Problem feasible blend

Savings and Cost/Benefit Analysis. The bench scale experiments were successful Tn overcoming major technical problems while demonstrating that dyebath/auxiliary bath reuse is indeed feasible with reactive dyes on cotton-containing fabrics. In addition, a shortened-cycle dyeing procedure coupled with reuse for cotton/polyester blends was shown to further increase energy, mass, and time savings (Table XXX). 

The key words to the future of methanol/gasoline blends for automotive use are need and availability. Technically, the operation of methanol/gasoline blends in automotive engines is feasible with some associated problems. Economically, methanol is not yet competitive with gasoline produced from petroleum, hence the need has not been strongly established. Since the need or market is not established, the capital expenses involved in producing methanol from coal or garbage are not presently justified. However, if 40-60% of the crude oil used in the U.S. to produce petroleum products should suddenly become unavailable, the need would be very real. The necessity of compete evaluation of methanol and other alternate fuels is evident. 

The problem for a Safety-I perspective is that we live in a complicated, intricate world, where work takes place in conditions of multiple interacting technical, financial, cultural and political constraints. Doing things perfectly under such conditions is hardly a feasible option. But it is difficult for safety management to adopt a view that involves complicated trade-offs, since that does not blend well with the ideal of a well... 

We expect to see a longer blend time in the plant, so this is probably acceptable. Both Reynolds numbers are in the turbulent regime and the fluids are the same, so this looks like a feasible design. One remaining problem is that we have moved from an axial impeller to a radial impeller, so the circulation patterns will change dramatically. It will be much cheaper to test the effect of this change in a scaled-down geometry than on the full plant scale To complete the problem, we need... 

An alternative approach that combines the Gaussian thread model of polymers with liquid-state theory is known as the polymer reference interaction site model (PRISM) approach [34-38[. This approach has the merit that phenomena such as the de Gennes [3] correlation hole phenomena and its consequences are incorporated in the theoretical description, and also one can go beyond the Gaussian model for the description of intramolecular correlations of a polymer chain, adding chemical detail (at the price of a rather cumbersome numerical solution of the resulting integral equations) [37,38[. An extension to describe the structure of colloid-polymer mixtures has also become feasible [39, 40]. On the other hand, we note that this approach shares vhth other approaches based on liquid state theories the difficulty that the hierarchy of exact equations for correlation functions needs to be decoupled via the so-called closure approximation [34—38]. The appropriate choice of this closure approximation has been a formidable problem [34—36]. A further inevitable consequence of such descriptions is the problem that the critical behavior near the critical points of polymer solutions and polymer blends is always of mean-field character ... 

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