JPH0238120B2 - - Google Patents

Description

[Detailed description of the invention]

This invention relates to corrosion inhibiting compositions for use with alcohol fuels and normally liquid hydrocarbon fuels containing alcohol. Furthermore, the present invention relates to an alcohol fuel and an alkyl-containing normally liquid hydrocarbon fuel, which contain the above composition and are characterized by improved corrosion prevention properties. Alcohol fuels and usually liquid hydrocarbon fuels containing alcohol used in spark ignition and compression ignition internal combustion engines have high corrosive activity. This higher activity is due to acidic, halogen ion-containing contaminants that are generally present in alcohols but not normally present in liquid hydrocarbon fuels. These alcohol contaminants are particularly important for the tin/contaminants used on the interior surfaces of fuel tanks and fuel lines.
It has an adverse effect on various non-ferrous metals such as lead alloy coatings (ie, turn coatings) and zinc/aluminum metal alloys used in carburetor construction. As a result, motor vehicles using alcohol fuels and usually liquid hydrocarbon fuels containing alcohol are highly prone to corrosion in the areas of the fuel tank, fuel lines, and fuel intake system. As is well known, there are many patents disclosing various corrosion inhibiting additives for use with hydrocarbon fuels, which are typically liquid. For example, U.S. Pat.
See issue 2993771. In particular, patents related to corrosion prevention in alcohol fuels or hydrocarbon fuels containing alcohol, such as gasoline, include:
There are two, US Pat. No. 4,282,007 and US Pat. No. 4,282,000. The former discloses an additive consisting of a reaction product of aminotriazoles and polyisobutenylsuccinic anhydride, and the latter discloses an additive consisting of a reaction product of aminotriazole, isatoic anhydride, and N-alkylpropylene diamine. An additive comprising the product is disclosed. It is an object of the present invention to provide other corrosion inhibiting additives for use in alcohol fuels and normally liquid hydrocarbon fuels containing alcohol. Furthermore, it is an object of the present invention to provide an alcohol fuel containing the above-mentioned additives and a normally liquid hydrocarbon fuel containing alcohol. A further object of the present invention is to provide an alcohol fuel and a normally liquid hydrocarbon fuel containing alcohol, which are characterized by improved corrosion protection. The present invention relates in its broadest sense to alcohol fuels and compositions for use in normally liquid hydrocarbonaceous petroleum distillate fuels containing alcohol;
This composition comprises (A) at least one succinic acylating agent selected from unsubstituted succinic acylating agents and aliphatic hydrocarbon group-substituted succinic acylating agents; (In the formula, R ₁ is a hydrocarbon group, R ₂ and R ₃ are independently hydrogen or a hydrocarbon group, but,
When R ₂ and R ₃ are both hydrogen, R ₁ is a hydrocarbon group selected from tertiary alkyl, cycloalkyl, aryl, aralkyl, and alkaryl groups. ) with at least one amine. The present invention further relates to a fuel composition for use in an internal combustion engine, which composition comprises (A) (i) about 2 to 100% by volume of an alcohol having from 1 to about 5 carbon atoms; and (ii) a normally liquid fuel composition. (B) a major portion of the fuel containing about 98-0% by volume of hydrocarbon petroleum fraction fuel; and (B) a minor portion of the corrosion-inhibiting reaction product generally described above. The corrosion inhibiting additive of the present invention reacts with a succinic acylating agent selected from unsubstituted succinic acylating agents and aliphatic hydrocarbon group-substituted succinic acylating agents and monoamines specified below. It is then prepared. The term "hydrocarbon-based" or "hydrocarbon-based group" as used herein means a group in which the carbon atom is directly bonded to the remainder of the molecule and which, within the context of the present invention, is primarily hydrocarbon in nature. Such groups include: (1) hydrocarbon groups; i.e., aliphatic groups (e.g.
