KR100767023B1 - Vegetable dielectric coolant and method for manufacturing thereof - Google Patents

Vegetable dielectric coolant and method for manufacturing thereof Download PDF

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KR100767023B1
KR100767023B1 KR1020060073707A KR20060073707A KR100767023B1 KR 100767023 B1 KR100767023 B1 KR 100767023B1 KR 1020060073707 A KR1020060073707 A KR 1020060073707A KR 20060073707 A KR20060073707 A KR 20060073707A KR 100767023 B1 KR100767023 B1 KR 100767023B1
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South Korea
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oil
vegetable
insulating oil
alcohol
vegetable insulating
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KR1020060073707A
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Korean (ko)
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한동희
한세원
강동필
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한국전기연구원
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/20—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/40—Fatty vegetable or animal oils

Abstract

A method for preparing a vegetable transformer oil used in a power equipment is provided to lower viscosity and to reduce a flash point to 300 deg.C or more, thereby improving stability. A method for preparing a vegetable transformer oil comprises the steps of (S10,S20) reacting a vegetable oil and a lower molecular weight alcohol in the presence of an alkali catalyst by esterification; (S40) phase separating the obtained ester compound and glycerin by adding water and petroleum ether; and (S50) distilling the phase separated ester compound to remove the remaining alcohol and water. Preferably the ratio of the vegetable oil and the lower molecular weight alcohol is 1:3 to 1:9 by mol; and the alkali catalyst is any one selected from KOH, NaOH, LiOH and a sodium alkoxide.

Description

식물성 절연유의 제조 방법 및 이를 이용하여 제조되는 식물성 절연유{vegetable dielectric coolant and method for manufacturing thereof}Method for manufacturing vegetable insulating oil and vegetable insulating oil manufactured using the same

도 1은 식물성 절연유의 제조 방법에 관한 절차도이다.1 is a flowchart of a method of preparing vegetable insulating oil.

본 발명은 식물성 절연유의 제조 방법 및 이를 이용하여 제조되는 식물성 절연유에 관한 것으로, 특히 식물성 기름과 저분자 알콜을 반응물로 하고 이 반응물을 촉매 존재하에서 반응시켜 식물성 절연유인 에스테르 물질을 생성한 후, 반응 생성물인 에스테르와 미반응 물질을 포함한 글리세롤 층을 용이하게 상분리함으로써, 적당한 점도를 가지는 절연유를 얻을 수 있는 식물성 절연유의 제조 방법 및 이를 이용하여 제조되는 식물성 절연유에 관한 것이다.The present invention relates to a method for preparing vegetable insulating oil and a vegetable insulating oil prepared by using the same, and in particular, a vegetable oil and a low molecular alcohol as a reactant, and reacting the reactant in the presence of a catalyst to produce an ester substance which is a vegetable insulating oil, and then a reaction product. The present invention relates to a method for preparing vegetable insulating oil which can obtain an insulating oil having an appropriate viscosity by easily phase-separating a glycerol layer containing a phosphorus ester and an unreacted substance, and a vegetable insulating oil prepared using the same.

최근 개발되는 전력기기에 대하여 환경 기후 협약에 따른 규약의 대응으로 인체 및 자연환경에 친화적이어야 하며 또한 경제성의 향상, 소형화에 대한 요구가 증가되고 있다. 종래의 변압기 오일에 있어서 석유를 기초로 한 광유는 PCB 성분으로 인하여 인체 유해성 및 환경오염 문제가 매우 심각하고 인화점이 150 ℃ 정도로 낮아 과부하시 폭발의 위험성을 내포하고 있으며, 실리콘유는 동점도가 높아 변압기 내부에서 순환이 양호하지 못해 냉각효율이 떨어지는 단점이 있었다. In recent years, the power equipment to be developed should be friendly to the human body and the natural environment in response to the conventions in accordance with the Environmental Climate Convention, and the demand for economic improvement and miniaturization is increasing. In conventional transformer oil, petroleum-based mineral oil has very serious human hazards and environmental pollution problems due to PCB components, and has a flash point of about 150 ° C., which implies the risk of explosion when overloaded, and silicone oil has a high kinematic viscosity. There was a drawback of low cooling efficiency due to poor circulation inside.

