Monoethylene glycol (MEG), also known as ethylene glycol (EG) or simply glycol, is a diol mostly used for the production of polyester fibers and polyethylene terephthalate (PET) resins. It is also used in antifreeze applications and in pharmaceuticals and cosmetics.…
The pipe-flow equation presented here can be used to properly and easily size pipelines for liquid, vapor and two-phase flow. Example calculations are also shown Sizing pipelines is a fundamental task for design engineers, who typically use several equations to…
Turndown and rangeability have a big impact on the flexibility and efficiency of chemical process operations During the design of a chemical process plant, the main focus is on which process units or unit operations must be integrated to convert…
Secondary treated wastewater from municipal plants can be a water resource for industry. Important water characteristics and treatment options are discussed Water is a precious resource, and water quality and water pollution are important issues. Many companies and industries are…
How shear-cell testing provides a basis for predicting flow behavior Powder jams are the once-in-a-month catastrophe that can bring processing operations to a standstill. Whether it’s erratic flow behavior or complete stoppage of solids discharge, the consequence is the same.…
Electric alternating current (a.c.) motors power all types of equipment in the chemical process industries (CPI), including pumps, fans, blowers, compressors and other types of process equipment. Electric motor systems offer opportunities for reductions in power consumption because while some…
Polylactic acid (PLA) is the biodegradable polymer of lactic acid, which is produced via fermentation processes. For the last five decades, PLA has been mainly used in biomedical applications. The development of economical production routes and a rising environmental awareness…
The step-by-step procedure described here can help operators to optimize reactor operation and output Engineers throughout the chemical process industries (CPI) commonly encounter situations where different materials have to be contacted inside a reactor to drive the chemical transformations needed…
Understanding the nuances of low-temperature engineering is key to safe and efficient operations Extremely low temperatures — below –100°F (–73.3°C) — have many widely diverse commercial uses, from de-flashing of molded rubber parts on the plant floor to pristine storage of…
Selecting the right pressure, temperature, flow and level meters and connection systems can help to eliminate the need for heated enclosures and sensing lines In an environment where the ambient temperature can fall below –20°C, outdoor measurements can suffer from…