alkyl or alkenyl), cycloaliphatic groups (e.g. cycloalkyl or cycloalkenyl),
Aromatic groups, aliphatic-substituted aromatic groups, alicyclic-substituted aromatic groups, cyclic groups in which the ring is completed elsewhere in the molecule (i.e., any two of the above substituents are both alicyclic and two or more fused benzene nuclei. Such groups are known to those skilled in the art; representative examples include methyl, ethyl, propyl, butyl,
Octyl, decyl, dodecyl, cyclohexyl, phenyl, tolyl, benzyl, naphthyl,
These include anthryl and phenanthryl. (2) Substituted hydrocarbon radicals; ie, radicals containing non-hydrocarbon substituents that do not change the primarily hydrocarbon nature of the radical within the context of the present invention. Those skilled in the art will be aware of suitable substituents (hydroxy, alkoxy, carbaalkoxy, etc.). Succinic acylating agents useful in preparing the additive compositions of the present invention have the structure:

【formula】

[Formula] (wherein R is hydrogen or about 3 to about 100 carbon atoms,
Preferably from about 8 to about 10, most preferably from about 9 to about
15 aliphatic hydrocarbon groups) and their anhydrides. Although the source of the aliphatic hydrocarbon substituent is not a critical aspect of the invention, the substituent is generally a 1-mono-olefin or its oligomers, prepolymers, or low molecular weight polymers. Representative examples of such 1-monoolefins include ethylene, propylene, 1-butene, isobutene, 1-hexene, 1-octane, 2-methyl-1-heptene, 3-cyclohexyl-1-butene, 2- Methyl-5-propyl-
Examples include 1-hexene. Also useful are medial olefins, ie, olefins in which the olefin linkage is not in a terminal position, and their oligomers, prepolymers, and low molecular weight polymers. Representative examples of such olefins include:
These include 2-butene, 3-pentene and 4-octene. Although both unsubstituted succinic acylating agents and aliphatic hydrocarbon-based group-substituted succinic acylating agents can be used to prepare the additive compositions of the present invention, aliphatic hydrocarbon-based groups Substituted succinic acylating agents are preferred. They are well known and can be prepared by various known methods. One particularly useful method involves reacting a monoolefin monomer, or its oligomer, prepolymer, or low molecular weight polymer, as described above, with maleic anhydride at 100°C to 200°C with or without a catalyst. This is a method for forming the corresponding substituted succinic anhydride. Also, in place of the monoolefin, an alkyl halide that can be substituted with an unsubstituted anhydride or its equivalent free acid can be used. Aliphatic hydrocarbon substituents can be saturated or unsaturated, straight-chain or branched, and may contain polar groups if they are not present in such a large proportion that they change the hydrocarbon nature of the substituent. . Typical examples of polar groups include halo, carbonyl and similar groups. In a preferred embodiment, the aliphatic hydrocarbon substituent is a C12 polyisopropenyl group. Amines useful in preparing additive compositions have the formula (In the formula, R ₁ is a hydrocarbon group; R ₂ and R ₃ are independently hydrogen or a hydrocarbon group, provided that R ₂
and R ₃ are both hydrogen, R ₁ is a hydrocarbon group selected from a tertiary alkyl group, a cycloalkyl group, an aryl group, an alkaryl group and an aralkyl group). Within the broader scope of the invention, monoamines of the above formula are linear or branched aliphatic, cycloaliphatic and aromatic amines; i.e. R ₁ , R ₂ , and
Each of R ₃ is aliphatic-alicyclic, alicyclic-aromatic, and aliphatic-aromatic amines, and aliphatic-substituted alicyclic, aliphatic-substituted aromatic, alicyclic-substituted aromatic and substituted amines such as aromatic substituted alicyclic amines. More specifically,
The monoamines useful in preparing the corrosion inhibitors of this invention are the amines defined by the above formula, where R ₁ is a straight and branched alkyl group having from 1 to about 24 carbon atoms. group, about 5 to about 7 carbon atoms
cycloalkyl groups having from about 6 to about 14 carbon atoms, and aryl groups having from about 7 to about 14 carbon atoms, respectively.
a hydrocarbon group having 1 to about 24 carbon atoms selected from 20 alkaryl groups and aralkyl groups, and R ₂ and R ₃ are hydrogen or 1 to about 24 carbon atoms;
24 straight or branched alkyl groups, cycloalkyl groups of about 5 to about 7 carbon atoms, about 6 to about 7 carbon atoms;
Hydrocarbon-based groups selected from aryl groups of about 7 and alkaryl and aralkyl groups of about 7 to about 20 carbon atoms. When R ₂ and R ₃ are both hydrogen and the above amine is a primary amine,
R ₁ is a tertiary alkyl group having about 5 to about 7 carbon atoms;
