摘要:
A process for purifying crude terephthalic acid comprising a contaminant at a first concentration, the process comprising contacting the crude terephthalic acid with a solvent comprising an ionic liquid at purifying conditions to produce a solid terephthalic acid product having a second concentration of the contaminant lower than the first concentration.
摘要:
A process for oxidizing an alkyl-aromatic compound is described. The process includes oxidizing the alkyl-aromatic compound to produce a first oxidation product; contacting at least a portion of the first oxidation product, a solvent comprising an ionic liquid, a bromine source, a catalyst, and an oxidizing agent to produce a second oxidation product comprising at least one of an aromatic alcohol, an aromatic aldehyde, an aromatic ketone, and an aromatic carboxylic acid.
摘要:
Methods of producing terephthalic acid are described. The methods involve using a substantially pure 4-CBA stream. The substantially pure 4-CBA stream, a solvent comprising an ionic liquid and optionally a carboxylic acid, a bromine source, a catalyst, and an oxidizing agent are contacted to produce a product comprising terephthalic acid.
摘要:
A process for oxidizing an alkyl-aromatic compound to reduce the level of impurities is described. The solvent pH level controlled to reduce the impurities.
摘要:
A process for oxidizing an alkyl-aromatic compound is described. The process includes contacting the alkyl-aromatic compound, a solvent comprising an ionic liquid, a bromine source, a catalyst, and an oxidizing agent in a first reaction zone to produce a first product comprising a first mother liquor and at least one of an aromatic alcohol, an aromatic aldehyde, an aromatic ketone, and an aromatic carboxylic acid.
摘要:
A method of generating power by passing a dimethyl ether-containing fuel to a dry low NOx combustor of a fired turbine-combustor in the presence of an oxygen-containing gas for combustion in the combustor to form flue gas, and then passing the flue gas to the turbine to generate power, wherein the fuel comprises a mixture of dimethyl ether, at least one alcohol and, optionally, a component selected from the group consisting of water and C1-C6 alkanes. The fuel composition used in the inventive method permits a safe and highly efficient operation of a dry low NOx combustion system, while at the same time, minimizing the generation of NOx and carbon monoxide emissions.
摘要:
A collapsed composition is described which is substantially composed of microcrystallites collectively of the formula:M.sub.2m.sup.2+ Al.sub.2-p M.sub.p.sup.3+ T.sub.r O.sub.7+r.multidot.swhere M.sup.2+ is a divalent metal, M.sup.3+ is a trivalent metal, and T is vanadium, tungsten, or molybdenum.
摘要:
A process for manufacturing a collapsed composition is described in which the manufactured composition is substantially composed of microcrystallites collectively of the formula: ##EQU1## where M.sup.2+ is a divalent metal, M.sup.3+ is a trivalent metal, and T is vanadium, tungsten, or molybdenum. The microcrystallites are so small as to be undetectable through conventional x-ray diffraction techniques, yet high resolution electron microscopy reveals that a substantial portion of the microcrystallites are composed of a solid solution having aluminum oxide molecularly dispersed in a divalent metal monoxide crystal structure. Another portion of the microcrystallites are constituted by a spinel phase. The collapsed composition is suitable as a sulfur oxide absorbent, having comparatively high capacity and comparatively fast absorption and desorption rates, and is also suitable as a nitrogen oxide reduction catalyst. The collapsed composition may be produced by heat treating a layered mixed hydroxide clay having interlayer anions in monometalate form. The reagents for the manufacturing process are relatively salt-free, as compared to reagents utilized in previous manufacturing processes.
摘要:
A method and nickel-containing catalyst are disclosed for preparing synthesis gas by the reforming of a hydrocarbyl compound using an oxygen-containing compound.
摘要:
A collapsed composition is described which is substantially composed of microcrystallites collectively of the formula:M.sub.2m.sup.2+ Al.sub.2-p M.sub.p.sup.3+ T.sub.r O.sub.7+r.swhere M.sup.2+ is a divalent metal, M.sup.3+ is a trivalent metal, and T is vanadium, tungsten, or molybdenum.The microcrystallites are so small as to be undetectable through conventional x-ray diffraction techniques, yet high resolution electron microscopy reveals that a substantial portion of the microcrystallites are composed of a solid solution having aluminum oxide molecularly dispersed in a divalent metal monoxide crystal structure. Another portion of the microcrystallites are constituted by a spinel phase. The collapsed composition is suitable as a sulfur oxide absorbent, having comparatively high capacity and comparatively fast absorption and desorption rates. The collapsed composition may be produced by heat treating a layered mixed hydroxide clay having interlayer anions in monometalate form.A sulfur oxide separation process is also presented. The process can be operated cyclicly and integrated with any of several well-known fluidized bed catalytic cracking processes.