Composition with benzyl benzoate and benzyltoluene as main components and application thereof

Abstract

The invention relates to the field of dielectric oil, in particular to a composition with benzyl benzoate and benzyl toluene as main components and application of the composition. The composition comprises benzyl benzoate and benzyl toluene, and is formed by compounding and refining benzyl benzoate and benzyl toluene as main components, the comprehensive performance of the composition is excellent and is not inferior to that of existing like products, and particularly, the dielectric constant is obviously improved.

Description

Technical Field

[0001] The invention relates to the field of dielectric oil, in particular to a composition with benzyl benzoate and benzyltoluene as main components and application thereof. Background Art

[0002] Electricity is the driving force of the modern economy and the soul of the digital economy. The power grid is the basic guarantee for power supply. With the development of many green power industries such as photovoltaics, wind power, and hydropower, higher requirements are also put forward for the development and configuration of the power grid. Transformers and power capacitors in substations are inseparable from liquid dielectrics (insulating oil). Insulating oil has gone through natural oils and fats, and then the continuous progress of synthetic oils has completed multiple generations of updates. The best product recognized internationally today is: mono / dibenzyltoluene (M / DBT) mixture, which was developed by France in the 1980s. The electrical properties of this dielectric material are excellent, but its dielectric constant is not high enough. Especially with the development of science and technology and the progress of PP film for power capacitors, its supporting material as an impregnant has become a relative "short board". Summary of the invention

[0003] In order to overcome the shortcoming that the dielectric constant of the existing dielectric oil is not high enough, the present invention provides a composition with benzyl benzoate and benzyltoluene as main components and its application.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a composition with benzyl benzoate and benzyltoluene as main components and its application, wherein the composition comprises benzyl benzoate and benzyltoluene;

[0005] The general structural formula of benzyl benzoate is:

[0006]

[0007] The general structural formula of benzyltoluene is:

[0008]

[0009] According to another embodiment of the present invention, the content of benzyl benzoate in the composition is 20%-60%.

[0010] According to another embodiment of the present invention, the content of benzyl benzoate in the composition is 40%-50%.

[0011] The invention discloses an application of a composition with benzyl benzoate and benzyltoluene as main components as dielectric oil.

[0012] The beneficial effect of the present invention is that the invention uses benzyl benzoate and benzyltoluene as main components to process and manufacture a dielectric with a high dielectric constant, and its comprehensive performance is significantly improved compared with the current insulating oil. DETAILED DESCRIPTION

[0013] A composition with benzyl benzoate and benzyltoluene as main components, the composition comprising benzyl benzoate and benzyltoluene;

[0014] The general structural formula of benzyl benzoate is:

[0015]

[0016] The general structural formula of benzyltoluene is:

[0017]

[0018] The composition can also add antioxidants, anti-hydrolysis agents, anti-chlorine agents and other additives to benzyl benzoate and benzyltoluene.

[0019] The content of benzyl benzoate in the composition is 20%-60%, and the better content is 40%-50%.

[0020] A preparation process of a composition with benzyl benzoate and benzyltoluene as main components as dielectric oil comprises:

[0021] First, benzyl benzoate and benzyltoluene are mixed evenly. The mixing can be carried out under stirring in a container or by a static mixer. The heating temperature during the preparation process is preferably ≤ 70°C.

[0022] Secondly, the mixed material is subjected to a number of refining processes including electric precipitation, ion exchange column, clay adsorption, fine filtration, high vacuum degassing and dehydration to obtain insulating oil with a high dielectric constant.

[0023] Due to its good physical, chemical and electrical indicators and low viscosity, it is also particularly suitable as an impregnating agent for all-PP film power capacitors.

[0024] The invention discloses an application of a composition with benzyl benzoate and benzyltoluene as main components as dielectric oil.

[0025] Performance of benzyl benzoate and benzyltoluene at different ratios:

[0026] The dielectric composed of benzyl benzoate and benzyltoluene has ideal comprehensive performance when the percentage of benzyl benzoate is in the range of 20 to 60%.

[0027] The following table lists the relative dielectric constant (measured according to GB / T5654-2007) when benzyl benzoate accounts for different proportions (%) of the composition; the breakdown voltage (measured according to IEC60156:1995); and the kinematic viscosity (measured according to GB / T265-1988).

[0028]

[0029]

[0030] As the proportion of benzyl benzoate increases, the relative dielectric constant increases, the breakdown voltage stabilizes, but the kinematic viscosity increases. The proportion of benzyl benzoate is 40-50%, and its dielectric constant is higher than that of C101 (M / DBT), with an increase of up to 20-30%.

Claims

1. A composition with benzyl benzoate and benzyltoluene as main components, characterized in that: The composition includes benzyl benzoate and benzyltoluene; The general structural formula of benzyl benzoate is: The general structural formula of benzyltoluene is:

2. The composition according to claim 1, wherein the composition comprises benzyl benzoate and benzyltoluene as main components, The content of benzyl benzoate in the composition is 20%-60%.

3. The composition according to claim 2, wherein the composition comprises benzyl benzoate and benzyltoluene as main components, The content of benzyl benzoate in the composition is 40%-50%.

4. Use of the composition comprising benzyl benzoate and benzyltoluene as main components according to any one of claims 1 to 3 as dielectric oil.

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