CN110295070B - Compound diesel pour point depressant and preparation method and application thereof - Google Patents
Compound diesel pour point depressant and preparation method and application thereof Download PDFInfo
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- CN110295070B CN110295070B CN201910517904.4A CN201910517904A CN110295070B CN 110295070 B CN110295070 B CN 110295070B CN 201910517904 A CN201910517904 A CN 201910517904A CN 110295070 B CN110295070 B CN 110295070B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/04—Liquid carbonaceous fuels essentially based on blends of hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/18—Organic compounds containing oxygen
- C10L1/19—Esters ester radical containing compounds; ester ethers; carbonic acid esters
- C10L1/1915—Esters ester radical containing compounds; ester ethers; carbonic acid esters complex esters (at least 3 ester bonds)
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/18—Organic compounds containing oxygen
- C10L1/192—Macromolecular compounds
- C10L1/195—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C10L1/196—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof
- C10L1/1963—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and a carboxyl group or salts, anhydrides or esters thereof homo- or copolymers of compounds having one or more unsaturated aliphatic radicals each having one carbon bond to carbon double bond, and at least one being terminated by a carboxyl radical or of salts, anhydrides or esters thereof mono-carboxylic
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/22—Organic compounds containing nitrogen
- C10L1/222—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen single bond
- C10L1/224—Amides; Imides carboxylic acid amides, imides
Abstract
The invention relates to a compound diesel pour point depressant, a preparation method and application thereof, wherein the compound diesel pour point depressant is prepared from the following raw materials in percentage by weight: the diesel pour point depressant composition is prepared by directly mixing 0-40% of span 801, 30-40% of EVA pour point depressant and 30-60% of tetradecyl methacrylate-N-vinyl caprolactam pour point depressant according to mass ratio. Adding the composition into Songjiang No. 0 diesel oil according to the mass of 0.15%, and performing ultrasonic dispersion at 40 deg.C for 30min. Compared with the prior art, the invention has the advantages that the highest condensation point of the diesel oil is reduced by 15-17 ℃ and the cold filter plugging point is reduced by 7-14 ℃ through detection.
Description
Technical Field
The invention belongs to the technical field of diesel pour point depressants, and particularly relates to a compound diesel pour point depressant and a preparation method and application thereof.
Background
The pour point depressant of diesel oil is also called low-temperature flow improver, because the sensitivity of the diesel oil to the pour point depressant is related to the normal paraffin of the diesel oil. At present, the measure for improving the low-temperature fluidity of diesel oil is to establish a dewaxing device, add secondary processing diesel oil for blending and add a low-temperature fluidity improver.
Pour point depressant compounding forms include compounding between pour point depressants, compounding between pour point depressants and surfactants, and compounding between pour point depressants and some solvents. Pour point depressants currently under study include ethylene-vinyl acetate pour point depressants, maleic anhydride pour point depressants, acrylate pour point depressants, and other forms. The effect of the single polymer pour point depressant is not ideal, and the development of a compound pour point depressant is the most effective measure for improving the low-temperature fluidity of diesel at present.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a compound diesel pour point depressant, a preparation method and application thereof, so that the cold filter plugging point and the cold filter plugging point of diesel oil can be obviously improved.
The purpose of the invention can be realized by the following technical scheme:
the compound diesel pour point depressant is prepared from the following raw materials in percentage by weight:
8010-40% of span
30-40% of EVA pour point depressant
30-60% of tetradecyl methacrylate-N-vinyl caprolactam pour point depressant.
The material is preferably prepared from the following components in percentage by weight:
span 8020%
EVA pour point depressant 30%
And 50% of tetradecyl methacrylate-N-vinyl caprolactam pour point depressant.
The material is preferably prepared from the following components in percentage by weight:
span 8020%
EVA pour point depressant 40%
And 40 percent of methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant.
The material is preferably prepared from the following components in percentage by weight:
span 8030%
EVA pour point depressant 30%
And 40 percent of methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant.
The material is preferably prepared from the following components in percentage by weight:
span 8010%
EVA pour point depressant 30%
And 60 percent of methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant.
The material is preferably prepared from the following components in percentage by weight:
span 8040%
EVA pour point depressant 30%
And 30 percent of methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant.
The preparation method of the compound diesel pour point depressant comprises the following steps:
mixing tetradecyl methacrylate and N-vinyl caprolactam according to a molar ratio of 9:1, adding the mixture into a toluene solvent, and reacting for 9 hours at 110-130 ℃ under the condition that benzoyl peroxide accounting for 0.9% of the total mass of reactants is used as an initiator to obtain tetradecyl methacrylate-N-vinyl caprolactam pour point depressant;
the compound diesel pour point depressant is prepared by mixing the raw materials according to a formula.
