摘要:
In a process for converting oxygenated feedstock, such as methanol and dimethyl ether into liquid hydrocarbons, in which the feedstock is first contacted with a zeolite catalyst to produce C 2 -C 4 olefins and C 5 + hydrocarbons, and in which C, + oiefins are then contacted with oligomerization catalyst comprising medium-pore, shape-selective acidic zeolite at increased pressure to produce gasoline and/or distillate liquids, lower alkenes in the form of ethene and/or olefinic gasoline are recycled to the first catalyst stage.
摘要:
The efficiency of converting C 1 -C 3 monohydric alcohols, particularly methanol, related oxygenates and/or oxygenates produced by Fischer-Tropsch synthesis into light olefins, gasoline boiling range hydrocarbons and/or distillate boiling range hydrocarbons in a dense fluidized bed of ZSM-5 type zeolite catalyst is improved by including horizontally-disposed tubular baffles in the dense fluidized bed. The baffles may also serve an indirect heat exchange function.
摘要:
Heat generated during the catalytic conversion of oxygenate reactants to hydrocarbons, e.g., conversion of methanol to gasoline, is recovered by transferring heat of reaction from hot catalyst particles to a liquid-phase heat exchange medium. The resulting heated liquid-phase heat exchange medium is then subsequently maintained in heat exchange relationship with water to thereby convert the water to steam.
摘要:
In a two-step process for producing hydrocarbons an alcohol (e.g. methanol) is first contacted with a ZSM-5 catalyst in a fluid bed reaction zone (4) to effect 80-95% conversion. The feed and the catalyst are then separated and a first part of the catalyst is sent to a cooling zone (30), while a second part is sent to a regeneration zone (36). The first. reaction product is contacted in a second, fixed bed reaction zone (50) with a ZSM-5 catalyst to complete the alcohol conversion.
摘要:
Methanol is dehydrated (10) to dimethyl ether which is catalytically converted into gasoline boiling-range components; the conversion catalyst is disposed in a plurality of reactors (20, 30) so arranged that each downstream reactor (30) can be operatively connected in series to the upstream reactor(s) once the catalyst in the immediately preceding upstream reactor (20) has reached a predetermined degree of deactivation.