A hydrocarbon group selected from a cycloalkyl group having about 4 to about 24 carbon atoms, an aryl group having about 6 to about 14 carbon atoms, and an alkaryl group and an aralkyl group each having about 5 to about 7 carbon atoms. be. The purpose of this condition is to provide sufficient inherent steric hindrance to R ₁ to prevent any imide formation. The additive compositions of the present invention are primarily amide acid salts or mixtures of amide acids and amide acid salts, depending on the nature and relative proportions of the starting reactants. The amines do not contain any acetylenic unsaturation where the R group of the amine should be unsaturated. Representative (non-limiting) examples of monoamines useful in preparing the additive compositions of the present invention include dimethylamine, trimethylamine, diethylamine, triethylamine, dipropylamine, tripropylamine, diisopropylamine, Dibutylamine, tributylamine, diisobutylamine, triisobutylamine, tert-butylamine, ethyl-n-butylamine, diethylbutylamine, di-n-amylamine, tri-n
-amylamine, dihexylamine, trihexylamine, dioctylamine, trioctylamine, N-dodecyl-1-dodecaneamine, N-octyl-1-octadecaneamine, N,N-dimethyl-1-octadecaneamine, cyclopentylamine, cyclo Pentenylamine, cyclohexylamine, dicyclohexylamine, methylethanolamine, benzylamine, aniline, o-
Phenylaniline, diphenylamine, 2-methyldiphenylamine, 3-methyldiphenylamine, 4,4'-dimethyldiphenylamine, N-phenyl-1-naphthylamine, N-phenyl-2
-Naphthylamine, etc. In one embodiment, the additive composition is prepared by reacting a succinic acylating agent with a secondary amine or a secondary/tertiary amine mixture as described below. In a preferred embodiment, the additive composition is prepared by reaction of a succinic acylating agent and a secondary amine. The most preferred secondary amine used in preparing the additive compositions of the present invention is dicyclohexylamine. The corrosion inhibitor additive compositions of the present invention can be prepared by heating a mixture of an unsubstituted or aliphatic hydrocarbon group-substituted succinic acylating agent and an amine at elevated temperatures ranging from about 30°C to about 200°C. Therefore, it can be easily prepared. The most preferred temperature range is about 50℃ ~
The temperature is approximately 150℃. However, in general, very suitable reaction rates can be achieved between about 50<0>C and about 120<0>C. The proportions of reactants can vary widely. For example, the molar ratio of unsubstituted or aliphatic hydrocarbon-based substituted succinic acylating agent to monoamine is approximately
A range of 1.0:0.5 to about 1.0:3.0 is possible. However, the preferred molar ratio is from about 1.0:1.0 to about 1.0:
2.0, most preferably 1.0:2.0. The additive compositions described herein can be prepared either in the absence or presence of a solvent.
Preferably, the composition is prepared in the presence of a solvent. Useful solvents can be hydrocarbons or polar solvents, for example benzene, naphtha, toluene, xylene, n-hexane, dioxane,
Examples include chlorobenzene, kerosene, gasoline, fuel oil or oil of lubricating viscosity. The following examples illustrate the preparation of additive compositions of the present invention and the improved corrosion properties of alcoholic fuels or normally liquid alcohol-containing fuels containing the compositions of the present invention. In the following examples, all parts are by weight unless otherwise specified. Example 1 Tetrapropenylphenyl-substituted succinic anhydride (prepared by reacting maleic anhydride with polyethylene tetramer, average molecular weight approx.
248) was charged to a reaction vessel equipped with a stirrer, thermometer, reflux condenser, and addition funnel. 0.50 parts of dicyclohexylamine at room temperature
Added over time. The temperature of the reaction mixture rose to 45° C. during the addition. The reaction continued for 4.5 hours at 45°C. The temperature was increased to 60°C over 0.5 hours. The reaction product was then collected by filtration. Example 2 265 parts of the tetrapropenylphenyl-substituted succinic anhydride described in Example 1 were charged to a reaction vessel equipped with a stirrer, thermometer, reflux condenser, and addition funnel. Next, 362 parts of dicyclohexylamine,
The reaction mixture was added to the reaction vessel over 2 hours while heating to 120°C. This addition caused an exotherm. The reaction continued for 3 hours at 120°C. Then,
322 parts of kerosene were added to the reaction mixture. The mixture was mixed well and collected by filtration. Example 3 266 parts of the tetrapropenyl-substituted succinic anhydride described in Example 1 and 338 parts of xylene were charged to the reaction vessel described in the previous examples. The mixture was heated to 110°C with stirring and then 362 parts of dicyclohexylamine were added over 1 hour at 110-120°C. The reaction continued for 3.25 hours at 110°C.
The reaction mixture was then collected by filtration. Example 4 248 parts of an oil solution of tetrapropenyl-substituted succinic acid (prepared by reacting tetrapropenyl-substituted succinic anhydride with water) in Example 1
The mixture was filled into the reaction vessel described in . Then 200 parts of dicyclohexylamine were added over 0.5 hour. During this addition, the temperature of the reaction mixture ranges from room temperature to
The temperature rose to 49℃. Then add 116 parts of mineral oil,
This mixture was stirred for an additional 0.5 hour. after that,
The mixture was filtered and collected. Example 5 266 parts of tetrapropenyl-substituted succinic anhydride were charged to the reaction vessel described in Example 1. After heating this material to 110°C, 20 parts of distilled water were added.
