| abstract |
1 / 1 abstract “method for the production of an ethylenically unsaturated carboxylic acid or ester, and catalyst system†a method of producing an ethylenically unsaturated carboxylic acid or ester, typically î±, is ethylenically unsaturated is described. the method comprises the steps of contacting formaldehyde, or a source of formaldehyde, with a carboxylic acid or ester in the presence of a catalyst and, optionally, in the presence of an alcohol. the catalyst comprises shaped or sheet or plate type barium phosphate crystals, or a source thereof. a catalyst system is also described. the catalyst system comprises a crystalline barium phosphate catalyst and, optionally, a catalyst support. |