또한 유입변압기에 있어서 유분출 고장은 도심지에 있어서 화재로 인한 인명사고와 2차적인 문제를 유발시킬 수 있으며, 토양과 특히 수질오염은 심각한 문제가 아닐 수 없다.In addition, oil spill failures in inlet transformers can cause fire accidents and secondary problems in urban areas. Soil and especially water pollution are serious problems.

이러한 문제점을 해결할 수 있는 순환자원으로서 기존의 석유를 기초로 한 절연유와 대별될 수 있는 생분해성 식물성 절연유로서, 매년 지속적으로 재배되는 식물성 기름을 이용한 절연유에 대한 연구가 이루어지고 있고 현재 그 실용화에 있어서도 많은 진보적 기술이 제안되고 있다. A biodegradable vegetable insulating oil that can be distinguished from existing petroleum-based insulating oils as a circulating resource that can solve these problems, and researches on insulating oils using vegetable oils cultivated every year are being conducted. Many progressive technologies have been proposed.

본 발명은 상기와 같은 종래 기술의 문제점을 해결하기 위하여 창안된 것으로, 변압기와 같은 전력기기에 절연유로 사용하기에는 그 자체의 점도가 높아 냉각효율에 문제가 되는 단점을 극복하기 위하여, 식물유와 알콜의 에스테르화 반응을 이용하여 점도를 기존의 광유 수준으로 낮출 수 있는 식물성 절연유의 제조 방법 및 이를 이용하여 제조되는 식물성 절연유를 제공하는 것을 그 목적으로 한다.The present invention was devised to solve the problems of the prior art as described above, in order to overcome the disadvantage that the viscosity itself is high to use as an insulating oil in power equipment such as transformers, a problem in cooling efficiency, It is an object of the present invention to provide a method for preparing vegetable insulating oil which can lower the viscosity to the level of existing mineral oil by using an esterification reaction, and a vegetable insulating oil produced using the same.

또한, 식물성 기름 및 알콜을 반응물로 하고 이 반응물을 촉매 존재하에서 반응시켜 식물성 절연유인 에스테르 물질을 생성한 후, 과량의 물과 석유에테르를 첨가하여 반응 생성물인 에스테르와 미반응 물질을 포함한 글리세롤 층으로 상분리가 쉽게 일어나 생산성 및 수율을 향상시킬 수 있는 식물성 절연유의 제조방법 및 이를 이용하여 제조되는 식물성 절연유를 제공하는 것을 그 목적으로 한다.In addition, vegetable oil and alcohol are used as reactants, and the reactants are reacted in the presence of a catalyst to produce an ester substance which is vegetable insulating oil, and then an excess of water and petroleum ether are added to the glycerol layer containing the reaction product ester and unreacted substance. It is an object of the present invention to provide a method for preparing vegetable insulating oil which can be easily separated and improve productivity and yield, and a vegetable insulating oil produced using the same.

상기와 같은 기술적 과제를 해결하기 위하여 제안된 본 발명인 식물성 절연유의 제조방법을 이루는 구성수단은, 변압기 등의 전력기기에 사용되는 식물성 절연유 제조 방법에 있어서, 식물성 기름과 저분자 알콜을 혼합하여 알칼리 촉매 하에서 에스테르화 반응을 시키는 단계, 상기 에스테르화 반응에 의하여 생성된 에스테르 물질과 글리세린을 상분리시키는 단계, 상기 상분리된 에스테르 물질을 증류시켜 잔존하는 알콜과 수분을 제거하는 단계를 포함하여 이루어진 것을 특징으로 한다.In order to solve the technical problem as described above, the constituent means constituting the method for producing vegetable insulating oil of the present invention is a method for producing vegetable insulating oil for use in power equipment such as transformers, by mixing vegetable oil and low molecular alcohol under an alkali catalyst. Performing an esterification reaction, phase separating the ester material and glycerin produced by the esterification reaction, and distilling the phase separated ester material to remove residual alcohol and water.

또한, 상기 식물성 기름과 저분자 알콜은 1 : 3 ~ 1 : 9의 몰비로 혼합되는 것을 특징으로 하고, 상기 식물성 기름은 대두유, 유채유, 해바라기유, 팜유, 면실유, 동백유, 옥수수유 및 미강유 중 어느 하나인 것이 바람직하고, 상기 저분자 알콜은 프로판올, 이소프로필알콜, 부탄올 및 이소부틸알콜 중 어느 하나 또는 두개 이상이 혼합된 혼합물인 것이 바람직하다.In addition, the vegetable oil and low-molecular alcohol is characterized in that it is mixed in a molar ratio of 1: 3 to 1: 9, wherein the vegetable oil is any one of soybean oil, rapeseed oil, sunflower oil, palm oil, cottonseed oil, camellia oil, corn oil and rice bran oil Preferably, the low molecular alcohol is preferably a mixture of any one or two or more of propanol, isopropyl alcohol, butanol and isobutyl alcohol.

