CN102911780B - Treating method for lubrication oleic acid values - Google Patents
Treating method for lubrication oleic acid values Download PDFInfo
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- CN102911780B CN102911780B CN201210418526.2A CN201210418526A CN102911780B CN 102911780 B CN102911780 B CN 102911780B CN 201210418526 A CN201210418526 A CN 201210418526A CN 102911780 B CN102911780 B CN 102911780B
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Abstract
The invention provides a treating method for lubrication oleic acid values. The treating method includes the step of reacting 80-99.99% by weight of sample lubricating oil with 0.1-20% by weight of acid value treating agent to obtain lubricating oil with an acid value lower than 0.03mgKOH/g. The sample lubricating oil is the lubricating oil containing additive or base lubricating oil. The acid value treating agent is epoxide or organic amine compound. The acid value treating agent and organic acid in the sample lubricating oil undergo ring-opening reaction to form ester, organic amine and the organic acid undergo neutral reaction to form amine salt or undergo addition reaction to form derivative of urea, thereby the organic acid is consumed, and the purpose for lowering the acid value is reached. By the treating method, not only the acid value in the sample lubricating oil can be lowered, also oil loss is less. In addition, the adopted acid value treating agent is non-corrosive, easy to filter and pollution-free.
Description
Technical field
The present invention relates to lubricating oil process field, particularly relate to a kind of processing method of acid value of lubricating oil.
Background technology
Lubricating oil is the not volatile oily lubricant of one, be generally the product of fractionation oil, also has to refine from vegetable and animals oils.Lubricating oil can be divided into animal and vegetable oil by its source, petroleum oil and synthetic lubricant fluid three major types.The consumption of petroleum oil accounts for total consumption more than 97%, and therefore lubricating oil often refers to petroleum oil.Lubricating oil is made up of base oil and additive two parts, and base oil is lubrication main body of oil, and decide the basic character of lubricating oil, additive can make up and improve the deficiency of base oil aspect of performance, is the important component part of lubricating oil.Lubricating oil is mainly used in reducing the friction between moving component surface, machinery equipment is had to cooling, sealing, anticorrosion, antirust, insulation, power transmission, cleans the effects such as impurity simultaneously.Its mainly with from the lube cut of crude(oil)unit and residue oil fraction for raw material.
The acid number of lubricating oil is the quality index representing organic acid total content in lubricating oil.In and potassium hydroxide milligram number needed for 1g oil product be called acid number.The size of acid value of lubricating oil, has a significant impact the use of lubricating oil.Acid value of lubricating oil is large, and represent that the organic acid content of lubricating oil is high, likely cause corrosion to machine components, when especially having water to exist, this corrosiveness may be more obvious.Lubricating oil is oxidized rotten in storage and use procedure in addition, and acid number also increases gradually, and the size of conventional acid number change weighs oil ageing stability, or as criteria for changing oil.
When acid value of lubricating oil is higher need to reduce acid number time, the general way adding solid base that adopts carries out neutralization reaction, then solids removed by filtration alkali, thus reduces lubricating oil organic acid content, reduces the acid number of lubricating oil.But, solid base add membership and lubricating oil generation side reaction, oil product loss is comparatively large, and filter process is complicated.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is the processing method providing a kind of acid value of lubricating oil, effectively can reduce acid value of lubricating oil, and oil product loss is little.
The invention discloses a kind of processing method of acid value of lubricating oil, comprising:
Sample lubricating oil and acid number inorganic agent are reacted, obtains finished lube;
Described acid number inorganic agent is epoxides or organic amine compound;
The percentage by weight of described sample lubricating oil and acid number inorganic agent is (80 ~ 99.9%): (0.1 ~ 20%).
