73384-82-4Relevant academic research and scientific papers
Method for preparing 1,3-propane sultone
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Paragraph 0027; 0035; 0036; 0037, (2018/07/30)
The invention discloses a method for preparing 1,3-propane sultone. The method comprises the following steps: 1) mixing 1,3-dihalopropane and a sulfonating agent and a solvent, and performing a sulfonation reaction under certain temperature to obtain 1-halogenated-3-sodium 1-propanesulfonate; 2) adding the 1-halogenated-3-sodium 1-propanesulfonate in water, adding strong acid for adjusting a pH value to 1-3, performing acidifying treatment, performing concentration, filtering the material to remove inorganic salt, and performing concentration to a dry state to obtain 1-halogenated-3-moropholino ethanesulfonic acid; and 3) heating the 1-halogenated-3-moropholino ethanesulfonic acid under vacuum condition, and performing a lactonization reaction to obtain the 1,3-propane sultone. The methodhas the advantages that 1) the toxicity of an used raw material 1,3-dihalopropane is smaller, the 1,3-dihalopropane is safer, is easily available, and is recoverable and repeatedly used, and is convenient for storage, so that raw material and operation cost of the raw material can be greatly reduced; and 2) three-waste output in the method is less, environment pollution is reduced, environment pollution is reduced, the purity of the produced product is high and can reach more than 99%, and the water content of the product is lower than 0.1%.
