摘要:
The present invention provides, among other things, new processes for separating and purifying C4 fractions from a crude C4 stream. Compared to prior methods, the processes of the present invention simplify the C4 separation processes, afford more possible configurations for separation and purification, and are more cost effective. The processes and systems provided herein can be used as part of a cost-effective and efficient method for synthesizing methyl tertiary-butyl ether.
摘要:
A propane production method includes a hydrogenation reaction step of hydrogenation-reacting crude propylene and hydrogen in a presence of a catalyst to obtain gaseous crude propane containing impurities; and an impurity removal step of removing the impurities contained in the gaseous crude propane obtained in the hydrogenation reaction step to obtain purified propane. The impurity removal step includes an adsorptive removal stage of adsorbing and removing water, ethane and propylene contained as impurities in the gaseous crude propane by adsorption treatment in which the gaseous crude propane is brought into contact with an adsorbent, and a separation removal stage of separating and removing hydrogen, oxygen, nitrogen and methane contained as impurities in the crude propane after the adsorption treatment by partial condensation or distillation of crude propane after the adsorption treatment in the adsorptive removal stage.
摘要:
Methods and apparatuses are provided for producing hydrocarbons. A method for producing hydrocarbons may include two or more reactors having a distributed aromatic rich feed and hydrogen system. Using this configuration, the aromatic rich feed and hydrogen streams are split equally to all reactors wherein each reactor contains a catalyst. The outlet from the last reactor may include a recycle that may be injected into the inlet of the first reactor.
摘要:
A process for the conversion of linear pentenes to propylene is disclosed. The process may include feeding hydrogen and a C5-olefin containing stream comprising linear pentenes, dienes, acetylenes, and cyclopentene to a catalytic distillation reactor system. Concurrently in the catalytic distillation reactor system, the acetylenes and dienes may be hydrogenated and the C5-olefin containing stream may be fractionated, thereby recovering an overheads fraction comprising the linear pentenes, a side draw fraction comprising the cyclopentene, and a bottoms fraction. In some embodiments, at least a portion of the overheads fraction may then be fed to a metathesis reactor for converting the linear pentenes to propylene.
摘要:
A system for producing high-purity phenol and/or cyclohexanone from cyclohexylbenzene oxidation includes a cyclohexylbenzene feed hydrogenation reactor, a bubble column oxidation reactor, a cyclohexylbenzene hydroperoxide concentrator, a cleavage reactor, and a separation and purification sub-system. The components and the integrated system are designed such that high-purity phenol and/or cyclohexanone can be produced at high energy efficiency.
摘要:
A system for producing high-purity phenol and/or cyclohexanone from cyclohexylbenzene oxidation includes a cyclohexylbenzene feed hydrogenation reactor, a bubble column oxidation reactor, a cyclohexylbenzene hydroperoxide concentrator, a cleavage reactor, and a separation and purification sub-system. The components and the integrated system are designed such that high-purity phenol and/or cyclohexanone can be produced at high energy efficiency.
摘要:
The present invention relates to hydrogenation processes including: contacting a first composition with hydrogen under hydrogenation conditions, in the presence of an eggshell hydrogenation catalyst, wherein the first composition has: (i) greater than about 50 wt % of cyclohexylbenzene, the wt % based upon the total weight of the first composition; and (ii) greater than about 0.3 wt % of cyclohexenylbenzene, the wt % based upon the total weight of the first composition; and thereby obtaining a second composition having less cyclohexenylbenzene than the first composition. Other hydrogenation processes are also described.
摘要:
A linear alkyl benzene product and production of linear alkylbenzene from a natural oil are provided. A method comprises the step of deoxygenating the natural oils to form a stream comprising paraffins. The paraffins are dehydrogenated to provide mono-olefins. Then, benzene is alkylated with the mono-olefins under alkylation conditions to provide an alkylation effluent comprising alkylbenzenes and benzene. Thereafter, the alkylbenzenes are isolated to provide the alkylbenzene product.
摘要:
A linear alkyl benzene product and production of linear alkylbenzene from a natural oil are provided. A method comprises the step of deoxygenating the natural oils to form a stream comprising paraffins. The paraffins are dehydrogenated to provide mono-olefins. Then, benzene is alkylated with the mono-olefins under alkylation conditions to provide an alkylation effluent comprising alkylbenzenes and benzene. Thereafter, the alkylbenzenes are isolated to provide the alkylbenzene product.
摘要:
Various substantially styrene-, methylstyrene- and ethylbenzene-free C6-C9 aromatic hydrocarbon blends are produced from a hydrocarbon feed stream containing C5-C9 aromatic hydrocarbons including styrene, methylstyrene and sulphur compounds by first separating the stream into a distillate containing C5-C7 hydrocarbons, and a bottoms fraction containing C8 and C9 hydrocarbons; and converting the styrene and methylstyrene to their corresponding ethers by reacting with a C1-C3 lower alcohol in the presence of a selective acidic etherification catalyst. The effluent may be sent to a gasoline pool for blending or the effluent is separated by distillation into an ether stream and either a C8 or a C8-C9 aromatic hydrocarbon rich stream. The C5-C7 distillate is hydrogenated.