Producing 2,5-furandicarboxylic acid and treating overhead stream
OwnerJeffrey John Kolstad, Jan Hendrik Blank +1inventors
InventorsJeffrey John Kolstad, Jan Hendrik Blank, Gerardus Johannes Maria Gruter
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Abstract
Process for producing 2,5-furandicarboxylic acid, comprising the steps of: a) oxidizing feed comprising 5-methylfurfural using an oxidizing gas at a temperature in the range of 150 to 210° C. in the presence of a catalyst system comprising cobalt, manganese and bromine to obtain a reaction mixture; b) separating from the reaction mixture obtained in step a) an overhead stream and crude carboxylic acid composition comprising 2,5-furandicarboxylic acid; and c) treating at least part of the overhead stream with base wherein the amount of base is at least of from 0.7 to 3 times, on an equinormal basis, of the amount of bromide in the overhead stream to be treated.
Claims9
A process for producing 2,5-furandicarboxylic acid, comprising the steps of:
- a) oxidizing feed comprising 5-methylfurfural using an oxidizing gas at a temperature in the range of 150 to 210° C. in the presence of a catalyst system comprising cobalt, manganese and bromine to obtain a reaction mixture;
- b) separating from the reaction mixture obtained in step a) an overhead stream and crude carboxylic acid composition comprising 2,5-furandicarboxylic acid;
- and
- c) treating at least part of the overhead stream with base wherein the amount of base is at least of from 0.7 to 3 times, on an equinormal basis, of the amount of bromide in the overhead stream to be treated which amount of bromide is determined by potentiometric titration with silver nitrate solution.
Dependencies are inferred from the claim text.