Preferably, described epoxides is 2,3-epoxy prapanol, 2,3-epoxy prapanol, cyclohexanediol glycidol ether, α-allyl glycidyl ether, β-chloroethyl glycidol ether, phenyl glycidyl ether, a toluene glycidol ether, benzyl glycidyl ether, diphenolic propane diglycidol ether, 1, one or more in 1,2-long-chain alkylene oxide of 2-cylohexanediol diglycidyl ether, allyl glycidyl ether, ethylene glycol diglycidylether, butanediol diglycidyl ether, ethylene oxidic ester, C 12 ~ 14 alkyl glycidyl ether or C4 ~ 30.
Preferably, described organic amine compound is one or more in carbodiimide.
Preferably, described organic amine compound is N, N-DIC or N, N'-dicyclohexylcarbodiimide.
Preferably, described sample lubricating oil is pentaerythritol fatty ester, poly-alkylene ethylene glycol oil or naphthene base crude oil.
Preferably, the described reaction time is 0.5 ~ 10 hour.
Preferably, described reaction temperature is 60 ~ 150 DEG C.
Preferably, the vacuum of described reaction is 0.030 ~ 0.098MPa.
Preferably, the percentage by weight of described sample lubricating oil and acid number inorganic agent is (85 ~ 95%): (5 ~ 15%).
Compared with prior art, sample lubricating oil and acid number inorganic agent react by the present invention, obtain finished lube.Described acid number inorganic agent is epoxides or organic amine compound, epoxides can form ester with the organic acid generation ring-opening reaction in sample lubricating oil, organic amine then forms the derivative that amine salt or addition reaction form urea with organic acid generation neutralization reaction, thus consume organic acid, reach the object reducing acid number.The product that these reactions generate still can be used as a part for lube base oil or additive, and therefore the present invention not only reduces the acid number of sample lubricating oil, and oil product loss is little.In addition, the acid number inorganic agent non-corrosiveness that the present invention adopts, is easy to remove after filtration, can not to environment.Experiment shows, the acid number of the lubricating oil after process of the present invention is 0.01 ~ 0.03mgKOH/g.
Detailed description of the invention
In order to understand the present invention further, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these describe just for further illustrating the features and advantages of the present invention, instead of limiting to the claimed invention.
The embodiment of the invention discloses a kind of processing method of acid value of lubricating oil, comprising:
The sample lubricating oil and the acid number inorganic agent that acid number are greater than 0.2mgKOH/g react, and obtain the lubricating oil that acid number is less than 0.03mgKOH/g;
Described sample lubricating oil is lubricating oil containing additive or lube base oil;
Described acid number inorganic agent is epoxides or organic amine compound;
The percentage by weight of described sample lubricating oil and acid number inorganic agent is (80 ~ 99.9%): (0.1 ~ 20%).
According to the present invention, the present invention is all not particularly limited the kind of described sample lubricating oil and source.Sample lubricating oil can be the base oil needing to carry out acid number process, also can be need to carry out acid number process add the later lubricating oil of additive.This processing procedure can be a process of a certain class lubricating oil of preparation, also can be that the lubricating oil higher to existing acid number processes.Described sample lubricating oil is pentaerythritol fatty ester, poly-alkylene ethylene glycol oil or naphthene base crude oil.Described acid number inorganic agent is epoxides or organic amine compound.Described epoxides is preferably 2,3-epoxy prapanol, 2,3-epoxy prapanol, cyclohexanediol glycidol ether, α-allyl glycidyl ether, β-chloroethyl glycidol ether, phenyl glycidyl ether, a toluene glycidol ether, benzyl glycidyl ether, diphenolic propane diglycidol ether, 1, one or more in 1,2-long-chain alkylene oxide of 2-cylohexanediol diglycidyl ether, allyl glycidyl ether, ethylene glycol diglycidylether, butanediol diglycidyl ether, ethylene oxidic ester, C 12 ~ 14 alkyl glycidyl ether or C4 ~ 30.Described organic amine compound be preferably in carbodiimide one or more, be more preferably N, N-DIC or N, N'-dicyclohexylcarbodiimide.
