step (c) is performed.
- 5. The process of claim 1 having the additional step of drying the product of step (e) at a temperature below about 150.degree. C.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a divisional of application Ser. No. 034,604, filed Apr. 30, 1979, now U.S. Pat. No. 4,235,751.
US Referenced Citations (9)
Foreign Referenced Citations (1)
Number |
Date |
Country |
854958 |
Nov 1960 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Sud-Chemie, A. G., Product Bulletin, "K-Catalysts", 17 pages, Jul. 1976. |
Divisions (1)
|
Number |
Date |
Country |
Parent |
34604 |
Apr 1979 |
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