Purification of styrene monomer by multi-point injection of...

Details Purification of styrene monomer by multi-point injection of... Purification of styrene monomer by multi-point injection of...

C - Chemistry, Metallurgy

07

C

C07C 7/167 (2006.01) C07C 5/09 (2006.01) C07C 5/333 (2006.01) C07C 15/46 (2006.01) C08F 112/08 (2006.01)

Patent

CA 2052685

Processes and apparatus are disclosed for the catalytic purification of styrene monomer by hydrogenating the phenylacetylene contaminant therein to styrene in a catalytic bed using multiple hydrogen injection; dilution of the hydrogen by a diluent such as nitrogen; mixing the hydrogen with a catalyst- selectivity improver such as carbon monoxide; using ethylbenzene dehydrogenation ventgas to supply hydrogen; and, using a multiple-catalyst-bed-reactor, or multiple reactors, each with a single catalyst bed. One preferred phenylacetylene reduction catalyst used is palladium on an alumina carrier.

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