SciELO - Scientific Electronic Library Online

 
vol.35 issue1Assessment of hydrochemical quality of ground water under some urban areas within sana'a secreteriat author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Eclética Química

Print version ISSN 0100-4670

Abstract

MORTAHEB, H.R. et al. Optimization of NMP extraction in 1, 3-butadiene production line. Eclet. Quím. [online]. 2010, vol.35, n.1, pp. 85-89. ISSN 0100-4670.  http://dx.doi.org/10.1590/S0100-46702010000100010.

N-methylpyrrolidone is a powerful solvent for variety of chemical processes due to its vast chemical properties. It has been used in manufacturing processes of polymers, detergents, pharmaceuticals rubber and many more chemical substances. However, it creates large amount of residue in some of these processes which has to be dealt with. Many well known methods such as BASF in rubber producing units have tried to regenerate the solvent at the end of each run, however, there is still discarding of large amount of residue containing NMP, which over time, could cause environmental concerns. In this study, we have tried to optimize regeneration of the NMP extraction from butadiene production. It is shown that at higher temperatures NMP is separated from the residue with close to 90% efficiency, and the solvent residue proved to be the most effective with a 6: 1 ratio.

Keywords : NMP; Extraction; n-heptane; Distillation.

        · text in English     · pdf in English