- Preparing method of 8-hydroxy-1,3,6-pyrene trisulphonic acid sodium salt
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The present invention discloses a preparing method of 8-hydroxy-1,3,6-pyrene trisulphonic acid sodium salt, pyrene is used as a raw material, sulfuric acid is used as a medium, after pyrene is dissolved, sulfur trioxide is added dropwise into the system, the system is stirred for reaction for 5 hours, the material is diluted in ice water to obtain paste-like pyrenetetrasulfonid acid tetrasodium salt, after filtering and draining, the pyrenetetrasulfonid acid tetrasodium salt is dissolved in water, added with a certain amount of sodium hydroxide, and kept warm at 100 DEG C for hydrolysis reaction to obtain the 8-hydroxy-1,3,6-pyrene trisulphonic acid sodium salt, the preparing method of the 8-hydroxy-1,3,6-pyrene trisulphonic acid sodium salt has the following benefits: after isolation and purification, the 8-hydroxy-1,3,6-pyrene trisulphonic acid sodium salt yield is 90% to 95%, the yield is high; the method is simple and efficient, the reaction steps are greatly reduced, cost is saved, and time is saved.
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Paragraph 0008; 0027
(2017/03/08)
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