US 9,428,480 B2 · Oxidation process to produce a crude and/or purified carboxylic acid product

Abstract

Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.

Claims11

Dependent claims

A carboxylic acid composition comprising furan-2,5-dicarboxylic acid solids, said solids comprising:

(a) furan-2,5-dicarboxylic acid in an amount greater than 90 weight percent;
(b) a b* value of less than 15;
(c) 5-formyl furan-2-carboxylic acid (FFCA) in a range of from about 0.1 to about 4.0 weight percent;
and
(d) 5-(ethyoxycarbonyl)furan-2-carboxylic acid (EFCA) in an amount from 0.1 to 4 wt %.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/495,785Filed 24 Sep 2014 · continuation

Priority

24 May 2011

Published

US 2015/0011783 A18 Jan 2015

Granted

30 Aug 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification2 codes

C07D 307/68
With hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals,…:…
C07D
Heterocyclic compounds

Family

Application61/489,488Us provisional application · filed 24 May 2011

Application13/228,797Parent of this continuation · filed 9 Sep 2011

US 2015/0011783 A1Pre-grant publication · published 8 Jan 2015

US 2012/0302768 A1Published application

US 9,428,480 B2This patent

From the US filing history. Foreign family members aren’t listed.

Oxidation process to produce a crude and/or purified carboxylic acid product

Life of this patent

Oxidation process to produce a crude and/or purified carboxylic acid product

Life of this patent

Abstract

Claims11