This mixture was reacted at 110°C for 1.75 hours. The reaction product (ie, tetrapropenyl-substituted succinic acid) was then cooled to 55° C. and 362 parts of dicyclohexylamine were added. This amine addition is an exothermic reaction and the temperature of the reaction mixture is approximately 65°C.
It rose to The reaction mixture was then heated to 70°C and reacted at this temperature for 4 hours. After cooling, 349 parts of xylene was added. A xylene solution of this reaction product was thoroughly stirred and collected by filtration. Example 6 A reaction vessel equipped as described in Example 1 was charged with 98 parts of tetrapropenyl-substituted succinic anhydride (average molecular weight 268) and 60 parts of xylene.
A solution consisting of 134 parts of dicyclohexylamine and 65 parts of xylene was then added over 0.5 hours. As the amine solution was added, the temperature of the reaction mixture increased from room temperature to about 34°C. The reaction mixture was then heated to 75°C and reacted at this temperature for a total of 5 hours. Thereafter, the solution containing the reaction product was cooled and collected by filtration. Example 7 266 parts of tetrapropenyl-substituted succinic anhydride were charged to a reaction vessel as described in Example 1. Primene 81R (a C ₁₂ -C ₁₄ t-alkyl primary amine mixture commercially available from Rohm and Haas) was then added dropwise over a period of 3 hours. The reaction was exothermic and the temperature of the reactants rose from room temperature to about 59° C. during the amine addition. Then, 160 parts of diluent oil was added to the reaction product and the stirring was increased to 55°C.
It continued for another hour. After cooling to 40°C, the reaction material was collected by filtration. Example 8 266 parts of tetrapropenyl-substituted succinic anhydride were charged to a reaction vessel as described in Example 1. 362.6 parts of dicyclohexylamine was then added dropwise to the reaction vessel over a period of 1 hour. The reaction of the anhydride with the amine was exothermic and the temperature of the reaction mixture rose to 36°C. The mixture was reacted at 36-45° C. with heating for 1 hour. The product was then filtered and collected. Example 9 To a solution of 266 parts of tetrapropenyl-substituted succinic anhydride in 253 parts of xylene in a reaction vessel as described in Example 1 was added a solution of 362.6 parts of dicyclohexylamine in 85 parts of xylene over a period of 1 hour. During this addition, the temperature rose to 32°C due to an exothermic reaction. The mixture was then reacted at 32-50°C for 1 hour, filtered and collected. Thereafter, 60 parts of this product was further diluted with 40 parts of xylene and mixed thoroughly. Example 10 A series of alcoholic fuels were prepared by mixing 35-450 parts by weight of one of the reaction products of Examples 1-9 with aqueous ethanol containing about 7.5% water by weight. Example 11 35 to 450 parts by weight of one of the reaction products of Examples 1 to 9 are added to 20% by weight of aqueous ethanol and the ASTM distillation range is from about 60°C at the 10% distillation point to about 205°C at the 90% distillation point. A series of alcohol-containing gasoline fuels were prepared by mixing a certain gasoline with an alcohol-containing gasoline consisting of 80% by weight. Brazilian Association of Technical Norms (ABNT) Method K, Exam C
The corrosion-inhibiting effectiveness of the additive composition was tested. In this test, various samples (e.g.
steel, brass, and zinc/aluminum alloys) in commercially available aqueous ethanol at a temperature of 50°C ± 3°C.
Soaked for 144 hours. At the end of this test period, each test sample was rinsed first with water, then with ketone or other suitable solvent, and dried. After drying, each test sample was weighed and its visual appearance was carefully observed. The weight loss (if any) and visual appearance of the samples were then determined in a similar manner in a control or standard gasoline/alcohol mixture consisting of 78-82% by weight gasoline and 22-18% by weight 100% absolute alcohol. compared with that of the treated sample. For a corrosion-inhibiting additive to be effective, neither the weight loss nor the visual appearance of samples tested in aqueous ethanol containing the additive must be 10% lower than that treated in a control, i.e., standard gasoline/alcohol mixture. Nothing will change. The corrosion inhibiting additive compositions described in Examples 1-9 were found to be effective when tested by this Brazilian method. The present invention also relates to a fuel composition for use in an internal combustion engine, which composition comprises: (A) (i) at least one alcohol having from 1 to about 5 carbon atoms; and (ii) a hydrocarbonaceous petroleum fraction, usually in liquid form. (B) a corrosion inhibiting reaction product as described above, namely (i) at least one selected from the group of unsubstituted and aliphatic hydrocarbon-based substituted succinic acylating agents; One type of succinic acid-based acylating agent and formula (ii)

A reaction product of the formula: (wherein R ₁ , R ₂ and R ₃ are the same as above) with at least one amine. Alcohol fuels useful in combination with the corrosion inhibiting reaction products of succinic acylating agents and amines, as described herein, to provide combustion compositions with improved corrosion inhibiting properties include methanol, ethanol, Commercially available alcohols include propanol, isopropanol, butanol and its isomers, amyl alcohol and its isomers, and mixtures of these various alcohols. Preferred alcohols, as commercially produced, are methanol and ethanol. Normally liquid hydrocarbonaceous petroleum distillate fuels useful in combination with alcohols and the above corrosion inhibiting reaction products include automotive gasoline as defined by ASTM D439, and gasoline as defined by ASTM D396. diesel fuel or fuel oil. However, a particularly preferred petroleum distillate fuel is gasoline, a mixture of hydrocarbons whose ASTM distillation range ranges from about 60°C at 10% distillation point to about 205°C at 90% distillation point. The fuel portion of the fuel composition of the present invention has 1 carbon atom.
