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P-Cymenesulphonic acid: An organic acid synthesised from citrus waste

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Publication details

JournalCatalysis Today
DatePublished - 1 Aug 2012
Issue number1
Pages (from-to)144-149
Original languageEnglish


An organic acid, p-cymene-2-sulphonic acid, is synthesised from citrus waste and demonstrated to be comparable to p-toluenesulphonic acid in examples of acid catalysis. Firstly the essential oil found in citrus waste is extracted by either steam distillation or microwave irradiation. Oxidising the limonene in the citrus oil to p-cymene followed by sulphonation gives p-cymene-2-sulphonic acid.

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