阅读说明：本技术 一种极性含氮类柴油降凝剂组合物及其制备和应用 (Polar nitrogen-containing diesel pour point depressant composition and preparation and application thereof ) 是由 蔺华林 殷素雅 李欣 袁铭霞 解麦莹 陈凤飞 杨太顺 韩生 于 2020-05-30 设计创作，主要内容包括：本发明涉及一种极性含氮类柴油降凝剂组合物及其制备和应用,该柴油降凝剂组合物由以下重量百分比的组分组成：三乙醇胺10-40％；司盘80 10-40％；脂肪醇聚氧乙烯醚0-20％；N-苯基甲基丙烯酰胺-甲基丙烯酸十四酯40-60％。与现有技术相比,本发明可提高降凝剂在市售0#柴油中的分散性,可使其冷凝点降低22-26℃、冷滤点降低8-12℃。(The invention relates to a polar nitrogen-containing diesel pour point depressant composition, and a preparation method and application thereof, wherein the diesel pour point depressant composition comprises the following components in percentage by weight: 10-40% of triethanolamine; span 8010-40%; 0-20% of fatty alcohol-polyoxyethylene ether; 40-60% of N-phenyl methacrylamide-tetradecyl methacrylate. Compared with the prior art, the invention can improve the dispersibility of the pour point depressant in the 0# diesel sold in the market, and can reduce the condensation point by 22-26 ℃ and the cold filter plugging point by 8-12 ℃.)

1. The polar nitrogen-containing diesel pour point depressant composition is characterized by comprising the following components in percentage by weight:

2. the polar nitrogen-containing diesel pour point depressant composition of claim 1, wherein the N-phenyl methacrylamide-tetradecyl methacrylate is obtained by reacting N-phenyl methacrylamide and tetradecyl methacrylate in the presence of toluene as a solvent and benzoyl peroxide as an initiator.

3. The polar nitrogen-containing diesel pour point depressant composition of claim 2, wherein the molar ratio of N-phenyl methacrylamide to tetradecyl methacrylate is 1: 10.

4. The polar nitrogen-containing diesel pour point depressant composition of claim 2, wherein the reaction temperature is 120 ℃ and the reaction time is 8 hours.

5. The polar nitrogen-containing diesel pour point depressant composition of claim 1, wherein the polar nitrogen-containing diesel pour point depressant composition is composed of the following components in percentage by weight:

6. the preparation method of the polar nitrogen-containing diesel pour point depressant composition according to any one of claims 1 to 5, wherein the target product is obtained by weighing N-phenyl methacrylamide-tetradecyl methacrylate, triethanolamine, span 80 and fatty alcohol-polyoxyethylene ether according to a metering ratio, mixing and stirring uniformly, and performing ultrasonic dispersion.

7. The method for preparing the polar nitrogen-containing diesel pour point depressant composition according to claim 6, wherein the mixing and stirring temperature is 20-30 ℃, and the ultrasonic dispersion time is 10-20 min.

8. The use of the polar nitrogen-containing diesel pour point depressant composition according to any one of claims 1 to 5, wherein in use, the polar nitrogen-containing diesel pour point depressant composition is added to diesel oil, mixed and stirred uniformly, and then subjected to ultrasonic dispersion to complete the process.

9. The use of the polar nitrogen-containing diesel fuel pour point depressant composition according to claim 8, wherein the mass ratio of the polar nitrogen-containing diesel fuel pour point depressant composition to the diesel fuel is 1: 100-1000.

10. The use of the polar nitrogen-containing diesel pour point depressant composition according to claim 8, wherein the mixing and stirring temperature is 30-45 ℃ and the ultrasonic dispersion time is 30 min.

Technical Field

The invention belongs to the technical field of diesel pour point depressants, and relates to a polar nitrogen-containing diesel pour point depressant composition, and preparation and application thereof.

Background

The cold filter performance improver for diesel oil is one important fuel additive in diesel oil production. It can change the low-temperature flowing property of diesel oil obviously, broaden the distillation range of diesel oil, raise diesel oil yield and quality, and has important significance in increasing the economic benefit of oil refinery. The research on diesel pour point depressants began in the domestic from 60 s, but there were some problems in the early development work: firstly, the index for measuring the performance of the diesel oil is only one of the condensation point, and secondly, the domestic developed varieties mainly adopt imitation as the main part, and have the problems of strong dependence on the diesel oil and poor sensitivity. The existing diesel oil pour point depressant mainly takes a single polymethacrylic acid higher alcohol ester product as a main component, and the pour point depressant has the defects of insufficient cold filter plugging point reduction effect and the like in actual use.