According to the present invention, described sample lubricating oil and acid number inorganic agent react.The percentage by weight of described sample lubricating oil and acid number inorganic agent is (80 ~ 99.9%): (0.1 ~ 20%), is preferably (85 ~ 95%): (5 ~ 15%).The described reaction time is preferably 0.5 ~ 10 hour, is more preferably 1 ~ 8 hour.Described reaction temperature is preferably 60 ~ 150 DEG C, is more preferably 90 ~ 120 DEG C.The vacuum of described reaction is preferably 0.030 ~ 0.098MPa, is more preferably 0.050 ~ 0.088MPa.After described sample lubricating oil and acid number inorganic agent react, preferably post processing is carried out to reacted mixed liquor, obtain finished lube.Reacted mixed liquor is preferably lowered the temperature by described post processing, then filters.Described cooling preferable temperature is down to less than 60 DEG C.The present invention is not particularly limited described filtration, adopts industrial filter paper to carry out according to mode well known to those skilled in the art.
Carry out acid value measuring to the lubricating oil that the present invention obtains, result shows, the acid number of the lubricating oil obtained according to acid number processing method of the present invention is 0.01 ~ 0.03mgKOH/g.
With the present invention, sample lubricating oil and acid number inorganic agent are reacted, obtain finished lube.Described acid number inorganic agent is epoxides or organic amine compound, epoxides can form ester with the organic acid generation ring-opening reaction in sample lubricating oil, organic amine then forms the derivative that amine salt or addition reaction form urea with organic acid generation neutralization reaction, thus consume organic acid, reach the object reducing acid number.The product that these reactions generate still can be used as a part for lube base oil or additive, and therefore the present invention not only reduces the acid number of sample lubricating oil, and oil product loss is little.In addition, the acid number inorganic agent non-corrosiveness that the present invention adopts, is easy to remove after filtration, can not to environment.Experiment shows, the acid number of the lubricating oil after process of the present invention is 0.01 ~ 0.03mgKOH/g.
In order to understand the present invention further, be described below in conjunction with the processing method of embodiment to acid value of lubricating oil provided by the invention, protection scope of the present invention is not limited by the following examples.
Embodiment 1
Pentaerythritol fatty ester and 5 kilograms of N of to be 0.28mgKOH/g and 40 DEG C kinematic viscosity by 95 kilograms of acid numbers be 32.9mm2/s, N-DIC is by vavuum pump suction 200 liters of chuck vacuum stills, start mixer, open cold condenser, start vavuum pump, maintain vacuum at 0.085MPa, be warmed up to 110 ± 10 DEG C, constant temperature 1 hour.Be cooled to less than 60 DEG C, filter, obtain finished lube.Sample the finished lube obtained, mensuration acid number is 0.01mgKOH/g.Measure the kinematic viscosity of the finished lube obtained, its 40 DEG C of kinematic viscosity are 32mm
2/ s.
Embodiment 2
Be 0.52mgKOH/g and 40 DEG C kinematic viscosity by 900 grams of acid numbers be 68.8mm
2the poly-alkylene ethylene glycol oil of/s and 100 grams of neopentylglycol diglycidyl ethers, by vavuum pump suction 2 liters of there-necked flasks, start mixer, open condensed water, start vavuum pump, maintain vacuum at 0.085MPa, are warmed up to 125 ± 5 DEG C, constant temperature 1 hour.Be cooled to less than 60 DEG C, filter, obtain finished lube.Sample the finished lube obtained, mensuration acid number is 0.03mgKOH/g.Measure the kinematic viscosity of the finished lube obtained, its 40 DEG C of kinematic viscosity are 68.5mm
2/ s.
Embodiment 3
Be 0.36mgKOH/g and 40 DEG C kinematic viscosity by 85 kilograms of acid numbers be 46.3mm
2/ s naphthene base crude oil and 15 kilogram of 2,3-epoxy prapanol, by vavuum pump suction 200 liters of chuck vacuum stills, start mixer, open cold condenser, start vavuum pump, maintain vacuum at 0.082MPa, are warmed up to 100 ± 10 DEG C, constant temperature 2 hours.Be cooled to less than 60 DEG C, filter, obtain finished lube.Sample the finished lube obtained, mensuration acid number is 0.03mgKOH/g.Measure the kinematic viscosity of the finished lube obtained, its 40 DEG C of kinematic viscosity are 46.2mm
2/ s.
