Column for impurities in butadiene?

[GLHolston]

Does anyone know of a column that will seperate all of the impurities in butadiene? I am using an aluminum oxide but methyl acetyle and pentane sometimes coelute and sometimes are swamped out by 1,3-butadiene which is the main peak.

[chromatographer1]

I would suggest that a BMEA SCOT capillary column of 15m or 30m combined with a methyl silicone would solve your problem.

To separate monoolefin isomers from the diene isomers requires a very polar column. In using a polar column certain non-polar hydrocarbons may coelute (pentanes and hexanes, especially). These are not usually present in 1,3-BD.

A multidimensional application is usually dictated for 1,3-BD analysis.
You may call or email me if you wish to discuss this application. It can be done in less than 8 minutes.

Rodney George
Senior Research and Development Scientist
Gas Separations Research
Supelco
595 North Harrison Road
Bellefonte, PA 16823

814-359-5737 voice
814-359-5459 fax
rgeorge@sial.com

[arie2044]

Hi
you can use Alumina oxide/Na sulfate or manganate capillary ( 0.32 mm) or wide bore (0.53 mm) column.and helium as carrier.
with good temperature programing and constant flow you can analyse down to 1 ppm of impurities in 1,3 Butadiene.

we do this.