~ at least one alcohol of about 5 ~ 2.0 ~ 100
% by volume and usually from about 98.0 to 0% by volume of liquid hydrocarbonaceous petroleum distillate fuel. In a preferred embodiment,
The fuel portion consists of about 10.0-100% by volume of at least one alcohol having from 1 to about 5 carbon atoms and about 90.0%-0% by volume of petroleum distillate fuel. In more preferred embodiments, the alcohol and petroleum distillate fuels used in the fuel compositions of the present invention range from about 20.0 to 100% by volume and from about 80.0 to 0% by volume, respectively. Particularly preferred fuel compositions include an alcohol, especially methanol or ethanol, and a petroleum distillate fuel,
In particular, it is mainly composed of a mixture with gasoline, and the alcohol component in this mixture is about 10 to about
20.0% by volume, and petroleum distillate fuels from about 90.0 to approx.
Ranging from 80.0% by volume. The amount of additive reaction product of the succinic acylating agent and the amine added to the fuel portion to obtain the fuel compositions of the present invention is sufficient to impart improved corrosion protection properties to these fuel compositions. It is. Broadly, this amount ranges from about 10 to about 1000 parts by weight of the additive reaction product per million parts by weight of fuel portion. Preferably, this amount ranges from about 10 to about 450 parts by weight, with a range of about 175 to 450 parts by weight of the additive reaction product per million parts by weight of fuel being most preferred. The fuel composition of the present invention can be prepared by simply adding the reaction product of a succinic acid-based acylating agent and an amine directly to the fuel part. The reaction product may be diluted with a substantially inert, normally liquid organic diluent or a petroleum distillate fuel such as those described above to form a concentrate, which is then added to the fuel portion. These concentrates constitute a further aspect of the invention and generally contain from about 20 to about 90% of the additive reaction products of the invention. The fuel compositions described above may also contain other additives commonly added to liquid fuels to obtain certain benefits. Therefore, the fuel composition of the present invention contains antiknock agents such as tetraalkyl lead compounds;
Lead scavengers such as haloalkanes (e.g. ethylene dichloride and ethylene dibromide), anti-fouling agents or modifiers such as triaryl phosphates, dyes, octane improvers, 2,6-di-tert-butyl-4- It may also contain antioxidants such as methylphenol, antigum agents, metal deactivators, demulsifiers, upper cylinder lubricants, and antifreeze agents.

Claims (1)

[Scope of Claims] 1 (A) at least one succinic acylating agent selected from unsubstituted and aliphatic hydrocarbon group-substituted succinic acylating agents; and (B) a compound of the formula (In the formula, R ₁ is a hydrocarbon group; R ₂ and R ₃ are independently hydrogen or a hydrocarbon group, provided that R ₂
and R ₃ are both hydrogen, R ₁ is a hydrocarbon group selected from a tertiary alkyl group, a cycloalkyl group, an aryl group, an alkaryl group, and an aralkyl group). Corrosion inhibitor used in alcohol fuels and normally liquid hydrocarbon petroleum distillate fuels containing alcohol, consisting of reaction products. 2. The corrosion inhibitor according to claim 1, wherein the succinic acid-based acylating agent (A) is an aliphatic hydrocarbon group-substituted succinic acid or an anhydride thereof. 3 Acylating agent that is succinic acid or its anhydride
The aliphatic hydrocarbon substituent in (A) has about 3 or more carbon atoms.
Corrosion inhibitor according to claim 2, characterized in that it has about 100 straight or branched alkyl or alkenyl groups. 4 Acylating agent that is succinic acid or its anhydride
The aliphatic hydrocarbon substituent in (A) has about 8 or more carbon atoms.
Claim 2, characterized in that it is about 30 straight or branched alkyl or alkenyl groups.
