Method for preparing alkyl naphthalene lubricant base oil from coal alpha-olefin

A technology of alkylnaphthalene lubricating oil and base oil, which is applied in the direction of lubricating compositions, base materials, petroleum industry, etc., can solve the problems of complex reaction process, easy deactivation of catalyst, and non-environmental protection of catalyst, and achieve remarkable economic benefits and avoid Use of high-pressure equipment to achieve clean and efficient utilization

Pending Publication Date: 2022-07-26
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing alkylnaphthalene base oil from coal-based α-olefins, which mainly solves the technical problems in the prior art that the catalyst is not environmentally friendly, the catalyst is easily deactivated, the reaction process is complicated, and the cost is high

Method used

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  • Method for preparing alkyl naphthalene lubricant base oil from coal alpha-olefin
  • Method for preparing alkyl naphthalene lubricant base oil from coal alpha-olefin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First, 154g of C16α-olefin, 80g of naphthalene and 140g of n-decane were mixed and stirred, 16g of Y zeolite was added, and the reaction was carried out at 165°C for 8h. The product is filtered and distilled to obtain alkylnaphthalene. In the reaction, the conversion rate of naphthalene was 87.5%, the product selectivity was 99.9%, and the product yield was 87.4%. The addition of the solvent n-decane can avoid the difficulty of stirring caused by the too high viscosity of the reaction system, and make the mixing more sufficient and the reaction more sufficient.

[0026] The color of the alkylnaphthalene product obtained in this example is light yellow, the viscosity at 40°C is 23.93cSt, the viscosity at 100°C is 4.285cSt, the viscosity index is 71, the pour point is -36°C, the flash point is 232°C, and the chromaticity is <0.5 , the acid value is 0.01mgKOH / g, and the water content is 185.3ppm.

Embodiment 2

[0028] First, 168g C16α-olefin, 80g naphthalene and 149g n-decane were mixed and stirred, 28g Y zeolite was added, and the reaction was carried out at 165°C for 8h. The product is filtered and distilled to obtain alkylnaphthalene. In the reaction, the conversion rate of naphthalene was 87.1%, the product selectivity was 99.9%, and the product yield was 87.0%.

[0029] The color of the alkylnaphthalene product obtained in this example is light yellow, the viscosity at 40°C is 28.21cSt, the viscosity at 100°C is 4.578cSt, the viscosity index is 57, the pour point is -36°C, the flash point is 238°C, and the chromaticity is <0.5 , the acid value is 0.01mgKOH / g, and the water content is 190.1ppm.

Embodiment 3

[0031] First, 154g of C16α-olefin, 80g of naphthalene and 94g of n-decane were mixed and stirred, 16g of Y zeolite was added, and the reaction was carried out at 165°C for 8h. The product is filtered and distilled to obtain alkylnaphthalene. In the reaction, the conversion rate of naphthalene was 87.5%, the product selectivity was 99.9%, and the product yield was 87.4%.

[0032] The color of the alkylnaphthalene product obtained in this example is light yellow, the viscosity at 40°C is 25.59cSt, the viscosity at 100°C is 4.444cSt, the viscosity index is 71, the pour point is -36°C, the flash point is 236°C, and the chromaticity is <0.5 , the acid value is 0.01mgKOH / g, and the water content is 188.7ppm.

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Abstract

The invention discloses a method for preparing alkyl naphthalene lubricant base oil from coal alpha-olefin. The specific preparation method comprises the following steps: mixing coal alpha-olefin, naphthalene and/or methylnaphthalene as raw materials in a solvent, adding a solid acid catalyst, carrying out a reaction under normal pressure conditions, and carrying out suction filtration and distillation after the reaction is completed to obtain the alkyl naphthalene. The conversion rate of the alkylation reaction reaches 94.9%, the selectivity is 99.9%, the yield reaches 94.9%, and the alkyl naphthalene reaches the index of the lubricant base oil; after the catalyst is regenerated, the prepared alkyl naphthalene can still be used as excellent lubricant base oil. The invention provides a new thought for application of long-chain alpha-olefin prepared from coal, and the inherent defects that a homogeneous liquid acid catalyst is not easy to separate from a product, equipment is seriously corroded and the like can be overcome by using the zeolite catalyst, so that the alkylation process is greener.

Description

technical field [0001] The invention belongs to the technical field of high-quality lubricating oil base oil, and in particular relates to a method for preparing class V lubricating oil base oil by green catalyzing coal-to-alpha-olefin with a zeolite solid acid catalyst. Background technique [0002] With the increasingly stringent environmental regulations, the lubricating materials based on mineral oil can no longer meet the requirements, and the research and application of synthetic base oils are gradually increasing. Alkyl naphthalene, which is a type V synthetic base oil, is used in hydraulic oil, gear oil, heat transfer oil, compressor oil and other fields because of its excellent thermal oxidation stability, hydrolysis stability, additive solubility and anti-emulsification performance. Extensive; and with the development of the manufacturing industry, the market size continues to grow. However, at present, the alkylnaphthalene market is completely monopolized by fore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M105/06C10M177/00
CPCC10M105/06C10M177/00C10M2203/065
Inventor 杜燕燕李久盛傅文佳廖廷君赵永清李勇朱德林倪杰陈伟
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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