section_heading: Dobivanje
paragraph_text: 3 HCHO + CH<sub>3</sub>CHO --> (Ca(OH)<sub>2</sub>) --> (HOCH<sub>2</sub>)<sub>3</sub>CCHO --> (HCHO - Ca(OH)<sub>2</sub>) --> (HOCH<sub>2</sub>)<sub>4</sub>C /pentaeritritol/ + ½ Ca(OCHO)<sub>2</sub> /kalcijev formijat/