CN101705138A - Pour point depressant of lubricating oil and preparation method thereof - Google Patents
Pour point depressant of lubricating oil and preparation method thereof Download PDFInfo
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- CN101705138A CN101705138A CN200910230132A CN200910230132A CN101705138A CN 101705138 A CN101705138 A CN 101705138A CN 200910230132 A CN200910230132 A CN 200910230132A CN 200910230132 A CN200910230132 A CN 200910230132A CN 101705138 A CN101705138 A CN 101705138A
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- lubricating oil
- solution
- pour point
- point depressant
- toluene
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Abstract
The invention discloses a pour point depressant of lubricating oil, which is a terpolymer of pentaerythritol-2-fatty acid ester, fumaric acid and acrylamide. The invention also discloses a preparation method of the pour point depressant of the lubricating oil, which comprises the following steps: firstly, enabling the pentaerythritol-2-fatty acid ester and the fumaric acid to react, dropwise adding the acrylamide and a toluene solution of an initiator of benzoyl peroxide under the protection of nitrogen gas, reacting for 5-7h at constant temperature, then regulating the pH to a neutral state, afterwards leaching and drying in vacuum so as to obtain the pour point depressant of the lubricating oil. The pour point depressant has a favorable pour point depressant function to various types of lubricating oil and has wide range of the working temperature, stable performance, very high industrial application value and extensive development prospect.
Description
Technical field
The present invention relates to a kind of pour depressant for lubricating oil, be specifically related to a kind of polymer lubricant oil pour point depressant that forms by tetramethylolmethane di fatty acid ester, fumaric acid, three kinds of monomer polymerizations of acrylamide, the invention still further relates to the preparation method of this pour depressant for lubricating oil.
Background technology
Lubricating oil generally will add suitable pour point depressant under the situation that the dewaxing degree of depth can not meet the demands.After first kind of pour point depressant (being named Paraflow) in 1931 appearance, all obtaining very big progress aspect the synthetic and pour point depressant mechanism of action two of pour point depressant, but the actual kind of using is also few, generally can be divided three classes: alkylnaphthalene class, polyolefins and polyester.Alkylnaphthalene class pour point depressant centering matter and heavy grease have good pour point depression effect, generally are used for I. C. engine oil, machinery oil and gear oil, add the about 0.2%-1.0% of dosage, but alkylnaphthalene class pour point depressant color is darker, should not be used for light oil product.What the polyolefin product use was more is Poly alpha Olefins (PAO), disclosing a kind of pour depressant for lubricating oil that is polymerized by a-alkene and maleic anhydride as the patent No. 96109020.0 is a kind of efficient light pour point depressant, it of light color, effective, in various lubricating oil, but production cost is higher, and there is restriction in working range.Polyester mainly refers to polymethacrylate (PMA).PMA is the high-quality pour point depressant that domestic and international additive and lubricating oil processing merchant generally acknowledge, at different base oils, pour point depressant is had stronger selectivity.PMA itself has very strong adaptive faculty, and methacrylic ester that can alkyl group side chain is different is produced the pour point depressant of different size by different proportionings, is used for the base oil of different viscosity grade, therefore also has shortcomings such as single product narrow application range.
More than most pour point depressant have such-and-such problem, can be attributed to them and be and be single polymkeric substance pour point depressant or binary polymer pour point depressant, this will cause their single property, uses limited.
Summary of the invention
The present invention is narrow in use range for solving above-mentioned pour depressant for lubricating oil, the problem that production cost is high provide in a kind of lubricating base oils that can be applicable to the different viscosity grade, and operating temperature range is wide, stable performance, the terpolymer pour depressant for lubricating oil that the pour point depression effect is superior.
Technical scheme of the present invention is as follows:
Pour depressant for lubricating oil of the present invention is for having following structural formula
The terpolymer of tetramethylolmethane di fatty acid ester, fumaric acid and acrylamide; Wherein, R is C
12-C
18Alkyl, n is the integer of 50-120.
The preparation method of pour depressant for lubricating oil of the present invention adopts following step:
(1) in reaction vessel, add 1mol tetramethylolmethane di fatty acid ester, 1.2-1.5mol fumaric acid, 0.2-0.4mol catalyzer tosic acid and 250ml toluene, stir in 50-60 ℃ of water bath with thermostatic control and make its dissolving, and logical nitrogen 30-60 minute, get solution A;
(2) under nitrogen protection, solution A is warming up to 80-85 ℃, drip the 2.2-2.6mol acrylamide, drip the toluene solution of initiator benzoyl peroxide simultaneously, the control rate of addition is 0.5 droplet/second, removes solvent under reduced pressure in 50 ℃ behind the isothermal reaction 5-7h, solution B; Wherein in the toluene solution of initiator benzoyl peroxide, benzoyl peroxide is 0.1-0.5mol, and toluene is 175ml;
(3) with above-mentioned solution B with the solution washing of the NaOH of 5wt% to pH value 8～9, again with deionized water wash to neutrality, suction filtration then, filter cake promptly gets pour depressant for lubricating oil of the present invention in 80 ℃ of vacuum-drying 24h.
