Pentaerythritol
From Free net encyclopedia
Image:Pentaerythritol.png Pentaerythritol is a polyol used in the fabrication of PETN, alkyd resins, varnishes, PVC stabilizers, tall oil esters, olefin antioxidants, and pentaerythritol triacrylate.
Properties and description
It is a white, crystalline odorless solid, with melting point 260.5 °C and boiling point 276 °C at 30 mm Hg. It is also known under names Hercules P 6, monopentaerythritol, tetramethylolmethane, THME, PETP, pentaerythrite, Pentek.
Preparation
It can be prepared by condensation of acetaldehyde and formaldehyde in a basic environment. The process occurs by successive aldol condensations followed a Cannizaro reaction. The result contains dipentaerythritol and tripentaerythritol as impurities.
CH3CHO + 4 CH2O + 1/2 Ca(OH)2 -> C(CH2OH)4 + 1/2 (HCOO)2Ca
Template:Organic-compound-stubde:Pentaerythrit lv:Pentaeritrīts sl:Pentaerititol ru:Пентаэритрит