CN114717028B

CN114717028B - High-stability methanol gasoline and preparation method thereof

Info

Publication number: CN114717028B
Application number: CN202110763559.XA
Authority: CN
Inventors: 杨啟华
Original assignee: Hubei Xinyuexing Energy Co ltd
Current assignee: Hubei Xinyuexing Energy Co ltd
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2023-11-10
Anticipated expiration: 2041-07-06
Also published as: CN114717028A

Abstract

The invention belongs to the field of fuel chemical industry, and particularly relates to high-stability methanol gasoline and a preparation method thereof. The high stability methanol gasoline is prepared with the materials including at least base oil 40-80 weight portions, methanol 20-50 weight portions, cosolvent 1-10 weight portions, corrosion inhibitor 1-5 weight portions, antiknock agent 0.5-1 weight portions and assistant 20-40 weight portions. The inventor adds a certain cosolvent into the methanol gasoline, and improves the compatibility and stability between the methanol and the gasoline through the cosolvent, so that the methanol gasoline can still keep a uniform state after being placed for a long time, and the layering phenomenon of the methanol gasoline is reduced. The inventor reduces the corrosiveness of the methanol gasoline to the gasoline engine by adding a certain corrosion inhibitor, improves the antiknock performance of the methanol gasoline by adding a certain antiknock agent, further improves the stability of the methanol gasoline, and improves the cleanliness and stability of the methanol gasoline by adding a certain auxiliary agent, thereby improving the use quality of the methanol gasoline.

Description

High-stability methanol gasoline and preparation method thereof

Technical Field

The invention belongs to the technical field of fuel chemical industry, belongs to the technical field of classification number C10L, and particularly relates to high-stability methanol gasoline and a preparation method thereof.

Background

The methanol gasoline is a novel environment-friendly fuel, is a fuel substitute for automobiles, and is an important component of new energy. Crude oil is the most prominent primary energy source worldwide, and the essence of current energy shortage is crude oil shortage. The vehicle fuel is the most main application field of crude oil, and accounts for more than 70% of the total consumption of the crude oil worldwide. Methanol gasoline is a path of replacing oil with coal, and can be used as a substitute of gasoline so as to realize partial substitution of crude oil. However, the methanol gasoline sold in the market at present has poor stability, serious corrosion to a gasoline engine and more carbon deposition, and seriously reduces the use quality of the methanol gasoline.

The patent application number is CN201310721981.4, which discloses a methanol gasoline additive and methanol gasoline containing the additive, the raw materials for preparing the methanol gasoline in the technical scheme mainly comprise methanol, toluene, xylene, isobutanol, isopropanol, isoamyl alcohol, ethanol, 2, 6-di-tert-butyl-p-cresol antioxidant anti-glue agent, N-salicylidene-1, 2-propylenediamine metal passivating agent, polyisobutenylamide isooctyl ester, calcium petroleum sulfonate, benzotriazo file, dimer linoleic acid, sodium nitrite, alkyl polyglycoside, methyl tertiary butyl ether, triethanolamine oleate soap and emulsifier, and more additives are added in the methanol gasoline, so that a better balance state can not be maintained in the aspects of combustion effect and stability.

Patent application number CN201610553994. X discloses a methanol gasoline, wherein the raw materials for preparing the methanol gasoline comprise methanol, methylnaphthalene bisquinoline quaternary ammonium salt, morpholine derivatives, propynyl alcohol and a leveling agent, and the methanol gasoline has better corrosion resistance but poorer stability.

Disclosure of Invention

In order to solve the technical problems, the first aspect of the invention provides high-stability methanol gasoline, which is prepared from the following raw materials, by weight, at least 40-80 parts of base oil, 20-50 parts of methanol, 1-10 parts of cosolvent, 1-5 parts of corrosion inhibitor, 0.5-1 part of antiknock agent and 20-40 parts of auxiliary agent.

As a preferred embodiment, the cosolvent comprises at least one hydrocarbon and its derivatives.

As a preferred embodiment, the hydrocarbon and its derivative have at least one oxygen atom in their molecule.

As a preferred embodiment, the hydrocarbon and its derivative are selected from at least one of alkanes, alcohols, alcohol ethers, ketones, esters and ethers.

As a preferred technical scheme, the alcohol comprises a linear alcohol and a branched alcohol, and the mass ratio of the linear alcohol to the branched alcohol is 1: (3-5).

