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Low temperature flowing additive for diesel oil

A low-temperature flow and additive technology, which is applied in the field of additives to improve the low-temperature flow properties of diesel oil, can solve the problems of limiting the temperature range of diesel oil, blocking the engine filter, and losing the fluidity of diesel oil. , The effect of improving low temperature fluidity

Inactive Publication Date: 2004-02-11
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main reason affecting the low-temperature fluidity of diesel oil is: the diesel fraction contains paraffin hydrocarbons. When the temperature drops, the solubility of paraffin hydrocarbons in the fractions decreases, and paraffin wax precipitates from the oil, which blocks the engine filter and eventually causes the diesel oil to lose fluidity, thereby Limits the operating temperature range of diesel
[0005] In order to improve the low-temperature flow performance of diesel oil, many companies have developed corresponding technologies for improving low-temperature flow performance according to the characteristics of different diesel oils, and achieved good results in practical applications, but there are problems such as poor adaptability and poor effect of improving cold filter point.
Such as: DE4040228 contains ethylene, vinyl acetate, good pour point depressant effect, but poor filter depressant effect
The additive synthesized by DE4333680, due to its large molecular weight and poor oil solubility, the filter reduction effect is not obvious

Method used

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  • Low temperature flowing additive for diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Put 200ml of cyclohexane into a 500ml autoclave, add 20ml of vinyl acetate, 1g of methacrylate or acrylate, and 1g of lauryl peroxide, and then heat up to 90°C. Inject ethylene to make the pressure reach 10.0MPa. After the reaction started, the temperature was kept at 90°C. The reaction was carried out for 4.5h, and the material was discharged. Polymer A1 was obtained after distillation under normal pressure at 124°C.

[0028] 2) Pentaerythritol 20.4g, C 16 ~C 24 Mix 150 g of organic mixed carboxylic acid and 0.5 g of p-toluenesulfonic acid catalyst to obtain ester B1.

[0029] 3) A1, B1 and amines are formulated in a weight ratio of 15:0.7:0.3 to obtain additive 1 # .

Embodiment 2

[0031] 1) Add 200ml of petroleum ether into a 500ml autoclave, add 20ml of vinyl acetate, 2g of methacrylate or acrylate, and 1g of azobisisobutyronitrile, and then heat up to 85°C. Inject ethylene to make the pressure reach 8.0MPa. After the reaction started, the temperature was kept at 85°C. The reaction was carried out for 4.5h, and the material was discharged. Polymer A2 was obtained after distillation at 128°C under normal pressure.

[0032] 2) Pentaerythritol 20.4g, C 16 ~C 24 Mix 150 g of organic mixed carboxylic acid and 0.5 g of p-toluenesulfonic acid catalyst to obtain ester B1.

[0033] 3) A2, B1 and amines are formulated at a weight ratio of 15:0.8:0.5 to obtain additive 2 # .

Embodiment 3

[0035] 1) Put 200ml of cyclohexane into a 500ml autoclave, add 40ml of vinyl acetate, 4g of methacrylate or acrylate, and 1g of azobisisobutyronitrile, and then heat up to 85°C. Inject ethylene to make the pressure reach 8.0MPa. After the reaction started, the temperature was kept at 85°C. The reaction was carried out for 4.5h, and the material was discharged. Polymer A3 was obtained after distillation under normal pressure at 126°C.

[0036] 2) Pentaerythritol 20.4g, C 16 ~C 24 Mix 150 g of organic mixed carboxylic acid and 0.5 g of p-toluenesulfonic acid catalyst to obtain ester B1.

[0037] 3) A3, B1 and amines are formulated in a weight ratio of 15:1:0.2 to obtain additive 3 # .

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Abstract

The present invention provides a diesel oil low-temp. flow-property improving additive for improving condensation point and cold-filtering point of diesel oil. Said additive comprises the following components: (1) 90-99 wt% of three-component copolymer formed from ethylene-vinyl acetate-metacrylic acid ester or ethylene-vinyl acetate-acrylic ester; (2) 0.5-5 wt% of amine; and (3) 0.5-8 wt% of ester. The molecular weight of said three-component copolymer is 2000-4000. Besides, said invention also provides its general formula.

Description

Technical field: [0001] The invention relates to an additive for liquid fuel, in particular to an additive for improving low-temperature fluidity of diesel oil, which can effectively reduce the freezing point and cold filter point of diesel oil. Background technique: [0002] With the development of the world economy, the increase of vehicles, especially the dieselization of heavy-duty and medium-sized vehicles and the penetration of diesel engines into the field of light trucks and cars, the world's diesel production and consumption have surpassed gasoline and showed a continuous growth momentum. The demand is constantly increasing, and the domestic diesel output is far from meeting the market demand. Therefore, improving the output and quality of diesel oil has become one of the main problems to be solved urgently in the oil refining industry. [0003] There are many ways to increase diesel production: by adjusting operating parameters or changing processing routes, such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/18
Inventor 陈卫红王国良朱豫飞程国良张凡吴辰捷
Owner CHINA PETROCHEMICAL CORP