CN113789212B - Environment-friendly biodegradable lubricating oil and preparation process thereof - Google Patents

Environment-friendly biodegradable lubricating oil and preparation process thereof Download PDF

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Publication number
CN113789212B
CN113789212B CN202111201720.0A CN202111201720A CN113789212B CN 113789212 B CN113789212 B CN 113789212B CN 202111201720 A CN202111201720 A CN 202111201720A CN 113789212 B CN113789212 B CN 113789212B
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oil
mass ratio
lubricating oil
base oil
biodegradable lubricating
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CN113789212A (en
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倪彩虹
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Shandong Naibo Lubrication Technology Co ltd
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Shandong Naibo Lubrication Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M109/00—Lubricating compositions characterised by the base-material being a compound of unknown or incompletely defined constitution
    • C10M109/02—Reaction products
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/08—Inorganic acids or salts thereof
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/024—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings having at least two phenol groups but no condensed ring
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/283—Esters of polyhydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/40—Fatty vegetable or animal oils
    • C10M2207/401—Fatty vegetable or animal oils used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/40—Fatty vegetable or animal oils
    • C10M2207/402—Castor oils
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/102—Polyesters
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/068—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings having amino groups bound to polycyclic aromatic ring systems, i.e. systems with three or more condensed rings
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/086—Imides
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
    • C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
    • C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
    • C10M2219/088—Neutral salts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/049—Phosphite
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2225/00—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2225/04—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions obtained by phosphorisation of macromolecualr compounds not containing phosphorus in the monomers
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/08—Resistance to extreme temperature
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/64—Environmental friendly compositions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/74—Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes

Abstract

The invention discloses an environment-friendly biodegradable lubricating oil and a preparation process thereof, wherein the lubricating oil consists of modified base oil, a dispersant, an antioxidant, an antiwear agent, a defoaming agent and a viscosity regulator; wherein, the preparation raw materials of the modified base oil are base oil, a denaturant and carboxylic ester. The environment-friendly biodegradable lubricating oil obtained by the invention has the advantages of safe and harmless production process, low manufacturing cost, wear resistance, evaporation resistance, easy degradation and good oxidation stability.

Description

Environment-friendly biodegradable lubricating oil and preparation process thereof
Technical Field
The invention relates to the technical field of biodegradable lubricating oil, in particular to environment-friendly biodegradable lubricating oil and a preparation process thereof.
Background
Nowadays, people's environmental protection consciousness and crisis consciousness have been greatly improved, and in order to solve the problem of environmental pollution damage caused by permeation, leakage, overflow and improper treatment possibly generated by production, use and subsequent harmless treatment of lubricating oil, related industry practitioners have to solve the problem through technical innovation and modification. Therefore, the environment-friendly lubricating oil with biodegradability will tend to replace the traditional lubricating oil adopted in the prior art. At present, most of lubricating oil on the market has high quality and long service life, but the lubricating oil prepared by the traditional technology is not friendly enough to the ecological environment, often causes huge environmental disasters and is endless. Moreover, although a few environmentally friendly, biodegradable lubricating oils are now available on the market, their performance levels still fall short of the market and consumer needs. The problem to be solved is how to efficiently and safely produce novel environment-friendly degradable lubricating oil which can be naturally degraded, has no obvious reduction of mechanical and physical and chemical properties and can even exceed the traditional technology.
Although cottonseed oil, palm oil and castor oil are common industrial oils which are cheap and easily available, safe, environment-friendly and pollution-free, no technology and related research reports exist in the prior art which can fully utilize cottonseed oil, palm oil and castor oil and apply the cottonseed oil, palm oil and castor oil to biodegradable lubricating oil.
Patent CN107629847A discloses an ecological environment-friendly lubricating oil and its preparation process, which uses vegetable oil, polymethacrylate, high molecular ashless dispersant and graphite nano-powder as raw materials, but the biodegradation rate of the lubricating oil obtained by the method can not meet the current market demand, and the problems of wear resistance, oxidation stability under high-temperature service environment and evaporation loss are not solved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides environment-friendly biodegradable lubricating oil and a preparation process thereof.
Cottonseed oil, palm oil and castor oil are common industrial oil which are cheap, easy to obtain, safe, environment-friendly and pollution-free, but no technology and related research reports exist in the prior art for fully utilizing cottonseed oil, palm oil and castor oil and applying the cottonseed oil, palm oil and castor oil to biodegradable lubricating oil.
In order to solve the technical problems, the invention adopts the technical scheme that:
the environment-friendly biodegradable lubricating oil consists of the following raw materials: modified base oil, a dispersant, an antioxidant, an antiwear agent, a defoaming agent and a viscosity regulator.
