1.3- diethyl benzene

The selectivity is 100% in this simple example, but do not believe it. Many things happen at 625°C, and the actual effluent contains substantial amounts of carbon dioxide, benzene, toluene, methane, and ethylene in addition to styrene, ethylbenzene, and hydrogen. It contains small but troublesome amounts of diethyl benzene, divinyl benzene, and phenyl acetylene. The actual selectivity is about 90%. A good kinetic model would account for aU the important by-products and would even reflect the age of the catalyst. A good reactor model would, at a minimum, include the temperature change due to reaction. 

Dermal Effects. Skin irritation was noted in wildlife officers at the RMA after they handled sick or dead ducks without gloves (NIOSH 1981). Although the investigators concluded that diisopropyl methylphosphonate contributed to the local effects, a number of other compounds were present. Analysis of the pond water indicated the presence of a number of organic and inorganic contaminants, including diisopropyl methylphosphonate (11.3 ppm) aldrin (0.368 ppm) dieldrin (0.0744 ppm) dicyclo-pentadiene, bicycloheptadiene, diethyl benzene, dimethyl disulfide, methyl acetate, methyl isobutyl ketone, toluene, and sodium (49,500 ppm) chloride (52,000 ppm) arsenic (1,470 ppm) potassium (180 ppm) fluoride (63 ppm) copper (2.4 ppm) and chromium (0.27 ppm). Because of the presence of numerous compounds, it is unclear whether diisopropyl methylphosphonate was related to the irritation. 

No studies were located regarding interactions with other substances in humans or animals after exposure to diisopropyl methylphosphonate. However, the potential for multiple chemical interactions does exist. Diisopropyl methylphosphonate has been identified in the RMA in the presence of many other chemicals (such as endrin, dieldrin, dicyclopentadiene, bicycloheptdiene, diethyl benzene, and diethyl disulfide). The nervous system is a target of many of these compounds found at the RMA, including diisopropyl methylphosphonate. Therefore, there is potential for interaction, and studies examining multiple exposures would be useful in predicting risk to humans. Workers at the RMA reported skin irritation after dermal exposure to diisopropyl methylphosphonate at concentrations around 11.3 ppm in water. However, several other chemicals were also in the area (NIOSH 1981). Therefore, it is not clear if diisopropyl methylphosphonate contributed to the effects. 

Trichlorophenoxyacetic, 2,4,5 Acid Dioxin and Related Compounds Dioxin and Related Compounds HxCDF Hexachlorodibenzofurans TCDD Tetrachlorodibenzodioxins TCDF Tetrachlorodibenzofurans Disubstituted and Polysubstituted Benzene Hydrocarbons Diethyl Benzene... 

Diethyl Benzene under Disubstituted and Polysubstituted Benzene Hydrocarbons Diethyl Ether under Noncyclic Aliphatic or Aromatic Ethers Dihalogenated and Polyhalogenated Ethers... 

Chitani, T., Y. Horibe and M. Kobayakawa Radical polymerization of styrene in heavy p-diethyl benzene. Kobushi Kagaku 15, 438 (1958). 

The predominance of meta-diethyl benzene in the isomerization of diethylbenzenes is easily rationalized. Since isomerization reaction proceeds via arenium ion intermediates, the cr-complex derived from mefa-diethylbenzene is the most stable one. Moreover, mefa-diethylbenzene is also the most basic of the isomeric diethylben-zenes. Therefore, more acidic catalysts increase the amount of the meta isomer at the expense of the para (and ortho) isomers, due to the increased stability of the substrate-catalyst complex. 

C6H4Br2 + 2C,HSI + 4Na = C6H4(C,H5)2 + 2NaI + 2NaBr Dibrom-benzeno. Ethyl iodide. Diethyl-benzene. 

The specific chemistry used to illustrate the use of Aspen Plus is the reaction of ethylene (E) with benzene (B) to form the desired product ethylbenzene (EB). There is a consecutive reaction that produces an undesirable product diethylbenzene (DEB). A third reaction combines benzene and diethyl benzene to form ethylbenzene ... 

Polystyrene Polyvinyl bulyral Nylon 1.05-1.08 Orange yellow 1.07-1.08 Blue mantle yellow 1.09-1.14 Bluemanlle yellow Yes Yes (trans.) Yes Black Dense Sweet marigolds Rancid butter Burn hair Diethyl benzene... 

Synonym. Ethyl Phthalate Diethyl benzene-1,2-dicarboxylate... 

This results in a reaction product containing a mixture of mono, di, tri, and higher ethylbenzenes together with unreacted benzene. The ratio of ethylene to benzene in the reactor feed can, of course, be chosen to maximize the formation of monoethylbenzene but the other products cannot be eliminated. Fortunately, the reaction is reversible, e.g., diethyl benzene will react with benzene under the Influence of AICI3 to form monoethylbenzene. 

Monsanto s reactor layout, in simplified form, is shown in Figure 2. Dry benzene, ethylene, catalyst, and promoter are fed continuously to the reactor. The alkylator effluent is mixed with polyethylbenzenes, mainly diethyl benzene recycled from the subsequent recovery system. The transalkylator allows enough residence time for the product to approach equilibrium. The aluminum... 

The washed alkylate is fed to a series of three distillation columns where benzene, ethylbenzene, and diethyl benzene-triethyl -benzene mixtures are removed as overhead products. The benzene is recycled to the benzene drying column before feeding again to the alkylator. The diethyl benzene mixture is recycled to the transalkylator. The bottoms from the last column is what we call "flux oil." This consists mainly of diphenylethanes. The amount of this material is good measure of the overall process yield. 

NJS -DIETHYLBENZENAMINE see DIS700 DIETHYL BENZENE see DIUOOO m-DIETHYLBENZENE see DIU200 DIETHYLBENZENE (DOT) see DIUOOO DIETHYLBENZOL see DIUOOO DIETHYLBERYLLIUM see DIVOOO DIETHYLBIS(OCTANOYLOXY)STANNANE see DIV600... 

C10H14 m-diethyl benzene 141-93-5 454.29 40.333 1,2 20001 C10H14O 4-methyl-3-propyl phenol — 547.87 51.577 2... 

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