Abstract
Heteropolyanion-doped polypyrrole can serve as a catalyst for ethyl alcohol conversion. The insertion of 12-molybdophosphoric anions into the polymer matrix significantly changes the selectivity of the catalyst with respect to unsupported crystalline H 3PMo 12O 40. For example catalytic conversion of ethyl alcohol carried out on polypyrrole containing 75.5 wt.% of 12-molybdophosphoric anions and standardized by heating in helium, gives acetaldehyde as the main product (51%). On the acid-base centers ethylene (45%) and small amounts of diethyl ether (3.5%) are formed. Standardization of the catalyst by heating in air leads to heavy crosslinking of the polymer with simultaneous restoration of acid molecules. As a result, the selectivity and activity of this catalyst are similar to those of unsupported H 3PMo 12O 40.
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