CN114717028A

CN114717028A - High-stability methanol gasoline and preparation method thereof

Info

Publication number: CN114717028A
Application number: CN202110763559.XA
Authority: CN
Inventors: 杨啟华
Original assignee: Hubei Qinghe New Energy Technology Co ltd
Current assignee: Hubei Xinyuexing Energy Co ltd
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2022-07-08
Anticipated expiration: 2041-07-06
Also published as: CN114717028B

Abstract

The invention belongs to the field of fuel chemical industry, and particularly relates to high-stability methanol gasoline and a preparation method thereof. A high-stability methanol gasoline is prepared from (by weight parts) base oil 40-80, methanol 20-50, cosolvent 1-10, corrosion inhibitor 1-5, antiknock 0.5-1, and assistant 20-40. The inventor adds a certain cosolvent in the methanol gasoline, improves the intermiscibility and stability between the methanol and the gasoline through the cosolvent, enables the methanol gasoline to be kept in a uniform state even after being placed for a long time, and reduces the layering phenomenon of the methanol gasoline. The corrosion resistance of the methanol gasoline to a gasoline engine is reduced by adding a certain corrosion inhibitor, the antiknock performance of the methanol gasoline is improved by adding a certain antiknock agent, the stability of the methanol gasoline is further improved, the cleanness and the stability of the methanol gasoline are improved by adding a certain auxiliary agent, and the use quality of the methanol gasoline is improved.

Description

High-stability methanol gasoline and preparation method thereof

Technical Field

The invention belongs to the 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 major primary energy source in the world, and the essence of current energy shortage is crude oil shortage. The vehicle fuel is the main application field of crude oil and accounts for more than 70 percent of the total consumption of crude oil in the world. 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 stability of the methanol gasoline sold on the market is poor, the corrosion to gasoline engines is serious, the carbon deposition is more, and the use quality of the methanol gasoline is seriously reduced.

The patent with the patent application number of CN201310721981.4 discloses a methanol gasoline additive and a methanol gasoline containing the additive, wherein the preparation raw materials in the methanol gasoline in the technical scheme mainly comprise methanol, toluene, xylene, isobutanol, isopropanol, isoamylol, ethanol, 2, 6-di-tert-butyl-p-cresol antioxidant and antigum inhibitor, N-disalicylidene-1, 2-propyl diamine metal deactivator, polyisobutenyl amide isooctyl ester, calcium petroleum sulfonate, benzotriazol, dimerized linoleic acid, sodium nitrite, alkyl polyglycoside, methyl tert-butyl ether, oleic acid triethanolamine soap and emulsifier, and the methanol gasoline is added with a large amount of additives and cannot keep a good balance state in the aspects of combustion effect and stability.

Patent application No. cn201610553294.x discloses a methanol gasoline, which is prepared from methanol, methylnaphthalene biquinoline quaternary ammonium salt, morpholine derivative, propiolic alcohol and leveling agent, and has relatively good corrosion resistance but relatively poor stability.

Disclosure of Invention

In order to solve the technical problems, the first aspect of the invention provides high-stability methanol gasoline, and the preparation raw materials at least comprise 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 by weight.

As a preferred technical scheme, the cosolvent at least comprises a hydrocarbon and a derivative thereof.

In a preferred embodiment, the hydrocarbon or the derivative thereof contains at least one oxygen atom in the molecule.

As a preferable technical scheme, the hydrocarbon and the derivative thereof are at least one selected from alkanes, alcohols, alcohol ethers, ketones, esters and ethers.

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

In a preferred embodiment, the straight-chain alcohol is n-decanol, and the branched-chain alcohol is isodecanol.

The methanol gasoline contains a certain amount of methanol, the methanol contains hydroxyl with strong polarity, the hydroxyl is easy to form hydrogen bonds with water and is mutually soluble, the methanol gasoline has strong water absorption, water can be automatically absorbed from the air in the process of storing and using the methanol gasoline, the gasoline is a hydrophobic substance, when the water content in the methanol gasoline reaches a certain degree, the oil-water stratification phenomenon can occur, once the phase separation occurs, the methanol gasoline can not be normally used, and the stability of the methanol gasoline can be seriously reduced due to the water absorption of the methanol. The inventor unexpectedly finds 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, and the methanol gasoline has certain water-resistant stability. The water separating resistance is particularly good when the straight-chain alcohol is n-decanol and the branched-chain alcohol is isodecanol. The inventor believes that the possible reason is that the n-decanol and the iso-decanol both have the hydroxyl group of the lipophilic alcohol and the alkyl group of the lipophilic alcohol, and can better relieve the problem of large polarity difference and incompatibility between oil, water and alcohol. In particular, a branched alcohol has a plurality of alkyl chains adsorbed on the oil phase interface, and can improve the compatibility, but when a large amount of branched alcohol is added, the viscosity of the system is increased, and the usability and the cleanliness of the methanol gasoline are reduced.

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

As a preferred technical scheme, the corrosion inhibitor is polyether amine.

As a preferred technical scheme, the weight average molecular weight of the polyether amine is 400.

When in use, the methanol gasoline can cause great influence on the gasoline engine, corrode the gasoline engine and destroy the performance of the engine, thereby reducing the service life of the gasoline engine. The inventor finds that certain polyether amine is added as a corrosion inhibitor, the polyether amine can form an adsorption film on the surface of a gasoline engine, the gasoline engine is prevented from being corroded, the performance of the gasoline engine is protected, the separation resistance of the methanol gasoline can be improved, the stability of the whole methanol gasoline is improved, and the charges generated in the gasoline product can be conducted due to the existence of amino groups, so that the charges can be leaked out in time, and the antistatic property and the safety of the product are improved. The inventors have found that the use of a polyetheramine of a smaller molecular weight or a polyetheramine of a larger molecular weight, although having a better corrosion inhibition property for 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 preferred technical scheme, the antiknock agent is lithium ethoxide.

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

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

As a preferable technical scheme, 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 (5-7): 1.

as a preferable technical solution, the anionic surfactant is a sulfonate surfactant.

As a preferable technical scheme, the HLB of the sulfonate surfactant is 11-13.

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

Because the compatibility between the methanol and the base oil is poor, the inventor adds certain surfactant to increase the compatibility between the methanol and the base oil. When the inventor adds certain anionic surfactant and nonionic surfactant, especially when the HLB of sulfonate anionic surfactant is 11 ~ 13, not only can be better the compatibility between the alcohol oil, but also can improve the cleaning property and antistatic property of the whole gasoline product, the hydrophilic group in the surfactant is tightly adsorbed on the oil-alcohol interface, thereby effectively reducing the surface tension, hindering the Brownian motion between the methanol liquid beads, making the liquid beads not easy to aggregate and grow, and thus improving the intersolubility of methanol and base oil. And the cleanness and the water separation resistance of the gasoline product can be improved by adding the surfactant. The inventor thinks that water and alcohol 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, an oil-water interface is converted into an oil-oil interface, so that the methanol gasoline is not easy to phase separate, micelles formed by the fatty acid sulfonate and the fatty alcohol-polyoxyethylene ether are doped and wound mutually, the formation of the interaction of the micelles is avoided, oil sludge and carbon deposit are prevented from being aggregated and adhered to the surface of a gasoline engine, and meanwhile, the micelles are prevented from being aggregated to form precipitates, so that the storage stability of the whole methanol gasoline is improved.

The second aspect of the present invention provides a method for preparing the methanol gasoline with high stability, which at least comprises the following steps:

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

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

In addition, the starting materials used are all commercially available, unless otherwise specified.

Has the advantages that: the inventor adds a certain cosolvent in the methanol gasoline, improves the intermiscibility and stability of the methanol and the gasoline by the cosolvent, ensures that the methanol gasoline can still keep a uniform state after being placed for a long time, and reduces the layering phenomenon of the methanol gasoline. The corrosion resistance of the methanol gasoline to a gasoline engine is reduced by adding a certain corrosion inhibitor, the antiknock performance of the methanol gasoline is improved by adding a certain antiknock agent, the stability of the methanol gasoline is further improved, the cleanness and the stability of the methanol gasoline are improved by adding a certain auxiliary agent, and the use quality of the methanol gasoline is improved.

Detailed Description

Example 1

In order to solve the above technical problems, a first aspect of this embodiment provides a high-stability methanol gasoline, which comprises, 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 to the industrial petroleum ether is 1: 2: 1, the industrial petroleum ether is purchased from Xin chemical industry Co., Ltd, east Shandong, and the CAS number is as follows: 133-1-51. The cosolvent is a mixture of n-decanol and isodecanol, and the mass ratio of the n-decanol to the isodecanol is 1: 3. the corrosion inhibitor is polyetheramine, the polyetheramine has a weight average molecular weight of 400, and the polyetheramine is obtained from ait (shandong) new materials, inc, CAS No.: 9046-10-0. The antiknock agent is lithium ethoxide, and the lithium ethoxide is purchased from Wuhankemike biotechnology and medicine technology Limited company, CAS No.: 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, 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 anionic surfactant is purchased from Jinhui environmental protection science and technology Limited, Dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Haian petrochemical plants, Jiangsu province, with the types: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from Haian petrochemical plants in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology, Inc., and has the following product number: m828055. The lubricant is sodium chloride.

The second aspect of the present invention provides a method for preparing the methanol gasoline with high stability, comprising the steps of:

(1) adding methanol, cosolvent, corrosion inhibitor, antiknock agent and 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 at 500r/min to obtain the oil-in-water emulsion.

Example 2

In order to solve the above technical problems, a first aspect of this 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 to the industrial petroleum ether is 1: 2: 1, the industrial petroleum ether is purchased from Xin chemical industry Co., Ltd, east Shandong, and the CAS number is as follows: 133-1-51. The cosolvent is a mixture of n-decanol and isodecanol, and the mass ratio of the n-decanol to the isodecanol is 1: 3. the corrosion inhibitor is polyetheramine, the polyetheramine has a weight average molecular weight of 400, and the polyetheramine is available from ait (Shandong) New Material Co., Ltd., CAS No.: 9046-10-0. The antiknock agent is lithium ethoxide, and the lithium ethoxide is purchased from Wuhankemike biotechnology and medicine technology Limited company, CAS No.: 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, 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 anionic surfactant is purchased from Jinhui environmental protection science and technology Limited, Dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Haian petrochemical plants, Jiangsu province, with the types: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from Haian petrochemical plants in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology, Inc., and has the following product number: m828055. The lubricant is sodium chloride.

The second aspect of the present invention provides a method for preparing methanol gasoline with high stability, comprising the steps of:

Example 3

In order to solve the technical problem, a first aspect of this embodiment provides a high-stability methanol gasoline, which comprises, 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 to the industrial petroleum ether is 1: 2: 1, the industrial petroleum ether is purchased from Xin chemical industry Co., Ltd, east Shandong, and the CAS number is as follows: 133-1-51. The cosolvent is a mixture of n-decanol and isodecanol, and the mass ratio of the n-decanol to the isodecanol is 1: 3. the corrosion inhibitor is polyetheramine, the polyetheramine has a weight average molecular weight of 400, and the polyetheramine is obtained from ait (shandong) new materials, inc, CAS No.: 9046-10-0. The antiknock agent is lithium ethoxide, and the lithium ethoxide is purchased from Wuhankemike biotechnology and medicine technology Limited company, CAS No.: 2388-07-0. The auxiliary agent comprises a surfactant, an antistatic agent, an antioxidant and a lubricant, wherein the surfactant is 30 parts, the antistatic agent is 4 parts, the antioxidant is 3 parts and the lubricant is 3 parts, 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 anionic surfactant is purchased from Jinhui environmental protection science and technology limited company, Dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Heian petrochemical plants, Jiangsu province, and the types are as follows: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from Haian petrochemical plants in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology, Inc., and has the following product number: 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 to the industrial petroleum ether is 1: 2: 1, the industrial petroleum ether is purchased from Xin chemical industry Co., Ltd, east Shandong, and the CAS number is as follows: 133-1-51. The cosolvent is a mixture of n-decanol and isodecanol, and the mass ratio of the n-decanol to the isodecanol is 1: 5. the corrosion inhibitor is polyetheramine, the polyetheramine has a weight average molecular weight of 400, and the polyetheramine is available from ait (Shandong) New Material Co., Ltd., CAS No.: 9046-10-0. The antiknock agent is lithium ethoxide, and the lithium ethoxide is purchased from Wuhankemike Biotechnology and medicine technology Limited company, CAS No.: 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, 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 anionic surfactant is purchased from Jinhui environmental protection science and technology Limited, Dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Haian petrochemical plants, Jiangsu province, with the types: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from Haian petrochemical plants in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology, Inc., and has the following product number: 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 to the industrial petroleum ether is 1: 2: 1, the industrial petroleum ether is purchased from Xinxin chemical industry Co., Ltd, Shandong, and has the CAS number: 133-1-51. The cosolvent is a mixture of n-decanol and isodecanol, and the mass ratio of the n-decanol to the isodecanol is 1: 10. the corrosion inhibitor is polyetheramine, the polyetheramine has a weight average molecular weight of 400, and the polyetheramine is available from ait (Shandong) New Material Co., Ltd., CAS No.: 9046-10-0. The antiknock agent is lithium ethoxide, and the lithium ethoxide is purchased from Wuhankemike biotechnology and medicine technology Limited company, CAS No.: 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, 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 anionic surfactant is purchased from Jinhui environmental protection science and technology Limited, Dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Haian petrochemical plants, Jiangsu province, with the types: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from Haian petrochemical plants in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology, Inc., and has the following product number: m828055. The lubricant is sodium chloride.

Example 6

In order to solve the technical problem, a first aspect of this embodiment provides a high-stability methanol gasoline, and 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 to the industrial petroleum ether is 1: 2: 1, the industrial petroleum ether is purchased from Xin chemical industry Co., Ltd, east Shandong, and the CAS number is as follows: 133-1-51. The cosolvent is isopropanol. The corrosion inhibitor is polyetheramine, the polyetheramine has a weight average molecular weight of 400, and the polyetheramine is available from ait (Shandong) New Material Co., Ltd., CAS No.: 9046-10-0. The antiknock agent is lithium ethoxide, and the lithium ethoxide is purchased from Wuhankemike biotechnology and medicine technology Limited company, CAS No.: 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, 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 anionic surfactant is purchased from Jinhui environmental protection science and technology Limited, Dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Haian petrochemical plants, Jiangsu province, with the types: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from Haian petrochemical plants in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Maxin Biochemical technology, Inc. with the product number as follows: 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 to the industrial petroleum ether is 1: 2: 1, the industrial petroleum ether is purchased from Xin chemical industry Co., Ltd, east Shandong, and the CAS number is as follows: 133-1-51. The cosolvent is a mixture of n-decanol and isodecanol, and the mass ratio of the n-decanol to the isodecanol is 1: 3. the corrosion inhibitor is polyetheramine, the polyetheramine has a weight average molecular weight of 230, and the polyetheramine is available from ait (Shandong) New Material Co., Ltd., CAS No.: 9046-10-0. The antiknock agent is lithium ethoxide, and the lithium ethoxide is purchased from Wuhankemike Biotechnology and medicine technology Limited company, CAS No.: 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, 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 anionic surfactant is purchased from Jinhui environmental protection science and technology Limited, Dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Haian petrochemical plants, Jiangsu province, with the types: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from Haian petrochemical plants in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology, Inc., and has the following product number: 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 to the industrial petroleum ether is 1: 2: 1, the industrial petroleum ether is purchased from Xinxin chemical industry Co., Ltd, Shandong, and has the CAS number: 133-1-51. The cosolvent is a mixture of n-decanol and isodecanol, and the mass ratio of the n-decanol to the isodecanol is 1: 3. the corrosion inhibitor is polyetheramine, the polyetheramine has a weight average molecular weight of 2000, and the polyetheramine is obtained from ait (shandong) new materials, inc, CAS No.: 9046-10-0. The antiknock agent is lithium ethoxide, and the lithium ethoxide is purchased from Wuhankemike biotechnology and medicine technology Limited company, CAS No.: 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, 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 anionic surfactant is purchased from Jinhui environmental protection science and technology Limited, Dongguan city, the nonionic surfactant is fatty alcohol polyoxyethylene ether, and the fatty alcohol polyoxyethylene ether is purchased from Haian petrochemical plants, Jiangsu province, with the types: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from Haian petrochemical plants in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology, Inc., and has the following product number: 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 to the industrial petroleum ether is 1: 2: 1, the industrial petroleum ether is purchased from Xinxin chemical industry Co., Ltd, Shandong, and has the CAS number: 133-1-51. The cosolvent is a mixture of n-decanol and isodecanol, and the mass ratio of the n-decanol to the isodecanol is 1: 3. the corrosion inhibitor is polyetheramine, the polyetheramine has a weight average molecular weight of 400, and the polyetheramine is available from ait (Shandong) New Material Co., Ltd., CAS No.: 9046-10-0. The antiknock agent is lithium ethoxide, and the lithium ethoxide is purchased from Wuhankemike biotechnology and medicine technology Limited company, CAS No.: 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, 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 sodium dodecyl sulfate, the HLB of the sodium dodecyl sulfate is 40, the nonionic surfactant is fatty alcohol-polyoxyethylene ether, and the fatty alcohol-polyoxyethylene ether is purchased from Haian petrochemical plants in Jiangsu province, and has the following types: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from Haian petrochemical plants in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Maxin Biochemical technology, Inc. with the product number as follows: 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 to the industrial petroleum ether is 1: 2: 1, the industrial petroleum ether is purchased from Xin chemical industry Co., Ltd, east Shandong, and the CAS number is as follows: 133-1-51. The cosolvent is a mixture of n-decanol and isodecanol, and the mass ratio of the n-decanol to the isodecanol is 1: 3. the corrosion inhibitor is polyetheramine, the polyetheramine has a weight average molecular weight of 400, and the polyetheramine is available from ait (Shandong) New Material Co., Ltd., CAS No.: 9046-10-0. The antiknock agent is lithium ethoxide, and the lithium ethoxide is purchased from Wuhankemike biotechnology and medicine technology Limited company, CAS No.: 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, the surfactant is nonionic surfactant, the nonionic surfactant is fatty alcohol-polyoxyethylene ether, and the fatty alcohol-polyoxyethylene ether is purchased from Haian petrochemical plants in Jiangsu province, and has the following model: AEO-8. The antistatic agent is an antistatic agent T1502, and the antistatic agent T1502 is purchased from Haian petrochemical plants in Jiangsu province. The antioxidant is 4-methoxy o-phenylenediamine, and the 4-methoxy o-phenylenediamine is purchased from Shanghai Michelin Biochemical technology, Inc., and has the following product number: m828055. The lubricant is sodium chloride.

Performance testing

Performance test one

The methanol gasolines of examples 1 to 10 were placed in an environment of room temperature (25 ℃ C.) and low temperature (-30 ℃ C.) for 48 hours, respectively, and visually examined for delamination, wherein delamination at room temperature (25 ℃ C.) was recorded as failing in room temperature stability, delamination at low temperature (-30 ℃ C.) was recorded as failing in low temperature stability, and low temperature stability was recorded as passing in low temperature stability.

Performance test 2

Adding 1 wt% of water into the methanol gasoline of the embodiment 1-10, and shaking up and down for 5 min; the frequency is 5 times/s, then the mixture is kept stand for 48 hours, and the phenomenon of layering is observed, wherein the methanol gasoline is not layered, the anti-separation performance of the methanol gasoline is recorded as qualified, and the anti-separation performance of the methanol gasoline is recorded as unqualified.

Performance test three

The gasoline prepared in examples 1 to 10 was used for automobiles, and its carbon deposition index was measured by using the original carbon deposition detection method for gasoline engines by oelceck.

	Stability at room temperature	Stability at Low temperature	Separation resistance	Carbon deposition index
					Example 1	Qualified	Qualified	Qualified	0.01
Example 2	Qualified	Qualified	Qualified	0.01
					Example 3	Qualified	Qualified	Qualified	0.01
Example 4	Qualified	Qualified	Qualified	0.01
					Example 5	Qualified	Qualified	Fail to be qualified	0.08
Example 6	Qualified	Fail to be qualified	Fail to be qualified	0.16
					Example 7	Fail to be qualified	Fail to be qualified	Fail to be qualified	0.18
Example 8	Fail to be qualified	Fail to be qualified	Fail to be qualified	0.20
					Example 9	Qualified	Fail to be qualified	Fail to be qualified	0.13
Example 10	Qualified	Fail to be qualified	Fail to be qualified	0.15

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may modify or change the technical content of the above disclosure into equivalent embodiments with equivalent changes, but all those simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope 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 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 by weight.

2. The high stability methanol gasoline of claim 1, wherein the co-solvent comprises at least one hydrocarbon and its derivatives.

3. The methanol gasoline with high stability as claimed in any one of claims 1 or 2, wherein the hydrocarbon and its derivative have at least one oxygen atom in the molecule.

4. The methanol gasoline with high stability as claimed in claim 2, wherein the hydrocarbon and its derivatives are selected from at least one of alkanes, alcohols, alcohol ethers, ketones, esters and ethers.

5. The methanol gasoline with high stability as claimed in claim 1, wherein the corrosion inhibitor comprises at least nitrogen.

6. The high-stability methanol gasoline according to claim 1, wherein the antiknock agent comprises at least ethanol and its derivatives.

7. The high-stability methanol gasoline according to claim 1, wherein the auxiliary agent is at least one selected from the group consisting of a surfactant, an antistatic agent, an antioxidant and a lubricant.

8. The high-stability methanol gasoline of claim 7, wherein the surfactant is a nonionic surfactant and/or an anionic surfactant.

9. The high-stability methanol gasoline of claim 7, wherein 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 (5-7): 1.

10. a method for preparing methanol gasoline with high stability according to any one of claims 1 to 9, characterized by comprising at least the steps of:

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