Preparation method of environment-friendly diesel oil pour point depressant

A diesel pour point depressant, an environmentally friendly technology, applied in the field of preparation of environmentally friendly diesel pour point depressant, can solve problems such as poor effect

Inactive Publication Date: 2014-04-09
关平 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ethylene, vinyl acetate copolymer diesel pour point depressant has a relatively high freezing point, and the effect is relatively poor

Method used

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  • Preparation method of environment-friendly diesel oil pour point depressant

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] An environmentally-friendly method for preparing an environmentally friendly diesel pour point depressant. After the stainless steel autoclave is qualified by replacing it with nitrogen, the stainless steel autoclave is evacuated to a vacuum of 0.02MPa, and then the solvent cyclohexane is sucked in, followed by vinyl acetate and styrene. , 20wt% of the respective amount of initiator tert-butyl hydrogen peroxide, increase the temperature while stirring, and at the same time pass in 20wt% of the amount of ethylene monomer to reach the set reaction temperature of 100°C and pressure of 6.0MPa, then within 2 to 2.5h Pump in 80wt% of the above substances in order to control the reaction speed; react at 110℃ for 4~5h to obtain a yellow viscous liquid. After cooling, vent the ethylene and extract the reaction solution. The unreacted vinyl acetate monomer and part of the solvent are recovered by pressure distillation, the polymer is precipitated with absolute ethanol at room tempe...

Embodiment 2

[0014] An environmentally-friendly method for preparing an environmentally friendly diesel pour point depressant. After the stainless steel autoclave is qualified by replacing it with nitrogen, the stainless steel autoclave is evacuated to a vacuum of 0.02MPa, and then the solvent cyclohexane is sucked in, followed by vinyl acetate and styrene. , 20wt% of the respective amount of initiator tert-butyl hydrogen peroxide, increase the temperature while stirring, and at the same time pass in 20wt% of the amount of ethylene monomer to reach the set reaction temperature of 115°C and pressure of 7.2MPa, within 2 to 2.5 hours Pump in 80wt% of the above-mentioned substances in order to control the reaction rate; react at 115℃ for 4~5h to obtain a yellow viscous liquid. After cooling, vent the ethylene and draw out the reaction solution. The reaction solution is reduced at 0.05MPa and 60℃. The unreacted vinyl acetate monomer and part of the solvent are recovered by pressure distillation, ...

Embodiment 3

[0017] An environmentally-friendly method for preparing an environmentally friendly diesel pour point depressant. After the stainless steel autoclave is qualified by replacing it with nitrogen, the stainless steel autoclave is evacuated to a vacuum of 0.02MPa, and then the solvent cyclohexane is sucked in, followed by vinyl acetate and styrene. , 20wt% of the respective amount of initiator tert-butyl hydrogen peroxide, increase the temperature while stirring, and at the same time pass in 20wt% of the amount of ethylene monomer to reach the set reaction temperature of 120°C and pressure of 7.8MPa, and then within 2 to 2.5h Pump in 80wt% of the above-mentioned substances in order to control the reaction rate; react at a constant temperature of 120°C for 4 to 5 hours to obtain a yellow viscous liquid. After cooling, vent the ethylene and extract the reaction solution. The reaction solution is reduced at 0.05MPa and 60°C. The unreacted vinyl acetate monomer and part of the solvent a...

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Abstract

The invention provides a preparation method of an environment-friendly diesel oil pour point depressant. The preparation method comprises the following steps: after nitrogen displacement of a stainless steel autoclave is qualified, vacuumizing the stainless steel autoclave, firstly inhaling cyclohexane and then inhaling 20wt% of total vinyl acetate, 20wt% of total styrene and 20wt% of total initiator tert-butyl hydroperoxide respectively, heating the materials under stirring, simultaneously pumping 20wt% of total vinyl monomer gas, pumping the remainders of the above substances in sequence in the time, 1 / 2 of the time required by reaction when the reaction temperature is 100-140 DEG C and the reaction pressure is 6.0-9.0MPa, thus controlling the reaction speed, maintaining the substances at a constant temperature of 100-140 DEG C for 4-5 hours, venting ethylene after cooling, extracting the reaction solution, recovering the unreacted vinyl acetate monomers and partial solvents through reduced pressure distillation, precipitating a polymer with absolute ethyl alcohol under normal temperature, taking out the precipitate through filtration, dissolving the precipitate with cyclohexane and carrying out precipitation and vacuum drying, thus obtaining the ethylene-styrene-vinyl acetate terpolymer environment-friendly diesel oil pour point depressant.

Description

Technical field [0001] The invention belongs to the field of diesel additives. It relates to a preparation method of an environmentally friendly diesel pour point depressant, Background technique [0002] At present, diesel pour point depressants (also known as diesel low-temperature fluidity improvers) developed at home and abroad are mainly binary and terpolymers in terms of chemical types. From the perspective of chemical structure, they are mainly comb-shaped molecules or fish bone molecules with a certain molecular weight and molecular weight distribution. Diesel low-temperature fluidity improvers mainly include the following categories: ethylene, vinyl acetate copolymers, terpolymers, acrylate polymers, copolymers of maleic anhydride, alkenyl succinic acid, etc. [0003] The condensation point of ethylene and vinyl acetate copolymer diesel pour point depressant is higher and the effect is relatively poor. Summary of the invention [0004] The purpose of the present inventio...

Claims

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Application Information

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IPC IPC(8): C08F218/08C08F212/08C08F210/02C10L1/197
Inventor 关平姜佳彤
Owner 关平
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