摘要:
Methods and systems for alkylate production involving a multi-zone alkylation reactor. The multi-zone alkylation reactor includes a plurality of alkylation zones spaced vertically in a series configuration and a partition splitting the plurality of alkylation zones into at least two mechanically separated catalytic volumes.
摘要:
Processes for the direct alkylation of ethylene with isobutane or isopentane using a highly active ionic liquid alkylation catalyst are described. Ethylene is sent to a high-temperature alkylation reactor loop, and C3, C4, and C5 olefins are routed to a low temperature alkylation reactor loop. In each reactor, the olefins are contacted with an excess of isobutane or isopentane in the presence of a highly active ionic liquid catalyst. Portions of the reactor effluent streams are fed to a common downstream catalyst separation and product fractionation sections. The remainder of the reactor effluent is recycled back to the respective alkylation reactor.
摘要:
A continuous mixing reactor has an outer shell having a cylindrical portion with a central section and two opposite conical end sections; a circulation tube within the shell so that an annular passage forms between the shell and the circulation tube; an impeller within and positioned adjacent to one end of the circulation tube; and heat exchange means penetrating the outer shell and extending into the end of the circulation tube opposite the impeller. The outer shell has a hydraulic head forming one end of the shell, a heat exchange medium header at the opposite end of the shell. The circulation tube nearer the heat exchange medium header terminates at or downstream from a tangential plane extending through the shell at the intersection of the central section and the conical end section of the cylindrical portion of shell. The reactor is useful in an alkylation process.
摘要:
Non-cyclic amide or thioamide based ionic liquids and methods of making them are disclosed. The non-cyclic amide or thioamide based ionic liquid comprises a cation and an anion and has the formula:
摘要:
Systems and apparatus for ionic liquid catalyzed hydrocarbon conversion, such as alkylation, using vaporization to remove reaction heat from an ionic liquid reactor and to provide mixing therein, wherein hydrocarbon vapors are withdrawn from the ionic liquid reactor and the withdrawn hydrocarbon vapor is recovered by a hydrocarbon vapor recovery unit in fluid communication with the ionic liquid reactor for recycling condensed hydrocarbons to the ionic liquid reactor. Processes for ionic liquid catalyzed alkylation are also disclosed.
摘要:
A process for converting paraffins, especially light paraffins, e.g. C3-C8 paraffins, to higher boiling range paraffinic liquid hydrocarbons comprises endothermically dehydrogenating the light paraffin combined with a thermally coupled, exothermic reaction such as olefin oligomerization to supply heat for the endothermic conversion.
摘要:
We provide alkylation process units, one comprising: a) a hydrogenation reactor that produces a regenerated catalyst effluent; b) a fractionation unit that separates the effluent into gas and light hydrocarbon; c) a connection between the fractionation unit for transmitting the gas to the hydrogenation reactor; and d) a connection between the fractionation unit and an alkylation reactor to transmit the light hydrocarbon to the alkylation reactor. The other comprising: a) a separator, connected between the hydrogenation reactor and a fractionation unit; that separates the effluent into gas and liquid; and wherein the fractionation unit separates a hydrocarbon stream from the liquid into a light hydrocarbon comprising a hydrogen chloride and an extracted conjunct polymer naphtha; b) a connection between the separator and the hydrogenation reactor for transmitting the gas to the hydrogenation reactor; and c) a connection between the fractionation unit and an alkylation reactor to transmit the light hydrocarbon.
摘要:
We provide processes, and process units for practicing the processes, comprising a. regenerating a used catalyst comprising an ionic liquid catalyst and a chloride, from an alkylation reactor, in a hydrogenation reactor to produce a regenerated catalyst effluent; b. separating at least a portion of the regenerated catalyst effluent into a gas fraction comprising a hydrogen gas and into a light hydrocarbon fraction comprising a hydrogen chloride; c. recycling at least a part of the gas fraction comprising the hydrogen gas to the hydrogenation reactor; and d. recovering at least an amount of the light hydrocarbon fraction comprising the hydrogen chloride and recycling the at least the amount of the light hydrocarbon fraction to the alkylation reactor. The alkylation process units comprise a hydrogenation reactor, a fractionation unit, and connections for transmitting the gas fraction to the hydrogenation reactor and for transmitting the light hydrocarbon fraction to the alkylation reactor.
摘要:
A process for removing cyclopentene from the C5 fraction of a light olefin feed useful in an isoparaffin/olefin alkylation process redistributes fragments of C5 olefins formed by ring opening metathesis (ROM) in the presence of a catalyst. The higher molecular weight olefins produced in the reaction can be blended into the gasoline blend pool without imposing a significant or any vapor pressure penalty. Cyclopentene present in the C5 portion of the feed undergoes various ring opening reactions while other pentenes are converted to hydrocarbon products of lower and higher molecular weight relative to pentene. The reduction in cyclopentene results in a reduced tendency for the formation of acid soluble oil (ASO) during alkylation.
摘要:
An integrated hydrocarbon conversion process is described. The process includes contacting a heavy hydrocarbon feedstock with a hydrocarbon cracking catalyst in a fluidized reactor zone to produce light olefins to form a fluid catalytic cracker (FCC) effluent stream comprising a range of hydrocarbons. The FCC effluent stream is separated to form at least a stream rich in C4 hydrocarbons which comprises isobutane and 1-butene. The stream rich in C4 hydrocarbons is introduced into an alkylation reaction zone where the isobutane and the 1-butene are alkylated to form a reaction product mixture comprising dimethylhexanes and C9+ hydrocarbons. The reaction product mixture is dehydrocyclized to form a stream rich in xylenes.