Disclosure of Invention

The invention aims to provide a polar nitrogen-containing diesel pour point depressant composition, and a preparation method and application thereof, so as to solve the problems of insufficient cold filter plugging point reduction effect and large using amount, reduce the interfacial surface tension and improve the low-temperature fluidity of diesel.

In the polar nitrogen-containing diesel pour point depressant composition, the N-phenyl methacrylamide-tetradecyl methacrylate plays a role of a main agent, the cold filter plugging point of the diesel is obviously reduced through the effects of eutectic crystal and adsorption, the auxiliary agent span 80, triethanolamine and fatty alcohol-polyoxyethylene ether are good surfactants, and the polar nitrogen-containing diesel pour point depressant composition is simple in preparation process, convenient to operate and obvious in effect.

The purpose of the invention can be realized by the following technical scheme:

one of the technical schemes of the invention provides a polar nitrogen-containing diesel pour point depressant composition, which comprises the following components in percentage by weight:

furthermore, the N-phenyl methacrylamide-tetradecyl methacrylate is obtained by reacting N-phenyl methacrylamide and tetradecyl methacrylate under the conditions that toluene is used as a solvent and benzoyl peroxide is used as an initiator. Further, the molar ratio of N-phenyl methacrylamide to tetradecyl methacrylate was 1: 10. Furthermore, the reaction temperature is 120 ℃ and the reaction time is 8 h.

Further, the polar nitrogen-containing diesel pour point depressant composition consists of the following components in percentage by weight:

the second technical scheme of the invention provides a preparation method of the polar nitrogen-containing diesel pour point depressant composition, which comprises the steps of weighing N-phenyl methacrylamide-tetradecyl methacrylate, triethanolamine, span 80 and fatty alcohol-polyoxyethylene ether according to a metering ratio, mixing and stirring uniformly, and performing ultrasonic dispersion to obtain a target product.

Further, the temperature of mixing and stirring is 20-30 ℃, and the time of ultrasonic dispersion is 10-20 min.

The third technical scheme of the invention provides the application of the polar nitrogen-containing diesel pour point depressant composition, and when the polar nitrogen-containing diesel pour point depressant composition is used, the polar nitrogen-containing diesel pour point depressant composition is added into diesel oil, mixed and stirred uniformly, and then subjected to ultrasonic dispersion to complete the preparation.

Further, the mass ratio of the polar nitrogen-containing diesel pour point depressant composition to the diesel is 1: 100-1000.

Further, the temperature of mixing and stirring is 30-45 ℃, and the time of ultrasonic dispersion is 30 min.

Compared with the prior art, the invention has the following advantages:

(1) the N-phenyl methacrylamide-tetradecyl methacrylate plays a role of a main agent, the cold filter plugging point of the diesel oil is obviously reduced through the effects of eutectic crystal and adsorption, and the auxiliary agent span 80, triethanolamine and fatty alcohol-polyoxyethylene ether are good surfactants, so that the surface tension of an interface is reduced, and the interface is better dispersed.

(2) The preparation method only needs to carry out ultrasonic dispersion on an ultrasonic processor, and has the advantages of simple preparation process, convenient operation and obvious effect.

(3) The dispersibility of the pour point depressant in the 0# diesel sold in the market can be improved, the condensation point of the pour point depressant can be reduced by 22-26 ℃, and the cold filter plugging point can be reduced by 8-12 ℃.

Detailed Description

The present invention will be described in detail with reference to specific examples. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

The method for measuring the cold filter plugging point is carried out according to SH/T0248-2006 method for measuring the cold filter plugging point of diesel oil and civil heating oil, and the method for measuring the condensation point is carried out according to GB510-83 method for measuring the condensation point of petroleum products.

The raw materials used in the invention are as follows:

the N-phenyl methacrylamide-tetradecyl methacrylate is obtained by reacting N-phenyl methacrylamide and tetradecyl methacrylate at a monomer molar ratio of 1:10 at a reaction temperature of 120 ℃, toluene as a solvent and benzoyl peroxide as an initiator for 8 hours.

The remainder, unless otherwise indicated, are all conventional commercial materials or conventional processing techniques in the art.