As a preferable scheme, the environment-friendly biodegradable lubricating oil is composed of the following raw materials in parts by weight: 90-120 parts of modified base oil, 0.01-0.05 part of dispersant, 0.1-2 parts of antioxidant, 0.5-4 parts of antiwear agent, 0.01-0.03 part of defoaming agent and 1-3.5 parts of viscosity regulator.
The dispersant is succinimide and/or succinic acid ethylene glycol polyester.
As a preferable scheme, the dispersing agent is a mixture of succinimide and succinic acid ethylene glycol polyester in a mass ratio of (1-3) to (1-3).
The antioxidant is N-ethyl-1-naphthylamine and/or 2, 5-diphenyl hydroquinone.
As a preferable scheme, the antioxidant is a mixture of N-ethyl-1-naphthylamine and 2, 5-diphenyl hydroquinone in a mass ratio of (1-3) to (1-3).
The antiwear agent is tris (nonylphenol) phosphite and/or calcium salt of sulfur-based bis (dodecylphenol).
As a preferable scheme, the antiwear agent is a mixture of tris (nonylphenol) phosphite and calcium thiobis (dodecylphenol) salt in a mass ratio of 5: 2.2.
The defoaming agent is ethylene glycol dimethacrylate and/or neopentyl glycol diacrylate.
As a preferable scheme, the defoaming agent is a mixture of ethylene glycol dimethacrylate and neopentyl glycol diacrylate in a mass ratio of (1-6) to (1-6).
In a preferred embodiment, the viscosity modifier is hydroxylamine hydrochloride.
The modified base oil prepared by the specific method of the invention and a mixed system consisting of the adopted specific dispersant, antioxidant, antiwear agent, defoamer and viscosity regulator are coordinated with each other, have good adaptability and compatibility, can fully exert respective corresponding effects and simultaneously have no problem of weakening each other, and all raw materials supplement each other.
The preparation process of the environment-friendly biodegradable lubricating oil comprises the following steps: mixing and homogenizing the modified base oil, the dispersing agent, the antioxidant, the antiwear agent, the antifoaming agent and the viscosity regulator according to a raw material formula to obtain the environment-friendly biodegradable lubricating oil.
As a preferred scheme, the preparation process of the environment-friendly biodegradable lubricating oil comprises the following steps: mixing and homogenizing modified base oil, a dispersing agent, an antioxidant, an antiwear agent, a defoaming agent and a viscosity regulator according to a raw material formula to obtain the environment-friendly biodegradable lubricating oil; the homogenization conditions are that the pressure is 160-180MPa, the temperature is 145-170 ℃, and the time duration is 20-40 min.
The preparation process of the modified base oil comprises the following steps:
f1, mixing the base oil and the sodium acetate aqueous solution, and homogenizing to obtain an intermediate product A;
f2, mixing and stirring the intermediate product A and the water absorbent, centrifuging, and filtering to obtain a liquid phase to obtain an intermediate product B;
f3, mixing the intermediate product B, a denaturant and carboxylic ester to obtain the denatured base oil.
According to the invention, free hydrogen ions in a mixture of cottonseed oil, castor oil and palm oil are sufficiently removed by adopting a sodium acetate aqueous solution through a high-pressure homogenization means, so that the mixture is favorably modified by adopting a specific denaturant in subsequent treatment, and the hydrogen ions can react with hydroxyl in sodium hexahydroxyplatinate; and the homogeneity of the mixed oil phase can be increased by homogenizing acetate and high pressure, so that the reliability of the lubricating oil in service can be enhanced.
As a preferable scheme, the preparation process of the denatured base oil comprises the following steps:
f1, mixing the base oil and 8-13 wt.% sodium acetate aqueous solution according to the mass ratio of 1 (0.5-2), and homogenizing at 70-85 ℃ under the pressure of 45-55MPa for 15-25min to obtain an intermediate product A;
f2, mixing the intermediate product A and the water absorbent in a mass ratio of (6-9):1, stirring at 45-60 ℃ and at the rotation speed of 100-;
f3, mixing the intermediate product B, the denaturant and the carboxylic ester according to the mass ratio of (11-13): (0.5-0.9): 2.2-2.8), and then treating for 70-90min under the conditions of 135-.
The base oil is at least two of cottonseed oil, castor oil and palm oil.
As a preferable scheme, the base oil is a mixture of cottonseed oil, castor oil and palm oil in a mass ratio of (1-7) to (1-6) to (1-5).
As a preferable mode, the water absorbing agent is silica gel.