As a preferred embodiment, the straight-chain alcohol is n-decyl alcohol and the branched-chain alcohol is isodecyl alcohol.

The methanol gasoline contains a certain amount of methanol, the methanol contains hydroxyl with stronger polarity, is easy to form hydrogen bond with water to dissolve with each other, has stronger water absorption, can automatically absorb water from air in the process of storing and using the methanol gasoline, and is a hydrophobic substance. The inventor unexpectedly discovers that when a certain amount of long straight-chain alcohol and long branched-chain alcohol are added into the methanol gasoline, the stability of the methanol gasoline can be better improved, so that the methanol gasoline has certain water-resistant stability. Particularly when the straight chain alcohol is n-decyl alcohol and the branched chain alcohol is isodecyl alcohol, the water separation resistance is better. The inventor considers that possible reasons are that the n-decyl alcohol and the isodecyl alcohol both have alcoholic hydroxyl groups and lipophilic alkyl groups, so that the problems of large polarity difference and incompatibility among oil, water and alcohol can be well relieved. Particularly, branched alcohols, in which a plurality of alkyl chains are adsorbed on the oil phase interface, can improve the compatibility well, but when a large amount of branched alcohols are added, the viscosity of the system increases, and the usability and cleanliness of methanol gasoline are reduced.

As a preferable technical scheme, the corrosion inhibitor at least comprises nitrogen element.

As a preferred technical scheme, the corrosion inhibitor is polyetheramine.

As a preferred embodiment, the polyetheramine has a weight average molecular weight of 400.

When in use, the methanol gasoline can cause larger influence on the gasoline engine, can corrode the gasoline engine and damage the performance of the engine, thereby reducing the service life of the gasoline engine. The inventor finds that by adding certain polyether amine as a corrosion inhibitor, the polyether amine not only can form an adsorption film on the surface of a gasoline engine to prevent the gasoline engine from being corroded and protect the performance of the gasoline engine, but also can improve the separation resistance of methanol gasoline and the stability of the whole methanol gasoline, and can conduct charges generated in a gasoline product due to the existence of amino, so that the charges can leak out in time and the antistatic property and the safety of the product are improved. The inventors found that the use of a smaller molecular weight polyetheramine or a larger molecular weight polyetheramine, while having better corrosion inhibition to gasoline engines, does not improve the compatibility and phase separation resistance of methanol gasoline.

As a preferable technical scheme, the antiknock agent at least comprises ethanol and derivatives thereof.

As a preferable technical scheme, the antiknock agent is lithium ethoxide.

As a preferred embodiment, the auxiliary agent is at least one selected from the group consisting of a surfactant, an antistatic agent, an antioxidant, and a lubricant.

As a preferred embodiment, the surfactant is a nonionic surfactant and/or an anionic surfactant.

As a preferable technical scheme, the surfactant is a mixture of nonionic surfactant and anionic surfactant, and the mass ratio of the nonionic surfactant to the anionic surfactant is (5-7): 1.

as a preferred technical scheme, the anionic surfactant is sulfonate surfactant.

As a preferred embodiment, the sulfonate surfactant has an HLB of 11 to 13.

As a preferable technical scheme, the nonionic surfactant is fatty alcohol polyoxyethylene ether.

Because of the poor compatibility between methanol and base oil, the inventors increased the compatibility between methanol and base oil by adding certain surfactants. The inventor can better improve the compatibility between alcohol and oil and the cleanness and antistatic property of the whole gasoline product by adding a certain anionic surfactant and a nonionic surfactant, especially when the HLB of the sulfonate anionic surfactant is 11-13, and hydrophilic groups in the surfactant are tightly adsorbed on the interface of the oil and alcohol, so that the surface tension can be effectively reduced, brownian movement among methanol liquid beads is prevented, the liquid beads are not easy to agglomerate and grow, and the intersolubility between the methanol and the base oil is improved. And the cleanliness and water separation resistance of the gasoline product can be improved by adding the surfactant. The inventor considers that the water and alcohols in the methanol gasoline can be emulsified due to the combined action of the fatty acid sulfonate and the fatty alcohol polyoxyethylene ether, even if the methanol and the water form a water-in-oil structure, the oil-water interface is converted into an oil-oil interface, so that the methanol gasoline is not easy to phase separation, meanwhile, the micelle formed by the fatty acid sulfonate and the fatty alcohol polyoxyethylene ether are mutually doped and entangled, the mutual action of the micelle is avoided, the aggregation and adhesion of oil sludge and carbon deposit on the surface of a gasoline engine are avoided, meanwhile, the aggregation and the precipitation of the micelle are also avoided, and the storage stability of the whole methanol gasoline is improved.

