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Production method of naphthenic oil

A production method and technology for naphthenic oil, which are applied in the treatment of hydrocarbon oil, petroleum industry, hydrotreating process, etc., can solve the problems of high requirement of hydrotreating pretreatment of raw oil, high hydrogenation pressure, and complex overall process.

Active Publication Date: 2015-01-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the production of naphthenic oil by high-pressure hydrogenation by the all-hydrogen method can obtain naphthenic oil with a higher yield, the requirements for the hydrogenation pretreatment of the feedstock oil are relatively high, and multi-stage hydrogenation is required, and the hydrogenation pressure is relatively high. Atmospheric and vacuum fractionation is also required, and the overall process is more complicated

Method used

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  • Production method of naphthenic oil

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Experimental program
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Effect test

Embodiment 1

[0023] The second-line distillate oil of Suizhong 36-1 naphthenic crude oil is used as raw material, N-methylpyrrolidone is used as solvent, the volume ratio of solvent N-methylpyrrolidone and the second-line distillate oil of naphthenic crude oil is 1.0:1, and mixed Evenly, put it in a settling tank for constant temperature sedimentation and layering. The settling temperature is 50°C and stay for 30 minutes to obtain the upper liquid and the lower liquid. The refined oil is obtained after recovery of the solvent N-methylpyrrolidone by pressure distillation. Then use the refined oil as the raw material, carry out the hydrofining reaction in the reactor, the catalyst is RN-32, the weight ratio of the catalyst to the refined oil is 0.2:1, the reaction temperature is 350°C, the hydrogenation pressure is 10MPa, the reaction time After 2 hours, the liquid after the reaction was simply stripped and filtered to obtain a colorless and transparent naphthenic oil.

Embodiment 2

[0025] The third-line distillate oil of Suizhong 36-1 naphthenic crude oil is used as raw material, and furfural is used as solvent. The volume ratio of solvent furfural and the third-line distillate oil of naphthenic crude oil is 1.2:1. Constant temperature sedimentation and stratification, settling temperature 55°C, residence time 1h, to obtain the upper liquid and the lower liquid, the lower liquid was distilled under reduced pressure at 20 Torr to recover the solvent to obtain extracted oil, and the upper liquid was distilled under reduced pressure at 20 Torr to recover the solvent furfural to obtain refined oil . Then use the refined oil as the raw material, carry out the hydrofining reaction in the reactor, the catalyst is RN-32, the weight ratio of the catalyst to the refined oil is 0.25:1, the reaction temperature is 350°C, the hydrogenation pressure is 10MPa, the reaction time After 2 hours, the liquid after the reaction was simply stripped and filtered to obtain a co...

Embodiment 3

[0027] The second-line distillate oil of Suizhong 36-1 naphthenic crude oil is used as the raw material, and N-methylpyrrolidone is used as the solvent. The volume ratio of solvent N-methylpyrrolidone and the second-line distillate oil of naphthenic crude oil is 1.5:1. Uniformity, placed in a settling tank for constant temperature sedimentation and stratification, settling temperature 55 ° C, residence time 30 minutes, to obtain the upper liquid and lower liquid, the lower liquid was distilled under reduced pressure at 50 Torr to recover the solvent to obtain the extracted oil, the upper liquid was decompressed at 50 Torr The refined oil is obtained after recovering the solvent N-methylpyrrolidone by distillation. Then use the refined oil as the raw material, carry out the hydrofining reaction in the reactor, the catalyst is RN-32, the weight ratio of the catalyst to the refined oil is 0.2:1, the reaction temperature is 360°C, the hydrogenation pressure is 10MPa, the reaction t...

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Abstract

The invention relates to a production method of naphthenic oil. With a reduced-pressure distillate oil of a crude naphthenic oil as a raw material, the production method includes following steps: (1) preparing a purified oil in a manner of solvent purification; and (2) removing polycyclic aromatic hydrocarbon from the purified oil in the step (1) in a manner of hydrofining for producing the naphthenic oil which is transparent. The naphthenic oil is less than 1 ppm in the content of benzopyrene and is less than 10 ppm in a total weight of eight polycyclic aromatic compounds. The naphthenic oil can satisfy an environmental protective standard requirement of European Union completely and has a CN value being more than 45%.

Description

technical field [0001] The invention relates to a production process of extender oil in the rubber industry, in particular to a production process of naphthenic oil. Background technique [0002] Aromatic rubber extender oils are mainly used for tire rubber filling. However, recently, the European Union and other countries have strengthened the restrictions on the content of polycyclic aromatic hydrocarbons in tires, so that tire manufacturers exporting tire products to the above countries are facing huge environmental pressure. Although naphthenic oil is slightly inferior to aromatic hydrocarbons in polarity, it is much higher than paraffin-based oils. It can replace aromatic-based extender oils as styrene-butadiene rubber, natural rubber, isoprene rubber and butadiene rubber. of plasticizers. As the use of aromatic-based extender oils is increasingly restricted due to toxicity, naphthenic oils are receiving increasing attention as an alternative to aromatic-based rubber e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/04C08L21/00C08K5/01
CPCC08L21/00C08L91/00C10G67/04
Inventor 徐骏廉勇张洁张斌孙研曹路
Owner CHINA PETROLEUM & CHEM CORP
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