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Method for preparing diesel depressant

A technology of diesel pour point depressant and solvent, which is applied in the field of preparation of diesel pour point depressant, which can solve the problems of high power consumption, inability to transport, and high viscosity in crude oil transportation, and achieve reduced energy consumption, excellent cooling filter point and pour point depressant Point Performance, Single and Yield High Effects

Inactive Publication Date: 2011-08-17
吉化集团吉林市星云化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] my country is rich in high-wax base crude oil, and paraffin base crude oil accounts for more than 70% of the total output. The high freezing point and high viscosity will cause high power consumption in crude oil transportation, and it cannot be transported without technical means.

Method used

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  • Method for preparing diesel depressant
  • Method for preparing diesel depressant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] In the reactor with stirring, put part of toluene, stir, raise the temperature to 85°C and keep the temperature constant, and at the same time, fill the reactor with nitrogen to 0.6MPa, and keep this pressure all the time. Prepare vinyl acetate, maleic anhydride, polymethacrylate fatty ester and toluene, according to the ratio of mass ratio 1:1.0:2.0:2.0, use the metering pump to transport the uniformly mixed preparation solution into the reaction kettle, and inject the composite initiator , to carry out the polymerization reaction. Here, vinyl acetate: composite initiator is by mass ratio 1: 0.06, and composite initiator is benzoyl peroxide and azodiisobutyronitrile, forms by the ratio of mass ratio 1: 0.05, and reaction mass is in After reacting in the reactor for 4 hours, put the discharged material into the still, and distill off the unreacted monomer and solvent, and the residue is the terpolymer.

Embodiment 2

[0015] In a stirred reactor, put some toluene, stir, raise the temperature to 100°C and keep the temperature constant, and at the same time, fill the reactor with nitrogen to 0.6MPa, and keep this pressure all the time. Prepare vinyl acetate, maleic anhydride, polymethacrylic fatty ester and toluene, and use a metering pump to transport the uniformly mixed preparation solution to the reaction kettle according to the mass ratio of 1:2.0:1.0:2.0, and add the composite initiator dropwise , to carry out the polymerization reaction. Here, vinyl acetate: composite initiator is by mass ratio 1: 0.08, and composite initiator is benzoyl peroxide and azodiisobutyronitrile, forms by the ratio of mass ratio 1: 0.08, and reaction mass is in After reacting in the reactor for 4 hours, put the discharged material into the still, and distill off the unreacted monomer and solvent, and the residue is the terpolymer.

Embodiment 3

[0017] In the reactor with stirring, put part of toluene, stir, raise the temperature to 80°C and keep the temperature constant, and at the same time, fill the reactor with nitrogen to 0.6MPa, and keep this pressure all the time. Prepare vinyl acetate, maleic anhydride, polymethacrylic fatty ester and toluene, according to the ratio of mass ratio 1: 1.0: 1.0: 2.0, use a metering pump to transport the uniformly mixed preparation solution to the reactor, and add the composite initiator dropwise , to carry out the polymerization reaction. Here, vinyl acetate: composite initiator is by mass ratio 1: 0.1, and composite initiator is benzoyl peroxide and azodiisobutyronitrile, forms by the ratio of mass ratio 1: 0.1, and reaction mass is in After reacting in the reactor for 4 hours, put the discharged material into the still, and distill off the unreacted monomer and solvent, and the residue is the terpolymer.

[0018] 0.6 grams of the above-mentioned terpolymer dry agent and 0.2 gr...

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Abstract

The invention discloses a method for preparing diesel, in particular to a method for preparing diesel depressant. The method is characterized by comprising the following steps: adding vinylacetate, maleic anhydride and poly methyl methacrylate fatty ester mixture solution to a reaction vessel with stirring and heating devices; dropwise adding compound initiator to a reaction filled with methylbenzene, heating the reaction vessel to 70-120 DEG C, introducing nitrogen until the pressure in the reaction vessel is 0.4-0.9 Mpa, enabling the materials react for 3.5-5.5 hours, putting discharged materials to a distillation vessel, distilling unreacted monomers and solvent to obtain the residual which is vinylacetate, maleic anhydride and poly methyl methacrylate fatty ester ternary copolymer, and preparing the vinylacetate, maleic anhydride and poly methyl methacrylate fatty ester ternary copolymer into the dry diesel depressant. Compared with the prior art, the diesel depressant has more excellent cold filter plugging point and solidifying point decreasing properties. Because the compound initiator is adopted, the reaction temperature is reduced, thus the energy consumption is reduced. Compared with the prior art, the method has the characteristics of low reaction pressure, simple process and obvious decrease of cold filter plugging point of a product, and saves energy.

Description

technical field [0001] The invention relates to a preparation method of a diesel pour point depressant. Background technique [0002] Diesel pour point depressant, also known as diesel flow improver, has important applications in petroleum refining and transportation industries. Since the carbon number of hydrocarbons contained in diesel oil is between 10 and 20, according to the mechanism of pour point depressant, the length of the side chain must be similar to that of the wax in the oil, which is conducive to the eutectic of the two, and the length of the side chain of the added ester It is beneficial to solvation only when it is similar to the main component of the oil. [0003] my country is rich in high-wax base crude oil, and paraffin base crude oil accounts for more than 70% of the total output. The high freezing point and high viscosity will cause high power consumption in crude oil transportation, and it cannot be transported without technical means. The pour poin...

Claims

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Application Information

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IPC IPC(8): C08F265/06C10L1/197
Inventor 于广臣刘淑杰耿风鹏
Owner 吉化集团吉林市星云化工有限公司
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