Multi-step processing in a microstructured flow reactor: direct nitration of propane–a proof of principle

Green Processing and Synthesis

article

Holger Löwe¹  Gong Wei²  Ma Jiang²  Christian Hofmann¹  Hans-Joachim Kost¹  Christian Schütt¹ 

[1] IMM Institut fuer Mikrotechnik Mainz GmbH;Shenyang Cenkey Chemical Co. Ltd.

关键词: gas-phase;    micro reactor;    nitration;    nitro alkanes;   

DOI  :  10.1515/gps-2012-0054

来源: De Gruyter

【 摘 要 】

The vapor phase nitration of propane was successfully investigated in a multi-step microstructured reactor. The concept integrates heating, evaporation of reactants, the reaction channel, and the quenching and cooling of the product mixture; all done in a reactor with one plate. The nitration of propane with evaporated nitric acid was carried out at 380°C–450°C. This radical chain reaction was subsequently quenched, in a fast manner due to the high surface-to-volume ratio of the reaction channel. Therefore, the conversion of propane was deliberately kept low (approx. 2%) but at favor of selectivity for 2-nitropropane which increases remarkably. The harsh reaction conditions require a sophisticated microreactor concept, the use of an exceptional construction material, that is, an uncommon stainless steel alloy, as well as a process design which avoids NO x release into the environment.

【 授权许可】

CC BY