Title: Improved process for preparing edible grease antioxidant 2-tert-butyl hydroquinone
Application Number: 200510034581 Application Date: 2005.05.13
Publication Number: 1699318 Publication Date: 2005.11.23
Approval Pub. Date: 2006.09.27 Granted Pub. Date: 2006.09.27
International Classifi-cation: C07C37/14,C07C39/08,A23D9/00,A23L3/349
Applicant(s) Name: Guangdong Food Industry Institute Address: 510308
Inventor(s) Name: Li Chunrong, Li Hua, Lin Hong
Attorney & Agent: li haibei
Abstract:
     Disclosed is an improved process for preparing edible grease antioxidant TBHQ which comprises the steps of, (1) subjecting hydroquinone and isobutene to tert-butylation reaction using 70% phosphoric acid as catalyst in a dual solvent system comprising aromatic hydrocarbon solvent and ketones solvent, (2) separating the main product TBHQ and by product DTBHQ of the reaction, (3) mixing the byproduct DTBHQ hydroquinone with next batch of hydroquinone, charging acid catalyst for backflow, carrying out alkyl transfer reaction, (4) separating the transfer reaction catalyst from the reaction system, charging 70% of phosphoric acid into the reaction system as catalyst, (5) repeating step (1)-(4).
Time: 11
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