The present disclosure relates to a process and a production unit that are used to catalytically manufacture olefin trimers from olefin monomers, and wherein olefin dimers are recycled after dimerization reaction, and reacted with olefin monomers in an addition reaction.

Processes and systems for C.sub.3+ monoolefin conversion. In some examples, the process can include reacting a first mixture that includes C.sub.3+ monoolefins and a first oxygenate to produce a first effluent that includes a first ether and <1 wt. % of any first di-C.sub.3+ olefin. A first product that includes the first ether and a first byproduct that includes at least a portion of any first di-C.sub.3+ olefin and unreacted C.sub.3+ monoolefins can be separated from the first effluent. A second olefin mixture, at least a portion of the first byproduct, and a second oxygenate can be combined to produce a second mixture. The second mixture can be reacted to produce a second effluent that includes a second ether and a second di-C.sub.3+ olefin. The reaction of the second mixture can produce a greater amount, on a mole basis, of the second di-C.sub.3+ olefin than the second ether.

Processes and systems for C.sub.3+ monoolefin conversion. In some examples, the process can include reacting a first mixture that includes C.sub.3+ monoolefins and a first oxygenate to produce a first effluent that includes a first ether and <1 wt. % of any first di-C.sub.3+ olefin. A first product that includes the first ether and a first byproduct that includes at least a portion of any first di-C.sub.3+ olefin and unreacted C.sub.3+ monoolefins can be separated from the first effluent. A second olefin mixture, at least a portion of the first byproduct, and a second oxygenate can be combined to produce a second mixture. The second mixture can be reacted to produce a second effluent that includes a second ether and a second di-C.sub.3+ olefin. The reaction of the second mixture can produce a greater amount, on a mole basis, of the second di-C.sub.3+ olefin than the second ether.

Processes and systems for C.sub.3+ monoolefin conversion. In some examples, the process can include reacting a first mixture that includes C.sub.3+ monoolefins and a first oxygenate to produce a first effluent that includes a first ether and <1 wt. % of any first di-C.sub.3+ olefin. A first product that includes the first ether and a first byproduct that includes at least a portion of any first di-C.sub.3+ olefin and unreacted C.sub.3+ monoolefins can be separated from the first effluent. A second olefin mixture, at least a portion of the first byproduct, and a second oxygenate can be combined to produce a second mixture. The second mixture can be reacted to produce a second effluent that includes a second ether and a second di-C.sub.3+ olefin. The reaction of the second mixture can produce a greater amount, on a mole basis, of the second di-C.sub.3+ olefin than the second ether.

A process can be used for oligomerization of isobutene by conversion of an isobutene-containing hydrocarbon stream over an acid catalyst in at least one reaction stage, where a particular ratio of recycle to feed is employed.

A process can be used for oligomerization of isobutene by conversion of an isobutene-containing hydrocarbon stream over an acid catalyst in at least one reaction stage, where a particular ratio of recycle to feed is employed.

The present invention discloses an integrated process and an apparatus for production of various alcohols and Oligomerization of Olefinic feed stocks comprising butylenes and mixture thereof. In this process the combined light olefinic hydrocarbon feedstock is divided into two streams and contacted in two different reaction zones, viz. hydration and oligomerization. The mixture of alcohols and oligomer product from hydration reaction is separated and the bottom stream from separator is routed to oligomerization reaction zone in a controlled quantity as selectivity enhancer. Both the reaction zones are operated at different conditions. The product from oligomerization zone is further separated in to lighter and heavier components. Each reaction zone may comprise series of reactors filled with acidic catalysts comprising ion exchange resins.

The present invention discloses an integrated process and an apparatus for production of various alcohols and Oligomerization of Olefinic feed stocks comprising butylenes and mixture thereof. In this process the combined light olefinic hydrocarbon feedstock is divided into two streams and contacted in two different reaction zones, viz. hydration and oligomerization. The mixture of alcohols and oligomer product from hydration reaction is separated and the bottom stream from separator is routed to oligomerization reaction zone in a controlled quantity as selectivity enhancer. Both the reaction zones are operated at different conditions. The product from oligomerization zone is further separated in to lighter and heavier components. Each reaction zone may comprise series of reactors filled with acidic catalysts comprising ion exchange resins.

Provided is a method for producing p-xylene, comprising: a provision step of providing a C4 fraction comprising at least isobutene as a product formed by fluidized catalytic cracking of a heavy oil fraction; a dimerization step of bringing a first raw material comprising the isobutene into contact with a dimerization catalyst to produce a C8 component comprising a dimer of isobutene; and a cyclization step of bringing a second raw material comprising the C8 component with a dehydrogenation catalyst to produce p-xylene through a cyclization/dehydrogenation reaction of the C8 component.

Provided is a method for producing p-xylene, comprising: a provision step of providing a C4 fraction comprising at least isobutene as a product formed by fluidized catalytic cracking of a heavy oil fraction; a dimerization step of bringing a first raw material comprising the isobutene into contact with a dimerization catalyst to produce a C8 component comprising a dimer of isobutene; and a cyclization step of bringing a second raw material comprising the C8 component with a dehydrogenation catalyst to produce p-xylene through a cyclization/dehydrogenation reaction of the C8 component.