Corrosion inhibitors listed in section. 5 The aliphatic hydrocarbon substituent of the acylating agent (A), which is succinic acid or its anhydride, has a carbon thickness of about 9
3. The corrosion inhibitor of claim 2, wherein the corrosion inhibitor has from about 15 straight or branched alkyl or alkenyl groups. 6 Acylating agent that is succinic acid or its anhydride
Corrosion prevention according to any one of claims 3, 4 and 5, characterized in that the aliphatic hydrocarbon substituent in (A) is a linear or branched alkenyl group. agent. 7 Acylating agent that is succinic acid or its anhydride
7. The corrosion inhibitor according to claim 6, wherein the aliphatic hydrocarbon substituent (A) is a polypropenyl group having 12 carbon atoms. 8 Amine (B) is the formula (In the formula, R ₁ is a hydrocarbon group having 1 to about 24 carbon atoms; R ₂ and R ₃ are independently hydrogen or a hydrocarbon group having 1 to about 24 carbon atoms, provided that R ₂ and R ₃ are both hydrogen, R ₁ is a tertiary alkyl group having from about 4 to about 24 carbon atoms, from about 5 to about 24 carbon atoms;
about 7 cycloalkyl groups, about 6 to about 14 carbon atoms
aryl group, and an alkaryl group and an aralkyl group having about 7 to about 20 carbon atoms. Corrosion inhibitor according to any of paragraphs. 9. The corrosion inhibitor according to claim 8, wherein R ₂ is a hydrocarbon group and R ₃ is hydrogen. 10 Hydrocarbon group R ₁ has about 1 to about 24 carbon atoms
a straight or branched chain alkyl group of about 6 carbon atoms
~about 14 aryl groups and about 7 to about 20 carbon atoms
R ₂ and R ₃ are independently hydrogen or a straight or branched alkyl group having from about 1 to about 24 carbon atoms, from about 5 to about 24 carbon atoms; 7 cycloalkyl group, an aryl group having about 6 to about 14 carbon atoms, and an alkaryl group and an aralkyl group having about 7 to about 20 carbon atoms. The corrosion inhibitor according to item 8. 11 _R2 is a straight or branched alkyl group having about 1 to about 24 carbon atoms, a cycloalkyl group having about 5 to about 7 carbon atoms, an aryl group having about 6 to about 14 carbon atoms, and a carbon atom 11. The corrosion inhibitor of claim 10, wherein the corrosion inhibitor is a hydrocarbon group selected from about 7 to about 20 alkaryl and aralkyl groups, and _R3 is hydrogen. 12. The corrosion inhibitor of claim 11, wherein R ₁ and R ₂ are cycloalkyl groups having about 5 to about 7 carbon atoms. 13. The corrosion inhibitor according to claim 12, wherein R ₁ and R ₂ are cyclohexyl groups. 14 (A) at least one straight-chain or branched-chain alkenyl-substituted succinic acid or anhydride thereof; and (B) a compound of the formula (In the formula, R ₁ is a hydrocarbon group having 1 to about 24 carbon atoms; R ₂ and R ₃ are independently hydrogen or a hydrocarbon group having 1 to about 24 carbon atoms, provided that R ₂ and R ₃ are both hydrogen, R ₁ is a tertiary alkyl group having from about 4 to about 24 carbon atoms, from about 5 to about 24 carbon atoms;
about 7 cycloalkyl groups, about 6 to about 14 carbon atoms
a hydrocarbon group selected from aryl groups, and alkaryl groups and aralkyl groups having from about 7 to about 20 carbon atoms, with at least one amine. The corrosion inhibitor according to claim 1. 15. The corrosion inhibitor according to claim 14, wherein _R2 is a hydrocarbon group having about 1 to about 24 carbon atoms, and _R3 is hydrogen. 16 Hydrocarbon group R ₁ is a straight chain or branched alkyl group having 1 to about 24 carbon atoms, about 5 to about 24 carbon atoms
about 7 cycloalkyl groups, about 6 to about 14 carbon atoms
aryl groups, and alkaryl and aralkyl groups having from about 7 to about 20 carbon atoms; R ₂ and R ₃ are independently hydrogen or a straight or branched chain having from 1 to about 24 carbon atoms; a branched alkyl group, a cycloalkyl group having about 5 to about 7 carbon atoms,
Claim 14, characterized in that the hydrocarbon group is selected from aryl groups having about 6 to about 14 carbon atoms, and alkaryl and aralkyl groups having about 7 to about 20 carbon atoms. corrosion inhibitor. 17 R ₂ is a straight or branched alkyl group having 1 to about 24 carbon atoms, a cycloalkyl group having about 5 to about 7 carbon atoms, an aryl group having about 6 to about 14 carbon atoms, and a carbon atom number 17. The corrosion inhibitor of claim 16, wherein the hydrocarbon group is selected from about 7 to about 20 alkaryl and aralkyl groups, and _R3 is hydrogen. 18. The corrosion inhibitor of claim 17, wherein R ₁ and R ₂ are cycloalkyl groups having about 5 to about 7 carbon atoms. 19. The corrosion inhibitor according to claim 18, wherein R ₁ and R ₂ are cyclohexyl groups. 20 The linear or branched alkenyl substituent of succinic acid or its anhydride (A) has from about 3 to about
100. The corrosion inhibitor according to any one of claims 14 to 19, wherein the corrosion inhibitor is 21 The linear or branched alkenyl substituent of succinic acid or its anhydride (A) has about 8 to about 30 carbon atoms.