The second aspect of the invention provides a preparation method of the high-stability methanol gasoline, which at least comprises the following steps:

(1) Adding methanol, cosolvent, corrosion inhibitor, antiknock agent and auxiliary agent into stirring kettle, stirring for 0.1-3h under the condition of 100r/min-500r/min to obtain mixture A;

(2) Adding base oil into the mixture A, and stirring for 1-3h under the condition of 100-500 r/min.

In addition, the raw materials used are commercially available unless otherwise indicated.

The beneficial effects are that: the inventor adds a certain cosolvent into the methanol gasoline, and improves the compatibility and stability between the methanol and the gasoline through the cosolvent, so that the methanol gasoline can still keep a uniform state after being placed for a long time, and the layering phenomenon of the methanol gasoline is reduced. The inventor reduces the corrosiveness of the methanol gasoline to the gasoline engine by adding a certain corrosion inhibitor, improves the antiknock performance of the methanol gasoline by adding a certain antiknock agent, further improves the stability of the methanol gasoline, and improves the cleanliness and stability of the methanol gasoline by adding a certain auxiliary agent, thereby improving the use quality of the methanol gasoline.

Detailed Description

Example 1

In order to solve the technical problem, the first aspect of the present embodiment provides a high-stability methanol gasoline, wherein the preparation raw materials include, by weight, 40 parts of base oil, 20 parts of methanol, 1 part of cosolvent, 1 part of corrosion inhibitor, 0.5 part of antiknock agent and 20 parts of auxiliary agent.

The base oil comprises No. 93 gasoline, no. 120 solvent oil and industrial petroleum ether, and the weight ratio of the base oil is 1:2:1, the industrial petroleum ether is purchased from Shandong Xin chemical industry Co., ltd, and the CAS number is: 133-1-51. The cosolvent is a mixture of n-decyl alcohol and isodecyl alcohol, and the mass ratio between the n-decyl alcohol and the isodecyl alcohol is 1:3. the corrosion inhibitor is polyetheramine, the weight average molecular weight of the polyetheramine is 400, and the polyetheramine is purchased from Aite (Shandong) New Material Co., ltd., CAS number: 9046-10-0. The antiknock agent is lithium ethoxide purchased from the wuhan kemi biotechnology pharmaceutical technology company, CAS number: 2388-07-0. The auxiliary agent is a surfactant, an antistatic agent, an antioxidant and a lubricant, wherein the surfactant is 18 parts, the antistatic agent is 1 part, the antioxidant is 0.5 part and the lubricant is 0.5 part, the surfactant is a mixture of a nonionic surfactant and an anionic surfactant, and the mass ratio of the nonionic surfactant to the anionic surfactant is 5:1. the anionic surfactant is fatty acid methyl ester ethoxylated sodium sulfonate, the HLB of the fatty acid methyl ester ethoxylated sodium sulfonate is 12.5, the fatty acid methyl ester ethoxylated sodium sulfonate is purchased from Jinhui environmental protection technology Co., dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Jiangsu province sea-ampere petrochemical plant, model: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from sea-ampere petrochemical plant in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology Co., ltd, and has the product number of: m828055. The lubricant is sodium chloride.

The second aspect of the invention provides a preparation method of the high-stability methanol gasoline, which comprises the following steps:

(1) Adding methanol, a cosolvent, a corrosion inhibitor, an antiknock agent and an auxiliary agent into a stirring kettle, and stirring for 0.2h under the condition of 200r/min to obtain a mixture A;

(2) Adding base oil into the mixture A, and stirring for 0.5h under the condition of 500 r/min.

