Preparation method of CO2-based lubricant base oil
A technology for lubricants and base oils, applied in the preparation of CO2-based lubricant base oils, can solve problems such as poor product structure controllability, and achieve good lubricity, thermal oxidation stability, clear structure, and low equipment requirements. Effect
Inactive Publication Date: 2013-02-20
TIANJIN NANKAI UNIV CASTOR ENG SCI & TECH
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The raw materials are directly mixed for reaction, and the controllability of the product structure is poor
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[0028] a CO 2 The preparation method of base lubricant base oil, the CO 2 The chemical structure formula of base lubricant base oil is (CH 3 ) 2 C(CH 2 OCOOC 8 h 17 ) 2 , its preparation method is to use neopentyl glycol, dimethyl carbonate and n-octanol as raw materials, and adopts multi-step reaction preparation, and the steps are as follows:
[0029] 1) the first step is that dimethyl carbonate and n-octanol carry out transesterification:
[0030] In a three-necked flask equipped with a reflux condenser and a thermometer, add 37.35 g of n-octanol, 51.39 g of dimethyl carbonate and 0.3 g of sodium methoxide, heat the reaction, and reflux for 1 hour to obtain a high-content asymmetric dialkyl carbonate. Product, using gas chromatography to quantitatively analyze n-octanol, octyl methyl carbonate (asymmetric dialkyl carbonate) and dioctyl carbonate by normalization method, the detected product composition is: n-octanol 23.67%, asymmetric Dialkyl carbonate 70.75%, dioct...
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Abstract
Disclosed is a preparation method of CO2-based lubricant base oil. Polyatomic alcohol, low-molecular-weight carbonic dialkyl ester and aliphatic mono-alcohol are used as raw materials. The preparation method includes multiple steps: firstly, subjecting the low-molecular-weight carbonic dialkyl ester and the aliphatic single-methanol to ester exchange reaction under action of an alkali catalyst; secondly, adding the polyatomic alcohol into a product obtained in the first step to carry out secondary ester exchange reaction so as to obtain a rough product; and finally, refining the rough product by absorbents. The preparation method has the advantages that the preparation method is simple, easy to operate and implement, can be completed on mild conditions, has low requirements for equipment; the raw materials are clean and nontoxic, three-waste pollution in production is avoided, and environmental protection is achieved; the CO2-based lubricant base oil prepared by the method has clear structure and good controllability, good lubricity and thermal oxidation stability, and can be applied to lubrication fields such as engine oil, gear oil and rolling oil.
Description
technical field [0001] The present invention relates to lubricant base oil and preparation method thereof, especially a kind of CO 2 Process for the preparation of base lubricant base oils. Background technique [0002] Carbonates are a class of lubricant base oils with great development potential because their raw materials are derived from CO 2 , methanol, ethanol, such as dimethyl carbonate (DMC) derived from CO 2 , so the carbonate is called CO 2 base lubricant. According to literature reports, the United States, Germany, Italy and other countries have carried out research on high carbon chain dialkyl carbonate as lubricating oil base oil, and the results show that dialkyl carbonate is a kind of CO with excellent performance. 2 The base lubricant base oil has the characteristics of good lubricity, not easy to coke and less carbon deposit, which is superior to the current mineral oil and traditional synthetic base oil. Carbonate is actually an ester oil, but its acid...
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IPC IPC(8): C07C68/06C07C69/96C10M105/48
Inventor 叶锋崔晓莹王庆瑞张巳龙何良年
Owner TIANJIN NANKAI UNIV CASTOR ENG SCI & TECH