Adding the compound diesel pour point depressant into diesel oil, and ultrasonically dispersing in the diesel oil for 20-40 min at 20-50 ℃.
The content of the compound diesel pour point depressant in the diesel is 0.1-0.2 wt%.
The diesel oil is Songjiang No. 0 diesel oil or No. 0 petrochemical diesel oil.
Compared with the prior art, the invention can obviously improve the cold filter plugging point and the condensation point of the diesel oil, and can reduce the condensation point of the diesel oil by 15-17 ℃ and the cold filter plugging point by 7-14 ℃ to the maximum extent. Polar groups in the span 80 surfactant interact with wax crystals, so that the span 80 surfactant has a better dispersing effect on the wax crystals; the EVA pour point depressant can inhibit the precipitation of wax crystals by performing adsorption and eutectic effects with the wax crystals in the diesel oil; the tetradecyl methacrylate-N-vinyl caprolactam pour point depressant has good sensitivity to diesel oil, the alkyl long chain is matched with the normal paraffin carbon chain in the diesel oil, and the pour point depressant and wax crystals interact with each other according to the carbon chain matching principle, so that the cold filter plugging point is obviously reduced; the span 80 surfactant and the EVA pour point depressant broaden the pour point depression range of the tetradecyl methacrylate-N-vinyl caprolactam pour point depressant, have obvious synergistic effect and obviously improve the low-temperature fluidity of the diesel oil.
Drawings
FIG. 1 is a nuclear magnetic diagram of tetradecyl methacrylate-N-vinylcaprolactam;
FIG. 2 is an infrared image of tetradecyl methacrylate-N-vinylcaprolactam.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Each raw material used in the following examples is a commercially available product.
The measuring method of the condensation point is carried out according to GB510-83 petroleum product condensation point determination and the measuring method of the cold filter plugging point is carried out according to SH/T0248-2006 diesel oil and civil heating oil cold filter plugging point determination.
The following examples used the starting materials:
0# diesel oil purchased from Shanghai Songjiang gasoline station
EVA pour point depressant is available from Shanghai Tantake Technology Co., Ltd
The preparation method of the tetradecyl methacrylate-N-vinyl caprolactam pour point depressant used in the following examples is as follows: and mixing the tetradecyl methacrylate and the N-vinyl caprolactam with the molar ratio of 9:1, adding the mixture into a toluene solvent, and reacting at 120 ℃ for 9 hours under the condition that benzoyl peroxide accounting for 0.9 percent of the total mass of reactants is used as an initiator to obtain the tetradecyl methacrylate-N-vinyl caprolactam pour point depressant. The obtained tetradecyl methacrylate-N-vinyl caprolactam is subjected to nuclear magnetic and infrared characterization and is respectively shown in figures 1 and 2.
Example 1
The compound diesel pour point depressant comprises the following components in percentage by mass:
span 8020%
EVA pour point depressant 30%
Tetradecyl methacrylate-N-vinyl caprolactam pour point depressant 50 percent
The preparation method of the tetradecyl methacrylate-N-vinyl caprolactam comprises the following steps: the tetradecyl methacrylate and the N-vinyl caprolactam with the molar ratio of 9:1 are mixed and added into a toluene solvent to react for 9 hours at 120 ℃ under the condition that benzoyl peroxide accounting for 0.9 percent of the total mass of reactants is taken as an initiator, so as to obtain the tetradecyl methacrylate-N-vinyl caprolactam pour point depressant.
Directly mixing span 80, EVA pour point depressant and methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant to obtain the diesel pour point depressant composition.
Adding the composition into Songjiang No. 0 diesel oil according to the mass of 0.15%, and performing ultrasonic dispersion at 40 deg.C for 30min.
The commercial 0# diesel containing the diesel pour point depressant composition obtained in the above examples was tested for a 17 ℃ and 11 ℃ reduction in cold filter plugging point, respectively.
Example 2
The compound diesel pour point depressant comprises the following components in percentage by mass:
span 8020%
EVA pour point depressant 40%
Tetradecyl methacrylate-N-vinyl caprolactam pour point depressant 40 percent
The preparation method of the tetradecyl methacrylate-N-vinyl caprolactam comprises the following steps: the tetradecyl methacrylate and the N-vinyl caprolactam with the molar ratio of 9:1 are mixed and added into a toluene solvent to react for 9 hours at 120 ℃ under the condition that benzoyl peroxide accounting for 0.9 percent of the total mass of reactants is taken as an initiator, so as to obtain the tetradecyl methacrylate-N-vinyl caprolactam pour point depressant.
Directly mixing span 80, EVA pour point depressant and methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant to obtain the diesel pour point depressant composition.
Adding the composition into Songjiang No. 0 diesel oil according to the mass of 0.15%, and performing ultrasonic dispersion at 40 deg.C for 30min.