Example 2

In order to solve the technical problem, the first aspect of the embodiment provides a high-stability methanol gasoline, which comprises, by weight, 60 parts of base oil, 35 parts of methanol, 5 parts of cosolvent, 2.5 parts of corrosion inhibitor, 0.75 part of antiknock agent and 30 parts of auxiliary agent. The base oil comprises No. 93 gasoline, no. 120 solvent oil and industrial petroleum ether, and the weight ratio of the base oil is 1:2:1, the industrial petroleum ether is purchased from Shandong Xin chemical industry Co., ltd, and the CAS number is: 133-1-51. The cosolvent is a mixture of n-decyl alcohol and isodecyl alcohol, and the mass ratio between the n-decyl alcohol and the isodecyl alcohol is 1:3. the corrosion inhibitor is polyetheramine, the weight average molecular weight of the polyetheramine is 400, and the polyetheramine is purchased from Aite (Shandong) New Material Co., ltd., CAS number: 9046-10-0. The antiknock agent is lithium ethoxide purchased from the wuhan kemi biotechnology pharmaceutical technology company, CAS number: 2388-07-0. The auxiliary agent comprises 24 parts of surfactant, 3 parts of antistatic agent, 1.5 parts of antioxidant and 1.5 parts of lubricant, wherein the surfactant is a mixture of nonionic surfactant and anionic surfactant, and the mass ratio of the nonionic surfactant to the anionic surfactant is 5:1. the anionic surfactant is fatty acid methyl ester ethoxylated sodium sulfonate, the HLB of the fatty acid methyl ester ethoxylated sodium sulfonate is 12.5, the fatty acid methyl ester ethoxylated sodium sulfonate is purchased from Jinhui environmental protection technology Co., dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Jiangsu province sea-ampere petrochemical plant, model: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from sea-ampere petrochemical plant in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology Co., ltd, and has the product number of: m828055. The lubricant is sodium chloride.

Example 3

In order to solve the technical problem, the first aspect of the present embodiment provides a high-stability methanol gasoline, wherein the preparation raw materials include, by weight, 80 parts of base oil, 50 parts of methanol, 10 parts of cosolvent, 5 parts of corrosion inhibitor, 1 part of antiknock agent and 40 parts of auxiliary agent. The base oil comprises No. 93 gasoline, no. 120 solvent oil and industrial petroleum ether, and the weight ratio of the base oil is 1:2:1, the industrial petroleum ether is purchased from Shandong Xin chemical industry Co., ltd, and the CAS number is: 133-1-51. The cosolvent is a mixture of n-decyl alcohol and isodecyl alcohol, and the mass ratio between the n-decyl alcohol and the isodecyl alcohol is 1:3. the corrosion inhibitor is polyetheramine, the weight average molecular weight of the polyetheramine is 400, and the polyetheramine is purchased from Aite (Shandong) New Material Co., ltd., CAS number: 9046-10-0. The antiknock agent is lithium ethoxide purchased from the wuhan kemi biotechnology pharmaceutical technology company, CAS number: 2388-07-0. The auxiliary agent comprises 30 parts of surfactant, 4 parts of antistatic agent, 3 parts of antioxidant and 3 parts of lubricant, wherein the surfactant is a mixture of nonionic surfactant and anionic surfactant, and the mass ratio of the nonionic surfactant to the anionic surfactant is 5:1. the anionic surfactant is fatty acid methyl ester ethoxylated sodium sulfonate, the HLB of the fatty acid methyl ester ethoxylated sodium sulfonate is 12.5, the fatty acid methyl ester ethoxylated sodium sulfonate is purchased from Jinhui environmental protection technology Co., dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Jiangsu province sea-ampere petrochemical plant, model: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from sea-ampere petrochemical plant in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology Co., ltd, and has the product number of: m828055. The lubricant is sodium chloride.

Example 4

The base oil comprises No. 93 gasoline, no. 120 solvent oil and industrial petroleum ether, and the weight ratio of the base oil is 1:2:1, the industrial petroleum ether is purchased from Shandong Xin chemical industry Co., ltd, and the CAS number is: 133-1-51. The cosolvent is a mixture of n-decyl alcohol and isodecyl alcohol, and the mass ratio between the n-decyl alcohol and the isodecyl alcohol is 1:5. the corrosion inhibitor is polyetheramine, the weight average molecular weight of the polyetheramine is 400, and the polyetheramine is purchased from Aite (Shandong) New Material Co., ltd., CAS number: 9046-10-0. The antiknock agent is lithium ethoxide purchased from the wuhan kemi biotechnology pharmaceutical technology company, CAS number: 2388-07-0. The auxiliary agent is a surfactant, an antistatic agent, an antioxidant and a lubricant, wherein the surfactant is 18 parts, the antistatic agent is 1 part, the antioxidant is 0.5 part and the lubricant is 0.5 part, the surfactant is a mixture of a nonionic surfactant and an anionic surfactant, and the mass ratio of the nonionic surfactant to the anionic surfactant is 5:1. the anionic surfactant is fatty acid methyl ester ethoxylated sodium sulfonate, the HLB of the fatty acid methyl ester ethoxylated sodium sulfonate is 12.5, the fatty acid methyl ester ethoxylated sodium sulfonate is purchased from Jinhui environmental protection technology Co., dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Jiangsu province sea-ampere petrochemical plant, model: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from sea-ampere petrochemical plant in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology Co., ltd, and has the product number of: m828055. The lubricant is sodium chloride.

