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Distillation HIGEE

The amount of hazardous chemicals on-site can be reduced by methods other than altering the scale of production. For example, the amount of hazardous material stored on-site can often be significantly reduced, and if not, the hazardous materials can be stored in many small containers in separate facilities rather than in a single container. Therefore, if a container fails, the size and catastrophic potential of the release are much reduced. In addition, the amount of material needed in the production process can be reduced by using specially designed equipment (such as Higee columns, which replace conventional distillation columns). [Pg.486]

Figure 13.14. A centrifugal packed fractionator, trade name HIGEE, Imperial Chemical Industries. Units have been operated with 500 times gravitational acceleration, with 3-18 theoretical stages, up to 36 in. dia, employing perforated metal packing. For distillation, one unit is needed for rectification and one for stripping. Units have been used primarily for gas stripping and on offshore platforms because of compactness [Ramshaw, Chem. Eng., 13-14 (Feb. 1983)]. Figure 13.14. A centrifugal packed fractionator, trade name HIGEE, Imperial Chemical Industries. Units have been operated with 500 times gravitational acceleration, with 3-18 theoretical stages, up to 36 in. dia, employing perforated metal packing. For distillation, one unit is needed for rectification and one for stripping. Units have been used primarily for gas stripping and on offshore platforms because of compactness [Ramshaw, Chem. Eng., 13-14 (Feb. 1983)].
Ramshaw C. Higee distillation—an example of process intensification. Chem Eng 1983 389 13-14. [Pg.79]

Hickman still, molecular distillation, 427 HIGEE fractionator, 399 Homogeneous gas reactions, 592 HTU (height of a transfer unit), 401,404, 422... [Pg.751]

Phases gas-liquid, gas-liquid catalytic solid, gas-liquid plus catalytic solid minimizes catalyst poisoning, lower pressure than fixed bed. Used for hydrogenation reactions and MTBE and acrylamide production. For example, 90% conversion via reactive distillation contrasted with 70% conversion in fixed-bed option. Liquid with homogeneous catalyst etherification, esterification. Liquid-liquid HIGEE for fast, very fast, and highly exothermic liquid-liquid reactions such as nitrations, sulfonations, and polymerizations. Equilibrium conversion <90%. Use a separate prereactor when the reaction rate at 80% conversion is >0.5 initial rate. The products should boil in a convenient temperature range. The pressure and temperature for distillation and reaction should be compatible. [Pg.1425]

ICI has proposed their Higee Distillation System which is said to substitute a distillation column at lower capital cost. No commercial apllication has been reported so far [4.1]. [Pg.144]

For HIGEE, residence time 0.1-1 s voidage 90-95% 2 m diameter max., area per volume 2000-5000 m /m. 1000 rpm film thickness 100 pm. Overall heat transfer coeffident 1/ = 10 kW/m K. See also Reactive distillation. Section 6.35. [Pg.98]

Prefer the use of low holdup internals or HIGEE (H). Prefer a distillation sequence to minimize inventory of hazardous material (H). Select materials of construction to promote wetting select critical surface tension of the solid to be > the surface tension of the liquid. If the surface tension of the distillate > surface tension of the bottoms (surface tension negative) prefer the use of trays to packings to minimize potential for liquid film breakup. If the surface tension of the distillate < surface tension of the bottoms (surface tension positive), the foam above trays might be unexpectedly stable. [Pg.98]

Reactive distillation/ extraction/ crystallization, HIGEE Reaction window = distillation windovs reaction equilibrium can be shifted by removing one or more of the species from the reaction space. [Pg.215]

Ramshaw, C. (1983). Higee distillation-an example of process intensification. Chemical Engineering, 389, 13-14. [Pg.8]

Ramshaw, C., Higee Distillation— An Exanple of Process Intensification, Chem. Engr., (389), 13 (1983). [Pg.424]


See other pages where Distillation HIGEE is mentioned: [Pg.300]    [Pg.17]    [Pg.32]    [Pg.495]    [Pg.480]    [Pg.94]    [Pg.1255]    [Pg.216]    [Pg.230]    [Pg.231]    [Pg.1369]    [Pg.133]    [Pg.133]    [Pg.134]    [Pg.137]    [Pg.137]    [Pg.137]    [Pg.138]    [Pg.154]    [Pg.159]    [Pg.160]    [Pg.161]    [Pg.163]    [Pg.163]    [Pg.480]    [Pg.94]    [Pg.417]    [Pg.46]    [Pg.10]    [Pg.23]   
See also in sourсe #XX -- [ Pg.94 , Pg.277 ]




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