Preparation method of gallic acid catalyzed by sulfinic acid or sulfonic acid derivative
The invention relates to the technical field of chemical engineering and biological medicines, in particular to a preparation method of gallic acid catalyzed by sulfinic acid or sulfonic acid derivatives, which specifically comprises the following steps: adding tannic acid or a raw material containi...
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Main Authors | , , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
18.08.2023
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Subjects | |
Online Access | Get full text |
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Summary: | The invention relates to the technical field of chemical engineering and biological medicines, in particular to a preparation method of gallic acid catalyzed by sulfinic acid or sulfonic acid derivatives, which specifically comprises the following steps: adding tannic acid or a raw material containing tannic acid, water and a catalyst into a reaction flask, uniformly mixing, heating to 100-110 DEG C, heating to react, and mixing and stirring for 2-3 hours; adding hydrochloric acid to adjust Ph after the reaction is finished, filtering while hot, cooling and crystallizing to obtain a crude product; and recrystallizing the crude product to obtain a gallic acid product. The invention optimizes and improves the traditional alkaline process, explores a novel gallic acid preparation method, and uses commercial inorganic salt sodium sulfite as a catalyst to catalyze the hydrolysis of tannic acid, tara, gallnut and the like to prepare gallic acid. Compared with a traditional alkaline process, the method is mild in ca |
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Bibliography: | Application Number: CN202310581145 |