Blending of dewaxed biofuels and synthesized paraffinic kerosines with mineral-based kero(JET) distillate cuts to provide on-spec jet fuels

a technology of jet fuel and paraffinic kerosines, which is applied in the direction of biofuels, lubricant compositions, fuels, etc., can solve the problems of decreasing desirable and/or successful approaches, and the difficulty of finding mineral-based additives/blendstocks with the appropriate compositional and physical properties, etc., to improve the other properties of jet-type blends, reduce aromatics, and reduce naphthalenes

Inactive Publication Date: 2015-04-23
EXXON RES & ENG CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0015]SPK and the differential between jet fuel and other refinery products that compete for cracked blendstocks (e.g., gasoline). In addition to smoke point, the blending of SPK may serve to improve other properties of the jet-type blend, such as by enabling JFTOT to be passed at or above ˜260° C., lowering naphthalenes to below ˜3.0 vol %, lowering aromatics to below ˜25 vol %, and / or lowering total sulfur to below ˜0.30 mass %.

Problems solved by technology

However, with treatment methods for existing mineral-based fuels being expensive and / or unable to meet the volume demand, past approaches are becoming decreasingly desirable and / or successful.
Biofuels (renewable fuels) have particularly become a focus for alternative fuels / fuel blends, as finding mineral-based additives / blendstocks with the appropriate compositional and physical properties has also been getting increasingly difficult.

Method used

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  • Blending of dewaxed biofuels and synthesized paraffinic kerosines with mineral-based kero(JET) distillate cuts to provide on-spec jet fuels

Examples

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[0063]The cracked blendstock heavy cat naphtha (HCN) was produced during fluid catalytic cracking and had a boiling-point range falling within ˜50° C. to ˜250° C. A combination of plant-scale and lab-scale tests provided data for the relationship between smoke point and vol % HCN in non-cracked jet-boiling-range distillate shown in FIG. 1, which was based on two sets of data (squares and diamonds) with one outlier excluded (unfilled diamond). This relationship indicated that, for every surplus millimeter of smoke point, approximately 3 vol % of HCN can be added to the non-cracked jet-boiling-range distillate.

[0064]Assuming the refinery runs close to the smoke-point specification of 18 mm for its jet-type blends, it can be unable to capture a benefit. A relationship between smoke point and volume percent hydrotreated vegetable oil (HVO), however, was generated for a jet fuel containing ˜8 vol % HCN using the automated smoke-point measurement procedure. This relationship, shown in FIG...

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Abstract

The present invention describes a method of making a jet fuel composition comprising: blending from about 3 vol % to about 30 vol % of a catalytically and / or thermally cracked blendstock into a non-cracked jet-boiling-range distillate to produce a jet-type blend with a smoke point less than 18 mm; and thereafter, blending from about 2 vol % to about 50 vol % of synthesized paraffinic kerosine (SPK) into the jet-type blend to produce a jet fuel with a smoke point of at least 18 mm.

Description

CROSS-REFERENCE TO RELATE APPLICATIONS[0001]This application is a continuation-in-part of U.S application Ser. No. 14 / 141,618, filed on Dec. 27, 2013, which claims the benefit of U.S. application Ser. No. 61 / 746,835 filed on Dec. 28, 2012, both of which are incorporated by reference herein in its entirety.FIELD OF THE INVENTION[0002]This invention involves fit-for-purpose jet fuel compositions and methods for making them. In particular, mineral-based kerosene type fuels and / or off-spec jet fuels can be made to be on-spec by blending them with a deoxygenated and isomerized biofuel or with a synthesized paraffinic kerosine.BACKGROUND OF THE INVENTION[0003]Rising costs and threats of shortages and supply interruptions have recently highlighted the need for alternative fuel sources to mineral-based fuel products. In addition, availability of mineral-based fuel products having expected or desirable properties and / or product composition has been recently changing as well. In the past, a s...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10L1/08C10L10/02
CPCC10L1/08C10L10/02C10L2200/043C10L2200/0415C10L2270/04C10L2290/24C10L2200/0484C10L1/04Y02E50/10Y02T50/678
Inventor ROCKWELL, GREGORY P.POIRIER, MARC-ANDRE
Owner EXXON RES & ENG CO
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