Technical & Practical
The Mass Balance
More and more, it is recognized that business and science are interwoven, and that these disciplines can complement each other to achieve corporate goals. In the chemical process industries (CPI), a noteworthy role is that of engineering in…
Antoine Coefficients for Vapor Pressure of the Elements
Vapor pressure is important to engineers throughout the chemical process industries (CPI). Knowledge of a compound's vapor pressure is required in the design of storage vessels containing the compound. In hazard analysis, knowledge of vapor pressure…
Making Emulsions
When Estee Lauder begin stirring up recipes for facial creams recipes in her kitchen some 70 years ago — the start of a $6.5-billion cosmetics empire that still bears her name — making high-purity emulsions was…
The Do’s and Don’ts Of Chute Design
The need to transfer bulk-solids materials from the outlet of a bin or from a conveyor, to a process, truck, or another bin is ubiquitous throughout the chemical process industries (CPI). Transferring material using equipment designed to mechanically…
Get the Most Out of Waste Heat
The process industries are extensive users of energy. But it is now clearly established that a large amount of this energy is wasted, essentially in the form of heat rejected to the environment through gaseous or liquid effluents.…
Wastewater: A Reliable Water Resource
Water is an essential resource for the chemical process industries (CPI), with steam, cooling water and process water as just a few examples of its many applications. When readily available, this essential commodity is often taken for granted.…
Heuristics Rules for Process Equipment
Provided that they are updated when appropriate to keep them relevant, time-tested heuristics rules based upon experience, also referred to as rules of thumb, can be useful for the design, specifying and operation of several kinds of equipment…
Specifying CPVC In Chemical Process Environments
Since its introduction to the market in 1959, chlorinated polyvinyl chloride (better known as CPVC) has proven suitable for use in a wide variety of chemical process environments. Because it is inert to most mineral acids, bases, salts…
Measurement Best Practices for Safety Instrumented Systems
The ANSI/ISA-S84.01-1996 standard, which has guided North American users for the past decade in designing safety instrumented systems (SIS) has migrated to a new international standard based on the IEC 61511 and is now known as ANSI/ISA-84.00.01-2004 (IEC…
Getting the Most Out of Intelligent Devices
Since their inception, data buses have been highly acclaimed in the chemical process industries (CPI) for their potential to achieve interoperability and substantial wire-savings - advantages that are particularly easy to envision for a theoretical case in which…