Claims
- 1. An apparatus for use in an ammonium carbamate decomposer and/or a condenser in the synthesis of urea, comprising a nest of stainless steel tubes internally lined with a foil made of unalloyed zirconium which is not welded to said stainless steel tubes, wherein the thickness of said zirconium foil is less than about 0.8 mm.
- 2. The apparatus of claim 1, wherein the thickness of said zirconium foil is between about 0.2 mm and about 0.5 mm.
- 3. The apparatus of claim 1, wherein the outer surface of said zirconium foil intimately contacts the inner surface of said stainless steel tubes.
- 4. The apparatus of claim 3, wherein said intimate contact is achieved by expanding said zirconium foil.
Priority Claims (1)
Number |
Date |
Country |
Kind |
20635 A/84 |
Apr 1984 |
ITX |
|
Parent Case Info
This is a continuation of co-pending application Ser. No. 722,400, filed on Apr. 12, 1985, now abandoned.
US Referenced Citations (6)
Foreign Referenced Citations (5)
Number |
Date |
Country |
1184004 |
Jun 1968 |
GBX |
1292515 |
Mar 1970 |
GBX |
1341497 |
Apr 1971 |
GBX |
1327321 |
Aug 1973 |
GBX |
2087381 |
Aug 1981 |
GBX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
722400 |
Apr 1985 |
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