Embodiment 4
Be 0.25mgKOH/g and 40 DEG C kinematic viscosity by 900 grams of acid numbers be 32.8mm
2the DRA cycloalkyl refrigerator oil of/s and 100 grams of ethylene glycol diglycidylethers, by vavuum pump suction 2 liters of there-necked flasks, start mixer, open condensed water, start vavuum pump, maintain vacuum at 0.085MPa, are warmed up to 125 ± 5 DEG C, constant temperature 3 hours.Be cooled to less than 60 DEG C, filter, obtain finished lube.Sample the finished lube obtained, mensuration acid number is 0.02mgKOH/g.Measure the kinematic viscosity of the finished lube obtained, its 40 DEG C of kinematic viscosity are 32.0mm
2/ s.
Embodiment 5
Be 0.29mgKOH/g by 85 kilograms of acid numbers, base oil be pentaerythrite carbon five, carbon eight mixed aliphatic ester, 40 DEG C of kinematic viscosity boards be 32.8 synthesis refrigerator oil and 15 kilograms of butanediol diglycidyl ethers by vavuum pump suction 200 liters of chuck vacuum stills, start mixer, open cold condenser, start vavuum pump, maintain vacuum at 0.087MPa, be warmed up to 120 ± 10 DEG C, constant temperature 3 hours.Be cooled to less than 70 DEG C, filter, obtain finished lube.Sample the finished lube obtained, mensuration acid number is 0.01mgKOH/g.Measure the kinematic viscosity of the finished lube obtained, its 40 DEG C of kinematic viscosity are 31.9mm
2/ s.
The explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (4)
1. a processing method for acid value of lubricating oil, comprising:
Sample lubricating oil and acid number inorganic agent are reacted, obtains the lubricating oil that acid number is less than 0.03mgKOH/g;
Described acid number inorganic agent is organic amine compound, and described organic amine compound is N, N-DIC or N, N'-dicyclohexylcarbodiimide;
Described sample lubricating oil is pentaerythritol fatty ester, poly-alkylene ethylene glycol oil or naphthene base crude oil;
The percentage by weight of described sample lubricating oil and acid number inorganic agent is (80 ~ 99.9%): (0.1 ~ 20%);
Described reaction temperature is 60 ~ 150 DEG C.
2. the processing method of acid value of lubricating oil according to claim 1, is characterized in that, the described reaction time is 0.5 ~ 10 hour.
3. the processing method of acid value of lubricating oil according to claim 1, is characterized in that, the vacuum of described reaction is 0.030 ~ 0.098MPa.
4. the processing method of acid value of lubricating oil according to claim 1, is characterized in that, the percentage by weight of described sample lubricating oil and acid number inorganic agent is (85 ~ 95%): (5 ~ 15%).
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| CN109536266B (en) * | 2017-09-21 | 2021-07-30 | 中国石油化工股份有限公司 | Treatment method for reducing acid value of lubricating oil |
| CN108676603A (en) * | 2018-06-27 | 2018-10-19 | 中国石油化工股份有限公司 | The fine purification treatment process and refined high viscosity esters base oil of a kind of high viscosity esters base oil |
| CN110117337A (en) * | 2019-05-16 | 2019-08-13 | 江南大学 | A kind of preparation method of novel synthetic lubricant fluid |
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| DE102009001130A1 (en) * | 2009-02-25 | 2010-08-26 | Rhein Chemie Rheinau Gmbh | A transformer oil composition comprising at least one acid scavenger |
| CN102453608B (en) * | 2010-10-26 | 2013-09-04 | 中国石油化工股份有限公司 | Method for reducing oil acid value and obtained oil mixture |
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