Claims
- 1. A process for depressing corrosion of a metal material of a reactor while producing 1,1,1,3,3-pentafluoropropane, wherein said process comprises:
a liquid-phase reaction step for fluorination of 1,1,1,3,3-pentahalopropane with HF, wherein at least one of the halogen atoms in said 1,1,1,3,3-pentahalopropane is not F, wherein said 1,1,1,3,3-pentahalopropane is fluorinated in the presence of antimony pentahalide as a catalyst in said reactor to obtain a reaction mixture comprising at least 1,1,1,3,3-pentafluoropropane and antimony pentahalide as the catalyst, wherein the fluorination is conducted at a reaction temperature at less than 50° C. while HF exists in a reaction system in an amount of at least 5 times by mole as large as an amount of said antimony pentahalide; and depressing corrosion of the metal material of said reactor.
- 2. The process for depressing corrosion of a metal material of a reactor of claim 1, wherein said metal material comprises a nickel-chromium-molybdenum-tungsten alloy.
- 3. The process for depressing corrosion of a metal material of a reactor of claim 1, wherein said metal material is a Ni-based material which has corrosion resistance.
- 4. The process for depressing corrosion of a metal material of a reactor of claim 1, wherein said metal material comprises 20.0-22.5 of Cr, 12.5-14.5 of Mo, 2.5-3.5 of W, 2.0-6.0 of Fe, ≦0.010 of C, ≦0.50 of Mn, ≦0.08 of Si, ≦0.35 of V, ≦0.02 of P, ≦0.02 of S, and the balance being Ni.
Priority Claims (1)
Number |
Date |
Country |
Kind |
11-323971 |
Nov 1999 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a Rule 1.53(b) divisional of application Ser. No. 10/130,116, filed on May 15, 2002, which is the National Phase under 35 U.S.C. § 371 of PCT International Application No. PCT/JP00/08002, which has an International filing date of Nov. 14, 2000, and which designated the U.S. PCT/JP00/08002 claims priority on Japanese Application No. 11-323971 filed on Nov. 15, 1999. The contents of each of these applications is hereby incorporated by reference.
Divisions (1)
|
Number |
Date |
Country |
Parent |
10130116 |
May 2002 |
US |
Child |
10775167 |
Feb 2004 |
US |