Ethyl benzene/styrene

Efficiency and pressure drop data for Siilzer BX metal gauze structured packing and for three test mixtures are shown in Fig. 14-7.5. For the ethyl benzene/styrene test mixture, the effect of operating pressure is shown. The high viscosity mixture, propylene glycoL/ethylene... 

Styrene was obtained by catalytic dehydrogenation of ethyl benzene. Styrene gets readily polymerised... 

Reactions Ethyl- benzene Styrene Phenyl- acetylene... 

Solution Table 14-12 presents measurements by Billet (loc. cit.) for ethyl-benzene-styrene under similar pressure with sieve and valve trays. The column diameter and tray spacing in Billets tests were close to those in Example 9. Since both have single-pass trays, the flow path lengths are similar. The fractional hole area (14 percent in Example 9) is close to that in Table 14-12 (12.3 percent for the tested sieve trays, 14 to 15 percent for standard valve trays). So the values in Table 14-12 should be directly applicable, that is, 70 to 85 percent. So a conservative estimate would be 70 percent. The actual efficiency should be about 5 to 10 percent higher. 

Methanol-water Ethyl benzene-styrene Cycloheaane -fi-heptane... 

Some compounds have low enough volatility and are soluble enough to be collected by absorption in a solvent. Vinyl acetate has been collected in toluene and isooctane can be used for the collection of aromatics such as ethyl benzene, styrene and pesticides. Ethylene glycol has also been used to collect pesticides. A colorimetric method was developed by Palassis for tetramethyl and ethylene thiourea. Samples were collected in impingers containing water and derivatized with penta-cyanoamineferrate to form a colored coordination complex. 

Column diameter 800 mm, tray spacing 500 mm System Ethyl benzene/styrene Reflux ratio oo, operating pressure 133 mbar Ap Pressure drop of a single tray Ap Pressure drop of a theoretical stage F Vapor load Tray efficiency... 

Values are obtained with the system ethyl benzene — styrene at 133.3 mbar, at 80% of the flooding point, and a reflux ratio (v = oo). Tray spacing Az = 0.5 m. 

Herman, C., Quicker, P., Dittmeyer, D. (1997). Mathematical simulation of catalytic dehydrogenation of ethyl benzene styrene in a composite palladium membrane reactor. Journal of Membrane Science, 136, 161—172. 

In the St. Clair River Area of Concern, Dow Chemical Canada, Inc. of Sarnia, Ontario has expanded the process water collection system at its EB/Styrene plant to maximize the recovery of organic compounds. The EB/Styrene plant uses ethyl benzene, styrene, benzene, and toluene in the production of more complex organic compounds. During the manufacturing process, these four compounds end up in the wastewater. The wastewater collection system has been expanded recently to recover all process wastewater and divert it to the purification tower where these four contaminants are steam stripped out and then reused as part of the fuel stream to produce steam and electricity (P. Murphy, pers. comm., Dow Chem. Can. Inc., Sarnia, Ontario, 1989). This project was implemented in 1986 at a cost of 270,000. The tower removes approximately 250 kg/d of contaminants (Mackinnon 1989) which are then added to other fuel streams providing a savings in displaced fuel cost of approximately 20,000 per year (P. Murphy, pers. comm., Dow Chem. Can. Inc., Sarnia, Ontario, 1989). 

Ethyl benzene Styrene - - H2 The reaction velocity is given by the expression... 

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