Al. Balashov et al., PREPARATION OF 1,3,5-TRIOXANE BY HOMOGENEOUS CATALYSIS WITH HETEROPOLY ACIDS, Russian journal of applied chemistry, 71(6), 1998, pp. 1014-1016
Formation of trioxane and Cannizzaro reaction at 96.5 degrees C in the
presence of heteropoly acids as catalysts in aqueous solutions contai
ning 54-56 wt% of formaldehyde were studied.