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Method for catalyzed synthesis of lubricating base oil from supported ionic liquid

A technology for synthesizing lubricating oil and ionic liquids, which is applied in chemical instruments and methods, preparation of organic compounds, catalytic reactions, etc., can solve unseen problems, achieve short reaction time, mild reaction conditions, and simplified processes

Inactive Publication Date: 2016-05-04
NANJING POLYTECHNIC INSITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, there are no technical inventions or academic research reports on the synthesis of lubricating base oils through esterification using supported ionic liquids prepared by impregnation or sol-gel methods as catalysts and solubilizers.

Method used

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  • Method for catalyzed synthesis of lubricating base oil from supported ionic liquid
  • Method for catalyzed synthesis of lubricating base oil from supported ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 (synthesis of ionic liquid) the preparation method of imidazole acetate ionic liquid

[0035] Weigh 8.21g of N-methylimidazole and 6.01g of acetic acid with a molar ratio of 1:1 into a 250ml three-necked flask, add 2ml of water as a solvent, rotate and stir, and control the temperature at 80°C. Under these conditions, the reaction was carried out for 6h, and a pale yellow liquid was obtained.

[0036] The obtained light yellow liquid was subjected to vacuum distillation, the vacuum degree of vacuum distillation was controlled to be 0.07MPa, the top temperature was 92°C, and the distillation time was 3h, to obtain the imidazole acetate ionic liquid [Hmim]CH 3 COO.

Embodiment 2

[0037] Embodiment 2 (synthesis of ionic liquid) preparation method of imidazolium n-butyrate ionic liquid

[0038] Weigh 8.21g of N-methylimidazole and 8.82g of n-butyric acid with a molar ratio of 1:1 in a 250ml three-necked flask, add 2ml of water as a solvent, stir with a magnetic stirrer, heat with an electric heating mantle, and reflux the condensed water. The reaction temperature was controlled at 80° C., and the reaction was carried out for 7 hours to obtain a yellow liquid.

[0039] The obtained liquid was subjected to vacuum distillation, the vacuum degree was controlled to be 0.05MPa, the top temperature was about 75°C, and the distillation time was 4h. That is, the imidazolium n-butyrate ionic liquid [Hmim]C 4 h 7 o 2 .

Embodiment 3

[0040] Embodiment 3 (synthesis of ionic liquid) the preparation method of imidazolium phosphate ionic liquid

[0041] Weigh 16.4g of N-methylimidazole and 19.6g of phosphoric acid with a molar ratio of 1:1 in a 250ml three-necked flask, add 3ml of water as a solvent, stir with a magnetic stirrer, heat with an electric heating mantle, and reflux the condensed water. For the reaction, the reaction temperature was controlled at 80° C., and the reaction was carried out for 7 hours to obtain a yellow liquid.

[0042] Distill the obtained liquid under reduced pressure, control the vacuum degree to 0.05MPa, the top temperature is about 75°C, and the distillation time is 3h, to obtain the imidazole phosphate ionic liquid [Hmim]H 2 PO 4 .

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Abstract

The present invention discloses a method for preparing lubricating base oil from supported ionic liquid. The method is characterized by using oleic acid and pentaerythritol as raw materials, and using a supported imidazole ionic liquid as a catalyst and a solvent. The present invention employs a dipping method or a sol-gel method for preparing the supported ionic liquid catalyst: addition amount of catalyst of 0.5%-3% of the total mole number of alcohol and acid, the reaction temperature of 130-160 DEG C, atmospheric pressure, and reaction time of 0.5-3 h. The method is characterized by no usage of concentrated sulfuric acid and hydrofluoric acid, which are pollute the environment. Compared to the traditional inorganic acid as an alcohol acid esterification catalyst, the supported ionic liquid has the advantages of mild reaction conditions, high catalytic activity, short reaction time, high esterification rate, simplified production process, simple catalyst recycling operation and reusability.

Description

technical field [0001] The invention relates to an organic chemical reaction method, in particular to a method for catalytically synthesizing lubricating base oil with a loaded ionic liquid. Background technique [0002] With the development of the modern chemical industry and the automobile industry, there is a great demand for lubricating oil. Therefore, people are paying more and more attention to the quality of oil products and the possible pollution to the environment caused by their preparation. Synthetic base oils refer to lubricating oil base oils synthesized by chemical methods. Compared with mineral oil, synthetic lubricating oil has the advantages of good thermal stability, high thermal decomposition temperature, and good low temperature resistance, and is currently a very important basic product in the chemical industry. There are many types of synthetic base oils, the most common being synthetic esters. The traditional alkyd esterification technology usually u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/58B01J31/02B01J31/04B01J31/26
CPCY02P20/584C07C67/08B01J31/0284B01J31/0292B01J31/26B01J2231/49C07C69/58
Inventor 汤立新张冠军蔡源季锦林李玉龙蒋丽芬张斌薛丽君
Owner NANJING POLYTECHNIC INSITUTE
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