Controlling flow in gas-handling applications can present challenges because of the fluids’ compressibility. This article presents an overview of how compressible gases behave in response to interacting variables Gas-handling operations are common in almost every sector of the chemical process…
The Chemical Activity Barometer (CAB) a leading economic indicator created by the American Chemistry Council (ACC; Washington, D.C.), fell 5.4 percent in May on a three-month moving average (3MMA) basis following a 5.4 percent decline in April. On a year-over-year…
According to the American Chemistry Council (ACC; Washington, D.C.), the U.S. Chemical Production Regional Index (U.S. CPRI) tumbled 3.1 percent in April following a 1.0 percent decline in March and a 0.4 percent decline in February. During April, chemical output…
The American Chemistry Council (ACC; Washington, D.C.) reported that U.S. specialty chemicals market volumes fell 11.3 percent in April, accelerating from a 4.0 percent decline in March and a 0.5 percent decline in February. Of the 28 specialty chemicals segments…
Chemetry Corp. (Moss Landing, Calif.; www.chemetrycorp.com) is piloting a hybrid electrochemical-catalysis process for making propylene oxide (PO) that eliminates some of the major production hurdles associated with chlorohydrin-based PO production. “The traditional chlorohydrin process produces about 47 tons of wastewater…
A new electrochemical process could make triphenylphosphine (TPP) — an important reagent in many organic transformations — more practical for industrial use. Synthesizing TPP results in large volumes of waste in the form of triphenylphosphine oxide (TPPO), which is very…
By replacing part of cement clinker with calcined (thermally activated) clay, CO2 emissions in cement production are lowered by up to 40%, according to thyssenkrupp Industrial Solutions AG (Essen, Germany; www.thyssenkrupp-industrial-solutions.com), which developed the technology known as “polysius activated clay.”…
Industrial crystallization processes are widely used in the chemical process industries (CPI) for their ability to separate and purify products in a single step, often to greater than 99.9% purity. Crystal growth proceeds after nucleation, a molecular aggregation process whereby…
This column is based on “Vinyl Chloride Production from Ethylene and Chlorine – Cost Analysis,” a report published by Intratec. It can be found at: www.intratec.us/analysis/vinyl-chloride-production-cost. Vinyl chloride (also known as vinyl chloride monomer, VCM and chloroethene) is an organochloride…
An understanding of the available NOx-reduction strategies will help engineers to select the best technique to improve the performance of their combustion processes Pollution due to oxides of nitrogen — frequently abbreviated as NOx — is regulated with varying degrees…