Selective hydrogenation of acetylenes and dienes in a hydrocarbon stream

   
   

Acetylenes and dienes in a stream containing hydrogen, methane, C.sub.2 -C.sub.6 olefins and paraffins, C.sub.2 -C.sub.6 acetylenes and dienes, benzene, toluene, xylenes, and other C.sub.6 + components are hydrogenated in a downflow boiling point reactor wherein the heat of reaction is absorbed by the liquid in the reactor which produces a vapor. Besides the feed to the reactor there is a recirculating stream which is fed at a rate sufficient to ensure that the catalyst particles within the reactor are wetted. A third stream, which is taken from a downstream distillation column, is fed to provide the make up mass corresponding to the mass evaporated in the reactor. The composition of the this third stream controls the steady state composition of the liquid flowing through the reactor.

Acetilenos e dienes em um córrego que contem o hidrogênio, methane, C.sub.2 - os olefins C.sub.6 e parafinam, C.sub.2 - os acetilenos C.sub.6 e os dienes, benzene, toluene, xylenes, e outro C.sub.6 + componentes hydrogenated em um reator do ponto fervendo do downflow wherein o calor da reação é absorvido pelo líquido no reator que produz um vapor. Além da alimentação ao reator há um córrego recirculador que seja alimentado em uma taxa suficiente se assegurar de que as partículas do catalizador dentro do reator estejam molhadas. Um terceiro córrego, que seja feito exame de uma coluna downstream do distillation, é alimentado para fornecer acima corresponder maciço do make à massa evaporada no reator. A composição deste terceiro córrego controla a composição do estado constante do líquido que corre através do reator.

 
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