FIELD: chemistry.
SUBSTANCE: present invention relates to a method and system of devices for producing dimethyl oxalate by carbonylation of industrial synthesis gas at medium and high pressure and producing ethylene glycol by hydrogenation of dimethyl oxalate. Method includes the following steps: use of industrial NO, O2 and methanol as starting materials for carrying out the esterification reaction to obtain methyl nitrite, then the use of industrial CO and methyl nitrite to conduct a carbonylation reaction in a plate reactor to produce carbonylation products, mainly comprising dimethyl oxalate and dimethyl carbonate, separation of carbonylation products to produce dimethyl carbonate products, and then hydrogenating the dimethyl oxalate in a plate reactor to produce ethylene glycol products; and performing joint regeneration of the spent acid of the esterification reaction and the purge gas of the carbonylation reaction for reuse. System comprises an esterification reaction system, a carbonylation reaction system, a combined purge gas and spent acid regeneration system and a hydrogenation reaction system.
EFFECT: method provides a significant reduction in the consumption of the device, and in particular by means of a high reconciliation of the recycled fluid containing nitric acid and the re-use of the purge gas and the method of their separation, significant effects of regeneration and reuse of the starting materials in the reaction waste gas are achieved.
42 cl, 2 dwg
