Method for producing purified dialkyl-furan-2,5-dicarboxylate

Patent metadata

Field	Value
Publication number	US-10696645-B2
Application number	US-201815875352-A
Country	US
Kind code	B2
Filing date	Jan 19, 2018
Priority date	Jul 20, 2017
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

Disclosed is a purified dialkyl furan dicarboxylate (DAFD) vapor composition containing at least 99.5 wt. % DAFD; 5-(alkoxycarbonyl) furan-2-carboxylic acid (ACFC) that, if present, is present in an amount of not more than 1000 ppm, alkyl-5-formylfuran-2-carboxylate (AFFC) that, if present, is present in an amount of not more than 1000 ppm, 5-(dialkoxymethyl)furan-2-carboxylic acid (DAFCA) that if present, is present in an amount of not more than 1000 ppm, and alkyl 5-(dialkoxymethyl)furan-2-carboxylate (ADAFC) that if present, is present in an amount of not more than 1000 ppm, in each case based on the weight of the DAFD vapor composition.

First claim

What I claim is:

1. A dialkyl-furan-2,5-dicarboxylate (DAFD) composition comprising solid particles of DAFD, wherein said composition comprises:
(i) at least 99.5 wt. % of DAFD;
(ii) 5-(alkoxycarbonyl)furan-2-carboxylic acid (ACFC) that if present, is present in an amount of not more than 1000 ppm, and
(iii) alkyl-5-formylfuran-2-carboxylate (AFFC) that if present, is present in an amount of not more than 1000 ppm,
wherein
(iv) 5-(dialkoxymethyl)furan-2-carboxylic acid (DAFCA) is present in an amount of not more than 1000 ppm, and
(v) alkyl 5-(dialkoxymethyl)furan-2-carboxylate (ADAFC) is present in an amount of not more than 1000 ppm, and
wherein the composition contains not more than 0.5 wt. % of water.

2. The DAFD composition of claim 1 , wherein said composition comprises:
(i) not more than 100 ppm of ACFC,
(ii) not more than 100 ppm of AFFC,
(iii) not more than 10 ppm of furan dicarboxylic acid (FDCA),
(iv) not more than 100 ppm of DAFCA, and
(v) not more than 100 ppm of ADAFC.

3. A dimethyl furan-2,5-dicarboxylate (DMFD) composition comprising solid particles of DMFD, wherein said composition comprises:
(i) at least 99.5 wt. % of DMFD;
(ii) 5-(methoxycarbonyl)furan-2-carboxylic acid (MCFC) that if present, is present in an amount of not more than 1000 ppm, and
(iii) methyl-5-formylfuran-2-carboxylate (MFFC) that if present, is present in an amount of not more than 1000 ppm,
wherein
(iv) 5-(dimethoxymethyl)furan-2-carboxylic acid (DMFCA) is present in an amount of not more than 1000 ppm, and
(v) methyl 5-(dimethoxymethyl)furan-2-carboxylate (MDMFC) is present in an amount of not more than 1000 ppm, and
wherein the composition contains not more than 0.5 wt. % water.

4. The composition of claim 1 , which contains less than 1000 ppm of furan dicarboxylic acid.

5. The composition of claim 3 , which contains less than 1000 ppm of furan dicarboxylic acid.

Assignees

• Eastman Chem Co

Inventors

• Janka Mesfin Ejerssa

Classifications

• C07B63/02

  by treatment giving rise to a chemical modification · CPC title

• B01D3/002

  by continuous methods · CPC title

• B01D3/065

  Multiple-effect flash distillation (more than two traps) · CPC title

• B01D3/143

  by two or more of a fractionation, separation or rectification step · CPC title

• C07D307/68 Primary

  Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen · CPC title