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Preparation method for capacitor insulating oil

A technology for insulating oil and capacitors, which is applied in the petroleum industry, base materials, lubricating compositions, etc. It can solve the problems of frequent regeneration, complex catalyst preparation process, and non-reusable use, and achieve the effect of increasing yield

Inactive Publication Date: 2015-07-15
中化化工科学技术研究总院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Studies have shown that although concentrated sulfuric acid or solid acid catalysts are used as catalysts, they have higher catalytic activity, but they also have the following limitations: when concentrated sulfuric acid is used as catalysts, there is a large amount of concentrated sulfuric acid and cannot be recycled, resulting in a large amount of (Producing 1 ton of insulating oil will produce about 0.5 tons of waste acid and 1 ton of acid-containing wastewater), concentrated sulfuric acid is highly corrosive, difficult to handle, and cannot be reused; when using solid acid as a catalyst, there will be solid acid The catalyst preparation process is complex, expensive and requires frequent regeneration during the production process, which makes the production cost of capacitor insulating oil high, thus limiting its popularization and application

Method used

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  • Preparation method for capacitor insulating oil
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preparation example Construction

[0011] The preparation method of the capacitor insulating oil provided by the invention comprises that the general formula is Bu 3 P + R 2 R 1 - / nZnCl 2 / mLaCl 3 In the presence of the quaternary phosphonium salt ionic liquid composite catalyst, under stirring conditions, toluene is contacted with benzyl chloride, and the contact conditions include a temperature of 80-110 ° C and a time of 3-8 hours, wherein R 1 is halogen, R 2 for C 10 -C 18 straight-chain or branched-chain alkyl, n is 1-5, and m is 0.01-0.5. Preferably, the contact conditions include a temperature of 80-100° C., a time of 3-8 hours, R 1 is chlorine atom or bromine atom, R 2 for C 12 -C 16 straight-chain alkyl, n is 2-4, m is 0.01-0.1, and n and m represent moles.

[0012] Among them, n represents relative to 1 mole of Bu 3 P + R 2 R 1 - , ZnCl 2 The number of moles is 1-5; m means relative to 1 mole of Bu 3 P + R 2 R 1 - , LaCl 3 The number of moles is 0.01-0.5. The halogen can be ...

preparation example 1

[0031] This preparation example is used to illustrate the quaternary phosphonium salt ionic liquid composite catalyst provided by the present invention and its preparation method.

[0032] 1mol of dodecyltributylphosphonium chloride (purchased from Beijing Ruishibang Fine Chemical Technology Co., Ltd., with a water content of 50% by weight) was stirred and mixed with 500mL of toluene, and heated to 90°C for vacuum distillation until Until there is no effluent at this temperature;

[0033] Put 2mol of zinc chloride and 0.06mol of lanthanum chloride into the oven respectively, and dry at 110°C for 30min;

[0034] Under the protection of nitrogen and under stirring conditions, mix the dodecyltributylphosphonium chloride, zinc chloride and lanthanum chloride treated by the above method evenly, and raise the temperature to 140°C and react for 2 hours , to obtain the quaternary phosphonium salt ionic liquid composite catalyst C1.

preparation example 2

[0036] This preparation example is used to illustrate the quaternary phosphonium salt ionic liquid composite catalyst provided by the present invention and its preparation method.

[0037] Stir and mix 1 mol of tetradecyltributylphosphonium chloride (purchased from Beijing Ruishibang Fine Chemical Technology Co., Ltd., with a water content of 50% by weight) and 500mL of toluene, and heat to 90°C for vacuum distillation until Until there is no effluent at this temperature;

[0038] Put 3mol zinc chloride and 0.02mol lanthanum chloride into the oven respectively, and dry at 110°C for 30min;

[0039] Under the protection of nitrogen and under stirring conditions, mix the tetradecyltributylphosphonium chloride, zinc chloride and lanthanum chloride treated by the above method evenly, and raise the temperature to 120°C and react for 4 hours , to obtain the quaternary phosphonium salt ionic liquid composite catalyst C2.

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Abstract

The invention provides a preparation method for capacitor insulating oil. The method includes: in the presence of a quaternary phosphonium salt ionic liquid composite catalyst with a general formula as Bu3P<+>R2R1<-> / nZnCl2 / mLaCl3, and under stirring, contacting toluene with benzyl chloride at 80-110DEG C for 3-8h. Specifically, R1 is halogen, R2 is straight chain or branched chain alkyl of C10-C18, n is 1-5, and m is 0.01-0.5. Preparation of capacitor insulating oil by the method provided by the invention not only can improve the yield of the reaction product, but also can enhance the yield of monobenzyltoluene and bisbenzyltoluene in the reaction product. In addition, at the end of the reaction, the quaternary phosphonium salt ionic liquid composite catalyst can be effectively recovered, thereby achieving recycling, avoiding pollution to the environment, and reducing the production cost.

Description

technical field [0001] The invention relates to a preparation method of capacitor insulating oil. Background technique [0002] Ionic liquids are a class of environmentally friendly solvents that are generally considered to have broad application prospects and can replace traditional organic solvents. At present, the application fields of ionic liquids mainly include: polymerization reaction, selective alkylation, amination reaction, acylation reaction, esterification reaction, rearrangement reaction of chemical bonds, catalytic hydrogenation reaction at room temperature and normal pressure, cyclic reaction of olefins Oxidation reactions, etc., and show the advantages of fast reaction speed, high conversion rate and selectivity, and the catalytic system can be recycled and reused. The ionic liquid itself has the characteristics of low vapor pressure and stable chemical properties. During the chemical reaction process, no harmful gas that pollutes the atmosphere will be prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M105/06C10M177/00C10N40/16
Inventor 伍振毅王果果赵新殷冬媛梁睿赵瑞英
Owner 中化化工科学技术研究总院有限公司