Example 5

The base oil comprises No. 93 gasoline, no. 120 solvent oil and industrial petroleum ether, and the weight ratio of the base oil is 1:2:1, the industrial petroleum ether is purchased from Shandong Xin chemical industry Co., ltd, and the CAS number is: 133-1-51. The cosolvent is a mixture of n-decyl alcohol and isodecyl alcohol, and the mass ratio between the n-decyl alcohol and the isodecyl alcohol is 1:10. the corrosion inhibitor is polyetheramine, the weight average molecular weight of the polyetheramine is 400, and the polyetheramine is purchased from Aite (Shandong) New Material Co., ltd., CAS number: 9046-10-0. The antiknock agent is lithium ethoxide purchased from the wuhan kemi biotechnology pharmaceutical technology company, CAS number: 2388-07-0. The auxiliary agent is a surfactant, an antistatic agent, an antioxidant and a lubricant, wherein the surfactant is 18 parts, the antistatic agent is 1 part, the antioxidant is 0.5 part and the lubricant is 0.5 part, the surfactant is a mixture of a nonionic surfactant and an anionic surfactant, and the mass ratio of the nonionic surfactant to the anionic surfactant is 5:1. the anionic surfactant is fatty acid methyl ester ethoxylated sodium sulfonate, the HLB of the fatty acid methyl ester ethoxylated sodium sulfonate is 12.5, the fatty acid methyl ester ethoxylated sodium sulfonate is purchased from Jinhui environmental protection technology Co., dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Jiangsu province sea-ampere petrochemical plant, model: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from sea-ampere petrochemical plant in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology Co., ltd, and has the product number of: m828055. The lubricant is sodium chloride.

Example 6

The base oil comprises No. 93 gasoline, no. 120 solvent oil and industrial petroleum ether, and the weight ratio of the base oil is 1:2:1, the industrial petroleum ether is purchased from Shandong Xin chemical industry Co., ltd, and the CAS number is: 133-1-51. The cosolvent is isopropanol. The corrosion inhibitor is polyetheramine, the weight average molecular weight of the polyetheramine is 400, and the polyetheramine is purchased from Aite (Shandong) New Material Co., ltd., CAS number: 9046-10-0. The antiknock agent is lithium ethoxide purchased from the wuhan kemi biotechnology pharmaceutical technology company, CAS number: 2388-07-0. The auxiliary agent is a surfactant, an antistatic agent, an antioxidant and a lubricant, wherein the surfactant is 18 parts, the antistatic agent is 1 part, the antioxidant is 0.5 part and the lubricant is 0.5 part, the surfactant is a mixture of a nonionic surfactant and an anionic surfactant, and the mass ratio of the nonionic surfactant to the anionic surfactant is 5:1. the anionic surfactant is fatty acid methyl ester ethoxylated sodium sulfonate, the HLB of the fatty acid methyl ester ethoxylated sodium sulfonate is 12.5, the fatty acid methyl ester ethoxylated sodium sulfonate is purchased from Jinhui environmental protection technology Co., dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Jiangsu province sea-ampere petrochemical plant, model: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from sea-ampere petrochemical plant in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology Co., ltd, and has the product number of: m828055. The lubricant is sodium chloride.

