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2104 results about "Ethylbenzene" patented technology

Ethylbenzene is an organic compound with the formula C₆H₅CH₂CH₃. It is a highly flammable, colorless liquid with an odor similar to that of gasoline. This monocyclic aromatic hydrocarbon is important in the petrochemical industry as an intermediate in the production of styrene, the precursor to polystyrene, a common plastic material. In 2012, more than 99% of ethylbenzene produced was consumed in the production of styrene.

Selective xylenes isomerization and ethylbenzene conversion

This invention is drawn to a process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene using an oil-dropped catalyst comprising a zeolite, a platinum-group metal and an aluminophosphate binder, resulting in a greater yield of para-xylene at favorable conditions compared to processes of the known art.
Owner:UOP LLC

Olefin upgrading process with guard bed regeneration

InactiveUS20080029437A1Continuity of operation is assuredCatalytic crackingMolecular sieve catalystsPetrochemicalAlkylation
A process for the regeneration of materials used in the guard beds preceding the reactors used in an olefin conversion process which converts olefinic refinery streams to higher boiling hydrocarbon products by polymerization (oligomerization) or alkylation of aromatics including benzene. Products of the process may include olefin oligomers and alkylaromatics in the gasoline boiling range as well as alkylaromatic petrochemicals such as cumene and ethylbenzene. The process is integrated with the olefin conversion process to ensure continuous operation of the olefin conversion without sending the feedstock containing the contaminant(s) to the reactor. The process uses reaction products from the olefin conversion process to regenerate the guard bed material and so is economically attractive since it does not require the use of separate purge, regeneration feed and separation systems. A plurality of guard beds is used, each containing a material which removes catalyst poisons. The guard beds are operated on a swing system in which one or more beds is kept on stream to remove the contaminant(s) while one or more of the remaining beds is being purged or regenerated. In this way, continuity of operation is assured. The regeneration medium is a product stream from the olefin conversion process.
Owner:EXXON RES & ENG CO

Method for preparing ethylbenzene by reaction of dilute ethylene and benzene

The invention discloses a method for preparing ethylbenzene by reaction of dilute ethylene and benzene, which uses the dilute ethylene in dry gas of oil refinery as raw material, water washing and selective removal of propylene are conducted for the dry gas before the dry gas enters an alkylation reactor in sections, alkylation reaction of the dilute ethylene in dry gas and the benzene proceeds under the circumstances that zeolite catalyst exists, the dry gas and / or low-temperature gas-phase benzene are utilized for taking heat during the alkylation reaction, and the reaction temperature rising is reduced; after the vapor-liquid separation of the alkylation reaction product, tail gas is discharged from the device through low-temperature absorption, and cycle benzene, ethylbenzene, propyl benzene, diethylbenzene and heavy component are sequentially separated from the liquid product through a separation system; the diethylbenzene and the benzene are mixed and enter an anti-alkylation reactor and anti-alkylation reaction proceeds on molecular sieve catalyst for further converting to the ethylbenzene. The invention effectively reduces the benzene consumption and the energy consumption during the course of preparing ethylbenzene by dilute ethylene, the ethylene conversion rate is more than or equal to 99%, the total selectivity of generating ethylbenzene is more than or equal to 99%, the recovery rate of benzene carried by the tail gas is more than or equal to 99.5%, and the xylene content in the ethylbenzene is less than 800 ppm.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Process flow for raw material pretreatment portion of catalytic dry gas produced phenylethane

The invention discloses a predisposing technological flow path of ethylbenzene through catalyzing dried gas, which comprises the following steps: adsorbing propylene; desorbing ethylene; desorbing propylene; adding raw material to strip propylene; washing most of MEDA; entering standard dried gas in the delivery tank; entering into propylene adsorbing tower; draining purified dried gas from top of propylene adsorbing tower; making one path as cool material in the ethylene stripping tower and one path to exchange heat with base material of propylene stripping tower under 10-300 deg.c in the ethylene stripping tower; desorbing ethylene component; draining ethylene gas; returning in the dried gas delivery tank; circulating between ethylene stripping tower and propylene stripping tower; desorbing propylene component from adsorbant with 150ppm-0.7% dried propylene in the stripped propylene.
Owner:中国寰球工程有限公司辽宁分公司

Catalyst for preparing phenylethane from dilute ethylene and benzene alkylation and method for preparing same

The invention aims to provide a catalyst for preparing phenylethane from dilute ethylene and benzene alkylation and a method for preparing the same. The catalyst is characterized in that the crystal is formed by a small crystal grain ZSM-5 molecular screen with the crystal grain size of between 0.15 and 0.8 mircometer and a bonding agent of aluminum oxide and silicon dioxide, and then prepared by steps of vapor / ammonia vapor treatment and acid treatment, wherein the relative mass ratio of the ZSM-5 molecular screen to the bonding agent of the aluminum oxide and the silicon dioxide is (5-9):(1-5). When the catalyst is used for preparing the phenylethane from the dilute ethylene and the benzene alkylation in dry gas, because the crystal grain size of the used molecular screen is small, the number of acidic sites and the acidic utilization ratio of the catalyst are high, and simultaneously the pore canal of the molecular screen is short, which is favorable for dispersion of reactants and products, so that the catalyst has the characteristics of high activity, low reaction temperature, high selectivity of target products, low content of xylene impurity in the product and good satiability.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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