Agent for improving low temp. flowability of diesel

A low-temperature fluidity, improver technology, applied in the petroleum industry, liquid carbon-containing fuels, fuels, etc., can solve the problems of poor pour point depressant, inability to reduce the cold filter point, poor effect, etc., to achieve easy dissolving, manufacturing Simple process, safe to use

Inactive Publication Date: 2002-07-17
李鸿图
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PPDs work well for diesel produced from catalytic cracking diesel and naphthenic crudes, but poorly on diesel produced from straight-run diesel and paraffinic crudes
The domestic diesel pour point depressant T1804 is not effective in lowering the freezing point of paraffin-based straight-run diesel oil, and cannot lower its cold filter point at all.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A low-temperature fluidity improver for diesel oil, which is composed of 32% ethylene-vinyl acetate copolymer, 28% vinyl acetate-fumarate copolymer, 15% fatty acid ester containing hydroxyl, 15% oil-soluble fatty amine, It is prepared by mixing 10% of low-volatility and low-viscosity ester solvents. Percentages are by weight. Among them, vinyl acetate-fumarate copolymer, the fatty acid ester containing hydroxyl group is octadecyl laurate, the oil-soluble fatty acid amide is sorbitan oleate, and the ester solvent with low volatility and low viscosity is Dioctyl adipate.

[0022] Preparation

[0023] Put the components in the examples into a mixer, heat to 80°C, stir and mix evenly, cool to 50°C, filter and pack.

[0024] Diesel decondensation test

[0025] Composition of blended diesel oil: Straight-run diesel oil and catalytic diesel oil are 60% and 40% respectively. The test results are as follows:

[0026] Dosage, ppm 0 50 100 200 500

[0027] Freezing point, ℃ ...

Embodiment 2

[0030] A low-temperature fluidity improver for diesel oil is composed of 35% ethylene-vinyl ester copolymer, 20% vinyl acetate-fumarate copolymer, 20% fatty acid ester containing hydroxyl, 10% oil-soluble fatty amine, Low volatility and low viscosity ester solvent 15% (percentage is weight percent). Among them: vinyl acetate-fumarate copolymer is vinyl ester-fumarate stearyl ester copolymer, the fatty acid ester containing hydroxyl group is naphthenic acid stearylamide, and the oil-soluble fatty acid amide is lauryl Acid monoglycerides, and a low-viscosity ester solvent is dibutyl phthalate.

[0031] The preparation method is the same as in Example 1.

[0032] Diesel is diesel produced from naphthenic crude oil. The test results are as follows:

[0033] Dosage, ppm 0 100 500 1000

[0034] Freezing point, ℃ 1 -8 -18 -27

[0035] Cold filter point, ℃ 4 2 -2 -8

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PUM

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Abstract

The diesel oil low-temp. flowability improving agent contains (wt%) 10-70% of ethylene-vinyl acetate copolymer, 5-50% of vinyl acetate-trans-butenedioic acid ester copolymer, 1-40% of aliphatic ester containing hydroxide radical, 1-30% of oil-soluble fatty acylamide and 1-40% of low-volatility and low-viscosity ester-like solvent. Said invented diesel oil low-temp. flowability improving agent is a yellow viscous liquid, has no volatile solvent, and is easy to be dissolved in diesel oil, its addition quality is 0.1-0.01%. It possesses good applicability for all diesel oils, can reduce solidification point of diesel oil by 5-28 deg.C and cold filtering point by 1-12 deg.C.

Description

(1) Technical field [0001] The invention relates to a low-temperature fluidity improver for diesel oil, which can effectively reduce the freezing point and cold filter point of diesel oil. (2) Background technology [0002] Diesel oil contains wax. As the temperature of diesel oil decreases, the wax gradually crystallizes out, and the viscosity of diesel oil gradually increases. The crystallized waxes are connected to each other to form a three-dimensional network structure, and the oil is adsorbed in it, and the fluidity of diesel oil is reduced, and even completely loses fluidity. [0003] Mineral oil low temperature fluidity improver is also called pour point depressant. It is a class of organic compounds with a special molecular structure. Adding a pour point depressant to diesel oil can be absorbed and dissolved by wax, so that when the wax crystallizes out, it cannot form a network structure, but can only form fine crystals, which reduces the interaction between wax ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/18
Inventor 李鸿图
Owner 李鸿图
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