Production of propylene by Skeletal isomerization of isobutanol dehydration and simultaneous acid followed by metathesis Catalysts

摘要

The present Invention relates to a process for the production of propylene in which, in a First Stage, is subjected to an isobutanol dehydration and Skeletal isomerization to produce Olefins substantially simultaneous corresponding, which have the same number of carbons and Consisting essentially of a mixture of N - butanes and ISO butene and, in a Second Stage,The N - butanes undergo metathesis, Said method comprising: a) to introduce in a reactor comprising (a) a current isobutanol, optionally Water, and optionally an Inert Component,(b) contacting the stream with a catalyst in a reactor under conditions effective to dehydrate and isomerizar Skeleton of at least a portion of the isobutanol to produce a mixture of N - butanes and ISO butene, c) recover from such a flow reactor (b), remove the water, C Inert deployment, if it is not turned, and isobutanol, silo,To get a mixture of N - butanes and ISO butene, d) fractionate the mixture to produce a stream of N - butanes (n) and remove the essential part of isobutene optionally recycled with the Flow to the Reactor of dehydration / isomerization STEP (b),(e) to send the current (n) a metathesis Reactor and contacting the current (n) in the Reactor with a catalyst for metathesis, optionally in the presence of effective conditions to produce Ethylene, Propylene, f) recover from such a current (P metathesis reactor ) which essentially comprises propylene, N - butanes no Reaction, Heavy ComponentsEthylene and optionally without reacting, g) split the current (P) to recover and Recycle the propylene optionally - butanes without reacting Ethylene without reacting to the metathesis reactor.