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Technical & Practical

Improve Your Contingency Estimates for More Realistic Project Budgets

The average large project in the chemical process industries (CPI) overruns its sanctioned budget, including contingency, by 21%. Even more alarming, 10% of large projects overrun their budget by more than 70%. These are findings based on research by the…

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Wire Meshes in Filtration

Fabricated metal-wire mesh is one of the major categories of filter media. Woven metal cloths are often used to support a filter aid coating or a bed of granular or porous material. Proper selection of wire cloth can have a…

Bulk Solids: Operating Direct-Contact Heat Exchangers

Bulk solids are frequently used as reactants, catalysts or products in chemical process industries (CPI) operations. Often, they must be heated or cooled so that they can be handled safely or processed at a desired temperature. Traditionally, heat transfer to…

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Design of Experiments (DoE): Optimizing Products and Processes Efficiently

Experiments are done to quantify cause-and-effect relationships between adjustable parameters (inputs, factors, x) and the results (outputs, responses, y). They help to answer questions like: How do the ingredients and proportions of a mixture (inputs) influence its properties (outputs)? How…

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Critical Connections Demand Certainty

Figure 1.  During tightening, hydraulic pressure load within a bolt should be uniformly and accurately applied to avoid gasket damage and other issues that can create leakage Common knowledge dictates that planning ahead ensures effective results, regardless of the task…

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D,L-methionine production via the carbonate process

Methionine is an essential amino acid that is not synthesized by animals, so it must be obtained from their diets. Synthetic methionine is traditionally commercially available in two varieties: D,L-methionine (DLM), a racemic mixture of the two stereoisomers, and methionine…

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Burner Inspection and Maintenance

Burners are mechanical devices that are utilized for mixing proper quantities of fuel and air, and also for maintaining a stable flame inside fired equipment. Burners are critical components that must be periodically maintained to ensure the reliability of fired…

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November Letters Facts at Your Fingertips: Forces Acting on a Gasket

This letter is in reference to the article, Forces Acting on a Gasket [ Chem. Eng. October, 2014, p. 32a]. I need to clear my understanding on the seating stress required for the proper sealing. As per the article, seating…

Reactive Chemistry in the CPI

Reactive chemicals and intermediates are used extensively in the chemical process industries (CPI). Hazardous chemical reactivity can be defined as “any chemical reaction with the potential to exhibit rates of increase in temperature and/or pressure too high to be absorbed…

The Next Step Change in Process Safety

From plastics and synthetics to fertilizers and fuel, the general public takes for granted so much of what the chemical process industries (CPI) produces, and the risks associated with CPI production facilities are not typically considered. That is, until the…