Synthesis process of 2, 4-dihydroxybenzoic acid

The invention relates to the technical field of 2, 4-dihydroxybenzoic acid synthesis, and provides a 2, 4-dihydroxybenzoic acid synthesis process, which comprises: carrying out a mixing reaction on water, a catalyst, sodium bicarbonate and resorcinol to obtain 2, 4-dihydroxybenzoic acid, the supported catalyst is obtained by treating a carrier with a mixed solution of ammonium hexafluorophosphate and diethylamine and then impregnating with an active component solution. Through the technical scheme, the problems of low product yield and low purity in the synthesis process of 2, 4-dihydroxybenzoic acid in the prior art are solved. 本发明涉及2,4-二羟基苯甲酸合成技术领域，提出了一种2,4-二羟基苯甲酸合成工艺，包括以下步骤：将水、催化剂、碳酸氢钠和间苯二酚混合反应后，得到2,4-二羟基苯甲酸，所述催化剂为负载型催化剂；所述负载型催化剂为将载体经六氟磷酸铵和二乙胺的混合溶液处理后，再经活性组分溶液浸渍得到。通过上述技术方案，解决了现有技术中2,4-二羟基苯甲酸合成工艺中产物收率低、纯度低的问题。