또한, 상기 알칼리 촉매는 KOH, NaOH, LiOH 및 sodium alkoxide 중 어느 하나인 것을 특징으로 하고, 상기 알칼리 촉매는 상기 식물성 기름 중량에 대해 0.1% ~ 2.0% 만큼 첨가되는 것이 바람직하다.In addition, the alkali catalyst is characterized in that any one of KOH, NaOH, LiOH and sodium alkoxide, the alkali catalyst is preferably added by 0.1% to 2.0% by weight of the vegetable oil.

또한, 상기 에스테르화 반응은 40℃ ~ 90℃의 불활성 가스 분위기 하에서 200rpm ~ 10000rpm의 교반속도로 0.1 ~ 4시간 동안 이루어지는 것을 특징으로 한다.In addition, the esterification reaction is characterized in that for 0.1 to 4 hours at a stirring speed of 200rpm ~ 10000rpm under an inert gas atmosphere of 40 ℃ ~ 90 ℃.

또한, 상기 에스테르 물질과 글리세린의 상분리는 물과 석유에테르를 첨가하여 이루어지는 것을 특징으로 한다.In addition, the phase separation of the ester substance and glycerin is characterized by the addition of water and petroleum ether.

한편, 또 다른 본 발명은 상기 식물성 절연유의 제조방법을 이용하여 제조되는 식물성 절연유를 제공할 수 있다On the other hand, the present invention can provide a vegetable insulating oil prepared using the method for producing a vegetable insulating oil.

이하, 첨부된 도면을 참조하여 상기와 같은 구성수단으로 이루어져 있는 본 발명인 식물성 절연유의 제조 방법 및 이를 이용하여 제조되는 식물성 절연유에 관한 바람직한 실시예를 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the method for producing a vegetable insulating oil of the present invention consisting of the above configuration means and a vegetable insulating oil produced using the same.

도 1은 본 발명의 실시예에 따른 식물성 절연유를 제조하는 방법에 대한 절차도를 보여준다. 이를 참조하여 식물성 절연유의 제조 방법을 설명한다.Figure 1 shows a procedure for a method for producing a vegetable insulating oil according to an embodiment of the present invention. With reference to this it will be described a method for producing a vegetable insulating oil.

먼저 식물성 기름과 저분자 알콜을 소정 비율로 혼합한다. 그리고, 혼합된 상기 식물성 기름과 저분자 알콜을 알칼리 촉매 하에서 에스테르화 반응을 진행시킨다(S10 ~ S20).First, vegetable oil and low molecular alcohol are mixed at a predetermined ratio. Then, the mixed vegetable oil and the low molecular alcohol are subjected to an esterification reaction under an alkali catalyst (S10 to S20).

상기 식물성 기름과 저분자 알콜은 다양한 비율로 혼합시킬 수 있는데, 본 발명에서는 1 : 3 ~ 1 : 9의 몰비로 상기 식물성 기름과 저분자 알콜을 혼합시킨다. The vegetable oil and the low molecular alcohol may be mixed in various ratios. In the present invention, the vegetable oil and the low molecular alcohol are mixed in a molar ratio of 1: 3 to 1: 9.

상기 식물성 기름은 식물에서 얻을 수 있는 기름이면 무난하나, 본 발명에서는 대두유, 유채유, 해바라기유, 팜유, 면실유, 동백유, 옥수수유 및 미강유 중 어느 하나의 식물성 기름을 이용한다. 그리고, 상기 식물성 기름 중 어느 하나와 소정 비율로 혼합되는 저분자 알콜은 프로판올, 이소프로필알콜, 부탄올 및 이소부틸 알콜 중 어느 하나 또는 두개 이상이 혼합된 혼합물을 사용한다.The vegetable oil may be an oil obtained from a plant, but in the present invention, any one vegetable oil of soybean oil, rapeseed oil, sunflower oil, palm oil, cottonseed oil, camellia oil, corn oil, and rice bran oil is used. The low molecular weight alcohol mixed with any one of the vegetable oils in a predetermined ratio uses a mixture of any one or two or more of propanol, isopropyl alcohol, butanol and isobutyl alcohol.

