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Multifunctional diesel oil cetane number improver and preparation method thereof

A cetane number and improver technology, which is applied in the petroleum industry, fuel additives, liquid carbon-containing fuels, etc., can solve the problems of affecting the quality of diesel oil, inconvenient use, and low total yield, so as to reduce fuel consumption and prolong The effect of service life and product quality stability

Active Publication Date: 2016-02-03
CESTOIL IND SERVICES SHENZHEN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of improver has the following problems: 1) whether it is extracted from plants or chemically synthesized, the cost is very high; 2) due to the long conjugated chain structure in the molecular structure, it is easy to be oxidized by air, usually need to add stabilizers or use Inert gas protection is inconvenient to use, and the addition of too much stabilizer (antioxidant) will have an adverse effect on the combustion process of diesel; 3) Dark color will affect the appearance of diesel
People such as J.B.Davis have used the method of chemical synthesis to prepare lycopene (J.Chem.Soc.C., 1966,2154), wherein there are 12 steps in synthesizing phytoene, and the total yield is low. Some expensive or dangerous reagents are involved, so the synthesis process is not an economically feasible and effective way to prepare phytoene

Method used

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  • Multifunctional diesel oil cetane number improver and preparation method thereof
  • Multifunctional diesel oil cetane number improver and preparation method thereof
  • Multifunctional diesel oil cetane number improver and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1 (synthesis of hydrocarbon I)

[0054] Add 38.6g of linalool, 9.9g of pyridine and 150ml of petroleum ether in a four-necked flask, N 2 Protect, stir, cool down to -10°C with an ice-salt bath, add 33.83g of phosphorus tribromide dropwise, and then stir at constant temperature for 8h. After the reaction, add saturated brine and n-hexane, extract, wash with water until neutral, then dry with anhydrous sodium sulfate, filter, and finally remove the solvent by rotary evaporation under reduced pressure to obtain brominated hydrocarbons for later use; in another four-necked flask Add 16.8g of potassium hydroxide, dissolve it with a small amount of water, then add 100ml of isopropanol and 26.73g of nitropropane, stir for 30min, add 0.15mol of spare brominated hydrocarbon dropwise, react at room temperature for 4h, after the reaction, add Saturated saline and n-hexane, extracted, washed with water until neutral, then dried with anhydrous sodium sulfate, filtered, a...

Embodiment 2

[0061] Embodiment 2 (synthesis of hydrocarbon II)

[0062] Add 38.6g of linalool and 2.55g of aluminum isopropoxide into a three-necked flask, blow nitrogen, stir, raise the temperature to 150°C, add dropwise 31.93g of methyl acetoacetate, and react at 180°C for 3h. After the reaction, vacuum distillation Excess methyl acetoacetate was removed to obtain ketone, which was set aside.

[0063] Add 50g of triethyl phosphite into a four-neck flask, blow nitrogen, stir, raise the temperature to 120°C, add 21.4g of 1,4-dibromo-2-butene dropwise, and condense for 8 hours. After the reaction is over, distill off the excess under reduced pressure. triethyl phosphite to obtain diphosphate, which is set aside.

[0064] Add 9.95g spare diphosphate and 150ml THF into a four-neck flask, add 8.4g potassium tert-butoxide in batches at 0°C, stir, cool down to -5°C in an ice-salt bath, add 0.075mol spare ketone dropwise, and keep the temperature constant After stirring for 8 hours, it was wash...

Embodiment 3

[0069] Embodiment 3 (compound and evaluation)

[0070] The hydrocarbons Ia, Ib, IIa, IIb prepared by the above examples are mixed with the traditional cetane number improver alkyl nitrate and oxalate in proportion, and then added to the compound produced by a refinery in North China In diesel oil, the CN of additive diesel oil was determined according to the method of ASTM D6890, and the improvement effect of cetane number of diesel oil was compared.

[0071] The influence of table 3 composition hydrocarbon content on improving cetane number

[0072] sample

CN

0.1% cyclohexyl nitrate

45.0

0.099% cyclohexyl nitrate + 0.001% Ia

46.7

0.098% cyclohexyl nitrate + 0.002% Ia

47.8

0.095% cyclohexyl nitrate + 0.005% Ia

48.1

0.09% cyclohexyl nitrate + 0.01% Ia

48.5

[0073] 0.08% cyclohexyl nitrate + 0.02% Ia

48.8

[0074] As can be seen from the data in the table, 1) hydrocarbon and cyclohe...

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PUM

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Abstract

The invention discloses a multifunctional diesel oil cetane number improver, relates to a diesel oil additive and concretely relates to synthesis and compound of a hydrocarbon as a diesel oil cetane number improver and an anti-oxidant. The invention provides a preparation method of the lycopene hydrocarbon. The preparation method has simple processes and a low cost. The multifunctional diesel oil cetane number improver comprises 1-20% of the hydrocarbon and 80-99% of a traditional cetane number improver. The composition has the advantages of 1, simple and safe synthesis technology, 2, light product color and high stability and 3, good compound effects.

Description

technical field [0001] The invention relates to a diesel additive, in particular to the synthesis and compounding of a hydrocarbon used as a diesel cetane number improver and antioxidant. technical background [0002] The cetane number is an important quality index indicating the combustion performance and anti-knock performance of diesel oil, and its size has an important impact on engine cold start, pollutant emission, fuel consumption and working noise. To a certain extent, the higher the cetane number of diesel oil, the shorter its flame delay period, the lower the spontaneous combustion temperature of diesel oil, and the better the combustion performance of diesel oil. Diesel has a long ignition delay period, and more diesel is injected into the cylinder before the ignition delay. A large amount of diesel oil is burned at the same time during spontaneous combustion, resulting in a sharp increase in the pressure and temperature in the cylinder, knocking on the cylinder, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/16C10L1/185C10L1/23C10L1/19C10L10/12
CPCC10L1/16C10L1/185C10L1/19C10L1/23C10L10/12
Inventor 熊靓严斌张捷
Owner CESTOIL IND SERVICES SHENZHEN CO LTD
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