| abstract |
The invention discloses a metal-free catalytic oxidation system, an oxygen oxidation method and a production method applied to benzoic acid derivatives, belonging to the field of metal-free catalytic oxidation systems and comprising a raw material input device, a tubular reactor, a plurality of Venturi nozzles arranged on the tubular reactor at intervals, a continuous tubular filter, a solid-phase product output device connected to the solid-phase output end of the continuous tubular filter and a reaction liquid intermediate tank connected to the liquid-phase output end of the continuous tubular filter; the output end of the Venturi nozzle forms a low-pressure area, and the oxygen input port corresponds to the low-pressure area; the continuous tube type filter is internally and externally provided with two mutually sleeved tube parts, and the inner tube is provided with small holes for solid-liquid separation; the solid-phase product output device is positioned at the tail end of the inner tube; the reaction liquid intermediate tank is communicated with the outer sleeve of the continuous tubular filter through a pipeline. The problems of heavy metal pollution, difficult catalyst separation, catalyst loss and the like caused by the metal catalyst are solved, the production efficiency is improved, and the production safety is improved. |