| abstract |
The present invention relates to a bubble column having a perforated bottom. The bubble column can be operated in countercurrent. The disclosure yield of the gas-liquid reaction is that the lower perforations 5 have holes of substantially the same distribution, the cross-sectional area of each hole is 0.003 to 3 mm 2, in particular 0.01 to 0.5 mm 2, and the open area of the lower part is 3 to 20%, especially Up to 3 to 10% and can be substantially increased if a liquid flow passage 6 is provided between the liquid regions adjacent to the bubble column. Bubble columns can be used to carry out gas-liquid reactions such as oxidation reactions using air, whereby gas and liquid are preferably carried out co-currently through the bubble column.n n n n Bubble column, perforated tray, countercurrent, cocurrent, gas-liquid reaction. |