Process for the preparation of brominated pentaerythritols

Details Process for the preparation of brominated pentaerythritols Process for the preparation of brominated pentaerythritols

1973-05-24

1976-01-13

Mars, Howard T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260488J, 260333, 260654R, C07C 3134

Patent

active

039325415

ABSTRACT:
Brominated pentaerythritols are prepared at reaction temperatures of from about 85.degree. to 135.degree.C. by reacting pentaerythritol with HBr in the liquid phase employing a solvent medium containing from about 0.8 to about 25 mole percent of an aliphatic carboxylic acid of 2 to 8 carbon atoms and their anhydrides, based on the pentaerythritol. The HBr is fed continuously to the reactor throughout the reaction. The water formed as a result of the reaction remains in the reaction mixture until substantial completion of the reaction. The product can be predominantly dibromoneopentyl glycol or tribromoneopentyl alcohol and is characterized by the absence of tar formation.

REFERENCES:
Zelinsky et al. Ber. 46 (1913) 163-164.
Geiseler et al., Z. Naturforsch 22A (1967) 1511-1516.

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