The invention adopts silica gel to remove the water introduced in the previous step, and simultaneously does not introduce chloride ions which are introduced by a conventional water absorbent, namely anhydrous calcium chloride, and the existence of the chloride ions can weaken the reactivity of the subsequently added octyl phenoxy polyethoxy ethyl phosphate.
The denaturant is octyl phenoxy polyethoxy ethyl phosphate and/or sodium hexahydroxyplatinate.
In a preferable scheme, the denaturant is a mixture of octyl phenoxy polyethoxy ethyl phosphate and sodium hexahydroxyplatinate in a mass ratio of (1-3) to (1-3).
The topological molecular polar surface area and the number of rotatable chemical bonds of the octyl phenoxy polyethoxy ethyl phosphate, the number of hydrogen bond acceptors of sodium hexahydroxyplatinate and the electronegativity of core platinum ions enable the basic oil to change the molecular space configuration under the initiation of the carboxylic ester when the basic oil is compounded as a denaturant of the basic oil, and the change of the microscopic level can lead to the improvement of the macroscopic mechanics and biochemical performance of the lubricating oil: the normal-temperature wear resistance of the lubricating oil is improved, the oxidation resistance and the evaporation resistance of the lubricating oil in a high-temperature environment are improved, and the biodegradation rate is very good.
As a most preferred scheme, the denaturant is a mixture of octyl phenoxy polyethoxy ethyl phosphate and sodium hexahydroxyplatinate in a mass ratio of 2:1.
The carboxylic ester is at least one of bis (2-ethoxyethyl) sebacate, dioctyl azelate and diisooctyl sebacate.
The organic phase wetting power and the bond energy of a carbon-oxygen bond of the bis (2-ethoxyethyl) sebacate, the dioctyl azelate and the diisooctyl sebacate adopted by the invention can reduce the reaction difficulty between the denaturant and the base oil, so that the denatured base oil with more sufficient modification degree can be obtained.
As a preferable scheme, the carboxylic ester is a mixture of bis (2-ethoxyethyl) sebacate, dioctyl azelate and diisooctyl sebacate in a mass ratio of 7:2: 1.3.
The invention has the beneficial effects that:
1. the invention provides environment-friendly biodegradable lubricating oil and a preparation process thereof, and the environment-friendly biodegradable lubricating oil which is wear-resistant, evaporation-resistant, easy to degrade and good in oxidation stability is obtained.
2. The invention provides a base oil capable of being modified and a preparation process thereof, which can be used for preparing biodegradable lubricating oil, wherein octyl phenoxy polyethoxy ethyl phosphate and sodium hexahydroxyplatinate are used as modifying agents, and the molecular space arrangement condition of cottonseed oil, palm oil and castor oil can be changed under the environment of bis (2-ethoxyethyl) sebacate, dioctyl azelate and diisooctyl sebacate, so that better macroscopic mechanical and biochemical properties are obtained.
Detailed Description
The above summary of the present invention is described in further detail below with reference to specific embodiments, but it should not be construed that the scope of the above-described subject matter of the present invention is limited to the following examples.
Some of the raw materials in this application are introduced:
succinimides in the examples, CAS: 123-56-8, source: hubeixin Rundy chemical Co., Ltd.
Ethylene glycol succinate in the examples, CAS: 25569-53-3, source: shanghai Michelle chemical technology, Inc., molecular weight: 8300.
n-ethyl-1-naphthylamine in the examples, CAS: 118-44-5, source: bailingwei Tech Co.
2, 5-diphenylhydroquinone in the examples, CAS: 5422-91-3, sources: hubeixin Rundy chemical Co., Ltd.
Tris (nonylphenol) phosphite in the examples, CAS: 26523-78-4, source: bailingwei Tech Co.
Calcium thiobis (dodecylphenol) salt in the examples, CAS: 26998-97-0, source: hubei Xin Rundchemical Co., Ltd.
Ethylene glycol dimethacrylate in the examples, CAS: 97-90-5, source: tianmen Changchang chemical Co Ltd.
Neopentyl glycol diacrylate in the examples, CAS: 2223-82-7, source: shanghai Michell chemical technology, Inc.
Hydroxylamine hydrochloride in the examples, CAS: 5470-11-1, source: wande chemical Co., Ltd, Hubei.
Cottonseed oil, CAS: 8001-29-4, source: hubei Yunyi technologies, Inc., freezing point: 5 ℃ relative Density (5/15 ℃): 0.925, iodine value: 109, saponification number: 192, according to the GB/T1537-2019.
Castor oil, CAS: 8001-79-4, source: handan Congtue district Zhan chemical trade limited company, which conforms to the GB/T8234-2009 regulations.
Palm oil, CAS: 8002-75-3, source: dengfeng chemical limited, refractive index: 1.455, meets the requirements of GB 15680-.
