DE505928C - Process for making an engine fuel - Google Patents

Description

The invention relates to innovations in motor fuels and, more particularly, to manufacture a fuel for internal combustion engines, which at increased pressure without Knock phenomenon can be used.

Many theories have been proposed to explain the phenomenon of knocking, and you already have many anti-knock agents, for example tetraethyl lead, etc., suggested. One has also tried the effects of these anti-knock agents through numerous Explain theories, but scientists and technologists have not yet been able to agree on this. How obvious

! 5 these may be, so it has been up to now not possible to have any particular proof in favor of one theory or another to teach. So there is as yet no means of predicting which substances will be

how anti-knock agents work and which ones don't; much more each individual substance must be carefully examined and assessed for itself.

It has been found that to suppress knocking the introduction of non-metallic organic free radicals in the combustion chamber is particularly effective.

However, the free radicals are not always available as an additive to fuel hydrocarbons largely suitable, although there is no difficulty in handling them for research purposes. They are often uncomfortable constantly and usually easily oxidize in air to form the poorly soluble ones Moloxides or other oxygen-containing products.

It has been found, however, that it is not necessary to use free radicals as such to use. The knocking can be just as effective by introducing it into the fuel (or in the combustion chamber directly) are suppressed by substances, which are capable of generating the necessary free radicals at elevated temperature.

The invention therefore comprises the means for preventing knocking in internal combustion engines (and therefore means which such machines enable them to operate under higher pressure than with ordinary fuel work) by introducing organic free radicals into the fuel or into the combustion chamber or of non-metallic organic compounds that are in the combustion chamber such organic are able to form free radicals. The invention further encompasses an improved motor fuel such contains organic free radicals or substances in the combustion chamber are able to generate organic free radicals.

Among these substances which can be used according to the invention are including: triaryl methyls and substances

zen which generate triaryl methyls (for example hexaarylethanes, pentaarylethanes, Triarylmethylhydroquinone ether, triarylmethyldiarylamine, arylazotriarylmethane, tetraarylhydrazine, Dialkyltetrahydrodipyridyl), tetrazene derivatives, the at least one Contain aryl group, diarylnitrosamines, fluorenyl compounds (such as diphenyl bisdiphenylene ethane, Dianisyl-bis-diphenyleneethane) and triarylnitrosomethane.

Example ι

The addition of 0.18 weight percent triphenylmethyl to gasoline increased the highest useful compression factor from 5.0 to 5.15. The required amount of aniline for Production of the same effect was 1.2 weight percent.

B e i s ρ i e 1 2

The addition of 0.5 weight percent triphenylmethyldiphenylamine, which undergoes dissociation into the free radicals, triphenylmethyl and diphenyl nitrogen, on heating, to an engine fuel consisting essentially of gasoline, increased the highest useful compression factor from 5.0 to 5.4. The amount of aniline to obtain the same effect is 5.7 ° / _0th

If more than 0.2% triphenylmethyldiphenylamine is used in gasoline, so it is advisable to add a sufficient amount of benzene for easier solubilization.

Ό · · ι

Example 3

The addition of 0.5 ° / ptolylamin _{Triphenylmethyldi-0,} which by heat in the free radicals, triphenylmethyl and di-p-tolylstickstoff, undergoes decomposition to gasoline increased to the highest useful compression factor of 5.0 to 5.07 or 1 , 4 ° / ". The amount of aniline to produce the same effect is 1 ° / _0th

Example 4

The addition of hydroquinone bis-triphenylmethyl ether, which dissociates on heating to give the free radicals, triphenylmethyl and quinone, to a fuel composed of a mixture of gasoline and benzene increased the highest useful compression factor of 5.5 to 5.64. The amount of the aniline to produce the same effect is 1.8 ° / _0th

Example 5

The addition of 0.5 per _cent of tetraphenylhydrazine, which dissociates into the free radical, diphenyl nitrogen, on heating, to a fuel composed of gasoline and benzene to completely dissolve, increased the highest useful compression factor from 5.5 to 5.59 . The amount of required to produce the same effect aniline is 1.1 ° / _0th

Example 6

The addition of 1 ° / ₀ of tetra-p-tolylhydrazine, which dissociated on heating, and the free radical, di-p-tolylstickstoff yields to gasoline increased the useful compression factor of 5.0 to 5.07, an increase, caused by the same amount of aniline.

Example 7

The addition of 0.5 ° / ₀ diphenylnitrosamine which dissociates when heated to about 130 ^0, and the free radical Diphenylstickstoff and nitric oxide results to an engine fuel composed of gasoline substantially increased the highest useful compression factor of 5 , 0 to 5.08. The amount of aniline necessary to produce the same effect is 1.2 ⁰ I ₀ .

It is clear that the anti-knock agents used in accordance with the present invention also in conjunction with other anti-knock agents such as tetraethyl lead, iron carbonyl, metal compounds of ß-diketones, aniline and the like can be used. It goes without saying that they are added separately or mixed with a diluent such as gasoline or another fuel Combustion chamber can be introduced by known means.

Claims (1)

Claim: Process for the preparation of an essentially gasoline hydrocarbon existing engine fuel, characterized in that it is the same, regardless of the stage of use, adding organic free radicals or substances, for example Tetraarylhydrazine, diarylnitrosamine, derivatives of triphenylmethyl, such as hexaarylethane and the like, which are capable of forming organic free radicals at elevated temperature. öerun. REVIEWS IN BREAKFAST