Can a High Reflux Ratio Really Solve Every Distillation Problem? This article is based on a commissioning and troubleshooting assignment I handled several years ago. The project involved a vacuum distillation system that I had not designed. It was also…
A Nine-Part Competency Framework for Distillation Systems A frequently asked question is: What does a distillation process design package include? More broadly, what work is involved in distillation process technology? A qualified specialist in distillation—and particularly in high-vacuum distillation—must integrate…
In chemical engineering, three terms appear throughout project development: Process Design Package, basic engineering, and detailed engineering. Yet their respective roles and relationships are not always clear to new engineers, investors, or project managers. Key questions include: This article explains…
In Flow Chemistry, Volume 2: Applications (2nd ed., De Gruyter, 2021) — a textbook edited by leading figures in flow chemistry including Ferenc Darvas, Volker Hessel, and Steven V. Ley — DODGEN’s commercial millimeter-scale zigzag-tube heat exchange equipment is referenced…
Introduction Searches for “sodium ferrocyanide production process” or “how sodium ferrocyanide is produced” often lead only to reaction equations. In industrial production, however, the process must integrate cyanide-containing feedstocks, complexation reactions, solid-liquid separation, evaporation and concentration, controlled crystallization, and mother…
Meet Us in Shanghai and Explore the Future of the Industry From September 15 to 17, 2026, the 23rd China International Chemical Industry Fair (ICIF China 2026) will be held at the Shanghai New International Expo Centre.As a process intensification…
Introduction When searching for carbon disulfide production process or methane-sulfur carbon disulfide technology, most discussions focus on yield, energy consumption, and safety. However, a co-production process must address another critical question: Can the by-product hydrogen sulfide be consistently purified and…
One of the most critical steps in heat exchanger selection is estimating the heat duty correctly. If the heat duty is overestimated, the exchanger becomes oversized, increasing both capital cost and footprint. If it is underestimated, the required process conditions…
Hydrogen cyanide (HCN) has a normal boiling point of approximately 26°C, making it highly toxic and extremely volatile. As a result, HCN production facilities are typically designed around the principles of closed operation, continuous processing, and minimal hazardous material inventory,…
A battery-grade ethylene carbonate (EC) purification retrofit jointly delivered by Shanghai DODGEN Chemical Technology Co., Ltd. and Shida Shenghua (Quanzhou) Co., Ltd. has been selected as a national low-carbon and energy-saving case by China’s Ministry of Industry and Information Technology…