Silica gel, CAS: 112926-00-8, source: wuhan detailed scientific biotechnology limited, bulk density: 740g/L, specific surface area (mm) 2 /g) is more than or equal to 600, and the function is as follows: and (5) absorbing water.
Octyl phenoxy polyethoxyethyl phosphate in the examples, CAS: 52623-95-7, Source: hubei Shinshun Biotech, Inc., molecular weight: 3700.
sodium hexahydroxyplatinate in the examples, CAS: 12325-31-4, source: hubei Shinshun Biotech Co., Ltd.
Bis (2-ethoxyethyl) sebacate in the examples, CAS: 624-10-2, source: bailingwei Tech Co.
Dioctyl azelate in the examples, CAS: 103-24-2, source: shanghai Michell chemical technology, Inc.
Diisooctyl sebacate in the examples, CAS: 122-62-3, source: shanghai Michell chemical technology, Inc.
Example 1
The environment-friendly biodegradable lubricating oil consists of the following raw materials in parts by weight: 100 parts by weight of modified base oil, 0.02 part by weight of dispersant, 1 part by weight of antioxidant, 3 parts by weight of antiwear agent, 0.01 part by weight of defoaming agent and 2.5 parts by weight of viscosity modifier.
The dispersing agent is a mixture of succinimide and succinic acid ethylene glycol polyester in a mass ratio of 1: 1.
The antioxidant is a mixture of N-ethyl-1-naphthylamine and 2, 5-diphenyl hydroquinone in a mass ratio of 3: 2.
The antiwear agent is a mixture of tris (nonylphenol) phosphite and calcium thiobis (dodecylphenol) salt in a mass ratio of 5: 2.2.
The defoaming agent is a mixture of ethylene glycol dimethacrylate and neopentyl glycol diacrylate in a mass ratio of 5: 1.
The viscosity regulator is hydroxylamine hydrochloride.
The preparation process of the environment-friendly biodegradable lubricating oil comprises the following steps: mixing and homogenizing modified base oil, a dispersing agent, an antioxidant, an antiwear agent, a defoaming agent and a viscosity regulator according to a raw material formula to obtain the environment-friendly biodegradable lubricating oil; the homogenization conditions are that the pressure is 175MPa, the temperature is 150 ℃, and the time duration is 25 min.
The preparation process of the modified base oil comprises the following steps:
f1, mixing the base oil and a 12wt.% sodium acetate aqueous solution according to the mass ratio of 1:1, and homogenizing at 80 ℃ under the pressure of 50MPa for 20min to obtain an intermediate product A;
f2, mixing the intermediate product A and the water absorbent in a mass ratio of 7:1, stirring at 50 ℃ for 40min at a rotating speed of 200rpm, then centrifuging at a rotating speed of 10000rpm for 3min, and filtering to obtain a liquid phase to obtain an intermediate product B;
f3, mixing the intermediate product B, the denaturant and the carboxylic ester according to the mass ratio of 12:0.7:2.7, and then treating for 80min at the conditions of 150 ℃, the pressure of 200MPa and the rotating speed of 50rpm to obtain the denatured base oil.
The base oil is a mixture of cottonseed oil, castor oil and palm oil in a mass ratio of 4:1: 1.
The water absorbent is silica gel.
The denaturant is a mixture composed of octyl phenoxy polyethoxy ethyl phosphate and sodium hexahydroxyplatinate in a mass ratio of 2:1.
The carboxylic ester is a mixture of bis (2-ethoxyethyl) sebacate, dioctyl azelate and diisooctyl sebacate in a mass ratio of 7:2: 1.3.
Example 2
Essentially the same as in example 1, except that:
the preparation process of the modified base oil comprises the following steps:
f1, mixing the base oil and a 12wt.% sodium acetate aqueous solution in a mass ratio of 1:1, and homogenizing at 80 ℃ under a pressure of 50MPa for 20min to obtain an intermediate product A;
f2, mixing the intermediate product A and the water absorbent in a mass ratio of 7:1, stirring at 50 ℃ for 40min at a rotating speed of 200rpm, then centrifuging at a rotating speed of 10000rpm for 3min, and filtering to obtain a liquid phase to obtain an intermediate product B;
f3, mixing the intermediate product B, the denaturant and the carboxylic ester according to the mass ratio of 12:0.7:2.7, and then treating for 80min under the conditions of 150 ℃, 200MPa of pressure and 50rpm of rotating speed to obtain the denatured base oil.
The base oil is a mixture of cottonseed oil, castor oil and palm oil in a mass ratio of 4:1: 1.
The water absorbent is silica gel.