Example 7

The base oil comprises No. 93 gasoline, no. 120 solvent oil and industrial petroleum ether, and the weight ratio of the base oil is 1:2:1, the industrial petroleum ether is purchased from Shandong Xin chemical industry Co., ltd, and the CAS number is: 133-1-51. The cosolvent is a mixture of n-decyl alcohol and isodecyl alcohol, and the mass ratio between the n-decyl alcohol and the isodecyl alcohol is 1:3. the corrosion inhibitor is polyetheramine, the weight average molecular weight of the polyetheramine is 230, and the polyetheramine is purchased from Aite (Shandong) New Material Co., ltd., CAS number: 9046-10-0. The antiknock agent is lithium ethoxide purchased from the wuhan kemi biotechnology pharmaceutical technology company, CAS number: 2388-07-0. The auxiliary agent is a surfactant, an antistatic agent, an antioxidant and a lubricant, wherein the surfactant is 18 parts, the antistatic agent is 1 part, the antioxidant is 0.5 part and the lubricant is 0.5 part, the surfactant is a mixture of a nonionic surfactant and an anionic surfactant, and the mass ratio of the nonionic surfactant to the anionic surfactant is 5:1. the anionic surfactant is fatty acid methyl ester ethoxylated sodium sulfonate, the HLB of the fatty acid methyl ester ethoxylated sodium sulfonate is 12.5, the fatty acid methyl ester ethoxylated sodium sulfonate is purchased from Jinhui environmental protection technology Co., dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Jiangsu province sea-ampere petrochemical plant, model: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from sea-ampere petrochemical plant in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology Co., ltd, and has the product number of: m828055. The lubricant is sodium chloride.

Example 8

The base oil comprises No. 93 gasoline, no. 120 solvent oil and industrial petroleum ether, and the weight ratio of the base oil is 1:2:1, the industrial petroleum ether is purchased from Shandong Xin chemical industry Co., ltd, and the CAS number is: 133-1-51. The cosolvent is a mixture of n-decyl alcohol and isodecyl alcohol, and the mass ratio between the n-decyl alcohol and the isodecyl alcohol is 1:3. the corrosion inhibitor is polyetheramine, the weight average molecular weight of the polyetheramine is 2000, and the polyetheramine is purchased from Aite (Shandong) New Material Co., ltd., CAS number: 9046-10-0. The antiknock agent is lithium ethoxide purchased from the wuhan kemi biotechnology pharmaceutical technology company, CAS number: 2388-07-0. The auxiliary agent is a surfactant, an antistatic agent, an antioxidant and a lubricant, wherein the surfactant is 18 parts, the antistatic agent is 1 part, the antioxidant is 0.5 part and the lubricant is 0.5 part, the surfactant is a mixture of a nonionic surfactant and an anionic surfactant, and the mass ratio of the nonionic surfactant to the anionic surfactant is 5:1. the anionic surfactant is fatty acid methyl ester ethoxylated sodium sulfonate, the HLB of the fatty acid methyl ester ethoxylated sodium sulfonate is 12.5, the fatty acid methyl ester ethoxylated sodium sulfonate is purchased from Jinhui environmental protection technology Co., dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Jiangsu province sea-ampere petrochemical plant, model: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from sea-ampere petrochemical plant in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology Co., ltd, and has the product number of: m828055. The lubricant is sodium chloride.

Example 9

The base oil comprises No. 93 gasoline, no. 120 solvent oil and industrial petroleum ether, and the weight ratio of the base oil is 1:2:1, the industrial petroleum ether is purchased from Shandong Xin chemical industry Co., ltd, and the CAS number is: 133-1-51. The cosolvent is a mixture of n-decyl alcohol and isodecyl alcohol, and the mass ratio between the n-decyl alcohol and the isodecyl alcohol is 1:3. the corrosion inhibitor is polyetheramine, the weight average molecular weight of the polyetheramine is 400, and the polyetheramine is purchased from Aite (Shandong) New Material Co., ltd., CAS number: 9046-10-0. The antiknock agent is lithium ethoxide purchased from the wuhan kemi biotechnology pharmaceutical technology company, CAS number: 2388-07-0. The auxiliary agent is a surfactant, an antistatic agent, an antioxidant and a lubricant, wherein the surfactant is 18 parts, the antistatic agent is 1 part, the antioxidant is 0.5 part and the lubricant is 0.5 part, the surfactant is a mixture of a nonionic surfactant and an anionic surfactant, and the mass ratio of the nonionic surfactant to the anionic surfactant is 5:1. the anionic surfactant is sodium dodecyl sulfonate, the HLB of the sodium dodecyl sulfonate is 40, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Jiangsu province sea-ampere petrochemical plant, model: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from sea-ampere petrochemical plant in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology Co., ltd, and has the product number of: m828055. The lubricant is sodium chloride.

