Granted Patent B2

US 10,179,881 · App. 14/987,522 · Granted Jan 15, 2019

Abstract

Claims (20)

1. A method for isolating a paraffinic hydrocarbon layer from a sludge comprising a mixture of paraffinic hydrocarbons, water, and solids; the method comprising:

(A) providing a paraffinic hydrocarbon isolation composition comprising isopropylamine dodecylbenzene sulfonate, a surfactant, and a solvent, wherein the surfactant comprises two surfactants, wherein one of the surfactants is a zwitterionic surfactant, wherein the zwitterionic surfactant is cocoamidopropyl betaine, wherein the other surfactant is a nonionic surfactant, wherein the nonionic surfactant is polyethylene glycol;

(B) contacting the sludge with the paraffinic hydrocarbon isolation composition; and

(C) allowing the paraffinic hydrocarbon isolation composition to separate the sludge into a three phase separation comprising a paraffinic hydrocarbon layer, a water layer, and a layer of settled solids.

2. The method of claim 1 , further comprising removing the paraffinic hydrocarbon layer from contact with the water layer and the layer of settled solids.

3. The method of claim 1 , wherein the isopropylamine dodecylbenzene sulfonate is present in the paraffinic hydrocarbon isolation composition in an amount between about 63 wt. % to about 65 wt. %.

4. The method of claim 1 , wherein the surfactant is present in the paraffinic hydrocarbon isolation composition in an amount between about 0.01 wt. % to about 1 wt. %.

5. The method of claim 1 , wherein the solvent comprises an aliphatic hydrocarbon, an aromatic hydrocarbon, or any combination thereof.

6. The method of claim 1 , wherein the solvent is present in the paraffinic hydrocarbon isolation composition in an amount between about 30 wt. % to about 35 wt. %.

7. The method of claim 1 , further comprising heating the sludge prior to or concurrently with the contacting the sludge with the paraffinic hydrocarbon isolation composition.

8. The method of claim 1 , wherein the sludge is disposed in a vessel, wherein the volume of sludge is recirculated in the vessel in an amount of about ten times after the contacting the sludge with the paraffinic hydrocarbon isolation composition.

9. The method of claim 1 , wherein the basic sediment and water percentage of the paraffinic hydrocarbon layer is less than 5%, as measured by Basic Sediment and Water Test ASTM D1796-11 el.

10. A paraffinic hydrocarbon isolation composition comprising:

isopropylamine dodecylbenzene sulfonate;

a surfactant, wherein the surfactant comprises two or more surfactants, wherein one surfactant is a zwitterionic surfactant, wherein the zwitterionic surfactant is cocoamidopropyl betaine, wherein the other surfactant is a nonionic surfactant, wherein the nonionic surfactant is polyethylene glycol; and

a solvent.

11. The composition of claim 10 , wherein the isopropylamine dodecylbenzene sulfonate is present in the paraffinic hydrocarbon isolation composition in an amount between about 63 wt. % to about 65 wt. %.

12. The composition of claim 10 , wherein the surfactant is present in the paraffinic hydrocarbon isolation composition in an amount between about 0.01 wt. % to about 1 wt. %.

13. The composition of claim 10 , wherein the solvent comprises an aliphatic hydrocarbon, an aromatic hydrocarbon, or any combination thereof.

14. The composition of claim 10 , wherein the solvent is present in the paraffinic hydrocarbon isolation composition in an amount between about 30 wt. % to about 35 wt. %.

Assignments (10)