Preparation method of salicyl fluorescent ketone

The invention discloses a preparation method of salicyl fluorescein, which comprises the following steps: S1, mixing 1, 2, 4-trihydroxybenzene acetate, ethanol and concentrated sulfuric acid, heating to 70-80 DEG C, adding salicylaldehyde, stirring and reacting at constant temperature for 3-5 hours,...

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Bibliographic Details
Main Authors HUA JIAJUN, ZHOU YONG, CHEN CHENG
Format Patent
LanguageChinese
English
Published 12.05.2023
Subjects
ADHESIVES
CHEMISTRY
DYES
HETEROCYCLIC COMPOUNDS
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
ORGANIC CHEMISTRY
PAINTS
POLISHES
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Summary:The invention discloses a preparation method of salicyl fluorescein, which comprises the following steps: S1, mixing 1, 2, 4-trihydroxybenzene acetate, ethanol and concentrated sulfuric acid, heating to 70-80 DEG C, adding salicylaldehyde, stirring and reacting at constant temperature for 3-5 hours, and cooling reaction liquid to room temperature; s2, oxygen is continuously introduced into the reaction liquid cooled to the room temperature in the step S1, a precipitate is separated out through a reaction, the precipitate is washed and subjected to suction filtration, solid matter obtained through suction filtration is dried, and salicyl fluorescein is obtained; wherein in the step S2, in the reaction process, oxygen is continuously introduced into the reaction liquid, the speed of introducing the oxygen into the reaction liquid is 100-300 ml/min, and the reaction time is 16-40 h. The preparation method of the salicyl fluorescein has the advantages of short preparation route, mild reaction conditions, low reac
Bibliography:Application Number: CN202310124190