Reactor Design and Kinetic Study on Adsorption/Desorption of CO and Cl₂ for Industrial Phosgene Synthesis

Abstract

The aim of this work is the utilization of carbon monoxide (CO) from steel mill gases for the synthesis of phosgene, which can further react with phenol to building blocks for polymers. The effect of impurities like NOx, CO2, and O2 on the activity and stability of the activated‐carbon (AC) catalyst and the follow‐up products should be evaluated. Therefore, new porous carbon catalysts and a new reactor are designed for a systematic kinetic study on the adsorption and desorption behaviors of CO and chlorine (Cl2) on carbon‐based materials to identify AC catalysts with optimum physical properties.

A Theoretical Study on the Phosgenation of 2,4-Toluenediamine (2,4-TDA)

“…The distillation residue formed is hydrolyzed at <230 °C under absolute pressures of less than 30 bar [ 5 ]. For these process, the reactive phosgene compound is produced by passing purified carbon monoxide and chlorine gas through a bed of porous activated carbon [ 6 , 7 ].…”

Cl2 Adsorption and Desorption over Ordered Mesoporous Carbon Materials as an Indicator for Catalytic Phosgene Formation

“…The Cl 2 adsorption/desorption experiments were carried out in a flow setup previously described in another work . For a typical experiment, 250 mg of carbon material were fixed with quartz wool inside a quartz tube.…”

“…Phosgene formation experiments were conducted in the setup described in an earlier work . Briefly, 25 mg of carbon material were mixed with 1 mL of quartz sand (Supelco Analytical) as inert material and filled in the reactor to obtain a catalyst bed with a length of 3.5 cm.…”

Carbon2Chem® – Technical Center in Duisburg

“…4. From the coking plant, the blast furnace and the converter a total of 240 Nm 3 released via a pipeline bridge directly to the gas cleaning section of the pilot plant. There the impurities of the top gases are firstly removed.…”