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Patent

Hydrocarbon fuel additive

TLDR
In this article, a solution of a halogenated hydrocarbon when added in amounts of from about 1 to 2 parts per thousand by volume to hydrocarbon fuels improves combustion and increases fuel efficiency.
Abstract
A solution of a halogenated hydrocarbon when added in amounts of from about 1 to 2 parts per thousand by volume to hydrocarbon fuels improves combustion and increases fuel efficiency. The presence of a small amount of a hydroperoxide in combination with the halogenated hydrocarbon improves the starting characteristics of diesel fuel and further improves combustion efficiency.

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Citations
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Patent

Cleaner burning and cetane enhancing diesel fuel supplements

TL;DR: In this article, the authors proposed to add 0.05 to 0.5 % by weight of an alkyl or dialkyl peroxide compound having one to 12 carbon atoms in the alkyls group.
Patent

Low-sulfur diesel fuels containing organometallic complexes

TL;DR: In this paper, a low-sulfur diesel fuel with an organometallic complex was used to lower the ignition temperature of exhaust particles collected in the trap. But, this was only for diesel engines equipped with exhaust system particulate traps.
Patent

Hydrocarbon oil-aqueous fuel and additive compositions

TL;DR: In this paper, processes and additive compositions capable of stabilizing asphaltenes flocculated and precipitated in a petroleum product (as a crude oil, a residue or a fuel oil), rendering thus possible its blending with other petroleum products or its processing or its combustion, reducing fouling in petroleum apparatuses, achieving yield increase in petroleum refining and/or petrochemical operations, and reducing particulate and or SOx emissions during combustion of fuels.
Patent

Organometallic complex-antioxidant combinations, and concentrates and diesel fuels containing same

TL;DR: In this article, a combination of organometallic complexes and antioxidants is used to lower the ignition temperature of exhaust particles collected in the trap. But this combination is not suitable for diesel engines.
Patent

Additive for improving performance of liquid hydrocarbon fuels

TL;DR: In this paper, an additive to hydrocarbon fuels such as gasoline, diesel fuel and the like used in vehicles and furnaces is described, which comprises a mixutre of a low molecular weight alcohol, an aliphatic ester, an aromatic hydrocarbon, a halogenated alkene, a hydroxy unsaturated vegetable oil and an alophatic hydrocarbon.
References
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Stabilization of gasoline and the like

TL;DR: In this paper, the authors proposed a method to prevent color formation and gum forming substances in gasoline, and also to prevent the reduction in antiknock properties of said gasoline on storage.