The denaturant is octyl phenoxy polyethoxy ethyl phosphate.
The carboxylic ester is a mixture of bis (2-ethoxyethyl) sebacate, dioctyl azelate and diisooctyl sebacate in a mass ratio of 7:2: 1.3.
Example 3
Essentially the same as in example 1, except that:
the preparation process of the modified base oil comprises the following steps:
f1, mixing the base oil and a 12wt.% sodium acetate aqueous solution in a mass ratio of 1:1, and homogenizing at 80 ℃ under a pressure of 50MPa for 20min to obtain an intermediate product A;
f2, mixing the intermediate product A and the water absorbent in a mass ratio of 7:1, stirring at 50 ℃ for 40min at a rotating speed of 200rpm, then centrifuging at a rotating speed of 10000rpm for 3min, and filtering to obtain a liquid phase to obtain an intermediate product B;
f3, mixing the intermediate product B, the denaturant and the carboxylic ester according to the mass ratio of 12:0.7:2.7, and then treating for 80min at the conditions of 150 ℃, the pressure of 200MPa and the rotating speed of 50rpm to obtain the denatured base oil.
The base oil is a mixture of cottonseed oil, castor oil and palm oil in a mass ratio of 4:1: 1.
The water absorbent is silica gel.
The denaturant is sodium hexahydroxyplatinate.
The carboxylic ester is a mixture of bis (2-ethoxyethyl) sebacate, dioctyl azelate and diisooctyl sebacate in a mass ratio of 7:2: 1.3.
Example 4
Essentially the same as in example 1, except that:
the preparation process of the modified base oil comprises the following steps:
f1, mixing the base oil and a 12wt.% sodium acetate aqueous solution in a mass ratio of 1:1, and homogenizing at 80 ℃ under a pressure of 50MPa for 20min to obtain an intermediate product A;
f2, mixing the intermediate product A and the water absorbent in a mass ratio of 7:1, stirring at 50 ℃ for 40min at a rotating speed of 200rpm, then centrifuging at a rotating speed of 10000rpm for 3min, and filtering to obtain a liquid phase to obtain an intermediate product B;
f3, mixing the intermediate product B and the carboxylic ester according to the mass ratio of 12:2.7, and then treating for 80min at the conditions of 150 ℃, the pressure of 200MPa and the rotating speed of 50rpm to obtain the denatured base oil.
The base oil is a mixture of cottonseed oil, castor oil and palm oil in a mass ratio of 4:1: 1.
The water absorbent is silica gel.
The carboxylic ester is a mixture of bis (2-ethoxyethyl) sebacate, dioctyl azelate and diisooctyl sebacate in a mass ratio of 7:2: 1.3.
Example 5
Essentially the same as in example 1, except that:
the preparation process of the modified base oil comprises the following steps:
f1, mixing the base oil and a 12wt.% sodium acetate aqueous solution in a mass ratio of 1:1, and homogenizing at 80 ℃ under a pressure of 50MPa for 20min to obtain an intermediate product A;
f2, mixing the intermediate product A and the water absorbent in a mass ratio of 7:1, stirring at 50 ℃ for 40min at a rotating speed of 200rpm, then centrifuging at a rotating speed of 10000rpm for 3min, and filtering to obtain a liquid phase to obtain an intermediate product B;
f3 mixing the intermediate product B and the denaturant according to the mass ratio of 12:0.7, and then treating for 80min at the conditions of 150 ℃, the pressure of 200MPa and the rotating speed of 50rpm to obtain the denatured base oil.
The base oil is a mixture of cottonseed oil, castor oil and palm oil in a mass ratio of 4:1: 1.
The water absorbent is silica gel.
The denaturant is a mixture of octyl phenoxy polyethoxy ethyl phosphate and sodium hexahydroxyplatinate in a mass ratio of 2:1.
Example 6
Essentially the same as in example 1, except that:
the preparation process of the modified base oil comprises the following steps:
f1, mixing the base oil and a 12wt.% sodium acetate aqueous solution in a mass ratio of 1:1, and homogenizing at 80 ℃ under a pressure of 50MPa for 20min to obtain an intermediate product A;
f2, mixing the intermediate product A and the water absorbent in a mass ratio of 7:1, stirring at 50 ℃ for 40min at a rotating speed of 200rpm, then centrifuging at a rotating speed of 10000rpm for 3min, and filtering to obtain a liquid phase to obtain an intermediate product B;
f3, mixing the intermediate product B, the denaturant and the carboxylic ester according to the mass ratio of 12:0.7:2.7, and then treating for 80min under the conditions of 150 ℃, 200MPa of pressure and 50rpm of rotating speed to obtain the denatured base oil.
