Rectification multi stage

Styrene is one of the most important monomers produced by the chemical industry today. It is separated from the products of dehydrogenation of ethylbenzene by a multi-stage rectification. The process inhibitors for styrene are mainly nitroaromatic compounds or aromatic amines and phenolic compounds such as p-tertbutylcatechol or 2,6 ditertbutylhydroxytoluene mixed with other radical acceptor inhibitor. 

Valve-Less Rectification Pumps, Fig. 16 Tesla diode, the earliest no-moving-part device designed to exhibit a large difference between the properties in forward and return flow direction. While the forward flow left, top) is almost straight, the reverse flow right, bottom) enters the complex curved flowpath. Diodity, even in the typical multi-stage layout, is not high, much worse than obtainable with vortex-type fluidic diodes... 

Valve-Less Rectification Pumps, Fig. 29 The principle of a traveling-wave peristaltic multi-stage pump driven by a two-phase air flow. A considerable proportion... 

The concept of using heat exchangers for both heat and mass transfer in multi-stage rectification has been around for over 50 years, but more recently companies such... 

Valve-Less Rectification Pumps, Figure 7 The Tesla diode, one of the earliest no-moving-part devices. As shown here, it is usually used in a multi-stage layout. Diodity is very much worse than with vortex diodes... 

Valve-Less Rectification Pumps, Figure 9 Planar labyrinth diode, more suitable for micromanufacturing again a multi-stage version... 

To round off the list, the peristaltic pumps should be mentioned. They use a multi-phase multi-stage arrangement similar to that of Fig. 20, but in their common form they are based on much less effective rectification elements. Rnally, a useful rectification has been also demonstrated based on temperature dependence of viscosity. Ohmic... 

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