摘要:
Disclosed herein is a method comprising the steps of: a) producing a hydrocarbon stream from syngas via a Fischer-Tropsch reaction, wherein the hydrocarbon stream comprises a first C2 hydrocarbon stream comprising ethane and a first ethylene product; b) separating at least a portion of the first C2 hydrocarbon stream from the hydrocarbon stream; c) separating at least a portion of the first ethylene product from the first C2 hydrocarbon stream, thereby producing a second C2 hydrocarbon stream; d) converting at least a portion of the ethane in the second C2 hydrocarbon stream to a second ethylene product; and e) producing ethylene oxide from at least a portion of the second ethylene product.
摘要:
A method for producing high density fuels from isoprene which can be produced via biosynthetic routes using biomass sugars as feedstock. This allows for the production of isoprene and isoprene-derived fuels from abundant waste materials with the potential to significantly reduce DoD carbon emissions. Embodiments of the invention describe a method for conversion of isoprene to full performance jet and diesel fuels. Isoprene can be selectively oligomerized to generate a distribution of branched chain hydrocarbons. Combination of an oligomerization catalyst with a metathesis catalyst allows for the synthesis of high density cyclic fuels with performance advantages (increased density and volumetric net heat of combustion) over conventional petroleum-based fuels.
摘要:
In a process for producing phenol, benzene is hydroalkylated with hydrogen in the presence of a catalyst under conditions effective to produce a hydroalkylation reaction product comprising cyclohexylbenzene and cyclohexane. At least a portion of the cyclohexane from said hydroalkylation reaction product is then dehydrogenated to produce a dehydrogenation effluent comprising benzene, toluene and hydrogen. At least a portion of the dehydrogenation effluent is washed with a benzene-containing stream to transfer at least a portion of the toluene from the dehydrogenation effluent to the benzene-containing stream.
摘要:
Apparatuses and methods are disclosed for contacting radially flowing fluids with solid particles (e.g., catalyst) with reduced tendency for fluidization of the particles, and especially a sealing portion of the particles at the top of a particle retention zone disposed between screens at upstream and downstream positions relative to radial fluid flow. Fluidization is reduced or eliminated by offsetting openings of the screens in the axial direction, such that upstream openings in the upstream screen are above highest downstream openings in a downstream stream. The offset in openings imparts a downward flow component to radially flowing fluid, thereby reducing solid particle fluidization without the need to induce a specific pressure drop profile along the entire axial direction of the screens.
摘要:
Apparatuses and methods are disclosed for contacting radially flowing fluids with solid particles (e.g., catalyst) with reduced tendency for fluidization of the particles, and especially a sealing portion of the particles at the top of a particle retention zone disposed between screens at upstream and downstream positions relative to radial fluid flow. Fluidization is reduced or eliminated by offsetting openings of the screens in the axial direction, such that upstream openings in the upstream screen are above highest downstream openings in a downstream stream. The offset in openings imparts a downward flow component to radially flowing fluid, thereby reducing solid particle fluidization without the need to induce a specific pressure drop profile along the entire axial direction of the screens.
摘要:
The present invention relates to a catalyst comprising at least one metal loaded on a hydrotalcite-based carrier material which has the following formula in its uncalcined form: M2+aM3+b(An−)(OH)2a+3b−n*xH2O, wherein M2+ is at least one divalent metal; and M3+ is at least one trivalent metal; A is an n-valent anion, n is 1 or 2 and a and b are positive numbers, a>b. When said at least one metal is selected from the group VIII of the periodical system of the elements a useful (de)hydrogenation catalyst is achieved.
摘要翻译:本发明涉及一种催化剂,其包含负载在水滑石类载体材料上的至少一种金属,其具有下列未煅烧形式的式:M 2 + (OH)2(OH)2 + 3 + b 2 * x H 2(A) 其中M 2 +是至少一种二价金属; 和M 3+是至少一种三价金属; A是n价阴离子,n是1或2,a和b是正数,a> b。 当所述至少一种金属选自元素周期性系统的VIII族时,实现了有用的(de)氢化催化剂。
摘要:
Described is a method for operating and shutting down a dehydrogenation reactor that contains a volume of dehydrogenation catalyst. After termination of the introduction of a dehydrogenation feed into the dehydrogenation reactor that is operated under dehydrogenation reaction conditions, a first cooling fluid comprising steam is introduced into the reactor for a first time period sufficient to cool the dehydrogenation catalyst contained in the dehydrogenation reactor to a second temperature. The introduction of the first cooling fluid is terminated followed by the introduction of a second cooling fluid for a second time period sufficient to cool the dehydrogenation catalyst contained in the dehydrogenation reactor to a third temperature that allows for the handling and removal of the dehydrogenation catalyst from the dehydrogenation reactor.
摘要:
A process for catalytic dehydrogenation of a dehydrogenatable hydrocarbon process stream to the corresponding olefin or olefins, the process comprising contacting the dehydrogenatable hydrocarbon process stream under dehydrogenation conditions with a mesoporous zeotype catalyst having an intra-crystalline, non-crystallographic mesopore system and a mesopore volume of the zeotype crystals above 0.25 ml/g and comprising at least one element belonging to Groups 5-14 in the Periodic Table of the Elements (new notation). The invention also comprises a catalyst for use in the above process.
摘要:
The present invention relates to calcipotriol hydrate--a new crystalline form of calcipotriol--with superior technical properties and with superior stability.
摘要:
Dual-flow chemical reactor cores containing catalytic heat-transfer walls comprising both a gas-impervious material and a suitable catalyst which allows oxidative coupling of methane into higher hydrocarbons, dual-flow reactors having these catalytic heat-transfer walls to control and facilitate simultaneously coupling of methane and cracking of hydrocarbon compounds in separate gas streams, and chemical processes which combine coupling of methane and cracking of hydrocarbon compounds to make olefins in a dual-flow reactor having catalytic heat-transfer walls.