상기 혼합된 식물성 기름과 저분자 알콜에 첨가되는 촉매는 산 또는 알칼리 촉매일 수 있는 데, 본 발명에서는 알칼리 촉매를 사용한다. 즉, KOH, NaOH, LiOH, sodium alkoxide 중 어느 하나를 촉매로 사용하는 것이 바람직하다. 이 때 첨가되는 촉매는 상기 식물성 기름의 중량에 대해 0.1% ~ 2.0 % 만큼 첨가되는 것이 바람직하다.The catalyst added to the mixed vegetable oil and low molecular alcohol may be an acid or an alkali catalyst, in which the alkali catalyst is used in the present invention. That is, it is preferable to use any one of KOH, NaOH, LiOH, sodium alkoxide as a catalyst. The catalyst added at this time is preferably added by 0.1% to 2.0% by weight of the vegetable oil.

상기와 같이 식물성 기름과 저분자 알콜을 혼합하여 알칼리 촉매 하에서 에스테르화 반응을 진행시키는데, 이 에스테르화 반응은 40℃ ~ 90℃의 불활성 가스 분위기 하에서 200rpm ~ 10,000rpm의 교반속도로 0.1 ~ 4시간 동안 이루어진다.As described above, the vegetable oil and the low molecular alcohol are mixed to proceed with the esterification reaction under an alkali catalyst, and the esterification reaction is performed at a stirring speed of 200 rpm to 10,000 rpm for 0.1 to 4 hours under an inert gas atmosphere of 40 ° C. to 90 ° C. .

상기와 같은 에스테르화 반응을 진행시키면, 에스테르 물질과 반응하지 않고 잔존하는 글리세롤 물질이 생성된다(S30). 그러면, 상기와 같이 생성된 에스테르 물질과 글리세린 물질에 대하여 상분리를 수행한다(S40). 상기 상분리는 과량의 물과 석유에테르를 상기 생성된 에스테르 물질과 글리세린 물질에 첨가하여 이루어진다. 그러면, 상기 에스테르 물질을 용이하게 분리하여 얻을 수 있다.Proceeding the esterification as described above, the remaining glycerol material is produced without reacting with the ester material (S30). Then, phase separation is performed on the ester material and the glycerin material produced as described above (S40). The phase separation is accomplished by adding excess water and petroleum ether to the resulting ester material and glycerin material. Then, the ester substance can be easily separated and obtained.

상기와 같은 상분리를 통해 얻어진 에스테르 물질에는 미량의 알콜과 수분이 포함되어 있을 수 있다. 따라서, 상기 상분리된 에스테르 물질을 증류시켜 잔존하는 알콜과 수분을 제거시켜, 점성이 작아진 식물성 절연유로 사용되는 에스테르 물질을 최종적으로 얻을 수 있다(S50).The ester material obtained through the above phase separation may contain a small amount of alcohol and water. Thus, by distilling the phase-separated ester material to remove the remaining alcohol and water, it is possible to finally obtain the ester material used as vegetable insulating oil with a reduced viscosity (S50).

이와 같은 공정에 의하여 얻어진 식물성 절연유는 점성이 적당하고 광유보다 인화점이 높아 안전한 절연유로 사용될 수 있다.The vegetable insulating oil obtained by such a process may be used as a safe insulating oil having a suitable viscosity and a higher flash point than mineral oil.

식물성 절연유를 얻기 위한 에스테르화 반응을 예를 들어 설명하면 다음과 같다.An esterification reaction for obtaining vegetable insulating oil will be described with reference to the following.

식물성 기름(트리글리세라이드)과 저분자 알콜로서 이소프로필알콜이 촉매 존재하에서 반응하면 하기의 반응식과 같이 에스테르물질인 식물성 절연유와 글리세린이 생성된다. 하기 반응식에서 R1, R2 및 R3는 탄소수가 C12 ~ C24인 알킬기이다.When vegetable oil (triglyceride) and isopropyl alcohol are reacted in the presence of a catalyst as a low molecular alcohol, vegetable insulating oil and glycerin, which are ester substances, are produced as shown in the following scheme. In the following reaction schemes R1, R2 and R3 is an alkyl group of carbon number C 12 ~ C 24.

