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Marine fuel oil stability additive and preparation method thereof

A fuel oil and stability technology, applied in the field of fuel oil additives, can solve the problems of clogging the filter, high viscosity, and inability to use the blended oil normally, achieving strong adsorption and dispersibility, preventing self-association, and excellent fuel oil stability. effect of effect

Pending Publication Date: 2022-04-08
CNOOC TIANJIN CHEM RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Marine fuel oil is mainly made of petroleum cracking residue and straight run residue blending a certain amount of light oil (such as diesel oil). The residue component is characterized by high viscosity and contains many aromatic compounds, colloids, and asphaltene. The main components of light oil components such as diesel oil are alkanes containing 15-18 carbons, so when the residue oil and light diesel oil are blended into fuel oil, the atmosphere of aromatic compounds stabilizing asphaltene colloids in the residue oil is absorbed by the light oil. The relatively stable colloidal system of asphaltenes will be destroyed accordingly, so that colloids, asphaltenes, etc. will be easily separated out to form very viscous organic sediments, resulting in blended oils that cannot be used normally
At present, during the use of marine residual fuel oil, due to the instability of the oil system, precipitation and precipitation often occur in nozzles and cylinders, resulting in aggravated wear and corrosion of tight components such as fuel injection equipment and cylinders; excessive formation on oil purifiers and filters The oil residue will cause too much sludge in the oil purifier and block the filter; after a long time in the deep oil tank, a large amount of sludge will be deposited on the bilge, resulting in difficulty in pumping and many other problems

Method used

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  • Marine fuel oil stability additive and preparation method thereof
  • Marine fuel oil stability additive and preparation method thereof
  • Marine fuel oil stability additive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: the preparation of marine fuel oil stabilizer A

[0015] Add 100mL of dichloromethane into a 250mL three-necked flask, and slowly add 10.08g of succinic anhydride into the there-necked flask under uniform stirring, and the succinic anhydride will gradually dissolve under stirring conditions. Then weigh 7.36g C8-C10 tertiary alkyl primary amine and dissolve it in dichloromethane, then put it into a constant pressure funnel. At 10°C, the dichloromethane solution of C8-C10 tertiary alkyl primary amines was slowly added dropwise to the three-necked flask, and the reaction was continued for 5.0 h after the dropwise addition was completed. After the reaction, the white precipitate at the bottom of the bottle is the target product of amic acid, and the filtered filter cake is washed three times with dichloromethane, recrystallized with acetone, and vacuum-dried at 85°C for 24 hours to obtain the final amic acid product. Amic acid product 12.71g was weighed, and ...

Embodiment 2

[0016] Embodiment 2: the preparation of marine fuel oil stabilizer B

[0017] Add 100mL of dichloromethane into a 250mL three-necked flask, and slowly add 12.06g of succinic anhydride into the there-necked flask with uniform stirring, and the succinic anhydride will gradually dissolve under stirring conditions. Then weigh 8.75g C12-C14 tertiary alkyl primary amine and dissolve it in dichloromethane, then put it into a constant pressure funnel. At 15°C, the dichloromethane solution of C12-C14 tertiary alkyl primary amines was slowly added dropwise to the three-necked flask, and the reaction was continued for 6.0 h after the dropwise addition was completed. After the reaction, the white precipitate at the bottom of the bottle is the target product of amic acid, and the filtered filter cake is washed three times with dichloromethane, recrystallized with acetone, and vacuum-dried at 85°C for 24 hours to obtain the final amic acid product. 13.80 g of the amic acid product was weig...

Embodiment 3

[0018] Embodiment 3: the preparation of marine fuel oil stabilizer C

[0019] Add 100mL of dichloromethane into a 250mL three-necked flask, and slowly add 13.97g of succinic anhydride into the there-necked flask with uniform stirring, and the succinic anhydride will gradually dissolve under stirring conditions. Then weigh 10.12g C12-C14 tertiary alkyl primary amine and dissolve it in dichloromethane, then put it into a constant pressure funnel. At 30°C, the dichloromethane solution of C12-C14 tertiary alkyl primary amines was slowly added dropwise to the three-necked flask, and the reaction was continued for 7.0 h after the dropwise addition was completed. After the reaction, the white precipitate at the bottom of the bottle is the target product of amic acid. The filtered filter cake was washed three times with dichloromethane, recrystallized with acetone, and dried in vacuum at 85°C for 24 hours to obtain the final amic acid product. Amic acid product 14.42g was weighed, an...

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Abstract

The invention discloses a marine fuel oil stability additive. The marine fuel oil stability additive is of an alkyl amic acid structure. The preparation method of the additive comprises the following steps: slowly dropwise adding a dichloromethane solution of tertiary alkylamine into a dichloromethane solution of succinic anhydride, continuously reacting for 4-8 hours at 10-30 DEG C, filtering to obtain a filter cake, washing the filter cake with dichloromethane for 2-4 times after the reaction is finished, recrystallizing with acetone, and performing vacuum drying at 80-85 DEG C to obtain the additive, the marine fuel oil stability additive and asphaltene causing fuel oil precipitation have very strong adsorption and dispersion effects, so that the marine fuel oil stability additive has a remarkable fuel oil system stabilization effect, and the organic matter deposition rate of fuel oil can be reduced to 0.05% or below and is far superior to the technical index requirement of 0.1%.

Description

technical field [0001] The invention relates to the field of fuel oil additives, in particular to a stability additive for marine fuel oil and a preparation method thereof. Background technique [0002] Marine fuel oil is mainly made of petroleum cracking residue and straight-run residue oil blended with a certain amount of light oil (such as diesel oil). The main components of light oil components such as diesel oil are alkanes containing 15-18 carbons, so when the residue oil and light diesel oil are blended into fuel oil, the atmosphere of aromatic compounds stabilizing asphaltene colloids in the residue oil is absorbed by the light oil. The relatively stable colloidal system of asphaltenes is destroyed accordingly, so that colloids, asphaltenes, etc. are easily separated to form very viscous organic precipitates, which makes the blended oil unable to be used normally. At present, during the use of marine residual fuel oil, due to the unstable oil system, precipitation a...

Claims

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Application Information

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IPC IPC(8): C07C233/05C07C231/02C10L1/224
Inventor 赵迎秋黄占凯安峰
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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