Synthetic hydrocarbon products

a technology of synthetic hydrocarbons and hydrocarbon products, which is applied in the direction of hydrocarbon oil treatment products, naphtha treatment, thickeners, etc., can solve the problems of uneconomical formation, high final cost of natural gas, and technological challenges in transportation

Inactive Publication Date: 2006-01-26
CONOCOPHILLIPS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0020] The disclosed devices and methods comprise a combination of features and advantages that enable it to overcome the deficiencies of the prior art devices. The various characteristics d

Problems solved by technology

Wells that provide natural gas are often remote from locations with a demand for the consumption of the natural gas.
This transportation presents technological challenges due in part to the large volume occupied by a gas.
However, this contributes to the final cost of the natural gas and is not economical for formations containing small amounts of natural gas.
However, current environmental concerns and regulations discourage or prohibit

Method used

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  • Synthetic hydrocarbon products

Examples

Experimental program
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example 1

[0088] A diesel fraction of straight-run Fischer-Tropsch product was distilled into two cuts, one light cut boiling between 300° F. and 640° F. and a heavy fraction boiling between 640° F. and 1100° F. This straight-run Fischer-Tropsch product was generated by contacting a synthesis gas mixture (with a H2:CO molar ratio of about 2:1) with a cobalt catalyst under typical Fischer-Tropsch reaction conditions (about 430° F. or 221° C.; about 350 psia or 2410 kPa). The straight-run Fischer-Tropsch product was hydrotreated in a hydrotreater comprising a catalytic bed containing about 154 g (200 ml) of a commercial nickel based material (NI-3298 E1 / 16 3F from Engelhard), at a temperature of 375° F. (190° C.), at 390 psia of hydrogen partial pressure in the hydrotreater outlet with a hydrogen flow of 2000 standard cubic feet per barrel of hydrotreater liquid feed (scf / bbl) at a liquid hourly space velocity of 3 hr−1 in trickle flow mode. The heavy hydrocarbon cut obtained after distillation...

example 2

[0089] Using the configuration discussed above, tables II and III below demonstrate the improvement (% or absolute) in the theoretical cloud point relative to 100% straight-run middle distillate as a function of the heavy diesel fraction isomerized and degree of isomerization of that fraction.

TABLE II% ImprovementHeavy DieselDegree of IsomerizationFraction Isomerized0.330.50.850.9576-695° F.8.9%15.4%40.7%48.9%650-695° F.8.9%15.4%39.7%39.7%

[0090]

TABLE IIIAbsolute ImprovementHeavy DieselDegree of IsomerizationFraction Isomerized0.330.50.850.9576-695° F.5.8° F.9.9° F.26.3° F.31.6° F.650-695° F.5.8° F.9.9° F.25.7° F.25.7° F.

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Abstract

The invention includes a process for producing synthetic middle distillates and synthetic middle distillates produced therefrom. In one embodiment, the process comprises fractionating a hydrocarbon synthesis product to at least generate a light middle distillate, a heavy middle distillate, and a waxy fraction; thermally cracking the waxy fraction; and isomerizing the heavy middle distillate. A synthetic diesel or blending component is formed by the combination of at least a portion of the light middle distillate; at least a portion or fraction of the thermally cracked product; and at least a portion or fraction of the isomerized product. In some embodiments, the hydrocarbon synthesis product and/or the thermally cracked product may be hydrotreated. In other embodiments, a synthetic middle distillate comprises at least two fractions: a light fraction with not more than 10% branched hydrocarbons, and a heavy fraction with at least 30% branched hydrocarbons.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This is a continuation-in-part of U.S. application Ser. No. 10 / 886,861 filed Jul. 8, 2004 entitled “Synthetic Hydrocarbon Products,” which is hereby incorporated by reference in its entirety.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not applicable. BACKGROUND OF THE INVENTION [0003] 1. Field of the Invention [0004] This invention relates to the field of hydrocarbon production by Fischer-Tropsch synthesis and more specifically to the field of producing a synthetic middle distillate by thermal cracking Fischer-Tropsch wax and isomerizing a Fischer-Tropsch heavy middle distillate. BACKGROUND OF THE INVENTION [0005] Natural gas, found in deposits in the earth, is an abundant energy resource. For example, natural gas commonly serves as a fuel for heating, cooking, and power generation, among other things. The process of obtaining natural gas from an earth formation typically includes drilling a well into the form...

Claims

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Application Information

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IPC IPC(8): C10L1/00C10L1/08
CPCC10G2/32C10G63/04C10L1/08C10G2400/06C10G2400/04C10G65/00C10G69/00
Inventor ESPINOZA, RAFAEL L.LAWSON, KEITH H.RANGARAJAN, PRIYACNOSSEN, ROBIN G.
Owner CONOCOPHILLIPS CO
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