Figure 112006056095038-pat00001
Figure 112006056095038-pat00001

에스테르화 반응후 반응의 정도는 TLC, GC 등을 통하여 공정검사를 하여 확인이 가능하다. 이때 발생하는 글리세롤 등의 분리가 공업적으로 가장 큰 문제이다. 염기 등의 부산물 제거를 위하여 산을 사용하였으며 미량의 사용으로 중화적정을 하였다. After esterification, the degree of reaction can be confirmed by process inspection through TLC, GC and the like. Separation of glycerol, etc. generated at this time is the biggest industrial problem. Acid was used to remove by-products such as base, and neutralization titration was performed using a small amount.

본 발명에서 식물성 기름과 알콜의 에스테르화 반응이 종료되면, 과량의 물과 석유에테르를 첨가하여 반응 생성물인 에스테르와 미반응 물질을 포함한 글리세롤 층으로 상분리가 쉽게 일어나도록 한다. 즉, 상부는 에스테르 층, 하부는 글리세롤 층으로 상분리가 일어난다.In the present invention, when the esterification reaction of the vegetable oil and alcohol is terminated, an excess of water and petroleum ether are added to facilitate phase separation into the glycerol layer containing the reaction product ester and unreacted material. That is, the upper phase is separated into an ester layer and the lower part is a glycerol layer.

그런 다음, 상온으로 냉각하고 상층부의 에스테르를 회수하여 중화시킨 후 에스테르에 잔존할 수 있는 알콜과 수분을 제거하기 위하여 증류를 실시한다.Then, the mixture is cooled to room temperature, the ester of the upper layer is recovered and neutralized, and then distilled to remove alcohol and water remaining in the ester.

상기와 같은 구성 및 작용 그리고 바람직한 실시예를 가지는 본 발명인 식물성 절연유의 제조 방법 및 이를 이용하여 제조되는 식물성 절연유에 의하면, 변압기와 같은 전력기기에 식물유를 그 자체 그대로 절연유로 사용할 때 발생하는 높은 점도 문제를 식물성 기름과 저분자 알콜의 에스테르화 반응 및 상분리를 통해 해결할 수 있는 장점이 있다.According to the method of manufacturing vegetable insulating oil of the present invention having the above-described configuration and operation and preferred embodiments, and the vegetable insulating oil prepared by using the same, a high viscosity problem generated when using vegetable oil as an insulating oil in a power device such as a transformer as it is There is an advantage that can be solved through esterification and phase separation of vegetable oil and low molecular alcohol.

또한, 기존의 광유의 경우 인화점이 150 ℃ 정도로 낮아 과부하시 폭발의 위험성을 내포하고 있으나 본 발명에 따른 식물성 절연유는 인화점이 300 ℃이상이 되기 때문에, 안정성이 뛰어난 효과가 있다.In addition, in the case of the conventional mineral oil has a flash point of about 150 ℃ low contains a risk of explosion when overload, but the vegetable insulating oil according to the present invention has a flash point of 300 ℃ or more, it has an excellent stability effect.

또한, 본 발명에 따른 식물성 절연유에 의하면, 해외의존도가 큰 기존의 석유계 절연유인 광유 및 합성유의 해외의존도를 낮추고, 환경 오염물질을 최소화할 수 있는 효과가 있다.In addition, according to the vegetable insulating oil according to the present invention, there is an effect that can reduce the international dependence of the mineral oil and synthetic oil of the existing petroleum-based insulating oil having a large overseas dependency, and minimize the environmental pollutants.

Claims (9)

