Continuous production process and device of benzoic acid
A production process and production device technology, applied in the field of benzoic acid continuous production process and its device, can solve the problems of difficult temperature control, lower work efficiency, prolong working time, etc., achieve temperature and stability, improve production efficiency, and shorten reaction time Effect
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Embodiment 1
[0059] A continuous production process for benzoic acid, comprising the following steps:
[0060] ⑴. Pass the toluene liquid and the catalyst from the bottom of the reaction tower, the catalyst is mainly octanoic acid metal, and the weight percentage of the metal is: manganese: 1.3%; cobalt: 5%; nickel: 0.3%;
[0061] ⑵. Air is introduced from the bottom of the reaction tower, and the air and toluene liquid react under the action of the catalyst. One or more gas-liquid distributing agitators are installed at the bottom of the reaction tower, and the air is discharged through the distributing agitators, which can fully stir and react with toluene while forming tiny bubbles;
[0062] ⑶. During the reaction process, use a temperature-controlling heat exchanger to control the temperature in the reaction tower, and the temperature range is 160-170°C. The temperature-controlling heat exchanger is two tubular heat exchangers used in series;
[0063] ⑷. After the reaction material pa...
Embodiment 2
[0067] A continuous production process for benzoic acid, comprising the following steps:
[0068] ⑴. Pass the toluene liquid and the catalyst from the bottom of the reaction tower, the catalyst is mainly octanoic acid metal, and the weight percentage of the metal is: manganese: 1.8%; cobalt: 6%; nickel: 0.7%;
[0069] Step (2)-(4) is identical with embodiment 1.
Embodiment 3
[0071] A continuous production process for benzoic acid, comprising the following steps:
[0072] ⑴. Pass the toluene liquid and the catalyst from the bottom of the reaction tower, the catalyst is mainly octanoic acid metal, and the weight percentage of the metal is: manganese: 2.3%; cobalt: 7%; nickel: 1%;
[0073] Step (2)-(4) is identical with embodiment 1.
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