Process for inhibiting fouling in hydrocarbon processing
View Patent ↗A method for inhibiting the formation of fouling materials including contacting hydrocarbon media containing aldehyde compounds with an antifoulant while treating the hydrocarbon media with a basic wash. The antifoulant includes a reducing sugar.
1. A method for inhibiting the formation of fouling materials comprising contacting hydrocarbon media containing aldehyde compounds with an antifoulant while treating the hydrocarbon media with a basic wash, wherein said antifoulant comprises a reducing sugar such that the molar equivalent of reducing sugar with respect to the aldehyde compound is 0.2 to 5.0.
2. The method of claim 1 wherein the reducing sugar is a saccharide containing an aldehyde group and having an anomeric carbon in an open chain configuration.
3. The method of claim 2 , wherein the reducing sugar is an aldose saccharide.
4. The method of claim 1 wherein the reducing sugar is selected from the group consisting of glucose, glucosamine, acetyl glucosamine, fructose, galactose, lactose, mannose, maltose, ribose, xylose, lyxose, rhamnose, cellobiose and arabinose and blends thereof.
5. The method of claim 4 , wherein the reducing sugar is a blend of glucose and fructose.
6. The method of claim 1 , wherein the reducing sugar is derived from hydrolysis of a saccharide.
7. The method of claim 1 wherein a molar excess of the antifoulant contacts the hydrocarbon media.
8. The method of claim 1 wherein the antifoulant is added in a mole ratio of the antifoulant to aldehyde compounds in an amount of from about 0.1:1 to about 10:1.
9. The method of claim 8 wherein the antifoulant is added in a mole ratio of the antifoulant to aldehyde compounds in an amount of from about 0.4:1 to about 5:1.
10. The method of claim 1 wherein the antifoulant is in an aqueous solution.
11. The method of claim 1 wherein the antifoulant is added to the hydrocarbon media simultaneously with the basic wash.
12. The method of claim 1 wherein the antifoulant is added to the basic wash before contacting the hydrocarbon media.
13. The method of claim 1 wherein the hydrocarbon media is a cracked hydrocarbon stream from the pyrolysis of hydrocarbons.
14. The method of claim 13 wherein the cracked hydrocarbon stream is from the pyrolysis of ethane, propane, butane, naphtha or mixtures thereof.
15. The method of claim 1 wherein the basic wash has a. pH greater than 7.0 and comprises sodium hydroxide, potassium hydroxide or alkanolamines.
16. The method of claim 1 further comprising the addition of an additive.
17. The method of claim 16 wherein the additive is added in an amount of from about 10 ppm to about 10,000 ppm.
18. The method of claim 17 wherein the additive is added in an amount of from about 100 ppm to about 1000 ppm.
19. The method of claim 16 wherein the additive is a dispersant.
20. The method of claim 19 wherein the dispersant is naphthalene sulfonate.