| http://www.w3.org/ns/prov#value | - Since the reaction temperature in reaction zone B is normally above 250??? C., trioxane is thus a formaldehyde source favorable in accordance with the invention for production of reaction gas input mixture B. Since trioxane also has comparatively good solubility in water and in alcohols such as methanol, it is also possible to use corresponding trioxane solutions as the formaldehyde source suitabl
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