Oxidative preparation of maleic acid
AssigneeNederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
InventorsJohan URBANUS, Marc CROCKATT, Earl Lawrence Vincent GOETHEER, Roman LATSUZBAIA
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Abstract
The invention is directed to a process for the preparation of maleic acid or a derivative thereof. Said process comprising an electrochemical oxidation of a furoic acid compound into maleic acid in an electrolyte solution; and optionally further comprising a step of reacting the maleic acid to the derivative thereof. In an alternative embodiment, said process comprising a first step comprising an electrochemical oxidation in an electrolyte solution of a furanic compound into one or more intermediates; followed by a second step comprising a chemo-catalytic oxidation of said intermediates to provide maleic acid or a derivative thereof.
Claims21
Process for the preparation of maleic acid or a derivative thereof, said process comprising a first step comprising an electrochemical oxidation in an electrolyte solution of a furanic compound into one or more intermediates;
- wherein said furanic compound is a compound according to formula I of which R1 is H, CH2OH, CO2H or CHO and R2 is H, OH, C1-C6 alkyl or O(C1-C6 alkyl), or esters, ethers, amides, acid halides, anhydrides, carboximidates, nitriles, and salts thereof;
- which first step is followed by a second step comprising a chemo-catalytic oxidation of said intermediates to provide maleic acid or a derivative thereof.
Process for the preparation of maleic acid or a derivative thereof, said process comprising a one-step electrochemical oxidation of a furanic compound into maleic acid, which electrochemical oxidation is carried out in an electrolyte solution comprising a mediator;
- wherein said furanic compound is a compound according to formula I
- wherein R1 is H, CH2OH, CO2H or CHO and R2 is H, OH, C1-C6 alkyl or O(C1-C6 alkyl), or esters, ethers, amides, acid halides, anhydrides, carboximidates, nitriles, and salts thereof;
- which process optionally further comprising a step of reacting the maleic acid to the derivative thereof.
Dependencies are inferred from the claim text.