IP Library › Granted Patent US 7,951,759
Granted Patent B2
US 7,951,759 · App. 12/345,198 · Granted May 31, 2011

Fischer-Tropsch wax composition and method of transport

Assignee: Chevron U.S.A. Inc.
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Quick Facts
Patent No.
US 7,951,759
App. No.
12/345,198
Granted
May 31, 2011
Kind
B2
Abstract

The present invention relates to transportable product for the transportation of paraffinic wax and methods of transporting using this transportable product. The transportable product comprises 90 to 20 weight % of a liquid comprising >50 weight % alcohol and having a true vapor pressure of ≦14.7 psia when measured at 20° C., and 10 to 80 weight % of wax particles, wherein the wax particles comprise ≧75 weight % of wax particles larger than 0.1 mm. The transportable product and methods of transporting according to the present invention are able to accommodate a relatively high weight % of paraffinic wax particles in the transportable product while avoiding interparticle adhesion and clumping by ensuring that the wax particles are not too small and the amount of small wax particles is not excessive.

Claims (22)

1. A transportable product comprising:

a) 70 to 20 weight % of a liquid comprising >50 weight % alcohol and water, and having a true vapor pressure of ≦14.7 psia when measured at 20° C.; and

b) 30 to 80 weight % of wax particles, wherein the wax particles comprise ≧75 weight % of wax particles larger than 0.1 mm.

2. The product of claim 1 , wherein the wax particles are selected from the group consisting of Fischer-Tropsch derived wax particles, petroleum derived wax particles, and combinations thereof.

3. The product of claim 1 , wherein the wax particles are Fischer-Tropsch derived wax particles.

4. The product of claim 1 , wherein the transportable product has a passing stability rating when measured at 20° C. for 5 weeks.

5. The product of claim 1 , wherein the liquid has a true vapor pressure of ≦9 psia when measured at 20° C.

6. The product of claim 1 , wherein at least a portion of the liquid is derived from a Fischer-Tropsch process.

7. The product of claim 1 , wherein the alcohol is selected from the group consisting of methanol, ethanol, propanol, iso-propanol, butanol, t-butanol, and mixtures thereof.

8. The product of claim 7 , wherein the alcohol is methanol.

9. The product of claim 8 , wherein the liquid is a homogenous mixture of alcohol and water.

10. The product of claim 8 , wherein the liquid comprises ≧90 weight % alcohol and ≦10 weight % water.

11. The product of claim 10 , wherein the methanol is derived from a methanol synthesis process.

12. The product of claim 1 , wherein the liquid further comprises a hydrocarbonaceous liquid selected from the group consisting of naphtha, heavy oil, distillate, lubricant base oil, and mixtures thereof.

13. The product of claim 1 , wherein the liquid further comprises a naphtha selected from the group consisting of petroleum derived naphtha, Fischer-Tropsch derived naphtha, and mixtures thereof.

14. The product of claim 1 , wherein the liquid comprises ≧95 weight % alcohol.

15. The product of claim 1 , wherein the liquid comprises ≧95 weight % methanol.

16. The product of claim 1 , wherein the liquid has a true vapor pressure of ≦9 psia when measured at 20° C.

17. The product of claim 1 , wherein the wax particles are smaller than 50 mm.

18. The product of claim 17 , wherein the wax particles comprise ≧90 weight % of wax particles larger than 0.1 mm.

19. The product of claim 17 , wherein the wax particles comprise ≧90 weight % of wax particles larger than 2.8 mm.

20. The product of claim 1 , wherein the wax particles are in the form of spheres, semi-spheres, flat disks, doughnuts, cylindrical extrudates, multilobe extrudates, and mixtures thereof.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 2, 2021
From: CHEVRON U.S.A. INC.
To: SASOL TECHNOLOGY (PTY) LTD.
Reel/Frame 056741/0546 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 24, 2009
From: DIECKMANN, GUNTHER H.; BUETZOW, MARK R.; O'REAR, DENNIS J.
To: CHEVRON U.S.A. INC.
Reel/Frame 022445/0333 →
Continuity (2)
Division 10950662 · Sep 28, 2004
Related Publication 20090173662A1 · Jul 9, 2009