In the preparation process of above-mentioned pour depressant for lubricating oil (1), feed nitrogen, mainly be to be purpose with the oxygen of discharging in the reactor system, the selection of the vacuum tightness when removing vacuum-drying in solvent and the step (3) in the step (2) under reduced pressure is to utilize test and being advisable of producing, and this also is the common practise of ordinary test and production.
The di fatty acid ester of tetramethylolmethane described in the present invention can prepare by following method:
Under nitrogen protection, with the tetramethylolmethane of 1mol, the lipid acid (C of 2mol
12-C
18Saturated fatty acid), the catalyzer tosic acid of 0.2mol and 250mL solvent toluene add and be equipped with in the 500mL there-necked flask of water trap, stirring is warming up to 120-130 ℃, the water of question response to water trap is during near 36mL, be cooled to 80 ℃, add sherwood oil and make dissolving fully, the solution washing of using 5wt%NaOH is removed catalyzer and the intact lipid acid of unreacted in the solution to pH=8-9, utilize separating funnel to remove sub-cloud solution again, preserve upper strata organic layer solution.Then with distilled water that the organic layer washing is extremely neutral, sherwood oil and small amount of toluene are removed in 50 ℃ of underpressure distillation, promptly.
Pour depressant for lubricating oil of the present invention can effectively prevent lubricating oil condensing in use, and the lubricating oil to different model all has good effect, also show good performance in different conditions, same other pour point depressants commonly used that below use pour depressant for lubricating oil of the present invention are to dissimilar lubricating oil pour point depression effect comparison:
Table one: same other pour point depressant pour point depression effect comparison commonly used of pour depressant for lubricating oil of the present invention
In the table: 1 is the paraffinic base hydrogenated base oil; 2 is external hydrotreating base oil; 3 is synthetic oil basis oil; 4 is the intermediate base base oil; 5 is naphthenic base oils.
By above result as can be seen, though the pour point depression of pour point depressant described in the present invention effect is more or less the same with the optimum value of other pour point depressants at certain type lubricating oil, but this pour point depressant all has good pour point depressant to various lubricating oil, and operating temperature range is wide, stable performance, this is that other existing pour point depressants are incomparable, and therefore this product also has very high industrial application value, and development prospect is wide.
Embodiment
Embodiment 1
(1) in reaction vessel, add 1mol pentaerythritol stearic acid ester 2,1.5mol fumaric acid, 0.4mol catalyzer tosic acid and 250ml toluene, stir in 60 ℃ of waters bath with thermostatic control and make its dissolving, and logical nitrogen 30-60 minute, get solution A;
(2) solution A is warming up to 80-85 ℃, drip the 2.6mol acrylamide, (benzoyl peroxide/toluene=0.3mol/175ml), the control rate of addition is 0.5 droplet/second to drip the toluene solution of initiator benzoyl peroxide simultaneously, remove solvent under reduced pressure in 50 ℃ behind the isothermal reaction 7h, solution B;
(3) with above-mentioned solution B with the solution washing of the NaOH of 5wt% to pH value 8～9, again with deionized water wash to neutrality, suction filtration then, filter cake promptly gets pour depressant for lubricating oil of the present invention in 80 ℃ of vacuum-drying 24h.
Embodiment 2
(1) in reaction vessel, add 1mol tetramethylolmethane dipalmitate, 1.2mol fumaric acid, 0.3mol catalyzer tosic acid and 250ml toluene, stir in 50 ℃ of waters bath with thermostatic control and make its dissolving, and logical nitrogen 30-60 minute, get solution A;
(2) solution A is warming up to 80-85 ℃, drip the 2.4mol acrylamide, (benzoyl peroxide/toluene=0.5mol/175ml), the control rate of addition is 0.5 droplet/second to drip the toluene solution of initiator benzoyl peroxide simultaneously, remove solvent under reduced pressure in 50 ℃ behind the isothermal reaction 5h, solution B;
(3) with above-mentioned solution B with the solution washing of the NaOH of 5wt% to pH value 8～9, again with deionized water wash to neutrality, suction filtration then, filter cake promptly gets pour depressant for lubricating oil of the present invention in 80 ℃ of vacuum-drying 24h.