The base oil is a mixture of cottonseed oil, castor oil and palm oil in a mass ratio of 4:1: 1.
The water absorbent is anhydrous calcium chloride.
The denaturant is a mixture composed of octyl phenoxy polyethoxy ethyl phosphate and sodium hexahydroxyplatinate in a mass ratio of 2:1.
The carboxylic ester is a mixture of bis (2-ethoxyethyl) sebacate, dioctyl azelate and diisooctyl sebacate in a mass ratio of 7:2: 1.3.
Example 7
Essentially the same as in example 1, except that:
the preparation process of the modified base oil comprises the following steps:
f1, mixing the base oil and water in a mass ratio of 1:1, and homogenizing at 80 ℃ under the pressure of 50MPa for 20min to obtain an intermediate product A;
f2 mixing the intermediate product A and the water absorbent in a mass ratio of 7:1, stirring at 50 ℃ for 40min at a rotating speed of 200rpm, then centrifuging at a rotating speed of 10000rpm for 3min, and filtering to obtain a liquid phase to obtain an intermediate product B;
f3, mixing the intermediate product B, the denaturant and the carboxylic ester according to the mass ratio of 12:0.7:2.7, and then treating for 80min at the conditions of 150 ℃, the pressure of 200MPa and the rotating speed of 50rpm to obtain the denatured base oil.
The base oil is a mixture of cottonseed oil, castor oil and palm oil in a mass ratio of 4:1: 1.
The water absorbent is silica gel.
The denaturant is a mixture composed of octyl phenoxy polyethoxy ethyl phosphate and sodium hexahydroxyplatinate in a mass ratio of 2:1.
The carboxylic ester is a mixture of bis (2-ethoxyethyl) sebacate, dioctyl azelate and diisooctyl sebacate in a mass ratio of 7:2: 1.3.
Example 8
The environment-friendly biodegradable lubricating oil consists of the following raw materials in parts by weight: 100 parts by weight of base oil, 0.02 part by weight of dispersant, 1 part by weight of antioxidant, 3 parts by weight of antiwear agent, 0.01 part by weight of defoaming agent and 2.5 parts by weight of viscosity modifier.
The base oil is a mixture of cottonseed oil, castor oil and palm oil in a mass ratio of 4:1: 1.
The dispersing agent is a mixture of succinimide and succinic acid ethylene glycol polyester in a mass ratio of 1: 1.
The antioxidant is a mixture of N-ethyl-1-naphthylamine and 2, 5-diphenyl hydroquinone in a mass ratio of 3: 2.
The antiwear agent is a mixture of tris (nonylphenol) phosphite and calcium thiobis (dodecylphenol) salt in a mass ratio of 5: 2.2.
The defoaming agent is a mixture of ethylene glycol dimethacrylate and neopentyl glycol diacrylate in a mass ratio of 5: 1.
The viscosity regulator is hydroxylamine hydrochloride.
The preparation process of the environment-friendly biodegradable lubricating oil comprises the following steps: mixing and homogenizing base oil, a dispersing agent, an antioxidant, an antiwear agent, a defoaming agent and a viscosity regulator according to a raw material formula to obtain the environment-friendly biodegradable lubricating oil; the homogenization conditions are that the pressure is 175MPa, the temperature is 150 ℃, and the time duration is 25 min.
Example 9
Essentially the same as in example 1, except that:
the preparation process of the modified base oil comprises the following steps:
f1, mixing the base oil and a 12wt.% sodium acetate aqueous solution in a mass ratio of 1:1, and carrying out ultrasonic treatment at 80 ℃ and a power of 380W and a frequency of 45kHz for 20min to obtain an intermediate product A;
f2, mixing the intermediate product A and the water absorbent in a mass ratio of 7:1, stirring at 50 ℃ for 40min at a rotating speed of 200rpm, then centrifuging at a rotating speed of 10000rpm for 3min, and filtering to obtain a liquid phase to obtain an intermediate product B;
f3, mixing the intermediate product B, the denaturant and the carboxylic ester according to the mass ratio of 12:0.7:2.7, and then treating for 80min under the conditions of 150 ℃, 200MPa of pressure and 50rpm of rotating speed to obtain the denatured base oil.
The base oil is a mixture of cottonseed oil, castor oil and palm oil in a mass ratio of 4:1: 1.
The water absorbent is silica gel.
The denaturant is a mixture composed of octyl phenoxy polyethoxy ethyl phosphate and sodium hexahydroxyplatinate in a mass ratio of 2:1.
The carboxylic ester is a mixture of bis (2-ethoxyethyl) sebacate, dioctyl azelate and diisooctyl sebacate in a mass ratio of 7:2: 1.3.