Example 10

The base oil comprises No. 93 gasoline, no. 120 solvent oil and industrial petroleum ether, and the weight ratio of the base oil is 1:2:1, the industrial petroleum ether is purchased from Shandong Xin chemical industry Co., ltd, and the CAS number is: 133-1-51. The cosolvent is a mixture of n-decyl alcohol and isodecyl alcohol, and the mass ratio between the n-decyl alcohol and the isodecyl alcohol is 1:3. the corrosion inhibitor is polyetheramine, the weight average molecular weight of the polyetheramine is 400, and the polyetheramine is purchased from Aite (Shandong) New Material Co., ltd., CAS number: 9046-10-0. The antiknock agent is lithium ethoxide purchased from the wuhan kemi biotechnology pharmaceutical technology company, CAS number: 2388-07-0. The auxiliary agent comprises 18 parts of surfactant, 1 part of antistatic agent, 0.5 part of antioxidant and 0.5 part of lubricant, wherein the surfactant is a nonionic surfactant, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Jiangsu province sea-ampere petrochemical factory, model: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from sea-ampere petrochemical plant in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology Co., ltd, and has the product number of: m828055. The lubricant is sodium chloride.

Performance testing

Performance test 1

The methanol gasoline of examples 1 to 10 was left in the room temperature (25 ℃) and low temperature (-30 ℃) environments for 48 hours, respectively, and visually examined for delamination, wherein delamination at room temperature (25 ℃) was recorded as failed, delamination at room temperature (25 ℃) was not recorded as failed, delamination at low temperature (-30 ℃) was recorded as failed, and delamination at low temperature (-30 ℃) was recorded as failed.

Performance test II

Adding 1wt% of water into the methanol gasoline of examples 1-10, and oscillating for 5min up and down; the frequency is 5 times/s up and down, then standing is carried out for 48 hours, and the existence of layering phenomenon is observed, wherein the methanol gasoline is not layered, the separation resistance is recorded as qualified, the methanol gasoline is layered, and the separation resistance is recorded as unqualified.

Performance test III

The gasoline prepared in examples 1-10 was used in automobiles, and the carbon deposition index was tested by the original gasoline engine carbon deposition detection method of oellcheck.

	Room temperature stability	Low temperature stability	Resistance to separation	Carbon index
					Example 1	Qualified product	Qualified product	Qualified product	0.01
Example 2	Qualified product	Qualified product	Qualified product	0.01
					Example 3	Qualified product	Qualified product	Qualified product	0.01
Example 4	Qualified product	Qualified product	Qualified product	0.01
					Example 5	Qualified product	Qualified product	Failure to pass	0.08
Example 6	Qualified product	Failure to pass	Failure to pass	0.16
					Example 7	Failure to pass	Failure to pass	Failure to pass	0.18
Example 8	Failure to pass	Failure to pass	Failure to pass	0.20
					Example 9	Qualified product	Failure to pass	Failure to pass	0.13
Example 10	Qualified product	Failure to pass	Failure to pass	0.15

The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to equivalent embodiments without departing from the technical content of the present invention, and any simple modification, equivalent changes and alterations to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. The methanol gasoline with high stability is characterized in that the preparation raw materials at least comprise 40-80 parts by weight of base oil, 20-50 parts by weight of methanol, 1-10 parts by weight of cosolvent, 1-5 parts by weight of corrosion inhibitor, 0.5-1 part by weight of antiknock agent and 20-40 parts by weight of auxiliary agent; the cosolvent comprises alcohols; the alcohols are straight-chain alcohols and branched-chain alcohols; the mass ratio between the linear alcohol and the branched alcohol is 1: (3-5); the straight chain alcohol is n-decyl alcohol, and the branched chain alcohol is isodecyl alcohol; the corrosion inhibitor is polyetheramine; the polyetheramine has a weight average molecular weight of 400.

2. The high stability methanol gasoline of claim 1 wherein the antiknock agent comprises at least ethanol and its derivatives.

3. The high stability methanol gasoline of claim 1 wherein the adjuvant is selected from at least one of surfactants, antistatic agents, antioxidants, and lubricants.

4. A highly stable methanol gasoline according to claim 3, characterized in that the surfactant is a nonionic surfactant and/or an anionic surfactant.

5. The high stability methanol gasoline of claim 4 wherein the surfactant is a mixture of nonionic surfactant and anionic surfactant in a mass ratio of (5-7): 1.

6. a process for the preparation of a high stability methanol gasoline according to any one of claims 1 to 5, characterized in that it comprises at least the steps of: