A process for the manufacture of a perfluorooxycarboxylate of formula (I): R
f
O—CF
2
CF
2
—O—CF
2
—COOX
a
(I), wherein R
f
is a perfluoro(oxy)alkyl group, and X
a
is H, a monovalent metal or an ammonium group of formula NR
N
4
, with R
N
, equal or different at each occurrence, being H or a C
1-6
hydrocarbon group, said process comprising: (A) reacting a perfluorovinylether of formula R
f
—O—CF═CF
2
with an ethylene glycol derivative selected among ethylene glycol (HO—CH
2
CH
2
—OH), glycolic acid (HO—CH
2
—COOH), glycolaldehyde (HO—CH
2
—CHO) and protected derivatives thereof, so as to yield the corresponding addition product of formula R
f
—O—CFH—CF
2
—O—CH
2
-E, and E being selected among —CH
2
OH, —COOH and —CHO; (B) optionally protecting functional group E with suitable chemistry; (C) fluorinating the (protected) addition product to yield the corresponding perfluorinated addition product; (D) optionally deprotecting the perfluorinated addition product to yield corresponding acyl fluoride of formula R
f
—O—CF
2
—CF
2
—O—CF
2
—C(O)F; and (E) hydrolyzing and, optionally, neutralizing, the acyl fluoride for yielding the perfluorooxycarboxylate of formula (I).
[EN] PROCESS FOR THE MANUFACTURE OF FLUOROSURFACTANTS<br/>[FR] PROCÉDÉ DE FABRICATION DE TENSIOACTIFS FLUORÉS
申请人:SOLVAY SOLEXIS SPA
公开号:WO2010003931A1
公开(公告)日:2010-01-14
This invention pertains to a novel process for the manufacture of a perfluorooxycarboxylate of formula (I): RfO-CF2CF2-O-CF2-COOXa (I) wherein Rf is a perfluoro(oxy)alkyl group, and Xa is H, a monovalent metal or an ammonium group of formula NRN4, with RN, equal or different at each occurrence, being H or a C1-6 hydrocarbon group, said process comprising: (A) reacting a perfluorovinylether of formula Rf-O-CF=CF2 with an ethylene glycol derivative selected among ethylene glycol (HO-CH2CH2-OH), glycolic acid (HO-CH2-COOH), glycolaldheyde (HO-CH2-CHO) and protected derivatives thereof, so as to yield the corresponding addition product of formula Rf-O-CFH-CF2-O-CH2-E, with Rf having the same meaning as above detailed, and E being selected among -CH2OH, -COOH and -CHO; (B) optionally protecting functional group E with suitable chemistry; (C) fluorinating said (protected) addition product to yield the corresponding perfluorinated addition product; (D) optionally deprotecting said perfluorinated addition product to yield corresponding acyl fluoride of formula Rf-O-CF2-CF2-O-CF2-C(O)F; (E) hydrolyzing and, optionally, neutralizing, said acyl fluoride for yielding the perfluorooxycarboxylate of formula (I).