Test example 1
And (3) testing the abrasion resistance: the abrasion resistance of the environment-friendly biodegradable lubricating oil obtained by each example of the invention is determined according to NB/SH/T0189-. The tightening torque is 50 N.m; the test oil is poured into the oil box and exceeds the top of the steel ball by 5 mm. Using condition B as test condition: the temperature was 75 ℃, the speed 1200r/min, the time 60min and the load 392N.
The test results are shown in table 1.
TABLE 1 antiwear Properties of environmentally friendly biodegradable lubricating oils
Figure BDA0003305116950000121
Test example 2
And (3) testing oxidation stability: the oxidation stability of the environmentally friendly biodegradable lubricating oil obtained in each example of the present invention was measured according to SH/T0193-2008 "method for measuring Oxidation stability of lubricating oil by rotating oxygen bomb". The outer diameter of the copper wire coil used in the experiment is 45mm, the mass is 55.6g, and the extension height is 40 mm.
The test results are shown in table 2.
TABLE 2 Oxidation stability of environmentally friendly biodegradable lubricating oils
Figure BDA0003305116950000131
Test example 3
Evaporation loss test: the evaporation loss value of the environmentally-friendly biodegradable lubricating oil obtained by each example of the invention is determined according to the method A in NB/SH/T0059-. The experimental temperature was 250 ℃ and the experimental duration was 1 h.
The test results are shown in table 3.
TABLE 3 Evaporation loss values for environmentally friendly biodegradable lubricating oils
Figure BDA0003305116950000132
Figure BDA0003305116950000141
Test example 4
Biodegradability test: the biodegradability of the environmentally-friendly biodegradable lubricating oil obtained in each example of the invention is determined according to GB/T21856-2008 "test for producing carbon dioxide by rapid biodegradability of chemicals". Carbon dioxide was measured every day 10 days before the test and every 5 days after the test, for a total test period of 28 days.
The test results are shown in table 4.
TABLE 4 biodegradability of environmentally friendly biodegradable lubricating oils
Figure BDA0003305116950000142
According to the invention, free hydrogen ions in a mixture of cottonseed oil, castor oil and palm oil are sufficiently removed by adopting a sodium acetate aqueous solution through a high-pressure homogenization means, so that the mixture is favorably modified by adopting a specific denaturant in subsequent treatment, and the hydrogen ions can react with hydroxyl in sodium hexahydroxyplatinate; and the homogeneity of the mixed oil phase can be increased by homogenizing acetate and high pressure, so that the reliability of the lubricating oil in service can be enhanced. The invention adopts silica gel to remove the water introduced in the previous step, and simultaneously does not introduce chloride ions which are introduced by a conventional water absorbent, namely anhydrous calcium chloride, and the existence of the chloride ions can weaken the reactivity of the subsequently added octyl phenoxy polyethoxy ethyl phosphate. The topological molecular polar surface area and the number of rotatable chemical bonds of the octyl phenoxy polyethoxy ethyl phosphate, the number of hydrogen bond acceptors of sodium hexahydroxyplatinate and the electronegativity of core platinum ions enable the topological molecular polar surface area and the number of rotatable chemical bonds, the hydrogen bond acceptors of sodium hexahydroxyplatinate and the electronegativity of core platinum ions to change the molecular spatial configuration of the base oil under the initiation of the carboxylic ester when the octyl phenoxy polyethoxy ethyl phosphate is compounded as a denaturant of the base oil, and the change of the microscopic level can lead to the improvement of the macroscopic mechanical and biochemical properties of the lubricating oil: the normal-temperature wear resistance of the lubricating oil is improved, the oxidation resistance and the evaporation resistance of the lubricating oil in a high-temperature environment are improved, and the biodegradation rate is very good. The organic phase wetting power and the bond energy of a carbon-oxygen bond of the bis (2-ethoxyethyl) sebacate, the dioctyl azelate and the diisooctyl sebacate adopted by the invention can reduce the reaction difficulty between the denaturant and the base oil, so that the denatured base oil with more sufficient modification degree can be obtained.
The modified base oil prepared by the specific method of the invention is coordinated with a mixed system consisting of the specific dispersant, the antioxidant, the antiwear agent, the defoamer and the viscosity regulator, has good adaptability and compatibility, can fully exert respective corresponding effects and simultaneously has no weakening problem, and all the raw materials supplement each other.

