Claims
- 1. A method of inhibiting the formation of fouling deposits occurring in spent caustic wash systems used for ethylene dichloride manufacturing processes which are in contact with ethylene dichloride processing streams contaminated with oxygen-containing compounds, which deposits are formed in ethylene dichloride processing streams contaminated with oxygen-containing compounds while in contact with a caustic solution having a pH>7, which comprises adding an effective deposit-inhibiting amount of a non-enolizable carbonyl compound to said caustic solution.
- 2. The method of claim 1 wherein the non-enolizable carbonyl compound is selected from the group consisting of formaldehyde, glyoxal, benzaldehyde, p-anisaldehyde, formic acid, glyoxalic acid and paraformaldehyde.
- 3. The method of claim 2 wherein the oxygen-containing compounds are carbonyl compounds.
- 4. The method of claim 3 wherein the carbonyl compound is acetaldehyde.
- 5. The method of claim 3 wherein the non-enolizable carbonyl compound is added to the spent caustic wash system in an amount representing a molar ratio of non-enolizable carbonyl to carbonyl from about 25:1 to about 3:1.
- 6. The method of claim 3 wherein the non-enolizable carbonyl compound is added to the spent caustic wash system in an amount representing a molar ratio of non-enolizable carbonyl to carbonyl from about 10:1 to about 3:1.
- 7. The method of claim 3 wherein the non-enolizable carbonyl compound is added to the spent caustic wash system in an amount representing a molar ratio of non-enolizable carbonyl to carbonyl from about 5:1 to about 3:1.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 08/804,050 filed Feb. 21, 1997, now U.S. Pat. No. 5,770,041, entitled "Non-Enolizable Oxygenates as Antifoulants" by V. Lewis, M. Poindexter and R. McClain.
US Referenced Citations (17)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
804050 |
Feb 1997 |
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