Study on New Synthesis Technology of 1,3-Benzenedisulfonic Acid Sodium
In order to solve the problem of producing a large amount of waste salt and acid in the synthesis of sodium disulfonic acid by the traditional method,using benzene and sulfur trioxide as raw materials,benzenesulfonic acid was synthesized at 60℃,after adjusting the base,benzenesulfonic acid was continuously sulfonated with sulfur trioxide at high temperature to produce 1,3-benzenedisulfonic acid.The optimum conditions of synthesis were studied systematically.The results showed that the yield of 1,3-benzenedisulfonic acid sodium reached 93.5%under the optimum conditions,and the amount of waste was reduced obviously.
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