Glacial acetic acid

Brief introduction of production process of acetic acid:

The oxidation of alcohol: 95% alcohol and 76% alcohol in the workshop recycled ingredients in tank mixing ratio was 84 + 0.5% diluted alcohol, alcohol evaporated into the pot heating oxidation furnace, 555 + in the reaction temperature of 5 degrees centigrade and the electrolytic silver catalyst to produce acetaldehyde reaction gas, mixed gas after being condensed into the absorption tower is the absorption of water once diluted about 8-10% of acetaldehyde.

Acetaldehyde refining and alcohol recovery: dilute acetaldehyde by pump pressure into the acetaldehyde distillation tower distillation, control tower top temperature at 45 + 2 degrees Celsius, pressure 0.15Mpa, the top of the tower was pure acetaldehyde. Reactor temperature control at 121 - 3 DEG C, the material itself is pressed into the distillation of alcohol recovery tower, tower top temperature is controlled at 90 - 5 DEG C overhead produced about 76% alcohol for the alcohol oxygen chemical ingredients used in order, reactor temperature control in 110 + 3 DEG C, passing through the reactor discharge of wastewater.

Acetaldehyde oxidation: Acetaldehyde by measuring pressure after the pump into the oxidation tower, with the compressed air from the air at the temperature of 50~80 degrees Celsius, pressure 0.20~0.22Mpa and a certain amount of manganese acetate catalyzed reaction to produce crude acetic acid. The crude acetic acid by oxidation tower outlet exhaust to the crude acetic acid storage tank, not by the reaction of acetaldehyde is condensed by the condenser after separation, liquid return to the bottom of the exhaust after oxidation, into the bubbling absorber further absorbed into the atmosphere.

Acetic acid refining: crude acetic acid by high Feiguo evaporation will increasedrestructuring manganese acetate separation, high boiling evaporation boiler temperature control at 120 - 2 DEG C, Mn cycle trough cycle with high Feiguo manganese acetate into acetaldehyde oxidation process at the bottom of the use. At the top of the light component in the concentrated distillation column, column reactor temperature control at 123 - 3 DEG C, into the finished evaporating pot tower continuous quantitative acetic acid, in 120 + 2 DEG C after distillation condensation to acetic acid into the finished metering groove after analysis after passing into finished product tank. Tower top temperature control at 100 + 2 degrees Celsius, the top of the tower of the dilute acid into the metering tank, after metering into a dilute acid tank.