The commercial 0# diesel containing the diesel pour point depressant composition obtained in the above examples was tested for a reduction in the freezing point and cold filter plugging point of 16 ℃ and 14 ℃, respectively.
Example 3
The compound diesel pour point depressant comprises the following components in percentage by mass:
span 8030%
EVA pour point depressant 30%
Tetradecyl methacrylate-N-vinyl caprolactam pour point depressant 40 percent
The preparation method of the tetradecyl methacrylate-N-vinyl caprolactam comprises the following steps: the tetradecyl methacrylate and the N-vinyl caprolactam with the molar ratio of 9:1 are mixed and added into a toluene solvent to react for 9 hours at 120 ℃ under the condition that benzoyl peroxide accounting for 0.9 percent of the total mass of reactants is taken as an initiator, so as to obtain the tetradecyl methacrylate-N-vinyl caprolactam pour point depressant.
Directly mixing span 80, EVA pour point depressant and methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant to obtain the diesel pour point depressant composition.
Adding the composition into Songjiang No. 0 diesel oil according to the mass of 0.15%, and performing ultrasonic dispersion at 40 deg.C for 30min.
The commercial 0# diesel containing the diesel pour point depressant composition obtained in the above examples was tested for a 15 ℃ and 7 ℃ reduction in cold filter plugging point, respectively.
Example 4
The compound diesel pour point depressant comprises the following components in percentage by mass:
span 8010%
EVA pour point depressant 30%
Tetradecyl methacrylate-N-vinyl caprolactam pour point depressant 60 percent
The preparation method of the tetradecyl methacrylate-N-vinyl caprolactam comprises the following steps: the tetradecyl methacrylate and the N-vinyl caprolactam with the molar ratio of 9:1 are mixed and added into a toluene solvent to react for 9 hours at 120 ℃ under the condition that benzoyl peroxide accounting for 0.9 percent of the total mass of reactants is taken as an initiator, so as to obtain the tetradecyl methacrylate-N-vinyl caprolactam pour point depressant.
Directly mixing span 80, EVA pour point depressant and methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant to obtain the diesel pour point depressant composition.
Adding the composition into Songjiang No. 0 diesel oil according to the mass of 0.15%, and performing ultrasonic dispersion at 40 deg.C for 30min.
The commercial 0# diesel containing the diesel pour point depressant composition obtained in the above examples was tested for a 17 ℃ and 9 ℃ reduction in cold filter plugging point, respectively.
Example 5
The compound diesel pour point depressant comprises the following components in percentage by mass:
span 8040%
EVA pour point depressant 30%
Tetradecyl methacrylate-N-vinyl caprolactam pour point depressant 30 percent
The preparation method of the tetradecyl methacrylate-N-vinyl caprolactam comprises the following steps: the tetradecyl methacrylate and the N-vinyl caprolactam with the molar ratio of 9:1 are mixed and added into a toluene solvent to react for 9 hours at 120 ℃ under the condition that benzoyl peroxide accounting for 0.9 percent of the total mass of reactants is taken as an initiator, so as to obtain the tetradecyl methacrylate-N-vinyl caprolactam pour point depressant.
Directly mixing span 80, EVA pour point depressant and methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant to obtain the diesel pour point depressant composition.
Adding the composition into Songjiang No. 0 diesel oil according to the mass of 0.15%, and ultrasonically dispersing at 40 deg.C for 30min
The commercial 0# diesel containing the diesel pour point depressant composition obtained in the above examples was tested for a 17 ℃ and 9 ℃ reduction in cold filter plugging point, respectively.
When the pour point depressant is compounded with the polar nitrogen-containing compound, the polarity in the polar nitrogen-containing compound plays a role in shielding n-alkanes, so that the compound pour point depressant has the best effect. The test shows that the highest condensation point of the diesel oil is respectively reduced by 15 to 17 ℃ and the cold filter plugging point is reduced by 7 to 14 ℃.
Example 6
The compound diesel pour point depressant comprises the following components in percentage by mass:
span 8020%
EVA pour point depressant 40%
Tetradecyl methacrylate-N-vinyl caprolactam pour point depressant 40 percent
The preparation method of the tetradecyl methacrylate-N-vinyl caprolactam comprises the following steps: the tetradecyl methacrylate and the N-vinyl caprolactam with the molar ratio of 9:1 are mixed and added into a toluene solvent to react for 9 hours at 110 ℃ under the condition that benzoyl peroxide accounting for 0.9 percent of the total mass of reactants is taken as an initiator, so as to obtain the tetradecyl methacrylate-N-vinyl caprolactam pour point depressant.
Directly mixing span 80, EVA pour point depressant and methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant to obtain the diesel pour point depressant composition.
Adding the composition into 0# petroleum diesel oil according to the mass of 0.1%, and ultrasonically dispersing for 40min at 20 ℃.
