Chemical product - process design

To tackle these problems successfully, new concepts will be required for developing systematic modeling techniques that can describe parts of the chemical supply chain at different levels of abstraction. A specific example is the integration of molecular thermodynamics in process simulation computations. This would fulfill the objective of predicting the properties of new chemical products when designing a new manufacturing plant. However, such computations remain unachievable at the present time and probably will remain so for the next decade. The challenge is how to abstract the details and description of a complex system into a reduced dimensional space. 

Vol. 594 R. Hiibner, Strategic Supply Chain Management in Process Industries An Application to Specialty Chemicals Production Network Design. XII, 243 pages, 2007... 

More speculatively, cascade chemistry has been proposed as an environmentally friendly approach to chemical synthesis. Process design mirrors nature in that the process of producing an intermediate leads to an active product that progresses to a further activated intermediate and so on down the cascade to a needed product see Hall, N. Science, 1994, 266, 32. 

Table 4, Twelve Principles of Green C iieinisiry." serves to provide a road map for chemists and chemical engineers to implement the use of sound, responsible chemistry for P2, or green chemistry, during the conceptual design of chemical products/processes in order to reduce or eliminate the use and generation of hazardous substances. ...

Based on thermodynamical and kinetic descriptions of the individual process steps, a meta-model can be developed which is able to describe and predict the behaviour of a whole chemical production process. Such a process model can be developed for different purposes and at different levels of detail To design a chemical production process, a detailed model of the potential plant(s) necessarily includes the description of the system s dynamics. In contrast, once the production process is designed, a model is necessary to describe the dependency of the system s output w.r.t. certain control parameters. Figure 2.6 depicts a prototypical procedure in chemical process modelling. 

In a conventional design of chemical production process, the reaction and separation functions are carried out by two different processing units, as illustrated in Figure 1.10(a), where a membrane separator is used for product separation. If the membrane is placed inside the reactor to carry out the separation function as shown in Figure 1.10(b), it then becomes a membrane reactor. Since the reaction and separation proceed simultaneously, the separation of products can be accomplished in the reactor unit itself, or at least the downstream separation load can be... 

Liquid adsorption processes hold a prominent position ia several appHcations for the production of high purity chemicals on a commodity scale. Many of these processes were attractive when they were first iatroduced to the iadustry and continue to iacrease ia value as improvements ia adsorbents, desorbents, and process designs are made. The UOP Parex process alone has seen three generations of adsorbent and four generations of desorbent. Similarly, Hquid adsorption processes can be applied to a much more diverse range of problems than those presented ia Table 3. 

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