Claims (8)

1. The environment-friendly biodegradable lubricating oil is characterized by comprising the following raw materials: modified base oil, a dispersant, an antioxidant, an antiwear agent, a defoaming agent and a viscosity regulator;
the preparation process of the modified base oil comprises the following steps:
f1, mixing the base oil and the sodium acetate aqueous solution, and homogenizing to obtain an intermediate product A;
f2, mixing and stirring the intermediate product A and the water absorbent, centrifuging, and filtering to obtain a liquid phase to obtain an intermediate product B;
f3, mixing the intermediate product B, a denaturant and carboxylic ester to obtain denatured base oil;
the denaturant is a mixture consisting of octyl phenoxy polyethoxy ethyl phosphate and sodium hexahydroxyplatinate in a mass ratio of (1-3) to (1-3);
the base oil is at least two of cottonseed oil, castor oil and palm oil.
2. The environmentally friendly biodegradable lubricating oil of claim 1, wherein: the dispersant is succinimide and/or succinic acid ethylene glycol polyester.
3. The environmentally friendly biodegradable lubricating oil according to claim 1, wherein: the antioxidant is N-ethyl-1-naphthylamine and/or 2, 5-diphenyl hydroquinone.
4. The environmentally friendly biodegradable lubricating oil of claim 1, wherein: the antiwear agent is tris (nonylphenol) phosphite and/or calcium salt of sulfur-based bis (dodecylphenol).
5. The environmentally friendly biodegradable lubricating oil according to claim 1, wherein: the defoaming agent is ethylene glycol dimethacrylate and/or neopentyl glycol diacrylate.
6. The environmentally friendly biodegradable lubricating oil of claim 1, wherein: the carboxylic ester is at least one of bis (2-ethoxyethyl) sebacate, dioctyl azelate and diisooctyl sebacate.
7. The environmentally friendly biodegradable lubricating oil of claim 1, wherein: the environment-friendly biodegradable lubricating oil consists of the following raw materials in parts by weight: 100 parts by weight of modified base oil, 0.02 part by weight of dispersant, 1 part by weight of antioxidant, 3 parts by weight of antiwear agent, 0.01 part by weight of defoaming agent and 2.5 parts by weight of viscosity regulator;
the dispersing agent is a mixture of succinimide and succinic acid ethylene glycol polyester in a mass ratio of 1: 1;
the antioxidant is a mixture of N-ethyl-1-naphthylamine and 2, 5-diphenyl hydroquinone in a mass ratio of 3: 2;
the antiwear agent is a mixture of tris (nonylphenol) phosphite ester and calcium sulfenyl bis (dodecylphenol) salt in a mass ratio of 5: 2.2;
the defoaming agent is a mixture of ethylene glycol dimethacrylate and neopentyl glycol diacrylate in a mass ratio of 5: 1;
the viscosity regulator is hydroxylamine hydrochloride;
the preparation process of the environment-friendly biodegradable lubricating oil comprises the following steps: mixing and homogenizing modified base oil, a dispersing agent, an antioxidant, an antiwear agent, a defoaming agent and a viscosity regulator according to a raw material formula to obtain the environment-friendly biodegradable lubricating oil; the homogenizing condition is that the pressure is 175MPa, the temperature is 150 ℃, and the duration is 25 min;
the preparation process of the modified base oil comprises the following steps:
f1, mixing the base oil and a 12wt.% sodium acetate aqueous solution in a mass ratio of 1:1, and homogenizing at 80 ℃ under a pressure of 50MPa for 20min to obtain an intermediate product A;
f2, mixing the intermediate product A and the water absorbent in a mass ratio of 7:1, stirring at 50 ℃ for 40min at a rotating speed of 200rpm, then centrifuging at a rotating speed of 10000rpm for 3min, and filtering to obtain a liquid phase to obtain an intermediate product B;
f3, mixing the intermediate product B, the denaturant and the carboxylic ester according to the mass ratio of 12:0.7:2.7, and then treating for 80min under the conditions of 150 ℃, 200MPa of pressure and 50rpm of rotating speed to obtain denatured base oil;
the base oil is a mixture of cottonseed oil, castor oil and palm oil in a mass ratio of 4:1: 1;
the water absorbent is silica gel;
the denaturant is a mixture composed of octyl phenoxy polyethoxy ethyl phosphate and sodium hexahydroxyplatinate in a mass ratio of 2: 1;
the carboxylic ester is a mixture of bis (2-ethoxyethyl) sebacate, dioctyl azelate and diisooctyl sebacate in a mass ratio of 7:2: 1.3.
8. The preparation process of the environment-friendly biodegradable lubricating oil is characterized in that the environment-friendly biodegradable lubricating oil is obtained by mixing and homogenizing modified base oil, a dispersing agent, an antioxidant, an antiwear agent, a defoaming agent and a viscosity regulator according to a raw material formula, wherein the environment-friendly biodegradable lubricating oil is prepared by the steps of claims 1 to 7.
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