Method for preparing alkyl naphthalene from mixed olefins and application of alkyl naphthalene

A technology of alkyl naphthalene and olefin, which is applied in the direction of base material, lubricating composition, petroleum industry, etc., can solve the problems of unenvironmental raw material olefin cost, difficulty in achieving alkyl naphthalene performance index, liquid catalyst corrosion equipment, etc. Achieve the effect of no waste water discharge

Pending Publication Date: 2021-09-14
SICHUAN LUTIANHUA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems in the background technology, the present invention provides a method for preparing alkylnaphthalene by mixing α-olefins and its application, which solves the problem that the performance of alkylnaphthalene prepared by using mixed olefins as raw materials in the prior art is difficult to reach single carbon The performance index of alkylnaphthalene prepared from several olefins also solves the technical problems of liquid catalyst corrosion equipment, non-environmental protection and high cost of raw material olefins in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, 278 g of n-decene, 104 g of α-olefins (the contents of C16 and C18 are 30% and 64% respectively), 60 g of naphthalene and 133 g of n-tetradecane were mixed and stirred, and 88.4 g of acid clay was added and heated at 175 °C. React for 12 h. The product is filtered and distilled to obtain alkylnaphthalene. In the reaction, the conversion rate of naphthalene was 99.2%, the product selectivity was 99.9%, and the product yield was 99.1%. The addition of the solvent n-tetradecane can be used as an internal standard to accurately obtain the conversion rate information of the reaction.

[0024] The color of the alkylnaphthalene product obtained in this example is bright yellow, the viscosity at 40°C is 98.32 cSt, the viscosity at 100°C is 12.30 cSt, the viscosity index is 118, the pour point is -36°C, the flash point is 232°C, and the chromaticity<1.0 , the acid value is 0.0 mgKOH / g, and the water content is 44.8 ppm.

[0025] The alkylated naphthalene product obtain...

Embodiment 2

[0030] First, mix and stir 278 g of n-decene, 104 g of α-olefins (the contents of C16 and C18 are 30% and 64% respectively), 60 g of naphthalene and 147 g of n-decane, add 88.4 g of acid clay, and react at 175 °C 12 h. The product is filtered and distilled to obtain alkylnaphthalene. Since the gas chromatograms of the solvent n-decane and the reactant n-decene overlap, information such as the conversion rate of the reaction cannot be accurately obtained by the internal standard method.

[0031] The color of the alkylnaphthalene product obtained in this example is bright yellow, the viscosity at 40°C is 95.09 cSt, the viscosity at 100°C is 11.92 cSt, the viscosity index is 116, the pour point is -33°C, the flash point is 240°C, and the chromaticity<1.5 , the acid value is 0.0 mgKOH / g, and the water content is 91.7 ppm.

[0032] The performance of the alkylnaphthalene obtained in Example 2 reaches the index of commercially available products.

Embodiment 3

[0034] First, mix and stir 268 g of n-decene, 100 g of α-olefins (the contents of C16 and C18 are 30% and 64% respectively), 74 g of naphthalene and 220 g of n-decane, add 88.4 g of acid clay, and react at 175 °C 12 h. The product is filtered and distilled to obtain alkylnaphthalene.

[0035] The color of the alkylnaphthalene product obtained in this embodiment is bright yellow, the viscosity at 40°C is 102.2 cSt, the viscosity at 100°C is 11.61 cSt, the viscosity index is 101, the pour point is -36°C, the flash point is 228°C, and the chromaticity<1.0 , the acid value is 0.0 mgKOH / g, and the water content is 90.4 ppm.

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Abstract

The invention belongs to the technical field of high-quality lubricant base oil, and particularly discloses a method for preparing alkyl naphthalene from mixed olefins and application of the alkyl naphthalene. The preparation method comprises the following specific steps: mixing reaction raw materials, namely mixed alpha-olefins and naphthalene, adding a solid acid catalyst and a solvent, and performing a high-temperature reaction to obtain a product. According to the invention, a plurality of mixed alpha-olefins are used for replacing an olefin with a single carbon number in a traditional process, and the alkyl naphthalene product is prepared through synergism of the catalyst and reaction conditions; and the alkyl naphthalene product is improved in the aspects of viscosity, pour point, flash point, chromaticity, acid value, water content and the like, and overcomes the technical bias that the performance of alkyl naphthalene prepared from mixed olefins in the prior art is difficult to reach the performance index of alkyl naphthalene prepared from an olefin with a single carbon number.

Description

technical field [0001] The invention belongs to the technical field of high-quality lubricating oil base oils, and in particular relates to a method and application for preparing alkylnaphthalene by mixing olefins. Background technique [0002] Fischer-Tropsch synthesis is an important way to realize clean and efficient utilization of coal resources. The main product in the iron-based Fischer-Tropsch reaction is olefins, and the high-value utilization of olefins needs to find a more scientific, reasonable and high-value-added new path. [0003] With the development of industry and strict environmental regulations, lubricating oil base oils based on mineral oil can no longer meet the demand. As the base oil of Class V lubricating oil, alkylnaphthalene has an electron-rich naphthalene ring that can capture the oxidative groups generated by the oxidation of hydrocarbon groups, making it difficult to form the entire oxidation chain, thereby preventing the oxidation process, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M109/02C10N20/02
CPCC10M109/02C10M2203/065C10N2020/02
Inventor 杜燕燕李久盛廖廷君赵永清李勇朱德林傅文佳倪杰
Owner SICHUAN LUTIANHUA
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