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Reagent for reducing condensation point of diesel, and preparation method and application thereof

A technology of condensation point and diesel oil, which is applied in the petroleum industry, fuel additives, liquid carbon-containing fuels, etc., can solve the problems of restricting the use of diesel oil and losing fluidity of diesel oil, and achieve the effect of low cost, fewer types of raw materials, and less dosage

Active Publication Date: 2019-08-06
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

N-alkanes are closely related to the low-temperature fluidity of diesel oil. When the temperature decreases, the solubility in diesel oil begins to precipitate in the form of crystals, which grow continuously and finally form a three-dimensional network structure, thereby making diesel oil lose fluidity and greatly Restricted use of diesel

Method used

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  • Reagent for reducing condensation point of diesel, and preparation method and application thereof
  • Reagent for reducing condensation point of diesel, and preparation method and application thereof
  • Reagent for reducing condensation point of diesel, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A reagent for lowering the condensation point of diesel oil, consisting of myristyl methacrylate-N-vinylpyrrolidone copolymer. Its preparation method is:

[0048](1) there-necked flask is put into the constant temperature magnetic stirrer that thermometer, reflux condenser, water separator are housed, add 20.74g (0.096mol) tetradecyl alcohol, 0.01844g inhibitor hydroquinone, 30ml toluene, Raise the temperature to 60°C to dissolve everything, then quickly add 9.996g (0.116mol) of methacrylic acid and 0.3688g p-toluenesulfonic acid weighed, raise the temperature to 90°C for 1 hour, and continue to raise the temperature to 125°C for 5 hours under reflux. After the reaction, cool to room temperature, pour into a separatory funnel, wash three times with 5% NaOH to weak alkalinity, then wash three times with distilled water to neutrality, stand to separate layers to remove the bottom liquid, and pour the upper layer into a circular The bottom flask was evaporated at 50° C. w...

Embodiment 2

[0051] A reagent for lowering the condensation point of diesel oil, as shown in formula (I), is a copolymer formed by the polymerization of tetradecyl methacrylate and N-vinylpyrrolidone. The molecular Mw of the polymer tested by GPC was 71000 g / mol, the Mn was 31540 g / mol, and the Mw / Mn was 2.251. Its preparation method is similar to that of Example 1, except that 8.7676g (0.03mol) of tetradecyl methacrylate and 1.15g (0.01mol) of N-vinylpyrrolidone are added in step (2).

Embodiment 3

[0053] The diesel pour point depressants prepared in the above examples 1-2 were numbered 1 and 2 respectively, and were added to Songjiang 0# diesel at 0.025%-0.2% of the total mass of diesel, and ultrasonicated at 40°C for 30 minutes. Measure its condensation point according to GB / T510-1991, and measure its cold filter point according to SH / T0248-2006. Take the average of the two results of repeated determinations. Add the 0# diesel oil freezing point and the cold filter point test result of the diesel oil pour point depressant gained in embodiment 1-2 as shown in the table.

[0054]

[0055] As can be seen from the above, the pour point depressant of Example 1-2 has a good pour point depressant effect on 0# diesel oil, and the pour point depressant of the present invention has a significant effect on reducing the condensation point of diesel oil and the cold filter point, and the highest condensation point is reduced by 24°C , the cold filter point decreased by 3°C.

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Abstract

The invention provides a reagent for reducing the condensation point of diesel, and a preparation method and an application thereof. The reagent for reducing the condensation point of diesel comprisesa tetradecyl methacrylate-N-vinylpyrrolidone copolymer, or comprises the tetradecyl methacrylate-N-vinylpyrrolidone copolymer and a tetradecyl methacrylat-N-vinylimidazole copolymer. The above polymer diesel pour point depressant can further improve the low-temperature fluidity of the diesel, and has the advantages of simple synthesis method, small dosage, and small use amount of raw materials. The condensation point of diesel containing the reagent is 24-26 DEG C less than that of diesel free from the pour point depressant, and the cold filter plugging point of the diesel containing the reagent is 9-11 DEG C less than that of the diesel free from the pour point depressant, so that the diesel has a good fluidity at a low temperature.

Description

technical field [0001] The invention relates to a reagent for lowering the condensation point of diesel oil and its preparation and application, belonging to the technical field of pour point depressants. Background technique [0002] Diesel oil is a middle distillate obtained by fractional distillation of crude oil, including a variety of hydrocarbons including normal paraffins, isoparaffins, aromatic hydrocarbons and naphthenes. N-alkanes are closely related to the low-temperature fluidity of diesel oil. When the temperature decreases, the solubility in diesel oil begins to precipitate in the form of crystals, which grow continuously and finally form a three-dimensional network structure, thereby making diesel oil lose fluidity and greatly Diesel use is restricted. [0003] Adding a pour point depressant has also become a popular method. When a small amount of pour point depressant is added to diesel oil, it can effectively delay the crystallization temperature and change...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/236C10L10/14C08F220/18C08F226/10
CPCC08F220/18C08F220/1818C10L1/2368C10L10/14C10L2250/04C10L2270/026C10L2300/20C08F226/10
Inventor 韩生杨太顺解麦莹殷素雅陈凤飞薛原蒋继波余焓周明安
Owner SHANGHAI INST OF TECH
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