Claims
- 1. A process for preparing colorless alkanolamines and/or alkylenediamines which comprises thermally reacting ammonia or a reactive amine and an alkylene oxide or alkanolamine in a reactor in which the corrosion-sensitive parts of the reactor are made of substantially nickel-free stainless steel.
- 2. The process of claim 1, wherein a corrosion-resistant ferritic steel containing less than 0.5% of nickel and/or less than 0.025% carbon is used.
- 3. The process of claim 1, wherein a substantially nickel-free material is used at specific points, especially at points which normally suffer corrosion.
- 4. The process of claim 1, wherein the alkylene oxide used is ethylene oxide or propylene oxide.
- 5. A process for separating by distillation the reaction products of a reaction mixture containing ammonia or a reactive amine and an alkylene oxide or alkanolamine which comprises heating the mixture in an apparatus in which the corrosion-sensitive parts are made of substantially nickel-free stainless steel.
- 6. The process of claim 5 wherein the corrosion-sensitive parts are made of a corrosion-resistant ferritic steel containing less than 0.5% of nickel and/or less than 0.025% carbon.
- 7. The process of claim 5 wherein the corrosion-sensitive parts are made of a substantially nickel-free material.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3010105 |
Mar 1980 |
DEX |
|
Parent Case Info
This application is a continuation of application Ser. No. 381,721, filed on May 24, 1982, which was a divisional of application Ser. No. 242,258 filed Mar. 10, 1981.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3459671 |
Marklow et al. |
Aug 1969 |
|
4036881 |
Brennan et al. |
Jul 1977 |
|
4059440 |
Takemura et al. |
Nov 1977 |
|
4078003 |
Feichtinger et al. |
Mar 1978 |
|
Non-Patent Literature Citations (1)
Entry |
Rothenberg, "Specialty Steels", Noyes Data Co., Parkridge, N.J., pp. 137-138, 1977. |
Divisions (1)
|
Number |
Date |
Country |
Parent |
242258 |
Mar 1981 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
381721 |
May 1982 |
|