(19)
(11) EP 1 403 272 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 158(3) EPC

(48) Corrigendum issued on:
16.06.2004 Bulletin 2004/25

(43) Date of publication:
31.03.2004 Bulletin 2004/14

(21) Application number: 02724648.7

(22) Date of filing: 25.04.2002
(51) International Patent Classification (IPC)7: C07F 9/12
(86) International application number:
PCT/JP2002/004189
(87) International publication number:
WO 2002/100868 (19.12.2002 Gazette 2002/51)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

(30) Priority: 08.06.2001 JP 2001174313
11.09.2001 JP 2001275331

(71) Applicant: DAIHACHI CHEMICAL INDUSTRY CO., LTD.
Osaka-shi, Osaka 541-0046 (JP)

(72) Inventor:
  • TAMURA, Kazunari
    Handa-shi, Aichi 475-0833 (JP)

(74) Representative: Zanoli, Enrico et al
Zanoli & Giavarini S.r.l., Viale Bianca Maria, 35
20122 Milano
20122 Milano (IT)

   


(54) PROCESS FOR PREPARATION OF PHOSPHORIC ESTERS


(57) A process for preparing a phosphoric ester, comprising: Step (1) of reacting naphthol with phosphorus oxychloride in a molar ratio of 1:1.3 or more in the presence of a metallic halide and removing unreacted phosphorus oxychloride and Step (2) of reacting the reaction product of Step (1) with phenol in a molar ratio (molar ratio of chlorine contained in the reaction product to phenol) of 1:1-1.5 and removing hydrogen chloride produced as a by-product to thereby obtain a phosphoric ester represented by the general formula (I): wherein n is 1 or 2.