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Preparation method and application of alkyl tetrahydronaphthalene

A technology of tetralin and alkylation reaction, applied in chemical instruments and methods, base materials, hydrocarbons, etc., can solve problems such as toxic hydrogenation and difficulties

Pending Publication Date: 2021-04-23
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to provide a preparation method of alkyl tetrahydronaphthalene and its application, enrich the molecular structure of alkyl aromatic series base oils, overcome the problems of existing product toxicity and difficulty in hydrogenation, and obtain lubricating oil products with adjustable properties

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  • Preparation method and application of alkyl tetrahydronaphthalene
  • Preparation method and application of alkyl tetrahydronaphthalene
  • Preparation method and application of alkyl tetrahydronaphthalene

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Experimental program
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Embodiment 1

[0027] A kind of preparation method of alkyltetrahydronaphthalene in the present embodiment, comprises the following steps:

[0028] To prepare ionic liquid-type catalysts, FeCl was sequentially 3 (3.0mmol), triethylamine hydrochloride (1.5mmol) and inert organic solvent n-decane (5mL) were added into a three-neck round bottom flask, and stirred continuously in a constant temperature oil bath at 60°C for 1h. According to the molar ratio of tetrahydronaphthalene: 1-hexene is 4:1; the molar ratio of ionic liquid and tetralin is 1:8, firstly tetrahydronaphthalene is added in the ionic liquid, then 1-hexene is slowly dropped into In the mixture, the reaction was stirred at 40 °C for 60 min. The whole process is carried out in a dry high-purity argon atmosphere. After the reaction was over, the mixture was allowed to stand to separate into layers. The liquid product in the upper layer was washed with water to remove a small amount of ionic liquid, and then the inert organic solv...

Embodiment 2

[0031] A kind of preparation method of alkyltetrahydronaphthalene in the present embodiment, comprises the following steps:

[0032] To prepare ionic liquid catalysts, AlCl 3 (3.0mmol), urea (1.5mmol) and inert organic solvent n-decane (5mL) were added into a three-necked round-bottomed flask, and stirred continuously in a constant temperature oil bath at 80°C for 1h. According to the molar ratio of tetralin: 1-octene is 1:1; the molar ratio of ionic liquid and tetralin is 1:6, first add tetralin to the ionic liquid, then slowly drop 1-octene In the mixture, the reaction was stirred at 60 °C for 60 min. The whole process is carried out in a dry high-purity argon atmosphere. After the reaction was over, the mixture was allowed to stand to separate into layers. The liquid product in the upper layer was washed with water to remove a small amount of ionic liquid, and then the inert organic solvent and residual tetralin were distilled off under reduced pressure to obtain a mixed...

Embodiment 3

[0035] A kind of preparation method of alkyltetrahydronaphthalene in the present embodiment, comprises the following steps:

[0036] To prepare ionic liquid catalysts, AlCl 3Add (4.5mmol) and triethylamine hydrochloride (1.5mmol) into a three-necked round-bottomed flask without adding solvent, and stir continuously in a constant temperature oil bath at 50°C for 1h. According to the molar ratio of tetrahydronaphthalene: 1-decene is 1:2; the molar ratio of ionic liquid and tetralin is 1:10, first add tetralin into the ionic liquid, then slowly drop 1-decene In the mixture, the reaction was stirred at 40 °C for 60 min. The whole process is carried out in a dry high-purity argon atmosphere. After the reaction is over, the layers will be left standing. The liquid product in the upper layer was washed with water to remove a small amount of ionic liquid, and then the residual tetralin was distilled under reduced pressure to obtain a mixed alkyl tetralin product.

[0037] The prod...

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Abstract

The invention discloses a preparation method and application of alkyl tetrahydronaphthalene. The alkyl tetrahydronaphthalene comprises one or more alkyl substituents which are the same as one another, and the method comprises the following steps: respectively carrying out alkylation reaction on tetrahydronaphthalene and olefins with different carbon chain lengths by adopting an ionic liquid catalyst; and carrying out standing layering, water washing, reduced pressure distillation and the like on the reaction product to obtain an alkyl tetrahydronaphthalene product, and carrying out segmented reduced pressure distillation on the product to finally obtain the alkyl tetrahydronaphthalene product composed of different side chain numbers. Alkyl tetrahydronaphthalene prepared by the method is used for base oil after being adsorbed and decolored, and has lower viscosity, lower pour point, better thermal stability and excellent additive solubility, and products of different components can be applied to the fields of different oil products according to adjustable properties of the products.

Description

technical field [0001] The invention relates to a preparation method and application of alkyl tetrahydronaphthalene, and relates to the field of base oil application. Background technique [0002] At present, base oils mainly include mineral base oils and synthetic base oils. Synthetic base oils are mainly synthesized by chemical synthesis methods. Common synthetic base oils include polyolefins, synthetic esters, alkyl aromatics, and synthetic naphthenes. As a special type of base oil, naphthenic base oil has the characteristics of high density, low pour point, low viscosity and good thermal stability. Due to the increasing demand for naphthenic oils in recent years, it is of great significance to expand the acquisition channels of naphthenic oils and find suitable raw materials for reactions. It is of great significance to use chemical synthesis routes to synthesize high-quality naphthenic lubricating oils with matching properties on a large scale. The two-stage hydrogena...

Claims

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Application Information

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IPC IPC(8): C07C2/66C07C13/48C10M105/06B01J31/02C10N20/02C10N20/00
CPCC07C2/66C10M105/06C07C2602/10C07C2531/02C10M2203/065C07C13/48Y02P20/584
Inventor 刘雷陈晨汤琼董晋湘
Owner TAIYUAN UNIV OF TECH