IP Library Granted Patent US 8,241,491
Granted Patent B1
US 8,241,491 · App. 13/251,224 · Granted Aug 14, 2012

Method of removing arsenic from hydrocarbons

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Quick Facts
Patent No.
US 8,241,491
App. No.
13/251,224
Granted
Aug 14, 2012
Kind
B1
Abstract

Improved methods for removing arsenic from starting liquid hydrocarbons are provided which comprise contacting the hydrocarbons with a composition containing a triazine component and a glycol ether component, allowing the composition to react with the arsenic to create a treated hydrocarbon fraction and an arsenic-rich fraction, and separating the treated fraction from the arsenic-rich fraction. Preferably, the treating composition also includes an alcohol, and is used at a level of from about 1-10,000 ppm.

Claims (26)

1. A method of removing arsenic from a starting liquid hydrocarbon containing arsenic and up to about 5% by volume water, comprising the steps of contacting said starting liquid hydrocarbon with an effective amount of a composition comprising from about 25-80% by volume of a triazine and from about 15-50% by volume of a glycol ether, allowing said composition to sequester at least a portion of said arsenic in said starting liquid hydrocarbon, resulting in a treated liquid hydrocarbon fraction having a reduced arsenic content, and an arsenic-rich fraction, and separating said treated liquid hydrocarbon fraction from said arsenic-rich fraction, said composition being used at a level of from about 1-10,000 ppm, based upon the volume of said starting liquid hydrocarbon.

2. The method of claim 1 , said water content being up to about 1% by volume.

3. The method of claim 1 , including the step of adding said composition to said starting liquid hydrocarbon to form a mixture, agitating said mixture for a period of time, and allowing the agitated mixture to settle and thereby form said treated liquid hydrocarbon fraction and said arsenic-rich fraction.

4. The method of claim 3 , including the step of agitating said mixture for a period of from about 0.5-12 hours.

5. The method of claim 3 , including the step of allowing said agitated mixture to settle for a period of from about 0.5-12 hours.

6. The method of claim 1 , said level being from about 1,500-8,000 ppm.

7. The method of claim 6 , said level being from about 4,000-6,000 ppm.

8. The method of claim 1 , said triazine level being from about 40-60% by volume.

9. The method of claim 1 , said glycol ether level being from about 20-40% by volume.

10. The method of claim 1 , said composition including a quantity of alcohol.

11. The method of claim 10 , said alcohol being present at a level of from about 5-40% by volume.

12. The method of claim 11 , said level being from about 15-30% by volume.

13. The method of claim 10 , said alcohol being a lower alcohol.

14. The method of claim 13 , said lower alcohol selected from the group consisting of C1-C6 alkyl alcohols and mixtures thereof.

15. The method of claim 14 , said alcohol comprising methanol.

16. The method of claim 1 , said triazine having the structural formula

where three of the X members of the ring are nitrogen and the remaining X members of the ring are carbon, each R substituent bound to a nitrogen member being independently selected from the group consisting of nothing, H, C1-C20 straight or branched chain alkyl, alkenyl, and alkynyl groups, and hydroxyl derivatives of such groups, and each R substituent bound to a carbon member is independently selected to the group consisting of H, C1-C20 straight or branched chain alkyl, alkenyl, and alkynyl groups, and hydroxyl derivatives of such groups.

17. The method of claim 16 , each of the R substituents bound to a nitrogen is nothing, and each of the R substituents bound to a carbon is H.

18. The method of claim 1 , said glycol ether being selected from the group consisting of glycol mono-, di-, and tri-alkylene ethers, glycol aryl ethers, and derivatives thereof.

19. The method of claim 18 , said glycol ether selected from the group consisting of glycol C2-C6 monoalkylene ethers.

20. The method of claim 18 , said glycol ether selected from the group consisting of glycol butyl ether, ethoxylated glycol butyl ether, and mixtures thereof.

21. The method of claim 1 , said composition having a maximum water content of up to about 10% by volume.

22. The method of claim 1 , said composition having a pH of from about 6-13.

23. The method of claim 22 , said pH being from about 9-12.

24. The method of claim 1 , including a mixture of triazines.

25. The method of claim 1 , including a mixture of glycol ethers.

Assignments (5)
SECURITY INTEREST Recorded Jan 30, 2015
From: CANADIAN ENERGY SERVICES L.P.
To: THE BANK OF NOVA SCOTIA
Reel/Frame 034857/0635 →
RELEASE OF SECURITY INTEREST Recorded Jan 20, 2015
From: HSBC BANK CANADA
To: CANADIAN ENERGY SERVICES L.P.
Reel/Frame 034755/0333 →
SECURITY AGREEMENT Recorded Apr 24, 2013
From: CANADIAN ENERGY SERVICES L.P.
To: HSBC BANK CANADA
Reel/Frame 030292/0196 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 21, 2013
From: JACAM CHEMICAL COMPANY, INC.; JACAM CHEMICAL COMPANY, LLC; JACAM CHEMICALS, LLC; JACAM MANUFACTURING, LLC
To: CANADIAN ENERGY SERVICES LP
Reel/Frame 030057/0036 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 1, 2011
From: ZAID, GENE H.; WOLF, BETH ANN
To: JACHEM CHEMICALS, LLC
Reel/Frame 027003/0307 →