Embodiment 3
(1) in reaction vessel, add 1mol tetramethylolmethane dilaurate, 1.2mol fumaric acid, 0.2mol catalyzer tosic acid and 250ml toluene, stir in 60 ℃ of waters bath with thermostatic control and make its dissolving, and logical nitrogen 30-60 minute, get solution A;
(2) solution A is warming up to 80-85 ℃, drip the 2.2mol acrylamide, (benzoyl peroxide/toluene=0.3mol/175ml), the control rate of addition is 0.5 droplet/second to drip the toluene solution of initiator benzoyl peroxide simultaneously, remove solvent under reduced pressure in 50 ℃ behind the isothermal reaction 5h, solution B;
(3) with above-mentioned solution B with the solution washing of the NaOH of 5wt% to pH value 8～9, again with deionized water wash to neutrality, suction filtration then, filter cake promptly gets pour depressant for lubricating oil of the present invention in 80 ℃ of vacuum-drying 24h.
Claims (2)
1. a pour depressant for lubricating oil is characterized in that for having structural formula
The terpolymer of tetramethylolmethane di fatty acid ester, fumaric acid and acrylamide; Wherein, R is C
12-C
18Alkyl, n is the integer of 50-120.
2. the preparation method of the described pour depressant for lubricating oil of claim 1 is characterized in that adopting following step:
(1) in reaction vessel, add 1mol tetramethylolmethane di fatty acid ester, 1.2-1.5mol fumaric acid, 0.2-0.4mol catalyzer tosic acid and 250ml toluene, stir in 50-60 ℃ of water bath with thermostatic control and make its dissolving, and logical nitrogen 30-60 minute, get solution A;
(2) under nitrogen protection, solution A is warming up to 80-85 ℃, drip the 2.2-2.6mol acrylamide, drip the toluene solution of initiator benzoyl peroxide simultaneously, the control rate of addition is 0.5 droplet/second, removes solvent under reduced pressure in 50 ℃ behind the isothermal reaction 5-7h, solution B; Wherein in the toluene solution of initiator benzoyl peroxide, benzoyl peroxide is 0.1-0.5mol, and toluene is 175ml;
(3) with above-mentioned solution B with the solution washing of the NaOH of 5wt% to pH value 8～9, again with deionized water wash to neutrality, suction filtration then, filter cake promptly gets pour depressant for lubricating oil of the present invention in 80 ℃ of vacuum-drying 24h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910230132A CN101705138A (en) | 2009-11-18 | 2009-11-18 | Pour point depressant of lubricating oil and preparation method thereof |
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| CN200910230132A CN101705138A (en) | 2009-11-18 | 2009-11-18 | Pour point depressant of lubricating oil and preparation method thereof |
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| CN101705138A true CN101705138A (en) | 2010-05-12 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102952235A (en) * | 2011-08-18 | 2013-03-06 | 中国石油化工股份有限公司 | Polymer used in lubricating oil pour point depressing, lubricating oil pour point depressant, and preparation method thereof |
| CN102952232A (en) * | 2011-08-18 | 2013-03-06 | 中国石油化工股份有限公司 | Polymer used in lubricating oil pour point depressing, lubricating oil pour point depressant, and preparation method thereof |
| CN103627507A (en) * | 2013-12-25 | 2014-03-12 | 济南开发区星火科学技术研究院 | Preparation method of bentonite lubricating oil flocculant |
| CN104710560A (en) * | 2013-12-13 | 2015-06-17 | 中国石油天然气集团公司 | Dicyclopentadiene and acrylic acid high-carbon alcohol ester polymer crude oil pour point depressant |
| CN115926870A (en) * | 2022-11-11 | 2023-04-07 | 董天剑 | Lubricating oil pour point depressant and preparation method thereof |
-
2009
- 2009-11-18 CN CN200910230132A patent/CN101705138A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102952235A (en) * | 2011-08-18 | 2013-03-06 | 中国石油化工股份有限公司 | Polymer used in lubricating oil pour point depressing, lubricating oil pour point depressant, and preparation method thereof |
| CN102952232A (en) * | 2011-08-18 | 2013-03-06 | 中国石油化工股份有限公司 | Polymer used in lubricating oil pour point depressing, lubricating oil pour point depressant, and preparation method thereof |
| CN102952232B (en) * | 2011-08-18 | 2014-10-29 | 中国石油化工股份有限公司 | Polymer used in lubricating oil pour point depressing, lubricating oil pour point depressant, and preparation method thereof |
| CN102952235B (en) * | 2011-08-18 | 2014-12-31 | 中国石油化工股份有限公司 | Polymer used in lubricating oil pour point depressing, lubricating oil pour point depressant, and preparation method thereof |
| CN104710560A (en) * | 2013-12-13 | 2015-06-17 | 中国石油天然气集团公司 | Dicyclopentadiene and acrylic acid high-carbon alcohol ester polymer crude oil pour point depressant |
| CN103627507A (en) * | 2013-12-25 | 2014-03-12 | 济南开发区星火科学技术研究院 | Preparation method of bentonite lubricating oil flocculant |
| CN115926870A (en) * | 2022-11-11 | 2023-04-07 | 董天剑 | Lubricating oil pour point depressant and preparation method thereof |
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Application publication date: 20100512 |