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Preparation method of diesel oil pour point depressant

A technology of diesel pour point depressant and initiator, which is applied in the petroleum industry, fuel additives, liquid carbon-containing fuels, etc. It can solve the problems of complex preparation process and poor pour point depressant ability, and achieve simple synthesis process and slow pour point depressant The effect of good coagulation ability and low cost

Inactive Publication Date: 2018-04-10
SHAANXI SHENGMAI PETROLEUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing binary polymer diesel pour point depressant has poor pour point depressant ability and complex preparation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of diesel oil pour point depressant, comprising the following steps:

[0021] (1) According to the mass ratio of 1.7:1:0.1:0.05:0.03, mix stearyl alcohol, maleic anhydride, toluene, p-toluenesulfonic acid, and hydroquinone, and stir and react at 60°C for 30 minutes;

[0022] (2) Ultrasonic disperse the product of step (1) for 30 minutes under the conditions of ultrasonic power 200W and frequency 50Hz, then react at 70°C for 4h, naturally cool to room temperature, and vacuum dry at 80°C for 3h, the obtained solid is Ma to anhydride ester;

[0023] (3) Mix maleic anhydride ester and polyethylene glycol, add initiator azobisisobutyronitrile, and react at 85°C for 7 hours under the protection of nitrogen; among them, maleic anhydride ester, polyethylene glycol, initiator The mass ratio of agent is 2:3:0.09;

[0024] (4) React in microwave for 30 minutes at a power of 200W, and cool naturally, and the obtained liquid is diesel pour point depressant.

Embodiment 2

[0026] A preparation method of diesel oil pour point depressant, comprising the following steps:

[0027] (1) According to the mass ratio of 1.7:1:0.1:0.05:0.03, mix stearyl alcohol, maleic anhydride, toluene, p-toluenesulfonic acid, and hydroquinone, and stir and react at 60°C for 50 minutes;

[0028] (2) Ultrasonic disperse the product of step (1) for 30min under the conditions of ultrasonic power 400W and frequency 30Hz, then react at 90°C for 3h, naturally cool to room temperature, and vacuum dry at 80°C for 3h, the obtained solid is Ma to anhydride ester;

[0029] (3) Mix maleic anhydride ester and polyethylene glycol, add initiator azobisisobutyronitrile, and react at 85°C for 9 hours under the protection of nitrogen; among them, maleic anhydride ester, polyethylene glycol, initiator The mass ratio of agent is 2:3:0.09;

[0030] (4) React in microwave for 30 minutes at a power of 200W, and cool naturally, and the obtained liquid is diesel pour point depressant.

Embodiment 3

[0032] A preparation method of diesel oil pour point depressant, comprising the following steps:

[0033] (1) According to the mass ratio of 1.7:1:0.1:0.05:0.03, mix stearyl alcohol, maleic anhydride, toluene, p-toluenesulfonic acid, and hydroquinone, and stir and react at 60°C for 45 minutes;

[0034] (2) The product of step (1) was ultrasonically dispersed for 30 minutes under the conditions of ultrasonic power 300W and frequency 40Hz, then reacted at 80°C for 3.4h, cooled naturally to room temperature, and dried in vacuum at 80°C for 3h, the obtained solid was Maleic anhydride esters;

[0035] (3) Mix maleic anhydride ester and polyethylene glycol, add initiator azobisisobutyronitrile, and react at 85°C for 7.5 hours under nitrogen protection; among them, maleic anhydride ester, polyethylene glycol, The mass ratio of initiator is 2:3:0.09;

[0036] (4) React in microwave for 30 minutes at a power of 200W, and cool naturally, and the obtained liquid is diesel pour point de...

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Abstract

The invention discloses a preparation method of a diesel oil pour point depressant, which comprises the following steps: (1) mixing stearyl alcohol, maleic anhydride, toluene, p-toluenesulfonic acid and hydroquinone, stirring and reacting at 60°C for 30- 50min; (2) ultrasonically disperse the product of step (1) for 30min, then react at 70-90°C for 3-4h, cool to room temperature naturally, and dry in vacuum, the obtained solid is maleic anhydride ester; (3) Mix maleic anhydride ester and polyethylene glycol, add an initiator, and react at 85°C for 7‑9h under the protection of nitrogen; (4) Microwave for 30 minutes, cool naturally, and the obtained liquid is diesel pour point depressant. The method provided by the invention has simple synthesis process, easy operation and low cost, can improve the utilization rate of maleic anhydride, has good pouring and retarding ability, can reduce the cold filter point of Fushun 0# diesel oil to -9°C, and the freezing point Lowering to ‑1.8°C, the acidity rose to 6.43.

Description

technical field [0001] The invention belongs to the technical field of pour point depressants, and in particular relates to a preparation method of diesel pour point depressants. Background technique [0002] Most of the diesel oil in my country is wax-containing diesel oil, especially in oil products with heavy fractions, the wax content is higher, and the composition, arrangement, and combination sequence of wax crystals are very important to the fluidity of diesel oil. Diesel pour point depressant is a kind of oil additive. Its specific relative molecular weight and molecular structure functional group can effectively control the growth trend and process of wax crystal molecules in diesel oil. It has the advantages of wide application range, small dosage and obvious effect. . Maleic anhydride itself has a certain pour point depressing effect, and contains highly unsaturated structural groups such as conjugated double bonds. Polyethylene glycol has polar functional group...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/196C10L10/14
CPCC10L1/1966C10L10/14
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM
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