21. The corrosion inhibitor according to claim 20, which is a corrosion inhibitor. 22 The linear or branched alkenyl substituent of succinic acid or its anhydride (A) has from about 9 to about 15 carbon atoms.
21. The corrosion inhibitor according to claim 20, which is a corrosion inhibitor. 23. The corrosion inhibitor according to claim 20, wherein the linear or branched alkenyl substituent of succinic acid or its anhydride (A) is a polypropenyl group having about 12 carbon atoms. . 24 (A) A fuel containing (i) about 2.0 to 100% by volume of at least one alcohol having from 1 to about 5 carbon atoms, and (ii) about 98.0 to 0% by volume of a normally liquid hydrocarbonaceous petroleum distillate fuel. (B) at least one succinic acylating agent selected from (i) unsubstituted and aliphatic hydrocarbon substituted succinic acylating agents; and (ii) (In the formula, R ₁ is a hydrocarbon group; R ₂ and R ₃ are independently hydrogen or a hydrocarbon group, provided that R ₂
and R ₃ are both hydrogen, R ₁ is a hydrocarbon group selected from tertiary alkyl, cycloalkyl, aryl, alkaryl and aralkyl groups) with at least one amine. A fuel composition for use in an internal combustion engine, comprising a small amount of a product. 25. The fuel composition according to claim 24, wherein the succinic acid-based acylating agent (B)(i) is an aliphatic hydrocarbon group-substituted succinic acid or an anhydride thereof. 26 The aliphatic hydrocarbon substituent of the acylating agent (B)(i), which is succinic acid or its anhydride, is a straight or branched alkyl or alkenyl group having about 3 to about 100 carbon atoms. 26. The fuel composition of claim 25. 27 The aliphatic hydrocarbon substituent of the acylating agent (B)(i), which is succinic acid or its anhydride, is a straight or branched alkali or alkenyl group having about 8 to about 30 carbon atoms. 26. The fuel composition of claim 25. 28 The aliphatic hydrocarbon substituent of the acylating agent (B)(i), which is succinic acid or its anhydride, is a straight or branched alkyl or alkenyl group having about 9 to about 15 carbon atoms. 26. The fuel composition of claim 25. 29 Claim 26, characterized in that the aliphatic hydrocarbon substituent of the acylating agent (B)(i) which is succinic acid or its anhydride is a linear or branched alkenyl group; The fuel composition according to item 27 or 28. 30 The aliphatic hydrocarbon substituent of the acylating agent (B) (i) which is succinic acid or its anhydride has 12 carbon atoms.