전력기기에 사용되는 식물성 절연유 제조 방법에 있어서,In the method of manufacturing vegetable insulating oil used in power equipment, 식물성 기름과 저분자 알콜을 혼합하여 알칼리 촉매 하에서 에스테르화 반응을 시키는 단계;Mixing the vegetable oil and the low molecular alcohol to cause an esterification reaction under an alkali catalyst; 상기 에스테르화 반응에 의하여 생성된 에스테르 물질과 글리세린을 물과 석유에테르를 첨가하여 상분리시키는 단계;Phase separating the ester substance and glycerin produced by the esterification reaction by adding water and petroleum ether; 상기 상분리된 에스테르 물질을 증류시켜 잔존하는 알콜과 수분을 제거하는 단계를 포함하여 이루어진 것을 특징으로 하는 식물성 절연유의 제조방법.Method of producing a vegetable insulating oil comprising the step of distilling the phase separated ester material to remove the remaining alcohol and water. 청구항 1에 있어서,The method according to claim 1, 상기 식물성 기름과 저분자 알콜은 1 : 3 ~ 1 : 9의 몰비로 혼합되는 것을 특징으로 하는 식물성 절연유의 제조방법.The vegetable oil and low-molecular alcohol is a manufacturing method of vegetable insulating oil, characterized in that mixed in a molar ratio of 1: 3 to 1: 9. 청구항 2에 있어서,The method according to claim 2, 상기 식물성 기름은 대두유, 유채유, 해바라기유, 팜유, 면실유, 동백유, 옥수수유 및 미강유 중 어느 하나인 것을 특징으로 하는 식물성 절연유의 제조방법.The vegetable oil is a method for producing vegetable insulating oil, characterized in that any one of soybean oil, rapeseed oil, sunflower oil, palm oil, cottonseed oil, camellia oil, corn oil and rice bran oil. 청구항 2에 있어서,The method according to claim 2, 상기 저분자 알콜은 프로판올, 이소프로필알콜, 부탄올 및 이소부틸알콜 중 어느 하나 또는 두개 이상이 혼합된 혼합물인 것을 특징으로 하는 식물성 절연유의 제조방법.The low molecular alcohol is a method for producing vegetable insulating oil, characterized in that any one or a mixture of two or more of propanol, isopropyl alcohol, butanol and isobutyl alcohol. 청구항 1에 있어서,The method according to claim 1, 상기 알칼리 촉매는 KOH, NaOH, LiOH 및 sodium alkoxide 중 어느 하나인 것을 특징으로 하는 식물성 절연유의 제조방법.The alkali catalyst is a method for producing vegetable insulating oil, characterized in that any one of KOH, NaOH, LiOH and sodium alkoxide. 청구항 5에 있어서,The method according to claim 5, 상기 알칼리 촉매는 상기 식물성 기름 중량에 대해 0.1% ~ 2.0% 만큼 첨가되는 것을 특징으로 하는 식물성 절연유의 제조방법.The alkali catalyst is a method for producing vegetable insulating oil, characterized in that added by 0.1% to 2.0% by weight of the vegetable oil. 청구항 1에 있어서,The method according to claim 1, 상기 에스테르화 반응은 40℃ ~ 90℃의 불활성 가스 분위기 하에서 200rpm ~ 10000rpm의 교반속도로 0.1 ~ 4시간 동안 이루어지는 것을 특징으로 하는 식물성 절연유의 제조방법.The esterification reaction is a method for producing vegetable insulating oil, characterized in that for 0.1 to 4 hours at a stirring speed of 200rpm to 10000rpm under an inert gas atmosphere of 40 ℃ ~ 90 ℃. 삭제delete 삭제delete
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101157893B1 (en) * 2010-07-01 2012-06-22 한국건설생활환경시험연구원 Vegetable insulating oil composition for transformer and the method for producing thereof
KR101384267B1 (en) 2007-11-26 2014-04-11 에스케이종합화학 주식회사 Vegetable insulating oil composition
KR20200048992A (en) * 2018-10-31 2020-05-08 경희대학교 산학협력단 Preparation method of fatty acid isoalkyl ester based vegetable insulating oil

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005022558A1 (en) 2003-08-27 2005-03-10 Lion Corporation Base for electric insulating oil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005022558A1 (en) 2003-08-27 2005-03-10 Lion Corporation Base for electric insulating oil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
전기전자재료학회논문지, 제19권제1호(2006년1월) 40쪽~45쪽

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101384267B1 (en) 2007-11-26 2014-04-11 에스케이종합화학 주식회사 Vegetable insulating oil composition
KR101157893B1 (en) * 2010-07-01 2012-06-22 한국건설생활환경시험연구원 Vegetable insulating oil composition for transformer and the method for producing thereof
KR20200048992A (en) * 2018-10-31 2020-05-08 경희대학교 산학협력단 Preparation method of fatty acid isoalkyl ester based vegetable insulating oil
KR102197682B1 (en) * 2018-10-31 2021-01-04 경희대학교 산학협력단 Preparation method of fatty acid isoalkyl ester based vegetable insulating oil

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