21-03-2013 дата публикации
Номер: US20130068996A1
Disclosed herein is a process for purifying aryl carboxylic acids, in particular terephthalic acid, wherein the impure acid is dissolved or dispersed in an ionic liquid and a non-solvent is added to precipitate the purified acid. The present disclosure further relates to compositions comprising terephthalic acid and one or more ionic liquids. 1138-. (canceled)139. A composition comprising one or more aryl carboxylic acids and one or more ionic liquids , wherein the ionic liquids comprise:a) a cation formed from an alkylated heterocyclic or heteroaryl unit chosen from imidazole, pyrazole, thiazole, isothiazole, azathiozole, oxothiazole, oxazine, oxazoline, oxazaborole, dithiozole, triazole, selenozole, oxahosphole, pyrrole, borole, furan, thiophene, phosphole, pentazole, indole, indoline, oxazole, isothirazole, tetrazole, benzofuran, dibenzofuran, benzothiophene, dibenzothoiphene, thiadiazole, pyrdine, pyrimidine, pyrazine, pyridazine, piperazine, piperidine, morpholine, pyran, annoline, phthalazine, quinazoline, and quinoxaline; and [{'sup': −', '−', '−', '−, 'i) F, Cl, Br, and I;'}, {'sub': 4', '6', '6', '6, 'sup': −', '−', '−', '−', '−', '−', '−', '−', '−, 'ii) BX; PX; AsX; and SbX; wherein X is a halogen chosen from F, Cl, Br, and I;'}, {'sub': '2', 'sup': '−', 'iii) NO;'}, {'sub': '3', 'sup': '−', 'iv) NO;'}, {'sub': '4', 'sup': '2−', 'v) SO;'}, {'sub': 3', '3, 'sup': '−', 'vi) (CF)SO;'}, {'sup': 10', '−, 'sub': '4', 'vii) substituted or unsubstituted B(R);'}, {'sup': 10', '−, 'sub': '2', 'viii) substituted or unsubstituted (RO)S(═O)O;'}, {'sup': 10', '−, 'sub': '2', 'ix) substituted or unsubstituted (RO)PO;'}, {'sup': 10', '−, 'sub': '2', 'x) substituted or unsubstituted RCO;'}, {'sup': 10', '−, 'sub': '2', 'xi) substituted or unsubstituted (RO)P(═O)O;'}, {'sup': 10', '−, 'xii) substituted or unsubstituted (RO)C(═O)O;'}, 'xiii) substituted of unsubstituted azolate;', {'sup': '10', 'Ris independently hydrogen; substituted or unsubstituted linear; branched, and ...
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