Catalyst immobilization in decane and repetitive hydrogenation of CO2 to HCOOH-amine with subsequent reactive distillation of the resulting methanolic solution.

The capture of carbon dioxide and its utilization as a building block in chemical synthesis aim at reducing the depletion of fossil resources and the emission of greenhouse gases. The project Carbon2Chem®‐L5 is dedicated to the development of processes using CO2 for the production of polymer building blocks for polyurethanes. In this work, a process concept is presented for the CO2‐based synthesis of diisocyanates, the main starting material in polyurethane manufacture. Key parameters for process performance are discussed.

Table I Exchange Reactions Catalyzed by the P Enzyme In experiment A, the complete system contained 1.3 µ . succinyl CoA, 50 µ . TRIS pH 7.4, 5 µ . C14-succinate, 0.17 mg. enzyme protein (5.2 units), 5µ . P04 and 5µ . MgClj; 2.5 µ . ADP added when indicated; final volume 1.0 ml.; incubated 6 minutes at 20°. After incubation, NH2OH was added and the succinohydroxamic acid separated from succinate by chromatography on Dowex 1. About 0.90-1.17 µ .of succinohydroxamic acid was isolated from the column.

The settling behavior of liquid‐liquid dispersions at ambient temperature and pressure is well investigated. However, little is known about the settling behavior of those systems at high pressure and high temperature. In this work, a novel stainless steel settling cell is presented, enabling investigations on liquid‐liquid settling behavior at high pressures up to 130 bar. The settling behavior of a promising CO2 hydrogenation reaction system is investigated by sequentially determining influences of dissolved CO2, side components, and temperature.