摘要:
A process for alkylation of propylene, the process including: contacting a stream comprising propylene and propane with sulfuric acid in a first reaction zone under conditions to form propylene sulfate esters; contacting the propylene sulfate esters with isoparaffin and sulfuric acid in an alkylation reaction zone under conditions to react the propylene sulfate esters and the isoparaffin to form a reactor effluent comprising an acid phase and a hydrocarbon phase comprising unreacted isoparaffin and alkylate product; separating the hydrocarbon phase from the sulfuric acid; separating the hydrocarbon phase to form a fraction comprising unreacted isoparaffin and a fraction comprising the alkylate product.
摘要:
A process for the conversion of tertiary butyl alcohol to ethyl tertiary butyl ether, including: dehydrating tertiary butyl alcohol to form a product stream comprising isobutylene and water; separating the product stream to form an isobutylene-rich fraction and a water-rich fraction; separating the water-rich fraction to recover a hydrocarbon fraction and a water fraction having less than 1 ppm hydrocarbon content; reacting isobutylene in the isobutylene-rich fraction with ethanol to form a reaction product comprising ethyl tertiary butyl ether; separating the reaction product to recover unreacted ethanol and an ethyl tertiary butyl ether stream; and recycling at least a portion of the unreacted ethanol to the reacting; wherein the ethyl tertiary butyl ether stream comprises at least 99 weight percent ethyl tertiary butyl ether.
摘要:
A process for treating an alkylation feedstock comprising olefins, n-alkanes, iso-alkanes, and impurities including one or more of butadiene, oxygenates, nitrogen-containing compounds, and sulfur-containing compounds, the process including: contacting an alkylation feedstock containing at least one of oxygenates and nitrogen-containing compounds with water to produce a hydrocarbon fraction having a reduced concentration of the at least one of oxygenates and nitrogen-containing compounds and an aqueous fraction comprising at least a portion of the at least one of oxygenates and nitrogen-containing compounds; separating water from the hydrocarbon fraction having a reduced concentration to produce a hydrocarbon fraction having a reduced water content; contacting the hydrocarbon fraction having a reduced water content with an oligomerization catalyst in a first oligomerization reaction zone under oligomerization conditions to react at least a portion of the olefins to form a reactor effluent comprising olefin oligomers; and feeding at least a portion of the reactor effluent to an alkylation unit.
摘要:
A process for reducing the sulfur content of a gasoline fraction comprising one or more organic sulfur compounds including mercaptans, thiophenes, and mono- and di-sulfides, the process including: contacting a gasoline fraction having an initial organic sulfur content with a sulfuric acid-rich composition to extract organic sulfur compounds from the gasoline fraction and produce a gasoline fraction having reduced sulfur content and a sulfuric acid fraction having increased organic sulfur content; and separating the gasoline fraction having reduced organic sulfur content and the sulfuric acid-rich fraction having increased organic sulfur content.
摘要:
A process for the alkylation of isobutane is disclosed wherein isobutane is fed to two separate alkylation systems. The effluent from the first alkylation system is fed to an interim debutanizer where the C4's are separated from the alkylate product. The overhead C4 product is then fed to the second alkylation system to provide the isobutane. The effluent from the second alkylation system is fed to a traditional deisobutanizer to prevent any build up of normal butanes in the system.
摘要:
A process for the dimerization of isoolefins, including: contacting an isoolefin with a solid catalyst composition passivated with at least one of an ether, an alcohol, and water; wherein the solid catalyst composition comprises at least one of a solid phosphoric acid catalyst and a resin of a macroporous matrix of polyvinyl aromatic compound crosslinked with a divinyl compound and having thereon from about 3 to 5 milli equivalents of sulfonic acid groups per gram of dry resin; and wherein at least 50% to less than 100% of acid groups in the solid catalyst composition are neutralized with a metal of Al, Fe, Zn, Cu, Ni, or mixtures thereof. The catalyst may be metalized prior to placement in a reactor or may be metalized in situ.
摘要:
A process for treating an alkylation feedstock comprising olefins, n-alkanes, and iso-alkanes, the process including: contacting at least a portion of the alkylation feedstock with sulfuric acid in a reaction zone under conditions to form sulfate esters of the olefins; separating the n-alkanes and the iso-alkanes from the sulfuric acid and the sulfate esters; recovering the n-alkanes and the iso-alkanes in a first product stream; and recovering the sulfate esters in a second product stream; wherein the sulfuric acid has a strength titrating as below 75 weight percent H2SO4/water mixtures.
摘要翻译:一种用于处理包含烯烃,正烷烃和异烷烃的烷基化原料的方法,该方法包括:在形成烯烃的硫酸酯的条件下,使反应区中至少一部分烷基化原料与硫酸接触; 从硫酸和硫酸酯分离正烷烃和异烷烃; 在第一产物流中回收正烷烃和异烷烃; 并在第二产物流中回收硫酸酯; 其中硫酸的浓度滴定低于75重量%的H 2 SO 4 /水混合物。
摘要:
A process for producing an alkylate having a low Reid vapor pressure, the process including: contacting a C6+-containing hydrocarbon stream with a mixture of isopentane and isobutane in the presence of an acid catalyst in an alkylation reactor to form a dilute alkylate product, wherein the C6+-containing hydrocarbon stream includes at least one of oligomers of C3 to C5 olefins and a dilute alkylate produced by contacting an isoparaffin with at least one of C3 to C5 olefins and oligomers of C3 to C5 olefins; fractionating the dilute alkylate product to form an isobutane-rich fraction, a n-butane-rich fraction, a fraction containing isopentane, and an alkylate product having a Reid vapor pressure less than 0.35 bar (5 psi); recycling at least a portion of the fraction containing isopentane to the alkylation reactor.
摘要:
A single stage process for treating pyrolysis gasoline containing acetylene, diolefins, sulfur compounds and nitrogen compounds to react a sufficient amount of said acetylene and diolefins with hydrogen to produce saturated products and hydrogen sulfide to provide a pyrolysis gasoline product suitably for use as gasoline blending stock comprising: feeding pyrolysis gasoline and hydrogen at a mol ratio of hydrogen to pyrolysis gasoline of at least 0.5:1 and preferably in the range of 1:1 to 3:1 to a hydrodesulfurization zone containing a hydrodesulfurization catalyst such as cobalt/molybdenum under vapor phase conditions at a pressure in the range of 200 to 500 psig at a temperature in the range of 550° F. to 850° F. The operating temperature is at least above the dew point of the mixture of pyrolysis gasoline and hydrogen, preferably in a range 50 to 400° F. above said dew point.
摘要:
A process for reducing the concentration of benzene in a hydrocarbon stream, the process including: fractionating a reformate to form a benzene concentrate fraction comprising benzene and other C6 hydrocarbons, and a heavies fraction comprising C7+ hydrocarbons; and hydrogenating the benzene concentrate fraction to form a hydrocarbon fraction having a reduced benzene concentration.