The commercial 0# diesel containing the diesel pour point depressant composition obtained in the above examples was tested for a reduction in the freezing point and cold filter plugging point of 16 ℃ and 14 ℃, respectively.
Example 7
The compound diesel pour point depressant comprises the following components in percentage by mass:
span 8030%
EVA pour point depressant 30%
Tetradecyl methacrylate-N-vinyl caprolactam pour point depressant 40 percent
The preparation method of the tetradecyl methacrylate-N-vinyl caprolactam comprises the following steps: the tetradecyl methacrylate and the N-vinyl caprolactam with the molar ratio of 9:1 are mixed and added into a toluene solvent to react for 9 hours at 130 ℃ under the condition that benzoyl peroxide accounting for 0.9 percent of the total mass of reactants is taken as an initiator, so as to obtain the tetradecyl methacrylate-N-vinyl caprolactam pour point depressant.
Directly mixing span 80, EVA pour point depressant and methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant to obtain the diesel pour point depressant composition.
Adding the composition into 0# petroleum diesel oil according to the mass of 0.15%, and ultrasonically dispersing for 20min at 50 ℃.
The commercial 0# diesel containing the diesel pour point depressant composition obtained in the above examples was tested for a 15 ℃ and 7 ℃ reduction in cold filter plugging point, respectively.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The compound diesel pour point depressant is characterized by being used for being added into diesel to reduce the condensation point of the diesel by 15-17 ℃ and the cold filter plugging point by 7-14 ℃, and the pour point depressant is prepared from the following raw materials in percentage by weight:
8010-40% of span
30-40% of EVA pour point depressant
30-60% of tetradecyl methacrylate-N-vinyl caprolactam pour point depressant.
2. The compound diesel pour point depressant according to claim 1, wherein the compound diesel pour point depressant is prepared from the following raw materials in percentage by weight:
span 8020%
EVA pour point depressant 30%
And 50% of tetradecyl methacrylate-N-vinyl caprolactam pour point depressant.
3. The compound diesel pour point depressant according to claim 1, wherein the compound diesel pour point depressant is prepared from the following raw materials in percentage by weight:
span 8020%
EVA pour point depressant 40%
And 40 percent of methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant.
4. The compound diesel pour point depressant according to claim 1, wherein the compound diesel pour point depressant is prepared from the following raw materials in percentage by weight:
span 8030%
EVA pour point depressant 30%
And 40 percent of methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant.
5. The compound diesel pour point depressant according to claim 1, wherein the compound diesel pour point depressant is prepared from the following raw materials in percentage by weight:
span 8010%
EVA pour point depressant 30%
And 60 percent of methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant.
6. The compound diesel pour point depressant according to claim 1, wherein the compound diesel pour point depressant is prepared from the following raw materials in percentage by weight:
span 8040%
EVA pour point depressant 30%
And 30 percent of methacrylic acid tetradecyl ester-N-vinyl caprolactam pour point depressant.
7. The method for preparing the compound diesel pour point depressant according to any one of claims 1 to 6, wherein the method comprises the following steps:
mixing tetradecyl methacrylate and N-vinyl caprolactam according to a molar ratio of 9:1, adding the mixture into a toluene solvent, and reacting for 8-10 hours at 110-130 ℃ under the condition that benzoyl peroxide is used as an initiator to obtain a tetradecyl methacrylate-N-vinyl caprolactam pour point depressant;
the compound diesel pour point depressant is prepared by mixing the raw materials according to a formula.
8. The application of the compound diesel oil pour point depressant according to any one of claims 1 to 6, wherein the compound diesel oil pour point depressant is added into diesel oil and ultrasonically dispersed in the diesel oil for 20 to 40min at the temperature of between 20 and 50 ℃.
9. The application of the compound diesel oil pour point depressant according to claim 8, wherein the content of the compound diesel oil pour point depressant in diesel oil is 0.1-0.2 wt%.
10. The application of the compound diesel pour point depressant according to claim 8, wherein the diesel is Yangtze river 0# diesel or 0# petroleum diesel.
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| CN111269352A (en) * | 2020-03-31 | 2020-06-12 | 上海应用技术大学 | Binary nitrogen-containing polymer diesel pour point depressant and preparation and application thereof |
| CN111635801A (en) * | 2020-05-11 | 2020-09-08 | 江苏龙蟠科技股份有限公司 | PMMA-containing composite pour point depressant and preparation method and application thereof |
| CN114031711B (en) * | 2021-10-25 | 2023-04-28 | 上海应用技术大学 | Ternary polymer biodiesel pour point depressant and preparation method thereof |
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| CN110753707A (en) * | 2017-06-07 | 2020-02-04 | 罗地亚经营管理公司 | Polymer dispersions for wax inhibition |
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