It has been discovered that the temperature at which the instant hydrodealkylation reaction can be carried out is significantly less than the temperatures heretofore employed in conventional industrial hydrodealkylation processes.

[5] Ethylbenzene exposure can be determined by testing for the breakdown products in urine.

In surface water, it breaks down when it reacts with chemicals naturally found in water. Cl. All Rights Reserved. The reactor was 1.25 inches I.D. Hydrodealkylation reactions are generally well known as evidenced by the numerous patents and other publications in this field. The reactor effluent in each case was first condensed in the water condenser where unreacted toluene, water, bibenzyl and stilbene were condensed and collected. The reactions were conducted at atmospheric pressure in all three examples and at 580 C., 618 C., and 620 C., in Examples 1, 2, and 3, respectively. Saving Lives, Protecting People, The National Institute for Occupational Safety and Health (NIOSH), National Institute for Occupational Safety and Health, A – NIOSH Potential Occupational Carcinogens, B – Thirteen OSHA-Regulated Carcinogens, D – Substances with No Established RELs, E – OSHA Respirator Requirements for Selected Chemicals, G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect, Type C & CE – Definitions for Type C and Type CE Respirators, U.S. Department of Health & Human Services. The exact form and configuration and the particle size of these supports are not per se critical as far as this invention is con cerned. The reactor was packed with a bottom layer of Filtros, several inches of bismuth oxide (Bi O supported on Filtros and finally a top layer of several inches of Filtros terminating adjacently below the side tube. No. 33 C ( March 1993 ) 517088. to Institut Francis du Petrole), “Synthesis of Alkylbenzene(s). Little or no ethylbenzene is produced during this reaction. Click here to update settings. The experimental conditions as well as the results obtained in these examples are shown in Table I below.

43 Water feed rate, moles/hr 0. 33C (March, By clicking accept or continuing to use the site, you agree to the terms outlined in our. ethylbenzene and benzene are produced from toluene by a unique process which comprises first coupling the toluene in the presence of a catalyst and in the vapor phase to produce bibenzyl and stilbene.

Filed Dec. 27, 1968, Ser. The first principal reaction step in the process of this invention may be conveniently carried out in a single reactor as well as multiple reactors using fixed-bed or even a fluid-bed system if desired. View highlighted news, events, technical papers and case studies below. X, Inter-Science Publishers, 1965, p. 219. To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Related Pages.

Therefore, a continuous and large supply of ethylbenzene is necessary to insure an adequate supply of styrene.

Semantic Scholar is a free, AI-powered research tool for scientific literature, based at the Allen Institute for AI. It is a highly flammable, colorless liquid with an odor similar to that of gasoline.

As nouns the difference between benzene and ethylbenzene is that benzene is benzene (aromatic compound) while ethylbenzene is (organic compound) the hydrocarbon c 6 h 5-ch 2 ch 3 that is used in the production of styrene. selective catalysts, Stilbene formation by means of toluene dehydrocoupling using a cobalt-lanthanide catalyst, Oxidative conversion of organic compounds, toluene and acetonitrile, Oxidative methylation of organic compounds, Oxidative conversion of organic compounds, Composition of matter and method of oxidative conversion of organic compounds therewith, Reactors and Processes for the Oxidative Coupling of Hydrocarbons, Process for recovery of light alkyl mono-aromatic compounds from heavy alkyl aromatic and alkyl-bridged non-condensed alkyl aromatic compounds, Methods and systems of upgrading heavy aromatics stream to petrochemical feedstock, Method and system for drying solid material, method and equipment for directly drying based on vapor mechanical recompression, Reactors and processes for the oxidative coupling of hydrocarbons, Systems and processes for recovery of light alkyl mono-aromatic compounds from heavy alkyl aromatic and alkyl-bridged non-condensed alkyl aromatic compounds, Method for providing a co-feed in the coupling of toluene with a carbon source, Process for the manufacture of acrylonitrile, Production of unsaturated carbonylic compounds, Process for alkylating aromatic compounds, Selective production and reaction of p-Disubstituted aromatics over zeolite ZSM-48, Integrated process for producing an alkenyl-substituted aromatic compound, Vapor phase alkylation in presence of crystalline aluminosilicate catalyst, Conversions of low molecular weight hydrocarbons to higher molecular weight hydrocarbons using a metal-containing catalyst, Preparation of olefins from methanol and/or dimethyl ether, Catalyst for the conversion of low carbon number aliphatic hydrocarbons to higher carbon number hydrocarbons, process for preparing the catalyst and process using the catalyst, Methanol conversion to hydrocarbons with zeolites and cocatalysts, Transalkylation process with recycle of C10 hydrocarbons, Arene alkylation with metal oxide-tantalum halide/oxide catalysts, Catalytic hydrocarbon condensation process, Conversion of alkanes to unsaturated aldehydes, Production of maleic and alkyl substituted maleic anhydrides by catalytic oxidation, Catalytic dehydrogenation of hydrocarbons, Dehydrogenation in the presence of oxygen and an ammonium halide, Disproportionation of alkyl aromatics with decationized mordenite containing a sulfided metal, Selective disproportionation method of toluene, disproportionation of toluene with C9, C9 + aromatic hydrocarbon, and alkyl exchange reaction method. An alkylation reactor uses ExxonMobil catalyst to convert benzene and ethylene to ethylbenzene (EB) in the liquid phase. The process of claim 1 wherein the weight ratio of benzene to stilbene and bibenzyl is from about 1:1 to about 5: 1. EXAMPLE 4 The experimental procedure and apparatus employed in this example were the same as in the previous examples.

Ethylene reacts with ethylbenzene to form undesired product di-ethyl benzene, if the temperatures of reactor or concentrations of ethylene are high. However, this hydrodealkylation reaction is accompanied by loss of the methyl group'to methane which is a low value by-product. CDC twenty four seven.

00 Air feed rate, moles/hr 0.

The dominant application of ethylbenzene is role as an intermediate in the production of polystyrene. 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. [4] Once inside the body, ethylbenzene biodegrades to 1-phenylethanol, acetophenone, phenylglyoxylic acid, mandelic acid, benzoic acid and hippuric acid. Thus, in stoichiometric operation the temperature can vary from about 200 C. to about 400 C. or even higher.

The process to produce ethylbenzene is currently asked for by the UK A level Exam Board AQA, and I am including it solely to satisfy their requirements. 43 0.



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