Process and device system for production of dimethyl oxalate by high-pressure carbonylation of industrial synthesis gas and hydrogenation to ethylene glycol
A dimethyl oxalate, medium and high pressure technology, used in the preparation of nitrite, carbon monoxide or formate reaction preparation, chemical instruments and methods, etc., can solve the problem that a single series of equipment cannot be adapted, high system consumption, and low catalyst utilization And other issues
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[0145] As a preferred embodiment, the esterification reaction tower 9 is a packed tower;
[0146] As a more preferred embodiment, the esterification reaction tower 9 is a tray-packing mixed tower having both a tray part and a packing part.
[0147] As a preferred embodiment, the methanol washing column 7, methanol rectification column 5, methanol recovery column 11, NO recovery column 13, MN recovery column 15, DMO rectification column 6 and nitric acid concentration column 12 are packed columns, Tray or bubble column.
[0148] As a preferred embodiment, the packing packed in the packed tower is random packing or high-efficiency structured packing; the shape of the random packing is saddle shape, Raschig ring, Pall ring, wheel shape, rectangular saddle Ring, spherical or columnar; the high-efficiency structured packing is corrugated packing, grid packing, pulse packing. .
[0149] The hydrogenation plate reactor 17 can be a plate reactor, a tubular reactor or a tubular-plat...
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