Comparison of processes

When the data are already in the computer, tracking lab performance using statistical techniques can be done with Htde effort. By having the data archived, historical trends can be charted and past process capabiUty compared to current capabiUty. This can be useful in responding to challenges to test results (30). The avadabihty of production data makes periodic comparison of process capabiUty to specification limits easy. 

A graphical comparison of process performance data to computed control limits drawn as limit lines on the chart. 

Fig. 3. Comparison of processing heat stability at 230°C of HIPS/HBCD...

Comparisons of processes for mass production of DME in a slurry bed reactor... 

TABLE 20-1 Comparison of Processes Involving Crystallization from the Melt... 

In the second phase searches were made on the system and subsystem level. This is needed for the comparison of process alternatives and for the design of the exothermic reactor and its heat transfer systems. Carbonylation of methanol is an exothermic reaction. Thus only the exothermal reactors were searched. The CBR search found two cases which are general recommendations on the design of exothermic reactors with heat transfer systems. They are shown in Fig. 8 and 9. 

The Inherent Safety Index, ISI, was developed to consider a wider range of factors affecting the inherent safety of the process (Ch. 8). The ISI allows the evaluation of inherent safety of process alternatives to be done in a computerized process synthesis environment. The represented synthesis approach allows the inherent safety comparison of process alternatives to be done flexibly and interactively in the conceptual design phase. 

Table 16.1-2. Comparison of Process-Centered and Product-Centered Processing...

All estimates are based on this author s interpretation of patent literature and similar treatment of capital and operational costs. The comparisons of processes are made for one throughput size, 22700 tonnes annually or 50000000 annual pounds of feed. 

Hahn, G.J. (1982b), On-Line Comparison of Process Alternatives, CHEMTECH, 12, 741-743. 

Figure 3.26 Variogram analysis of one identical product from six different production sites - from six different countries, each employing local raw materials. Six variograms allow for critical corporate comparison of process stability/quality versus sampling (see text for full details). Sill levels for all six cases are highlighted. Panels are labelled top to bottom as A, B, C (left column) and D, E, F (right column).

Table 10.2 Comparison of process liquid waste streams.

Goddin, C. S. Comparison of Processes Treating Gases with High COq Content, presented at the 61st Annual GPA Convention, March 1982. 

Table IV Comparison of Process Variables with Different Carbon Number Ranges for the Production of Sec.-Alcohols ...

Soil moisture can have a significant effect on decomposition (Swift et al. 1979). This is due, in part, to the fact that soil moisture can affect the metabolism of decomposer microorganisms. This effect can be modified by soil texture because bioavailable moisture is determined, in part, by the suction with which water is held between soil particles (matric potential). Thus, the calibration of soils to a known matric potential can lead to the assessment of the effect of bioavailability of moisture in soil (Hillel 1982) and allow for the comparison of process rates between soils at the same matric potential (Orchard and Cook 1983). 

Anodic cyanation has been shown to be a direct process by electrochemical methods in conjunction with the analysis of products from cpe experiments (nos. 11 and 34, Table 8). In addition, cyano radicals can be generated in homogeneous solution, and a comparison of processes initiated by radical cation and cyano radical initiated processes reveals the indiscriminate nature of the latter towards aromatic substrates (cf. also Williams, 1960). This is in contrast to the electrophilic nature of the radical cation process. 

Figure 4. Comparison of processes for sizing yams with conventional or degraded starch...

Figure 5. Comparison of processes for desizing fabrics sized with conventional...

TABLE 4.1 Comparison of Process Parameters for Methanol Carbonylation Processes... 

Figure 2 and Figure 3 show the comparison of Processes 1 to 3 when the extraction conditions are 300 bar and 60°C or 80 C. The most favourable variants of these three processes operate at one or other of these temperatures, thus permitting ready comparison of... 

Comparison of process-related characteristics of various module configurations of organic polymer membranes... 

Figure 1 Comparison of process time and temperature between the conventional solid phase crystallization and the alternating magnetic field crystallization...

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