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106 results about "Salicylic acid ester" patented technology

Carboxylic acids. In carboxylic acid: Aromatic acids In methyl salicylate (oil of wintergreen), the COOH group of salicylic acid is esterified with methanol (CH3OH), whereas in acetylsalicylic acid (aspirin) the acid component of the ester is acetic acid, and salicylic acid contributes the phenolic −OH group.

Salting extractant and separating method for extracting and rectifying m-methylethylbenzene and p-methylethylbenzene from C9 mixture

The invention relates to a salting extractant and a separating method for extracting and rectifying m-methylethylbenzene and p-methylethylbenzene from a C9 mixture to mainly solve the technical problem of difficult separation of m-methylethylbenzene and p-methylethylbenzene in a C9 aromatic hydrocarbon mixture. Salicylate is adopted as an extractant in the sating extractant, thiocyanate is adopted as a salt in the salting extractant, the C9 aromatic hydrocarbon mixture is introduced to a heavy component removal tower with the top provided with an effusion tank and undergoes batch rectification, unstrimethylbenzene and hemimellitene are extracted from the bottom of the removal tower, a tower top flow stream is introduced to an extraction rectifier and is extracted and rectified, m-methylethylbenzene and p-methylethylbenzene are extracted from the top of the extraction rectifier, a rectifier bottom flow stream enters a solvent recovery tower, o-methylethylbenzene and mesitylene are obtained at the top of the solvent recovery tower, and the salting extractant obtained at the bottom of the solvent recovery tower can be recycled. The salting extractant and the separating method well solve the problem and can be used in the field of C9 aromatic hydrocarbon mixture separation.
Owner:CHINA PETROLEUM & CHEM CORP +1
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