Supercritical Fluid Separation for Selective Quaternary Ammonium Salt Promoted Esterification of Terephthalic Acid

Autor:	Charles A. Eckert, Jeffrey Scott Hurley, Barry L. West, David R. Lamb, and Charles L. Liotta, Heather P. Lesutis, James S. Brown, David A. Schiraldi, Karen Chandler, David Bush
Rok vydání:	1999
Předmět:	Terephthalic acid Ethylene Ethylene oxide General Chemical Engineering Supercritical fluid extraction General Chemistry Reaction intermediate Industrial and Manufacturing Engineering Supercritical fluid Catalysis chemistry.chemical_compound chemistry Organic chemistry Ethylene glycol
Zdroj:	Industrial & Engineering Chemistry Research. 38:3622-3627
ISSN:	1520-5045 0888-5885
DOI:	10.1021/ie990040f
Popis:	We report the selective removal of a desired reaction intermediate with a supercritical fluid in a new synthesis route to poly(ethylene terephthalate), avoiding ethylene glycol. We have successfully catalyzed the esterification of terephthalic acid with ethylene oxide in a supercritical fluid with a series of quaternary ammonium salts to form mono(2-hydroxyethyl terephthalate). This desired monoester was removed from the involatile bed of terephthalic acid and catalyst by continuous extraction with supercritical fluid before subsequent reaction to the diester could take place.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ce40c5206f1336d96a84a1c8fca19eef https://doi.org/10.1021/ie990040f Zobrazit plný text záznamu