The fuel composition according to claim 29, characterized in that it is a polypropenyl group. 31 Amine (B)(ii) has the formula (In the formula, R ₁ is a hydrocarbon group having from 1 to about 24 carbon atoms; R ₂ and R ₃ are independently hydrogen or a hydrocarbon group having from about 1 to about 24 carbon atoms, provided that R ₂
and R ₃ are both hydrogen, R ₁ is a tertiary alkyl group having about 4 to about 24 carbon atoms, about 5 carbon atoms;
~about 7 cycloalkyl groups, about 6 to about 7 carbon atoms
14 aryl groups, and alkaryl groups and aralkyl groups having from about 7 to about 20 carbon atoms). 29. The fuel composition according to any of paragraph 28. 32. The fuel composition according to claim 31, wherein R ₂ is a hydrocarbon group and R ₃ is hydrogen. 33 The hydrocarbon group R ₁ is a straight or branched alkyl group having 1 to about 24 carbon atoms, a cycloalkyl group having about 5 to about 7 carbon atoms, an aryl group having about 6 to about 14 carbon atoms, and selected from alkaryl and aralkyl groups having from about 7 to about 20 carbon atoms; R ₂ and R ₃ are independently hydrogen or a straight or branched alkyl group having from 1 to about 24 carbon atoms;
A hydrocarbon group selected from cycloalkyl groups having about 5 to about 7 carbon atoms, aryl groups having about 6 to about 14 carbon atoms, and alkaryl and aralkyl groups having about 7 to about 20 carbon atoms. 32. The fuel composition according to claim 31, characterized in that: 34 R ₂ is a straight or branched alkyl group having 1 to about 24 carbon atoms, a cycloalkyl group having about 5 to about 7 carbon atoms, an aryl group having about 6 to about 14 carbon atoms, and a carbon atom number 34. The fuel composition of claim 33, wherein R3 is a hydrocarbon group selected from about 7 to about 20 alkaryl and aralkyl groups, and _R3 is hydrogen. 35. The fuel composition of claim 34, wherein _R1 and _R2 are cycloalkyl groups having about 5 to about 7 carbon atoms. 36. The fuel composition according to claim 35, wherein R ₁ and R ₂ are cyclohexyl groups. 37 (A)(i) Methanol or ethanol about 10~
(B) (i) at least one linear or branched alkenyl substitution; Succinic anhydride or its acid acylating agent and formula (ii) (In the formula, R ₁ is a hydrocarbon group; R ₂ and R ₃ are independently hydrogen or a hydrocarbon group, provided that R ₂
and R ₃ are both hydrogen, R ₁ is a hydrocarbon group selected from tertiary alkyl, cycloalkyl, aryl, alkaryl and aralkyl groups) with at least one amine. 25. A fuel composition according to claim 24, comprising a small portion of the product. 38. The fuel composition according to claim 37, wherein R ₂ is a hydrocarbon group and R ₃ is hydrogen. 39 Hydrocarbon group R ₁ is a straight or branched alkyl group having 1 to about 24 carbon atoms, about 5 to about 24 carbon atoms
about 7 cycloalkyl groups, about 6 to about 14 carbon atoms
aryl groups, and alkaryl and aralkyl groups having from about 7 to about 20 carbon atoms; R ₂ and R ₃ are independently hydrogen or a straight or branched chain having from 1 to about 24 carbon atoms; a branched alkyl group, a cycloalkyl group having about 5 to about 7 carbon atoms,
Claim 37, characterized in that the hydrocarbon group is selected from aryl groups having about 6 to about 14 carbon atoms, alkaryl groups and aralkyl groups having about 7 to about 20 carbon atoms. fuel composition. 40 R ₂ is a straight or branched alkyl group having 1 to about 24 carbon atoms, a cycloalkyl group having about 5 to about 7 carbon atoms, an aryl group having about 6 to about 14 carbon atoms, and a carbon atom number 40. The fuel composition of claim 39, wherein the fuel composition is a hydrocarbon group selected from about 7 to about 20 alkaryl and aralkyl groups, and _R3 is hydrogen. 41. The fuel composition of claim 40, wherein R ₁ and R ₂ are cycloalkyl groups having from about 5 to about 7 carbon atoms. 42. The fuel composition according to claim 41, wherein R ₁ and R ₂ are cyclohexyl groups. 43 A patent claim characterized in that the linear or branched alkenyl substituent of the succinic anhydride or its acid acylating agent (B)(i) has from about 3 to about 100 carbon atoms. The fuel composition according to any one of the ranges 37 to 42. 44 Claims characterized in that the linear or branched alkenyl substituent of succinic anhydride or its acid acylating agent (B)(i) has from about 8 to about 30 carbon atoms. The fuel composition according to range item 43. 45 Claims characterized in that the straight chain or branched chain alkenyl substituent of succinic anhydride or its acid acylating agent (B)(i) has from about 9 to about 15 carbon atoms. The fuel composition according to range item 43. 46 Claim No. 4, characterized in that the linear or branched alkenyl substituent of the succinic anhydride or its acid acylating agent (B)(i) is a polypropenyl group having 12 carbon atoms. The fuel composition according to item 43. 47 (A) (i) about 20-100% ethanol by volume and (ii)
a majority of the fuel containing about 80% to 0% by volume of normally liquid hydrocarbonaceous petroleum fraction fuel;
species of straight-chain or branched-chain alkenyl (about 9 to about 15 carbon atoms) substituted succinic anhydride or its acid acylating agent and formula (ii) (wherein R ₁ and R ₂ are cycloalkyl groups of about 5 to about 7 carbon atoms and R ₃ is hydrogen) 25. The fuel composition according to claim 24, comprising: 48 The normally liquid hydrocarbonaceous petroleum distillate fuel (A) (ii) is gasoline, and the corrosion-inhibiting reaction product (B) is (i) a linear or branched alkenyl which is polypropenyl having 12 carbon atoms. 48. The fuel composition according to claim 47, which is a reaction product of a substituted succinic anhydride or its acidic acylating agent and (ii) dicyclohexylamine.