What are the production methods for industrial benzoic acid?
Release time:
2021-11-12
The production methods of industrial benzoic acid are mainly as follows:
Toluene oxidation: This is a commonly used production method. In this method, toluene undergoes an oxidation reaction with air or oxygen at high temperatures to produce benzoic acid. This method is a mature process with high yield, but it consumes a lot of energy and produces wastewater and exhaust gases that need to be properly treated.
Toluene chlorination hydrolysis method: toluene is first chlorinated with chlorine gas to form chlorinated toluene, and then hydrolyzed to obtain benzoic acid. This method was used in industrial production in the early years, but it is now less used due to environmental concerns.
Benzyl alcohol oxidation method: Benzyl alcohol undergoes oxidation reaction under the action of a catalyst to generate benzoic acid. This method is relatively mild, but the cost of raw benzyl alcohol is higher.
Phthalic anhydride decarboxylation method: Phthalic anhydride is decarboxylated under heating conditions to produce benzoic acid. This method is suitable for the industrial production of phthalic anhydride.
Each of these methods has its own advantages and disadvantages, and which method to choose in actual production needs to be comprehensively considered according to specific production conditions, raw material sources, energy consumption, environmental protection requirements and other factors. At the same time, with the development of science and technology, new production methods and technologies are also emerging, providing more possibilities for the production of industrial benzoic acid.
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